./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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 ../sv-benchmarks/c/weaver/test-context1.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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:44:04,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:44:04,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:44:04,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:44:04,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:44:04,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:44:04,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:44:04,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:44:04,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:44:04,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:44:04,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:44:04,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:44:04,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:44:04,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:44:04,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:44:04,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:44:04,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:44:04,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:44:04,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:44:04,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:44:04,805 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:44:04,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:44:04,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:44:04,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:44:04,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:44:04,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:44:04,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:44:04,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:44:04,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:44:04,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:44:04,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:44:04,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:44:04,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:44:04,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:44:04,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:44:04,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:44:04,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:44:04,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:44:04,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:44:04,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:44:04,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:44:04,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:44:04,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:44:04,842 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:44:04,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:44:04,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:44:04,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:44:04,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:44:04,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:44:04,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:44:04,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:44:04,844 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:44:04,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:44:04,845 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:44:04,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:44:04,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:44:04,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:44:04,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:44:04,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:44:04,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:44:04,847 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:44:04,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:44:04,848 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:44:04,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:44:04,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:44:04,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:44:04,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:44:04,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:44:04,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:44:04,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:44:04,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:44:04,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:44:04,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:44:04,850 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:44:04,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:44:04,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:44:04,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2022-07-19 21:44:05,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:44:05,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:44:05,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:44:05,086 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:44:05,086 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:44:05,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2022-07-19 21:44:05,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc2660070/3b82385742ad47f2a09ab1dcf4f64c48/FLAG7ad8b01f5 [2022-07-19 21:44:05,474 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:44:05,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2022-07-19 21:44:05,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc2660070/3b82385742ad47f2a09ab1dcf4f64c48/FLAG7ad8b01f5 [2022-07-19 21:44:05,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc2660070/3b82385742ad47f2a09ab1dcf4f64c48 [2022-07-19 21:44:05,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:44:05,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:44:05,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:44:05,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:44:05,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:44:05,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102a399d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05, skipping insertion in model container [2022-07-19 21:44:05,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:44:05,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:44:05,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-07-19 21:44:05,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:44:05,737 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:44:05,767 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-07-19 21:44:05,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:44:05,784 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:44:05,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05 WrapperNode [2022-07-19 21:44:05,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:44:05,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:44:05,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:44:05,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:44:05,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,827 INFO L137 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2022-07-19 21:44:05,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:44:05,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:44:05,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:44:05,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:44:05,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:44:05,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:44:05,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:44:05,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:44:05,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (1/1) ... [2022-07-19 21:44:05,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:44:05,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:05,904 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) [2022-07-19 21:44:05,921 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 [2022-07-19 21:44:05,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:44:05,952 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:44:05,952 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:44:05,953 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:44:05,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:44:05,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:44:05,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:44:05,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:44:05,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:44:05,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:44:05,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:44:05,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:44:05,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:44:05,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:44:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:44:05,956 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:44:06,034 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:44:06,035 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:44:06,260 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:44:06,329 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:44:06,329 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:44:06,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:06 BoogieIcfgContainer [2022-07-19 21:44:06,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:44:06,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:44:06,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:44:06,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:44:06,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:44:05" (1/3) ... [2022-07-19 21:44:06,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9f27f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:06, skipping insertion in model container [2022-07-19 21:44:06,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:05" (2/3) ... [2022-07-19 21:44:06,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9f27f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:06, skipping