./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:45:05,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:45:05,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:45:05,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:45:05,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:45:05,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:45:05,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:45:05,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:45:05,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:45:05,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:45:05,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:45:05,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:45:05,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:45:05,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:45:05,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:45:05,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:45:05,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:45:05,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:45:05,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:45:05,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:45:05,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:45:05,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:45:05,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:45:05,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:45:05,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:45:05,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:45:05,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:45:05,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:45:05,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:45:05,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:45:05,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:45:05,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:45:05,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:45:05,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:45:05,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:45:05,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:45:05,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:45:05,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:45:05,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:45:05,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:45:05,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:45:05,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:45:05,918 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:45:05,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:45:05,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:45:05,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:45:05,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:45:05,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:45:05,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:45:05,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:45:05,921 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:45:05,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:45:05,922 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:45:05,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:45:05,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:45:05,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:45:05,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:45:05,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:45:05,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:45:05,923 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:45:05,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:45:05,923 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:45:05,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:45:05,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:45:05,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:45:05,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:45:05,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:45:05,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:45:05,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:45:05,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:45:05,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:45:05,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:45:05,925 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:45:05,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:45:05,926 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:45:05,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:45:05,926 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:45:05,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:45:06,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:45:06,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:45:06,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:45:06,320 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:45:06,321 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:45:06,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-30 18:45:07,326 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:45:07,485 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:45:07,485 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-30 18:45:07,492 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/882614e08/cdc9804febe2421aa3bc52235d8e5144/FLAG69510fef7 [2023-08-30 18:45:07,506 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/882614e08/cdc9804febe2421aa3bc52235d8e5144 [2023-08-30 18:45:07,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:45:07,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:45:07,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:45:07,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:45:07,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:45:07,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fcb5a56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07, skipping insertion in model container [2023-08-30 18:45:07,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:45:07,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:45:07,644 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c[2728,2741] [2023-08-30 18:45:07,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:45:07,670 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:45:07,699 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c[2728,2741] [2023-08-30 18:45:07,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:45:07,721 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:45:07,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07 WrapperNode [2023-08-30 18:45:07,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:45:07,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:45:07,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:45:07,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:45:07,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,752 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 283 [2023-08-30 18:45:07,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:45:07,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:45:07,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:45:07,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:45:07,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,774 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:45:07,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:45:07,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:45:07,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:45:07,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (1/1) ... [2023-08-30 18:45:07,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:45:07,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:07,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 18:45:07,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 18:45:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:45:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:45:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:45:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:45:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 18:45:07,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 18:45:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 18:45:07,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 18:45:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 18:45:07,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 18:45:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:45:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:45:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:45:07,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:45:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:45:07,870 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:45:07,965 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:45:07,967 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:45:08,239 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:45:08,247 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:45:08,247 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 18:45:08,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:45:08 BoogieIcfgContainer [2023-08-30 18:45:08,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:45:08,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:45:08,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:45:08,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:45:08,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:45:07" (1/3) ... [2023-08-30 18:45:08,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0aca32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:45:08, skipping insertion in model container [2023-08-30 18:45:08,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:45:07" (2/3) ... [2023-08-30 18:45:08,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0aca32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:45:08, skipping insertion in model container [2023-08-30 18:45:08,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:45:08" (3/3) ... [2023-08-30 18:45:08,256 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2023-08-30 18:45:08,261 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:45:08,267 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:45:08,267 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:45:08,267 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:45:08,368 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 18:45:08,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 318 transitions, 660 flow [2023-08-30 18:45:08,543 INFO L130 PetriNetUnfolder]: 28/315 cut-off events. [2023-08-30 18:45:08,544 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:45:08,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 315 events. 