insertion in model container [2022-07-19 21:44:06,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:06" (3/3) ... [2022-07-19 21:44:06,337 INFO L111 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-07-19 21:44:06,341 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:44:06,347 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:44:06,347 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:44:06,348 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:44:06,390 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:44:06,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2022-07-19 21:44:06,484 INFO L129 PetriNetUnfolder]: 9/114 cut-off events. [2022-07-19 21:44:06,484 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:44:06,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-07-19 21:44:06,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2022-07-19 21:44:06,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2022-07-19 21:44:06,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:44:06,518 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1776d444, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@317c45dc [2022-07-19 21:44:06,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:44:06,547 INFO L129 PetriNetUnfolder]: 9/104 cut-off events. [2022-07-19 21:44:06,547 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:44:06,548 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:06,548 INFO L200 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:44:06,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1304387571, now seen corresponding path program 1 times [2022-07-19 21:44:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:06,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656920606] [2022-07-19 21:44:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:06,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:06,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656920606] [2022-07-19 21:44:06,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656920606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:06,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:06,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:44:06,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650128146] [2022-07-19 21:44:06,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:06,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:44:06,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:44:06,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:44:06,761 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2022-07-19 21:44:06,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:06,766 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:06,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2022-07-19 21:44:06,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:06,820 INFO L129 PetriNetUnfolder]: 5/101 cut-off events. [2022-07-19 21:44:06,834 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:44:06,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 101 events. 5/101 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 8/103 useless extension candidates. Maximal degree in co-relation 79. Up to 9 conditions per place. [2022-07-19 21:44:06,837 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 6 selfloop transitions, 0 changer transitions 3/99 dead transitions. [2022-07-19 21:44:06,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 222 flow [2022-07-19 21:44:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:44:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:44:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2022-07-19 21:44:06,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9396551724137931 [2022-07-19 21:44:06,851 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2022-07-19 21:44:06,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2022-07-19 21:44:06,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:06,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2022-07-19 21:44:06,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:06,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:06,865 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:06,866 INFO L186 Difference]: Start difference. First operand has 103 places, 105 transitions, 222 flow. Second operand 2 states and 218 transitions. [2022-07-19 21:44:06,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 222 flow [2022-07-19 21:44:06,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:44:06,872 INFO L242 Difference]: Finished difference. Result has 100 places, 96 transitions, 196 flow [2022-07-19 21:44:06,874 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2022-07-19 21:44:06,877 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2022-07-19 21:44:06,878 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 196 flow [2022-07-19 21:44:06,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:06,878 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:06,878 INFO L200 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:44:06,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:44:06,879 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:06,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1254353798, now seen corresponding path program 1 times [2022-07-19 21:44:06,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:06,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799802294] [2022-07-19 21:44:06,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:06,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:07,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:07,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799802294] [2022-07-19 21:44:07,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799802294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:07,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:07,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:44:07,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858239612] [2022-07-19 21:44:07,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:07,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:07,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:07,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:07,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:44:07,067 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-07-19 21:44:07,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:07,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-07-19 21:44:07,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:07,124 INFO L129 PetriNetUnfolder]: 7/116 cut-off events. [2022-07-19 21:44:07,125 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:44:07,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 116 events. 7/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 148. Up to 15 conditions per place. [2022-07-19 21:44:07,126 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 21 selfloop transitions, 2 changer transitions 4/103 dead transitions. [2022-07-19 21:44:07,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 266 flow [2022-07-19 21:44:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:44:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:44:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 458 transitions. [2022-07-19 21:44:07,129 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7896551724137931 [2022-07-19 21:44:07,129 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 458 transitions. [2022-07-19 21:44:07,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 458 transitions. [2022-07-19 21:44:07,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:07,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 458 transitions. [2022-07-19 21:44:07,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,133 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,133 INFO L186 Difference]: Start difference. First operand has 100 places, 96 transitions, 196 flow. Second operand 5 states and 458 transitions. [2022-07-19 21:44:07,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 266 flow [2022-07-19 21:44:07,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:44:07,135 INFO L242 Difference]: Finished difference. Result has 104 places, 97 transitions, 212 flow [2022-07-19 21:44:07,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2022-07-19 21:44:07,136 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 1 predicate places. [2022-07-19 21:44:07,137 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 212 flow [2022-07-19 21:44:07,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,137 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:07,137 INFO L200 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:44:07,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:44:07,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2038904616, now seen corresponding path program 1 times [2022-07-19 21:44:07,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:07,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082739550] [2022-07-19 21:44:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:07,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:07,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:07,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082739550] [2022-07-19 21:44:07,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082739550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:07,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:07,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:44:07,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211284746] [2022-07-19 21:44:07,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:07,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:44:07,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:07,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:44:07,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:44:07,219 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-07-19 21:44:07,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:07,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-07-19 21:44:07,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:07,243 INFO L129 PetriNetUnfolder]: 8/138 cut-off events. [2022-07-19 21:44:07,243 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-07-19 21:44:07,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 138 events. 8/138 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 185 event pairs, 1 based on Foata normal form. 3/133 useless extension candidates. Maximal degree in co-relation 170. Up to 15 conditions per place. [2022-07-19 21:44:07,244 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 8 selfloop transitions, 2 changer transitions 2/101 dead transitions. [2022-07-19 21:44:07,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 247 flow [2022-07-19 21:44:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:44:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:44:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2022-07-19 21:44:07,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9137931034482759 [2022-07-19 21:44:07,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2022-07-19 21:44:07,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2022-07-19 21:44:07,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:07,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2022-07-19 21:44:07,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,248 INFO L186 Difference]: Start difference. First operand has 104 places, 97 transitions, 212 flow. Second operand 3 states and 318 transitions. [2022-07-19 21:44:07,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 247 flow [2022-07-19 21:44:07,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:44:07,251 INFO L242 Difference]: Finished difference. Result has 102 places, 98 transitions, 218 flow [2022-07-19 21:44:07,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2022-07-19 21:44:07,252 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2022-07-19 21:44:07,252 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 218 flow [2022-07-19 21:44:07,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,252 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:07,253 INFO L200 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, 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, 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] [2022-07-19 21:44:07,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:44:07,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:07,253 INFO L85 PathProgramCache]: Analyzing trace with hash 983157472, now seen corresponding path program 1 times [2022-07-19 21:44:07,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:07,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817107173] [2022-07-19 21:44:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:07,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:44:07,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:07,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817107173] [2022-07-19 21:44:07,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817107173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:07,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:07,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:44:07,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912285363] [2022-07-19 21:44:07,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:07,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:44:07,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:07,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:44:07,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:44:07,430 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 116 [2022-07-19 21:44:07,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:07,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 116 [2022-07-19 21:44:07,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:07,546 INFO L129 PetriNetUnfolder]: 8/184 cut-off events. [2022-07-19 21:44:07,547 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-19 21:44:07,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 184 events. 8/184 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 371 event pairs, 0 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 248. Up to 14 conditions per place. [2022-07-19 21:44:07,548 INFO L132 encePairwiseOnDemand]: 105/116 looper letters, 21 selfloop transitions, 10 changer transitions 8/113 dead transitions. [2022-07-19 21:44:07,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 337 flow [2022-07-19 21:44:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:44:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:44:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 823 transitions. [2022-07-19 21:44:07,551 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7883141762452107 [2022-07-19 21:44:07,552 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 823 transitions. [2022-07-19 21:44:07,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 823 transitions. [2022-07-19 21:44:07,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:07,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 823 transitions. [2022-07-19 21:44:07,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.44444444444444) internal successors, (823), 9 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,558 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,558 INFO L186 Difference]: Start difference. First operand has 102 places, 98 transitions, 218 flow. Second operand 9 states and 823 transitions. [2022-07-19 21:44:07,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 337 flow [2022-07-19 21:44:07,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:44:07,561 INFO L242 Difference]: Finished difference. Result has 110 places, 99 transitions, 244 flow [2022-07-19 21:44:07,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2022-07-19 21:44:07,562 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-07-19 21:44:07,567 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 244 flow [2022-07-19 21:44:07,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:07,568 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:07,569 INFO L200 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, 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, 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, 1, 1, 1] [2022-07-19 21:44:07,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:44:07,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:07,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:07,570 INFO L85 PathProgramCache]: Analyzing trace with hash -579711517, now seen corresponding path program 1 times [2022-07-19 21:44:07,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:07,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511154224] [2022-07-19 21:44:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:07,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:44:07,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511154224] [2022-07-19 21:44:07,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511154224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:07,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733905184] [2022-07-19 21:44:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:07,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:07,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:07,951 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) [2022-07-19 21:44:07,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:44:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:08,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 21:44:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:08,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-19 21:44:08,219 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:44:08,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 21:44:08,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-19 21:44:08,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 21:44:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:44:08,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:08,595 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_66 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_66) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-19 21:44:08,638 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:44:08,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 45 [2022-07-19 21:44:08,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-19 21:44:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-07-19 21:44:08,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733905184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:08,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:08,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 30 [2022-07-19 21:44:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441037807] [2022-07-19 21:44:08,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:08,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 21:44:08,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 21:44:08,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=698, Unknown=1, NotChecked=54, Total=870 [2022-07-19 21:44:08,957 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 116 [2022-07-19 21:44:08,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 244 flow. Second operand has 30 states, 30 states have (on average 58.7) internal successors, (1761), 30 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:08,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:08,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 116 [2022-07-19 21:44:08,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:09,379 INFO L129 PetriNetUnfolder]: 35/284 cut-off events. [2022-07-19 21:44:09,379 INFO L130 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-07-19 21:44:09,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 284 events. 