28/315 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 504 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 245. Up to 3 conditions per place. [2023-08-30 18:45:08,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 300 places, 318 transitions, 660 flow [2023-08-30 18:45:08,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 305 transitions, 628 flow [2023-08-30 18:45:08,563 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:45:08,571 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 305 transitions, 628 flow [2023-08-30 18:45:08,574 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 305 transitions, 628 flow [2023-08-30 18:45:08,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 305 transitions, 628 flow [2023-08-30 18:45:08,643 INFO L130 PetriNetUnfolder]: 28/305 cut-off events. [2023-08-30 18:45:08,644 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:45:08,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 305 events. 28/305 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 503 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 245. Up to 3 conditions per place. [2023-08-30 18:45:08,652 INFO L119 LiptonReduction]: Number of co-enabled transitions 14784 [2023-08-30 18:45:15,819 INFO L134 LiptonReduction]: Checked pairs total: 16298 [2023-08-30 18:45:15,819 INFO L136 LiptonReduction]: Total number of compositions: 336 [2023-08-30 18:45:15,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:45:15,852 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;@68f77d0d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:45:15,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:45:15,863 INFO L130 PetriNetUnfolder]: 8/35 cut-off events. [2023-08-30 18:45:15,863 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:45:15,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:15,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:15,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:45:15,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:15,868 INFO L85 PathProgramCache]: Analyzing trace with hash -917067574, now seen corresponding path program 1 times [2023-08-30 18:45:15,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:15,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217011657] [2023-08-30 18:45:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:15,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:16,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:16,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217011657] [2023-08-30 18:45:16,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217011657] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:45:16,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:45:16,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:45:16,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266269989] [2023-08-30 18:45:16,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:45:16,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:16,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:45:16,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:45:16,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 654 [2023-08-30 18:45:16,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 280.4) internal successors, (1402), 5 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:16,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:16,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 654 [2023-08-30 18:45:16,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:16,880 INFO L130 PetriNetUnfolder]: 1848/2604 cut-off events. [2023-08-30 18:45:16,880 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-30 18:45:16,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5448 conditions, 2604 events. 1848/2604 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10381 event pairs, 646 based on Foata normal form. 1/1980 useless extension candidates. Maximal degree in co-relation 2528. Up to 1171 conditions per place. [2023-08-30 18:45:16,888 INFO L137 encePairwiseOnDemand]: 647/654 looper letters, 92 selfloop transitions, 6 changer transitions 4/102 dead transitions. [2023-08-30 18:45:16,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 102 transitions, 462 flow [2023-08-30 18:45:16,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:45:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:45:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1759 transitions. [2023-08-30 18:45:16,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44826707441386343 [2023-08-30 18:45:16,902 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1759 transitions. [2023-08-30 18:45:16,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1759 transitions. [2023-08-30 18:45:16,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:16,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1759 transitions. [2023-08-30 18:45:16,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 293.1666666666667) internal successors, (1759), 6 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:16,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 654.0) internal successors, (4578), 7 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:16,918 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 654.0) internal successors, (4578), 7 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:16,919 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 90 flow. Second operand 6 states and 1759 transitions. [2023-08-30 18:45:16,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 102 transitions, 462 flow [2023-08-30 18:45:16,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 102 transitions, 426 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 18:45:16,924 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 117 flow [2023-08-30 18:45:16,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-08-30 18:45:16,927 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-30 18:45:16,927 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 117 flow [2023-08-30 18:45:16,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.4) internal successors, (1402), 5 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:16,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:16,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:16,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:45:16,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:45:16,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1395278390, now seen corresponding path program 1 times [2023-08-30 18:45:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:16,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231819176] [2023-08-30 18:45:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:16,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:17,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:17,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231819176] [2023-08-30 18:45:17,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231819176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:17,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061647555] [2023-08-30 18:45:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:17,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:17,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:45:17,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:45:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:17,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 18:45:17,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:17,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:17,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061647555] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:17,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:45:17,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 13 [2023-08-30 18:45:17,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444929394] [2023-08-30 18:45:17,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:17,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:45:17,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:17,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:45:17,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-30 18:45:17,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 654 [2023-08-30 18:45:17,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 270.8333333333333) internal successors, (1625), 6 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:17,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:17,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 654 [2023-08-30 18:45:17,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:18,245 INFO L130 PetriNetUnfolder]: 3853/5458 cut-off events. [2023-08-30 18:45:18,246 INFO L131 PetriNetUnfolder]: For 392/392 co-relation queries the response was YES. [2023-08-30 18:45:18,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11824 conditions, 5458 events. 