35/284 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 975 event pairs, 2 based on Foata normal form. 1/265 useless extension candidates. Maximal degree in co-relation 485. Up to 47 conditions per place. [2022-07-19 21:44:09,381 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 48 selfloop transitions, 24 changer transitions 9/130 dead transitions. [2022-07-19 21:44:09,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 130 transitions, 507 flow [2022-07-19 21:44:09,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 21:44:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-19 21:44:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1181 transitions. [2022-07-19 21:44:09,384 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.509051724137931 [2022-07-19 21:44:09,384 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1181 transitions. [2022-07-19 21:44:09,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1181 transitions. [2022-07-19 21:44:09,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:09,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1181 transitions. [2022-07-19 21:44:09,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.05) internal successors, (1181), 20 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:09,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:09,390 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:09,390 INFO L186 Difference]: Start difference. First operand has 110 places, 99 transitions, 244 flow. Second operand 20 states and 1181 transitions. [2022-07-19 21:44:09,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 130 transitions, 507 flow [2022-07-19 21:44:09,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 130 transitions, 492 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-19 21:44:09,393 INFO L242 Difference]: Finished difference. Result has 128 places, 109 transitions, 361 flow [2022-07-19 21:44:09,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=361, PETRI_PLACES=128, PETRI_TRANSITIONS=109} [2022-07-19 21:44:09,393 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 25 predicate places. [2022-07-19 21:44:09,394 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 109 transitions, 361 flow [2022-07-19 21:44:09,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 58.7) internal successors, (1761), 30 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:09,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:09,395 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1] [2022-07-19 21:44:09,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:09,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:09,604 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1972578125, now seen corresponding path program 2 times [2022-07-19 21:44:09,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:09,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830141125] [2022-07-19 21:44:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:09,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:44:09,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:09,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830141125] [2022-07-19 21:44:09,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830141125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:09,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582102123] [2022-07-19 21:44:09,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:44:09,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:09,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:09,751 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) [2022-07-19 21:44:09,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:44:09,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:44:09,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:09,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:44:09,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:44:10,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:44:10,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582102123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:10,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:10,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-07-19 21:44:10,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491380372] [2022-07-19 21:44:10,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 21:44:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 21:44:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-07-19 21:44:10,379 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-07-19 21:44:10,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 109 transitions, 361 flow. Second operand has 28 states, 28 states have (on average 88.32142857142857) internal successors, (2473), 28 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:10,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:10,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-07-19 21:44:10,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:10,834 INFO L129 PetriNetUnfolder]: 38/411 cut-off events. [2022-07-19 21:44:10,834 INFO L130 PetriNetUnfolder]: For 344/361 co-relation queries the response was YES. [2022-07-19 21:44:10,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 411 events. 38/411 cut-off events. For 344/361 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1908 event pairs, 5 based on Foata normal form. 20/403 useless extension candidates. Maximal degree in co-relation 748. Up to 49 conditions per place. [2022-07-19 21:44:10,837 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 37 selfloop transitions, 23 changer transitions 6/141 dead transitions. [2022-07-19 21:44:10,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 141 transitions, 647 flow [2022-07-19 21:44:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 21:44:10,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-19 21:44:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1517 transitions. [2022-07-19 21:44:10,841 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7692697768762677 [2022-07-19 21:44:10,841 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1517 transitions. [2022-07-19 21:44:10,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1517 transitions. [2022-07-19 21:44:10,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:10,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1517 transitions. [2022-07-19 21:44:10,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.23529411764706) internal successors, (1517), 17 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:10,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:10,847 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:10,847 INFO L186 Difference]: Start difference. First operand has 128 places, 109 transitions, 361 flow. Second operand 17 states and 1517 transitions. [2022-07-19 21:44:10,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 141 transitions, 647 flow [2022-07-19 21:44:10,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 141 transitions, 594 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-07-19 21:44:10,854 INFO L242 Difference]: Finished difference. Result has 134 places, 118 transitions, 444 flow [2022-07-19 21:44:10,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=444, PETRI_PLACES=134, PETRI_TRANSITIONS=118} [2022-07-19 21:44:10,856 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 31 predicate places. [2022-07-19 21:44:10,856 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 444 flow [2022-07-19 21:44:10,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 88.32142857142857) internal successors, (2473), 28 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:10,857 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:10,857 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1] [2022-07-19 21:44:10,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:11,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 21:44:11,075 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1314716553, now seen corresponding path program 3 times [2022-07-19 21:44:11,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:11,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760801480] [2022-07-19 21:44:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:11,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:44:11,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:11,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760801480] [2022-07-19 21:44:11,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760801480] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:11,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128591720] [2022-07-19 21:44:11,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:44:11,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:11,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:11,124 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) [2022-07-19 21:44:11,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:44:11,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:44:11,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:11,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 21:44:11,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:11,545 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-19 21:44:11,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 10 [2022-07-19 21:44:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:44:11,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:11,694 INFO L356 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2022-07-19 21:44:11,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 19 [2022-07-19 21:44:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:44:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128591720] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:12,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:12,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 25 [2022-07-19 21:44:12,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230863698] [2022-07-19 21:44:12,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:12,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 21:44:12,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 21:44:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-07-19 21:44:12,167 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 116 [2022-07-19 21:44:12,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 118 transitions, 444 flow. Second operand has 25 states, 25 states have (on average 67.68) internal successors, (1692), 25 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:12,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:12,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 116 [2022-07-19 21:44:12,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:12,589 INFO L129 PetriNetUnfolder]: 58/547 cut-off events. [2022-07-19 21:44:12,589 INFO L130 PetriNetUnfolder]: For 709/725 co-relation queries the response was YES. [2022-07-19 21:44:12,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 547 events. 