3853/5458 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 26177 event pairs, 744 based on Foata normal form. 1/4159 useless extension candidates. Maximal degree in co-relation 5912. Up to 2332 conditions per place. [2023-08-30 18:45:18,262 INFO L137 encePairwiseOnDemand]: 644/654 looper letters, 141 selfloop transitions, 11 changer transitions 8/160 dead transitions. [2023-08-30 18:45:18,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 160 transitions, 748 flow [2023-08-30 18:45:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:45:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:45:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2825 transitions. [2023-08-30 18:45:18,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319571865443425 [2023-08-30 18:45:18,268 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2825 transitions. [2023-08-30 18:45:18,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2825 transitions. [2023-08-30 18:45:18,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:18,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2825 transitions. [2023-08-30 18:45:18,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 282.5) internal successors, (2825), 10 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:18,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 654.0) internal successors, (7194), 11 states have internal predecessors, (7194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:18,282 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 654.0) internal successors, (7194), 11 states have internal predecessors, (7194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:18,282 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 117 flow. Second operand 10 states and 2825 transitions. [2023-08-30 18:45:18,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 160 transitions, 748 flow [2023-08-30 18:45:18,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 160 transitions, 739 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 18:45:18,285 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 196 flow [2023-08-30 18:45:18,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-08-30 18:45:18,286 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-08-30 18:45:18,286 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 196 flow [2023-08-30 18:45:18,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 270.8333333333333) internal successors, (1625), 6 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:18,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:18,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:18,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 18:45:18,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:18,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:45:18,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:18,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1072286339, now seen corresponding path program 1 times [2023-08-30 18:45:18,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:18,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766004300] [2023-08-30 18:45:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:18,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:18,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766004300] [2023-08-30 18:45:18,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766004300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:18,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604033297] [2023-08-30 18:45:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:18,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:18,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:45:18,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:45:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:18,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 18:45:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:18,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:19,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604033297] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:19,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:45:19,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-08-30 18:45:19,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342814333] [2023-08-30 18:45:19,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:19,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:45:19,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:19,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:45:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-08-30 18:45:19,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 654 [2023-08-30 18:45:19,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 269.42857142857144) internal successors, (1886), 7 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:19,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:19,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 654 [2023-08-30 18:45:19,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:19,965 INFO L130 PetriNetUnfolder]: 5619/8120 cut-off events. [2023-08-30 18:45:19,965 INFO L131 PetriNetUnfolder]: For 902/902 co-relation queries the response was YES. [2023-08-30 18:45:19,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18141 conditions, 8120 events. 5619/8120 cut-off events. For 902/902 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 42062 event pairs, 1656 based on Foata normal form. 0/6236 useless extension candidates. Maximal degree in co-relation 11716. Up to 2674 conditions per place. [2023-08-30 18:45:19,993 INFO L137 encePairwiseOnDemand]: 644/654 looper letters, 161 selfloop transitions, 17 changer transitions 2/180 dead transitions. [2023-08-30 18:45:19,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 180 transitions, 910 flow [2023-08-30 18:45:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:45:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:45:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2829 transitions. [2023-08-30 18:45:19,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325688073394495 [2023-08-30 18:45:19,999 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2829 transitions. [2023-08-30 18:45:19,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2829 transitions. [2023-08-30 18:45:20,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:20,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2829 transitions. [2023-08-30 18:45:20,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 282.9) internal successors, (2829), 10 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 654.0) internal successors, (7194), 11 states have internal predecessors, (7194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,012 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 654.0) internal successors, (7194), 11 states have internal predecessors, (7194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,012 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 196 flow. Second operand 10 states and 2829 transitions. [2023-08-30 18:45:20,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 180 transitions, 910 flow [2023-08-30 18:45:20,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 180 transitions, 909 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:45:20,016 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 266 flow [2023-08-30 18:45:20,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=266, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2023-08-30 18:45:20,017 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-08-30 18:45:20,017 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 266 flow [2023-08-30 18:45:20,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 269.42857142857144) internal successors, (1886), 7 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:20,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:20,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 18:45:20,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 18:45:20,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:45:20,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:20,224 INFO L85 PathProgramCache]: Analyzing trace with hash -885160629, now seen corresponding path program 1 times [2023-08-30 18:45:20,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:20,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813935245] [2023-08-30 18:45:20,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:45:20,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:20,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813935245] [2023-08-30 18:45:20,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813935245] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:45:20,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:45:20,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:45:20,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595104518] [2023-08-30 18:45:20,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:20,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:45:20,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:45:20,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:45:20,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 654 [2023-08-30 18:45:20,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:20,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 654 [2023-08-30 18:45:20,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:20,842 INFO L130 PetriNetUnfolder]: 3495/5132 cut-off events. [2023-08-30 18:45:20,842 INFO L131 PetriNetUnfolder]: For 1807/1807 co-relation queries the response was YES. [2023-08-30 18:45:20,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12286 conditions, 5132 events. 3495/5132 cut-off events. For 1807/1807 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24773 event pairs, 1802 based on Foata normal form. 0/4432 useless extension candidates. Maximal degree in co-relation 7166. Up to 3137 conditions per place. [2023-08-30 18:45:20,858 INFO L137 encePairwiseOnDemand]: 649/654 looper letters, 42 selfloop transitions, 4 changer transitions 51/97 dead transitions. [2023-08-30 18:45:20,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 572 flow [2023-08-30 18:45:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:45:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:45:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1454 transitions. [2023-08-30 18:45:20,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44464831804281346 [2023-08-30 18:45:20,862 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1454 transitions. [2023-08-30 18:45:20,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1454 transitions. [2023-08-30 18:45:20,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:20,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1454 transitions. [2023-08-30 18:45:20,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 654.0) internal successors, (3924), 6 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,868 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 654.0) internal successors, (3924), 6 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,869 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 266 flow. Second operand 5 states and 1454 transitions. [2023-08-30 18:45:20,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 572 flow [2023-08-30 18:45:20,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 558 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 18:45:20,875 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 195 flow [2023-08-30 18:45:20,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-08-30 18:45:20,876 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-08-30 18:45:20,876 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 195 flow [2023-08-30 18:45:20,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:20,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:20,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:20,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 18:45:20,878 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:45:20,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:20,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1196564902, now seen corresponding path program 1 times [2023-08-30 18:45:20,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:20,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320270578] [2023-08-30 18:45:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:20,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:20,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320270578] [2023-08-30 18:45:20,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320270578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:45:20,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:45:20,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:45:20,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521866570] [2023-08-30 18:45:20,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:20,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:45:20,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:45:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:45:21,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 654 [2023-08-30 18:45:21,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:21,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:21,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 654 [2023-08-30 18:45:21,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:21,317 INFO L130 PetriNetUnfolder]: 1573/2264 cut-off events. [2023-08-30 18:45:21,317 INFO L131 PetriNetUnfolder]: For 998/998 co-relation queries the response was YES. [2023-08-30 18:45:21,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5468 conditions, 2264 events. 1573/2264 cut-off events. For 998/998 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8876 event pairs, 882 based on Foata normal form. 50/2032 useless extension candidates. Maximal degree in co-relation 5448. Up to 1658 conditions per place. [2023-08-30 18:45:21,324 INFO L137 encePairwiseOnDemand]: 649/654 looper letters, 37 selfloop transitions, 2 changer transitions 44/83 dead transitions. [2023-08-30 18:45:21,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 83 transitions, 452 flow [2023-08-30 18:45:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:45:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:45:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1456 transitions. [2023-08-30 18:45:21,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452599388379205 [2023-08-30 18:45:21,327 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1456 transitions. [2023-08-30 18:45:21,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1456 transitions. [2023-08-30 18:45:21,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:21,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1456 transitions. [2023-08-30 18:45:21,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.2) internal successors, (1456), 5 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:21,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 654.0) internal successors, (3924), 6 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:21,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 654.0) internal successors, (3924), 6 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:21,334 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 195 flow. Second operand 5 states and 1456 transitions. [2023-08-30 18:45:21,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 83 transitions, 452 flow [2023-08-30 18:45:21,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 403 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-08-30 18:45:21,337 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 126 flow [2023-08-30 18:45:21,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-08-30 18:45:21,338 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-30 18:45:21,340 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 126 flow [2023-08-30 18:45:21,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:21,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:21,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:21,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 18:45:21,341 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:45:21,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1703835318, now seen corresponding path program 1 times [2023-08-30 18:45:21,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:21,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596018187] [2023-08-30 18:45:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:21,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:45:21,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:21,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596018187] [2023-08-30 18:45:21,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596018187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:21,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512388691] [2023-08-30 18:45:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:21,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:21,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:21,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:45:21,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 18:45:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:21,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 18:45:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:21,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:21,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512388691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:45:21,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:45:21,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2023-08-30 18:45:21,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104855592] [2023-08-30 18:45:21,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:45:21,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:45:21,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:45:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:45:22,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 654 [2023-08-30 18:45:22,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 126 flow. Second operand has 18 states, 18 states have (on average 263.3333333333333) internal successors, (4740), 18 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:22,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:22,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 654 [2023-08-30 18:45:22,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:24,171 INFO L130 PetriNetUnfolder]: 5562/8013 cut-off events. [2023-08-30 18:45:24,171 INFO L131 PetriNetUnfolder]: For 2569/2569 co-relation queries the response was YES. [2023-08-30 18:45:24,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18100 conditions, 8013 events. 5562/8013 cut-off events. For 2569/2569 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 40995 event pairs, 1689 based on Foata normal form. 6/6885 useless extension candidates. Maximal degree in co-relation 18083. Up to 1524 conditions per place. [2023-08-30 18:45:24,207 INFO L137 encePairwiseOnDemand]: 642/654 looper letters, 137 selfloop transitions, 16 changer transitions 163/316 dead transitions. [2023-08-30 18:45:24,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 316 transitions, 1483 flow [2023-08-30 18:45:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 18:45:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 18:45:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6817 transitions. [2023-08-30 18:45:24,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41694189602446485 [2023-08-30 18:45:24,271 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6817 transitions. [2023-08-30 18:45:24,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6817 transitions. [2023-08-30 18:45:24,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:24,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6817 transitions. [2023-08-30 18:45:24,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 272.68) internal successors, (6817), 25 states have internal predecessors, (6817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:24,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 654.0) internal successors, (17004), 26 states have internal predecessors, (17004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:24,307 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 654.0) internal successors, (17004), 26 states have internal predecessors, (17004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:24,308 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 126 flow. Second operand 25 states and 6817 transitions. [2023-08-30 18:45:24,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 316 transitions, 1483 flow [2023-08-30 18:45:24,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 316 transitions, 1444 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-30 18:45:24,311 INFO L231 Difference]: Finished difference. Result has 78 places, 52 transitions, 240 flow [2023-08-30 18:45:24,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=240, PETRI_PLACES=78, PETRI_TRANSITIONS=52} [2023-08-30 18:45:24,313 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 40 predicate places. [2023-08-30 18:45:24,313 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 52 transitions, 240 flow [2023-08-30 18:45:24,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 263.3333333333333) internal successors, (4740), 18 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:24,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:24,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:24,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 18:45:24,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:24,520 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:45:24,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1693095200, now seen corresponding path program 1 times [2023-08-30 18:45:24,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:24,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753016487] [2023-08-30 18:45:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:24,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:24,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:24,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753016487] [2023-08-30 