58/547 cut-off events. For 709/725 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2969 event pairs, 0 based on Foata normal form. 26/534 useless extension candidates. Maximal degree in co-relation 1110. Up to 69 conditions per place. [2022-07-19 21:44:12,591 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 67 selfloop transitions, 24 changer transitions 36/180 dead transitions. [2022-07-19 21:44:12,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 180 transitions, 955 flow [2022-07-19 21:44:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:44:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:44:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1439 transitions. [2022-07-19 21:44:12,595 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5907224958949097 [2022-07-19 21:44:12,595 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1439 transitions. [2022-07-19 21:44:12,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1439 transitions. [2022-07-19 21:44:12,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:12,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1439 transitions. [2022-07-19 21:44:12,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 68.52380952380952) internal successors, (1439), 21 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:12,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:12,602 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:12,602 INFO L186 Difference]: Start difference. First operand has 134 places, 118 transitions, 444 flow. Second operand 21 states and 1439 transitions. [2022-07-19 21:44:12,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 180 transitions, 955 flow [2022-07-19 21:44:12,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 180 transitions, 915 flow, removed 3 selfloop flow, removed 8 redundant places. [2022-07-19 21:44:12,606 INFO L242 Difference]: Finished difference. Result has 150 places, 115 transitions, 450 flow [2022-07-19 21:44:12,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=450, PETRI_PLACES=150, PETRI_TRANSITIONS=115} [2022-07-19 21:44:12,607 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 47 predicate places. [2022-07-19 21:44:12,607 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 115 transitions, 450 flow [2022-07-19 21:44:12,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 67.68) internal successors, (1692), 25 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:12,608 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:12,608 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-19 21:44:12,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:12,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:12,812 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1750804096, now seen corresponding path program 4 times [2022-07-19 21:44:12,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:12,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105599246] [2022-07-19 21:44:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:12,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:12,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:12,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105599246] [2022-07-19 21:44:12,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105599246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:12,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860909924] [2022-07-19 21:44:12,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:44:12,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:12,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:12,985 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) [2022-07-19 21:44:13,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:44:13,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:44:13,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:13,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 21:44:13,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:44:13,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-19 21:44:13,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 21:44:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:13,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:13,560 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_143 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_143) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2022-07-19 21:44:13,595 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:44:13,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 45 [2022-07-19 21:44:13,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-19 21:44:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 3 not checked. [2022-07-19 21:44:13,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860909924] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:13,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:13,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 30 [2022-07-19 21:44:13,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134606451] [2022-07-19 21:44:13,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:13,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 21:44:13,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:13,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 21:44:13,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2022-07-19 21:44:13,839 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2022-07-19 21:44:13,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 115 transitions, 450 flow. Second operand has 30 states, 30 states have (on average 64.06666666666666) internal successors, (1922), 30 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:13,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:13,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2022-07-19 21:44:13,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:14,195 INFO L129 PetriNetUnfolder]: 50/413 cut-off events. [2022-07-19 21:44:14,195 INFO L130 PetriNetUnfolder]: For 677/689 co-relation queries the response was YES. [2022-07-19 21:44:14,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 413 events. 50/413 cut-off events. For 677/689 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1828 event pairs, 2 based on Foata normal form. 10/394 useless extension candidates. Maximal degree in co-relation 950. Up to 78 conditions per place. [2022-07-19 21:44:14,198 INFO L132 encePairwiseOnDemand]: 97/116 looper letters, 47 selfloop transitions, 23 changer transitions 8/136 dead transitions. [2022-07-19 21:44:14,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 136 transitions, 719 flow [2022-07-19 21:44:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:44:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:44:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1169 transitions. [2022-07-19 21:44:14,200 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5598659003831418 [2022-07-19 21:44:14,201 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1169 transitions. [2022-07-19 21:44:14,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1169 transitions. [2022-07-19 21:44:14,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:14,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1169 transitions. [2022-07-19 21:44:14,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 64.94444444444444) internal successors, (1169), 18 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:14,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 116.0) internal successors, (2204), 19 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:14,206 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 116.0) internal successors, (2204), 19 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:14,206 INFO L186 Difference]: Start difference. First operand has 150 places, 115 transitions, 450 flow. Second operand 18 states and 1169 transitions. [2022-07-19 21:44:14,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 136 transitions, 719 flow [2022-07-19 21:44:14,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 136 transitions, 640 flow, removed 17 selfloop flow, removed 20 redundant places. [2022-07-19 21:44:14,209 INFO L242 Difference]: Finished difference. Result has 143 places, 119 transitions, 482 flow [2022-07-19 21:44:14,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=482, PETRI_PLACES=143, PETRI_TRANSITIONS=119} [2022-07-19 21:44:14,210 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 40 predicate places. [2022-07-19 21:44:14,210 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 119 transitions, 482 flow [2022-07-19 21:44:14,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 64.06666666666666) internal successors, (1922), 30 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:14,211 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:14,211 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-19 21:44:14,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:14,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:14,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:14,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:14,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1172145542, now seen corresponding path program 