18:45:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753016487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27053122] [2023-08-30 18:45:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:24,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:24,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:24,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:45:24,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 18:45:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:24,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 18:45:24,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:24,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:24,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27053122] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:24,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:45:24,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 14 [2023-08-30 18:45:24,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113419894] [2023-08-30 18:45:24,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:45:24,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:45:24,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:24,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:45:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:45:25,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 654 [2023-08-30 18:45:25,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 52 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 270.0) internal successors, (1890), 7 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:25,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:25,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 654 [2023-08-30 18:45:25,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:25,636 INFO L130 PetriNetUnfolder]: 4352/6331 cut-off events. [2023-08-30 18:45:25,636 INFO L131 PetriNetUnfolder]: For 13601/13601 co-relation queries the response was YES. [2023-08-30 18:45:25,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19251 conditions, 6331 events. 4352/6331 cut-off events. For 13601/13601 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 31465 event pairs, 1173 based on Foata normal form. 0/5874 useless extension candidates. Maximal degree in co-relation 16152. Up to 4090 conditions per place. [2023-08-30 18:45:25,671 INFO L137 encePairwiseOnDemand]: 646/654 looper letters, 65 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2023-08-30 18:45:25,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 505 flow [2023-08-30 18:45:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:45:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:45:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1921 transitions. [2023-08-30 18:45:25,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196155526430756 [2023-08-30 18:45:25,675 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1921 transitions. [2023-08-30 18:45:25,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1921 transitions. [2023-08-30 18:45:25,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:25,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1921 transitions. [2023-08-30 18:45:25,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 274.42857142857144) internal successors, (1921), 7 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:25,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 654.0) internal successors, (5232), 8 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:25,684 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 654.0) internal successors, (5232), 8 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:25,684 INFO L175 Difference]: Start difference. First operand has 78 places, 52 transitions, 240 flow. Second operand 7 states and 1921 transitions. [2023-08-30 18:45:25,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 505 flow [2023-08-30 18:45:25,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 451 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-08-30 18:45:25,713 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 240 flow [2023-08-30 18:45:25,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2023-08-30 18:45:25,713 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-08-30 18:45:25,713 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 240 flow [2023-08-30 18:45:25,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 270.0) internal successors, (1890), 7 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:25,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:25,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:25,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 18:45:25,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:25,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:45:25,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:25,920 INFO L85 PathProgramCache]: Analyzing trace with hash 975190112, now seen corresponding path program 1 times [2023-08-30 18:45:25,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:25,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731291576] [2023-08-30 18:45:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:25,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:45:26,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731291576] [2023-08-30 18:45:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731291576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038529262] [2023-08-30 18:45:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:26,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:26,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:45:26,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 18:45:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:26,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 18:45:26,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:45:26,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:45:26,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038529262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:45:26,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:45:26,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 18:45:26,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338745778] [2023-08-30 18:45:26,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:45:26,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 18:45:26,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:45:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 18:45:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:45:26,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 654 [2023-08-30 18:45:26,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 240 flow. Second operand has 14 states, 14 states have (on average 270.2857142857143) internal successors, (3784), 14 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:26,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:45:26,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 654 [2023-08-30 18:45:26,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:45:27,942 INFO L130 PetriNetUnfolder]: 10150/14755 cut-off events. [2023-08-30 18:45:27,942 INFO L131 PetriNetUnfolder]: For 13466/13466 co-relation queries the response was YES. [2023-08-30 18:45:27,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41872 conditions, 14755 events. 10150/14755 cut-off events. For 13466/13466 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 82381 event pairs, 4193 based on Foata normal form. 6/14759 useless extension candidates. Maximal degree in co-relation 29773. Up to 5684 conditions per place. [2023-08-30 18:45:27,996 INFO L137 encePairwiseOnDemand]: 645/654 looper letters, 167 selfloop transitions, 18 changer transitions 8/193 dead transitions. [2023-08-30 18:45:27,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 193 transitions, 1189 flow [2023-08-30 18:45:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:45:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:45:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3359 transitions. [2023-08-30 18:45:28,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42800713557594294 [2023-08-30 18:45:28,002 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3359 transitions. [2023-08-30 18:45:28,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3359 transitions. [2023-08-30 18:45:28,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:45:28,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3359 transitions. [2023-08-30 18:45:28,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 279.9166666666667) internal successors, (3359), 12 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:28,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 654.0) internal successors, (8502), 13 states have internal predecessors, (8502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:28,015 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 654.0) internal successors, (8502), 13 states have internal predecessors, (8502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:28,015 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 240 flow. Second operand 12 states and 3359 transitions. [2023-08-30 18:45:28,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 193 transitions, 1189 flow [2023-08-30 18:45:28,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 193 transitions, 1166 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 18:45:28,025 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 375 flow [2023-08-30 18:45:28,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=375, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2023-08-30 18:45:28,027 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 44 predicate places. [2023-08-30 18:45:28,027 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 375 flow [2023-08-30 18:45:28,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 270.2857142857143) internal successors, (3784), 14 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:45:28,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:45:28,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:45:28,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 18:45:28,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:28,234 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:45:28,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:45:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash 241561077, now seen corresponding path program 1 times [2023-08-30 18:45:28,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:45:28,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240941380] [2023-08-30 