5 times [2022-07-19 21:44:14,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:14,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187252656] [2022-07-19 21:44:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:14,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:14,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:14,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187252656] [2022-07-19 21:44:14,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187252656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:14,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750381741] [2022-07-19 21:44:14,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:44:14,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:14,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:14,555 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) [2022-07-19 21:44:14,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:44:14,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:44:14,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 21:44:14,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:14,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 21:44:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:14,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:14,896 INFO L356 Elim1Store]: treesize reduction 14, result has 26.3 percent of original size [2022-07-19 21:44:14,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 13 [2022-07-19 21:44:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:14,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750381741] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:14,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:14,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7] total 15 [2022-07-19 21:44:14,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677031269] [2022-07-19 21:44:14,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:14,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 21:44:14,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:14,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 21:44:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:44:14,960 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2022-07-19 21:44:14,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 119 transitions, 482 flow. Second operand has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:14,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:14,961 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2022-07-19 21:44:14,961 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:15,184 INFO L129 PetriNetUnfolder]: 82/601 cut-off events. [2022-07-19 21:44:15,184 INFO L130 PetriNetUnfolder]: For 987/1002 co-relation queries the response was YES. [2022-07-19 21:44:15,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1426 conditions, 601 events. 82/601 cut-off events. For 987/1002 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3529 event pairs, 2 based on Foata normal form. 6/563 useless extension candidates. Maximal degree in co-relation 1407. Up to 107 conditions per place. [2022-07-19 21:44:15,189 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 64 selfloop transitions, 22 changer transitions 9/156 dead transitions. [2022-07-19 21:44:15,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 156 transitions, 924 flow [2022-07-19 21:44:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 21:44:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-19 21:44:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1192 transitions. [2022-07-19 21:44:15,194 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6044624746450304 [2022-07-19 21:44:15,194 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1192 transitions. [2022-07-19 21:44:15,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1192 transitions. [2022-07-19 21:44:15,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:15,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1192 transitions. [2022-07-19 21:44:15,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 70.11764705882354) internal successors, (1192), 17 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:15,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:15,200 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:15,200 INFO L186 Difference]: Start difference. First operand has 143 places, 119 transitions, 482 flow. Second operand 17 states and 1192 transitions. [2022-07-19 21:44:15,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 156 transitions, 924 flow [2022-07-19 21:44:15,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 156 transitions, 853 flow, removed 13 selfloop flow, removed 16 redundant places. [2022-07-19 21:44:15,205 INFO L242 Difference]: Finished difference. Result has 145 places, 126 transitions, 563 flow [2022-07-19 21:44:15,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=563, PETRI_PLACES=145, PETRI_TRANSITIONS=126} [2022-07-19 21:44:15,206 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 42 predicate places. [2022-07-19 21:44:15,206 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 126 transitions, 563 flow [2022-07-19 21:44:15,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:15,207 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:15,207 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-19 21:44:15,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:15,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:15,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2103614100, now seen corresponding path program 6 times [2022-07-19 21:44:15,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:15,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542820699] [2022-07-19 21:44:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:15,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:15,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542820699] [2022-07-19 21:44:15,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542820699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:15,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359640451] [2022-07-19 21:44:15,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:44:15,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:15,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:15,667 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) [2022-07-19 21:44:15,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:44:15,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 21:44:15,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 21:44:15,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:16,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:44:16,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-19 21:44:16,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 21:44:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:16,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:16,240 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_200 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-19 21:44:16,259 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:44:16,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 45 [2022-07-19 21:44:16,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-19 21:44:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:16,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359640451] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:16,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:16,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 32 [2022-07-19 21:44:16,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601753944] [2022-07-19 21:44:16,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:16,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 21:44:16,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 21:44:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=800, Unknown=1, NotChecked=58, Total=992 [2022-07-19 21:44:16,483 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 116 [2022-07-19 21:44:16,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 126 transitions, 563 flow. Second operand has 32 states, 32 states have (on average 57.53125) internal successors, (1841), 32 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:16,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:16,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 116 [2022-07-19 21:44:16,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:16,929 INFO L129 PetriNetUnfolder]: 121/791 cut-off events. [2022-07-19 21:44:16,929 INFO L130 PetriNetUnfolder]: For 1740/1761 co-relation queries the response was YES. [2022-07-19 21:44:16,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2029 conditions, 791 events. 