18:45:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:45:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:29,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:45:29,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240941380] [2023-08-30 18:45:29,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240941380] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:45:29,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171868044] [2023-08-30 18:45:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:45:29,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:45:29,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:45:29,163 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:45:29,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 18:45:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:45:29,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-30 18:45:29,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:45:29,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:45:29,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:29,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:29,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:45:30,079 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-08-30 18:45:30,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-08-30 18:45:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:45:30,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:45:31,091 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (let ((.cse2 (+ .cse10 c_~a1~0.offset)) (.cse4 (+ .cse10 c_~a2~0.offset))) (let ((.cse0 (forall ((v_ArrVal_427 (Array Int Int)) (~a1~0.base Int) (~a2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427))) (let ((.cse9 (select .cse8 ~a2~0.base))) (or (< (select (select .cse8 ~a1~0.base) .cse2) (+ (select .cse9 .cse4) 1)) (< (select .cse9 c_~a2~0.offset) (+ (select (select .cse8 c_~a3~0.base) c_~a3~0.offset) 1)))))))) (and (or (< 0 c_~n1~0) .cse0) (or .cse0 (< 0 c_~n3~0)) (forall ((v_ArrVal_427 (Array Int Int)) (~a2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427))) (let ((.cse3 (select .cse7 ~a2~0.base)) (.cse6 (select (select .cse7 c_~a3~0.base) c_~a3~0.offset))) (or (forall ((~a1~0.base Int)) (let ((.cse1 (select .cse7 ~a1~0.base))) (let ((.cse5 (select .cse1 c_~a1~0.offset))) (or (< (select .cse1 .cse2) (+ (select .cse3 .cse4) 1)) (< (+ .cse5 2147483648) .cse6) (< .cse6 .cse5) (= .cse5 .cse6))))) (< (select .cse3 c_~a2~0.offset) (+ .cse6 1)))))))))) is different from false [2023-08-30 18:45:31,280 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (let ((.cse3 (+ .cse10 c_~a1~0.offset)) (.cse5 (+ .cse10 c_~a2~0.offset))) (let ((.cse7 (forall ((v_ArrVal_427 (Array Int Int)) (v_ArrVal_426 (Array Int Int)) (~a1~0.base Int) (~a2~0.base Int)) (let ((.cse8 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_426) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427))) (let ((.cse9 (select .cse8 ~a2~0.base))) (or (< (select (select .cse8 ~a1~0.base) .cse3) (+ (select .cse9 .cse5) 1)) (< (select .cse9 c_~a2~0.offset) (+ (select (select .cse8 c_~a3~0.base) c_~a3~0.offset) 1)))))))) (and (forall ((v_ArrVal_427 (Array Int Int)) (v_ArrVal_426 (Array Int Int)) (~a2~0.base Int)) (let ((.cse6 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_426) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_427))) (let ((.cse4 (select .cse6 ~a2~0.base)) (.cse0 (select (select .cse6 c_~a3~0.base) c_~a3~0.offset))) (or (forall ((~a1~0.base Int)) (let ((.cse2 (select .cse6 ~a1~0.base))) (let ((.cse1 (select .cse2 c_~a1~0.offset))) (or (< .cse0 .cse1) (< (+ .cse1 2147483648) .cse0) (< (select .cse2 .cse3) (+ (select .cse4 .cse5) 1)) (= .cse1 .cse0))))) (< (select .cse4 c_~a2~0.offset) (+ .cse0 1)))))) (or .cse7 (< 0 c_~n3~0)) (or .cse7 (< 0 c_~n1~0)))))) is different from false [2023-08-30 18:45:31,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:31,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 75 [2023-08-30 18:45:31,539 INFO L321 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-08-30 18:45:31,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4971 treesize of output 4736 [2023-08-30 18:45:31,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:31,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2347 treesize of output 2115 [2023-08-30 18:45:31,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:31,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2091 treesize of output 1987 [2023-08-30 18:45:31,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:45:31,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1963 treesize of output 1923 [2023-08-30 18:46:40,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:40,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 75 [2023-08-30 18:46:40,253 INFO L321 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-08-30 18:46:40,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29931 treesize of output 28416 [2023-08-30 18:46:40,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:40,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2347 treesize of output 2115 [2023-08-30 18:46:40,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:40,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2091 treesize of output 2051 [2023-08-30 18:46:40,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:46:40,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2027 treesize of output 1923 [2023-08-30 18:48:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:48:52,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171868044] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:48:52,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:48:52,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 41 [2023-08-30 18:48:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310522370] [2023-08-30 18:48:52,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:48:52,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 18:48:52,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:48:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 18:48:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1423, Unknown=13, NotChecked=158, Total=1806 [2023-08-30 18:48:52,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 654 [2023-08-30 18:48:52,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 375 flow. Second operand has 43 states, 43 states have (on average 183.06976744186048) internal successors, (7872), 43 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:52,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:48:52,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 654 [2023-08-30 18:48:52,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:48:58,535 INFO L130 PetriNetUnfolder]: 22407/33056 cut-off events. [2023-08-30 18:48:58,536 INFO L131 PetriNetUnfolder]: For 23840/23840 co-relation queries the response was YES. [2023-08-30 18:48:58,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91731 conditions, 33056 events. 22407/33056 cut-off events. For 23840/23840 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 215167 event pairs, 5202 based on Foata normal form. 14/33070 useless extension candidates. Maximal degree in co-relation 65222. Up to 13419 conditions per place. [2023-08-30 18:48:58,740 INFO L137 encePairwiseOnDemand]: 635/654 looper letters, 214 selfloop transitions, 64 changer transitions 28/306 dead transitions. [2023-08-30 18:48:58,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 306 transitions, 1830 flow [2023-08-30 18:48:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 18:48:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 18:48:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5130 transitions. [2023-08-30 18:48:58,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.290519877675841 [2023-08-30 18:48:58,755 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5130 transitions. [2023-08-30 18:48:58,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5130 transitions. [2023-08-30 18:48:58,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:48:58,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5130 transitions. [2023-08-30 18:48:58,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 190.0) internal successors, (5130), 27 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:58,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 654.0) internal successors, (18312), 28 states have internal predecessors, (18312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:58,782 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 654.0) internal successors, (18312), 28 states have internal predecessors, (18312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:58,782 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 375 flow. Second operand 27 states and 5130 transitions. [2023-08-30 18:48:58,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 306 transitions, 1830 flow [2023-08-30 18:48:58,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 306 transitions, 1817 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 18:48:58,804 INFO L231 Difference]: Finished difference. Result has 122 places, 115 transitions, 845 flow [2023-08-30 18:48:58,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=845, PETRI_PLACES=122, PETRI_TRANSITIONS=115} [2023-08-30 18:48:58,805 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 84 predicate places. [2023-08-30 18:48:58,805 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 115 transitions, 845 flow [2023-08-30 18:48:58,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 183.06976744186048) internal successors, (7872), 43 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:58,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:48:58,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:48:58,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 18:48:59,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:59,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:48:59,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:48:59,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1846702689, now seen corresponding path program 2 times [2023-08-30 18:48:59,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:48:59,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608035062] [2023-08-30 18:48:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:48:59,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:48:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:48:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:48:59,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:48:59,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608035062] [2023-08-30 18:48:59,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608035062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:48:59,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168426373] [2023-08-30 18:48:59,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:48:59,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:59,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:48:59,821 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:48:59,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 18:48:59,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:48:59,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:48:59,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:48:59,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:49:00,516 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-08-30 18:49:00,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-08-30 18:49:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:49:00,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:49:00,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168426373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:49:00,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:49:00,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 28 [2023-08-30 18:49:00,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63403870] [2023-08-30 18:49:00,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:49:00,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 18:49:00,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:49:00,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 18:49:00,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2023-08-30 18:49:01,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 654 [2023-08-30 18:49:01,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 115 transitions, 845 flow. Second operand has 16 states, 16 states have (on average 249.9375) internal successors, (3999), 16 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:01,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:49:01,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 654 [2023-08-30 18:49:01,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:49:06,387 INFO L130 PetriNetUnfolder]: 27720/41392 cut-off events. [2023-08-30 18:49:06,387 INFO L131 PetriNetUnfolder]: For 150331/150331 co-relation queries the response was YES. [2023-08-30 18:49:06,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167274 conditions, 41392 events. 27720/41392 cut-off events. For 150331/150331 co-relation queries the response was YES. Maximal size of possible extension queue 1462. Compared 288638 event pairs, 7145 based on Foata normal form. 7/41399 useless extension candidates. Maximal degree in co-relation 166493. Up to 13495 conditions per place. [2023-08-30 18:49:06,688 INFO L137 encePairwiseOnDemand]: 637/654 looper letters, 227 selfloop transitions, 33 changer transitions 14/274 dead transitions. [2023-08-30 18:49:06,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 274 transitions, 2378 flow [2023-08-30 18:49:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:49:06,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:49:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3387 transitions. [2023-08-30 18:49:06,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39837685250529287 [2023-08-30 18:49:06,694 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3387 transitions. [2023-08-30 18:49:06,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3387 transitions. [2023-08-30 18:49:06,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:49:06,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3387 transitions. [2023-08-30 18:49:06,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 260.53846153846155) internal successors, (3387), 13 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:06,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 654.0) internal successors, (9156), 14 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:06,706 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 654.0) internal successors, (9156), 14 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:06,707 INFO L175 Difference]: Start difference. First operand has 122 places, 115 transitions, 845 flow. Second operand 13 states and 3387 transitions. [2023-08-30 18:49:06,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 274 transitions, 2378 flow [2023-08-30 18:49:07,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 274 transitions, 2222 flow, removed 68 selfloop flow, removed 9 redundant places. [2023-08-30 18:49:07,188 INFO L231 Difference]: Finished difference. Result has 130 places, 131 transitions, 1047 flow [2023-08-30 18:49:07,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1047, PETRI_PLACES=130, PETRI_TRANSITIONS=131} [2023-08-30 18:49:07,189 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 92 predicate places. [2023-08-30 18:49:07,189 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 131 transitions, 1047 flow [2023-08-30 18:49:07,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 249.9375) internal successors, (3999), 16 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:07,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:49:07,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:49:07,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 18:49:07,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:49:07,395 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:49:07,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:49:07,395 INFO L85 PathProgramCache]: Analyzing trace with hash 801462021, now seen corresponding path program 3 times [2023-08-30 18:49:07,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:49:07,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321886199] [2023-08-30 18:49:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:49:07,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:49:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:49:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:49:08,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:49:08,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321886199] [2023-08-30 18:49:08,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321886199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:49:08,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119531594] [2023-08-30 18:49:08,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:49:08,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:49:08,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:49:08,257 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:49:08,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 18:49:08,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 18:49:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:49:08,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 18:49:08,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:49:08,951 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-08-30 18:49:08,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-08-30 18:49:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:49:09,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:49:09,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119531594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:49:09,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:49:09,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 28 [2023-08-30 18:49:09,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424354091] [2023-08-30 18:49:09,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:49:09,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 18:49:09,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:49:09,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 18:49:09,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2023-08-30 18:49:09,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 654 [2023-08-30 18:49:09,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 131 transitions, 1047 flow. Second operand has 16 states, 16 states have (on average 249.9375) internal successors, (3999), 16 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:09,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:49:09,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 654 [2023-08-30 18:49:09,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:49:16,840 INFO L130 PetriNetUnfolder]: 37219/55811 cut-off events. [2023-08-30 18:49:16,840 INFO L131 PetriNetUnfolder]: For 288919/288919 co-relation queries the response was YES. [2023-08-30 18:49:17,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257529 conditions, 55811 events. 37219/55811 cut-off events. For 288919/288919 co-relation queries the response was YES. Maximal size of possible extension queue 2086. Compared 409290 event pairs, 10693 based on Foata normal form. 7/55818 useless extension candidates. Maximal degree in co-relation 256402. Up to 25171 conditions per place. [2023-08-30 18:49:17,331 INFO L137 encePairwiseOnDemand]: 639/654 looper letters, 266 selfloop transitions, 44 changer transitions 12/322 dead transitions. [2023-08-30 18:49:17,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 322 transitions, 3162 flow [2023-08-30 18:49:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:49:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:49:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3378 transitions. [2023-08-30 18:49:17,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39731827805222303 [2023-08-30 18:49:17,336 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3378 transitions. [2023-08-30 18:49:17,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3378 transitions. [2023-08-30 18:49:17,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:49:17,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3378 transitions. [2023-08-30 18:49:17,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 259.84615384615387) internal successors, (3378), 13 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:17,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 654.0) internal successors, (9156), 14 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:17,346 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 654.0) internal successors, (9156), 14 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:17,346 INFO L175 Difference]: Start difference. First operand has 130 places, 131 transitions, 1047 flow. Second operand 13 states and 