121/791 cut-off events. For 1740/1761 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5371 event pairs, 6 based on Foata normal form. 13/749 useless extension candidates. Maximal degree in co-relation 2008. Up to 179 conditions per place. [2022-07-19 21:44:16,934 INFO L132 encePairwiseOnDemand]: 97/116 looper letters, 74 selfloop transitions, 39 changer transitions 8/173 dead transitions. [2022-07-19 21:44:16,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 173 transitions, 1192 flow [2022-07-19 21:44:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:44:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:44:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1218 transitions. [2022-07-19 21:44:16,936 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-07-19 21:44:16,936 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1218 transitions. [2022-07-19 21:44:16,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1218 transitions. [2022-07-19 21:44:16,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:16,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1218 transitions. [2022-07-19 21:44:16,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 58.0) internal successors, (1218), 21 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:16,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:16,941 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:16,941 INFO L186 Difference]: Start difference. First operand has 145 places, 126 transitions, 563 flow. Second operand 21 states and 1218 transitions. [2022-07-19 21:44:16,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 173 transitions, 1192 flow [2022-07-19 21:44:16,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 173 transitions, 1148 flow, removed 5 selfloop flow, removed 13 redundant places. [2022-07-19 21:44:16,947 INFO L242 Difference]: Finished difference. Result has 157 places, 147 transitions, 904 flow [2022-07-19 21:44:16,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=904, PETRI_PLACES=157, PETRI_TRANSITIONS=147} [2022-07-19 21:44:16,947 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 54 predicate places. [2022-07-19 21:44:16,947 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 147 transitions, 904 flow [2022-07-19 21:44:16,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 57.53125) internal successors, (1841), 32 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:16,948 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:16,948 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-19 21:44:16,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:17,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:17,163 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash -577211528, now seen corresponding path program 7 times [2022-07-19 21:44:17,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:17,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190717661] [2022-07-19 21:44:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:17,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:17,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:17,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190717661] [2022-07-19 21:44:17,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190717661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:17,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322749776] [2022-07-19 21:44:17,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:44:17,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:17,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:17,325 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) [2022-07-19 21:44:17,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:44:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:17,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 21:44:17,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:17,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-19 21:44:17,489 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:44:17,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 21:44:17,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-19 21:44:17,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 21:44:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:17,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:17,741 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_230 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_230) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-19 21:44:17,763 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:44:17,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 45 [2022-07-19 21:44:17,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-19 21:44:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 4 not checked. [2022-07-19 21:44:18,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322749776] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:18,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:18,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 25 [2022-07-19 21:44:18,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237909317] [2022-07-19 21:44:18,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:18,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 21:44:18,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:18,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 21:44:18,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=469, Unknown=1, NotChecked=44, Total=600 [2022-07-19 21:44:18,022 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 116 [2022-07-19 21:44:18,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 147 transitions, 904 flow. Second operand has 25 states, 25 states have (on average 60.76) internal successors, (1519), 25 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:18,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:18,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 116 [2022-07-19 21:44:18,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:18,377 INFO L129 PetriNetUnfolder]: 126/816 cut-off events. [2022-07-19 21:44:18,377 INFO L130 PetriNetUnfolder]: For 2588/2614 co-relation queries the response was YES. [2022-07-19 21:44:18,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 816 events. 126/816 cut-off events. For 2588/2614 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5634 event pairs, 6 based on Foata normal form. 13/772 useless extension candidates. Maximal degree in co-relation 2262. Up to 178 conditions per place. [2022-07-19 21:44:18,382 INFO L132 encePairwiseOnDemand]: 97/116 looper letters, 73 selfloop transitions, 38 changer transitions 8/174 dead transitions. [2022-07-19 21:44:18,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 174 transitions, 1349 flow [2022-07-19 21:44:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:44:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:44:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1100 transitions. [2022-07-19 21:44:18,384 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5268199233716475 [2022-07-19 21:44:18,385 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1100 transitions. [2022-07-19 21:44:18,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1100 transitions. [2022-07-19 21:44:18,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:18,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1100 transitions. [2022-07-19 21:44:18,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.111111111111114) internal successors, (1100), 18 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:18,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 116.0) internal successors, (2204), 19 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:18,389 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 116.0) internal successors, (2204), 19 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:18,389 INFO L186 Difference]: Start difference. First operand has 157 places, 147 transitions, 904 flow. Second operand 18 states and 1100 transitions. [2022-07-19 21:44:18,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 174 transitions, 1349 flow [2022-07-19 21:44:18,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 174 transitions, 1299 flow, removed 11 selfloop flow, removed 14 redundant places. [2022-07-19 21:44:18,395 INFO L242 Difference]: Finished difference. Result has 162 places, 151 transitions, 1028 flow [2022-07-19 21:44:18,395 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1028, PETRI_PLACES=162, PETRI_TRANSITIONS=151} [2022-07-19 21:44:18,396 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 59 predicate places. [2022-07-19 21:44:18,396 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 151 transitions, 1028 flow [2022-07-19 21:44:18,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 60.76) internal successors, (1519), 25 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:18,397 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:18,397 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-19 21:44:18,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:18,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:18,610 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:18,611 INFO L85 PathProgramCache]: Analyzing trace with hash -355345664, now seen corresponding path program 8 times [2022-07-19 21:44:18,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:18,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567802730] [2022-07-19 21:44:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:18,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:18,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567802730] [2022-07-19 21:44:18,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567802730] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781526390] [2022-07-19 21:44:18,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:44:18,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:18,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:18,791 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) [2022-07-19 21:44:18,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:44:18,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:44:18,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:18,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:44:18,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:19,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:19,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781526390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:19,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:19,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-07-19 21:44:19,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562558062] [2022-07-19 21:44:19,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:19,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 21:44:19,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:19,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 21:44:19,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1229, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 21:44:19,557 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-07-19 21:44:19,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 151 transitions, 1028 flow. Second operand has 40 states, 40 states have (on average 88.125) internal successors, (3525), 40 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:19,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:19,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-07-19 21:44:19,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:20,266 INFO L129 PetriNetUnfolder]: 142/1302 cut-off events. [2022-07-19 21:44:20,267 INFO L130 PetriNetUnfolder]: For 4666/4719 co-relation queries the response was YES. [2022-07-19 21:44:20,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3372 conditions, 1302 events. 