3378 transitions. [2023-08-30 18:49:17,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 322 transitions, 3162 flow [2023-08-30 18:49:20,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 322 transitions, 3056 flow, removed 36 selfloop flow, removed 5 redundant places. [2023-08-30 18:49:20,919 INFO L231 Difference]: Finished difference. Result has 145 places, 157 transitions, 1429 flow [2023-08-30 18:49:20,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1429, PETRI_PLACES=145, PETRI_TRANSITIONS=157} [2023-08-30 18:49:20,921 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 107 predicate places. [2023-08-30 18:49:20,921 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 157 transitions, 1429 flow [2023-08-30 18:49:20,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 249.9375) internal successors, (3999), 16 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:20,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:49:20,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:49:20,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 18:49:21,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 18:49:21,127 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:49:21,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:49:21,127 INFO L85 PathProgramCache]: Analyzing trace with hash 785158062, now seen corresponding path program 1 times [2023-08-30 18:49:21,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:49:21,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230011023] [2023-08-30 18:49:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:49:21,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:49:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:49:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:49:21,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:49:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230011023] [2023-08-30 18:49:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230011023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:49:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297617062] [2023-08-30 18:49:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:49:21,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:49:21,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:49:21,766 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:49:21,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 18:49:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:49:21,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-30 18:49:21,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:49:22,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:49:22,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:49:22,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:49:22,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 18:49:22,796 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-08-30 18:49:22,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 64 [2023-08-30 18:49:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:49:22,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:49:23,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:49:23,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 73 [2023-08-30 18:49:23,843 INFO L321 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2023-08-30 18:49:23,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 9451 treesize of output 8964 [2023-08-30 18:49:24,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:49:24,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2219 treesize of output 2179 [2023-08-30 18:49:24,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:49:24,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2155 treesize of output 2051 [2023-08-30 18:49:24,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:49:24,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2027 treesize of output 1795 [2023-08-30 18:49:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:49:43,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297617062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:49:43,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:49:43,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 46 [2023-08-30 18:49:43,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454150802] [2023-08-30 18:49:43,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:49:43,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 18:49:43,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:49:43,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 18:49:43,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1849, Unknown=8, NotChecked=0, Total=2256 [2023-08-30 18:49:47,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 654 [2023-08-30 18:49:47,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 157 transitions, 1429 flow. Second operand has 48 states, 48 states have (on average 182.875) internal successors, (8778), 48 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:47,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:49:47,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 654 [2023-08-30 18:49:47,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:50:06,346 INFO L130 PetriNetUnfolder]: 45607/69348 cut-off events. [2023-08-30 18:50:06,347 INFO L131 PetriNetUnfolder]: For 443693/443693 co-relation queries the response was YES. [2023-08-30 18:50:07,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343103 conditions, 69348 events. 45607/69348 cut-off events. For 443693/443693 co-relation queries the response was YES. Maximal size of possible extension queue 2389. Compared 525509 event pairs, 12600 based on Foata normal form. 40/69388 useless extension candidates. Maximal degree in co-relation 341485. Up to 15983 conditions per place. [2023-08-30 18:50:07,344 INFO L137 encePairwiseOnDemand]: 634/654 looper letters, 1085 selfloop transitions, 231 changer transitions 108/1424 dead transitions. [2023-08-30 18:50:07,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1424 transitions, 13675 flow [2023-08-30 18:50:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-08-30 18:50:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-08-30 18:50:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 17488 transitions. [2023-08-30 18:50:07,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2938468259569177 [2023-08-30 18:50:07,358 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 17488 transitions. [2023-08-30 18:50:07,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 17488 transitions. [2023-08-30 18:50:07,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:50:07,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 17488 transitions. [2023-08-30 18:50:07,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 192.17582417582418) internal successors, (17488), 91 states have internal predecessors, (17488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:07,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 654.0) internal successors, (60168), 92 states have internal predecessors, (60168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:07,415 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 654.0) internal successors, (60168), 92 states have internal predecessors, (60168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:07,415 INFO L175 Difference]: Start difference. First operand has 145 places, 157 transitions, 1429 flow. Second operand 91 states and 17488 transitions. [2023-08-30 18:50:07,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1424 transitions, 13675 flow [2023-08-30 18:50:13,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1424 transitions, 12765 flow, removed 433 selfloop flow, removed 5 redundant places. [2023-08-30 18:50:13,979 INFO L231 Difference]: Finished difference. Result has 287 places, 354 transitions, 4125 flow [2023-08-30 18:50:13,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=4125, PETRI_PLACES=287, PETRI_TRANSITIONS=354} [2023-08-30 18:50:13,980 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 249 predicate places. [2023-08-30 18:50:13,980 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 354 transitions, 4125 flow [2023-08-30 18:50:13,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 182.875) internal successors, (8778), 48 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:50:13,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:50:13,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:50:13,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 18:50:14,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:50:14,186 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:50:14,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:50:14,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1816406924, now seen corresponding path program 2 times [2023-08-30 18:50:14,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:50:14,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567599419] [2023-08-30 18:50:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:50:14,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:50:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:50:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:50:14,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:50:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567599419] [2023-08-30 18:50:14,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567599419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:50:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193476080] [2023-08-30 18:50:14,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:50:14,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:50:14,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:50:14,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:50:14,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 18:50:15,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:50:15,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:50:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 18:50:15,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:50:15,486 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:50:15,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 45 [2023-08-30 18:50:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 18:50:15,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:50:16,673 INFO L321 Elim1Store]: treesize reduction 44, result has 93.0 percent of original size [2023-08-30 18:50:16,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 153 treesize of output 633 Killed by 15