142/1302 cut-off events. For 4666/4719 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 11090 event pairs, 7 based on Foata normal form. 46/1247 useless extension candidates. Maximal degree in co-relation 3343. Up to 178 conditions per place. [2022-07-19 21:44:20,273 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 65 selfloop transitions, 62 changer transitions 12/219 dead transitions. [2022-07-19 21:44:20,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 219 transitions, 1991 flow [2022-07-19 21:44:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:44:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:44:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2140 transitions. [2022-07-19 21:44:20,277 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7686781609195402 [2022-07-19 21:44:20,277 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2140 transitions. [2022-07-19 21:44:20,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2140 transitions. [2022-07-19 21:44:20,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:20,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2140 transitions. [2022-07-19 21:44:20,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 89.16666666666667) internal successors, (2140), 24 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:20,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 116.0) internal successors, (2900), 25 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:20,283 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 116.0) internal successors, (2900), 25 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:20,283 INFO L186 Difference]: Start difference. First operand has 162 places, 151 transitions, 1028 flow. Second operand 24 states and 2140 transitions. [2022-07-19 21:44:20,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 219 transitions, 1991 flow [2022-07-19 21:44:20,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 219 transitions, 1926 flow, removed 3 selfloop flow, removed 15 redundant places. [2022-07-19 21:44:20,294 INFO L242 Difference]: Finished difference. Result has 178 places, 187 transitions, 1728 flow [2022-07-19 21:44:20,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1728, PETRI_PLACES=178, PETRI_TRANSITIONS=187} [2022-07-19 21:44:20,296 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 75 predicate places. [2022-07-19 21:44:20,296 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 187 transitions, 1728 flow [2022-07-19 21:44:20,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.125) internal successors, (3525), 40 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:20,297 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:20,297 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-19 21:44:20,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:20,516 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,SelfDestructingSolverStorable11 [2022-07-19 21:44:20,516 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:20,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1219465690, now seen corresponding path program 9 times [2022-07-19 21:44:20,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:20,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527575578] [2022-07-19 21:44:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:20,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:20,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:20,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527575578] [2022-07-19 21:44:20,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527575578] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:20,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321663269] [2022-07-19 21:44:20,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:44:20,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:20,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:20,719 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) [2022-07-19 21:44:20,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:44:20,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:44:20,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:20,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 21:44:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:21,312 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 21:44:21,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 10 [2022-07-19 21:44:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:21,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:21,455 INFO L356 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2022-07-19 21:44:21,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 19 [2022-07-19 21:44:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:22,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321663269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:22,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:22,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 41 [2022-07-19 21:44:22,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321851276] [2022-07-19 21:44:22,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:22,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 21:44:22,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 21:44:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 21:44:22,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 116 [2022-07-19 21:44:22,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 187 transitions, 1728 flow. Second operand has 41 states, 41 states have (on average 59.5609756097561) internal successors, (2442), 41 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:22,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:22,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 116 [2022-07-19 21:44:22,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:26,011 INFO L129 PetriNetUnfolder]: 238/1962 cut-off events. [2022-07-19 21:44:26,011 INFO L130 PetriNetUnfolder]: For 10171/10228 co-relation queries the response was YES. [2022-07-19 21:44:26,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5778 conditions, 1962 events. 238/1962 cut-off events. For 10171/10228 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18816 event pairs, 4 based on Foata normal form. 28/1835 useless extension candidates. Maximal degree in co-relation 5741. Up to 238 conditions per place. [2022-07-19 21:44:26,024 INFO L132 encePairwiseOnDemand]: 86/116 looper letters, 182 selfloop transitions, 129 changer transitions 61/418 dead transitions. [2022-07-19 21:44:26,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 418 transitions, 4399 flow [2022-07-19 21:44:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-19 21:44:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-07-19 21:44:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4426 transitions. [2022-07-19 21:44:26,029 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5156104380242311 [2022-07-19 21:44:26,029 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4426 transitions. [2022-07-19 21:44:26,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4426 transitions. [2022-07-19 21:44:26,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:26,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4426 transitions. [2022-07-19 21:44:26,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 59.810810810810814) internal successors, (4426), 74 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:26,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 116.0) internal successors, (8700), 75 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:26,043 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 116.0) internal successors, (8700), 75 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:26,043 INFO L186 Difference]: Start difference. First operand has 178 places, 187 transitions, 1728 flow. Second operand 74 states and 4426 transitions. [2022-07-19 21:44:26,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 418 transitions, 4399 flow [2022-07-19 21:44:26,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 418 transitions, 4280 flow, removed 50 selfloop flow, removed 9 redundant places. [2022-07-19 21:44:26,067 INFO L242 Difference]: Finished difference. Result has 267 places, 244 transitions, 2776 flow [2022-07-19 21:44:26,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=2776, PETRI_PLACES=267, PETRI_TRANSITIONS=244} [2022-07-19 21:44:26,068 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 164 predicate places. [2022-07-19 21:44:26,068 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 244 transitions, 2776 flow [2022-07-19 21:44:26,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 59.5609756097561) internal successors, (2442), 41 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:26,069 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:26,069 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-19 21:44:26,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:26,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 21:44:26,283 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1148546546, now seen corresponding path program 10 times [2022-07-19 21:44:26,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:26,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757467889] [2022-07-19 21:44:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:26,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:26,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757467889] [2022-07-19 21:44:26,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757467889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052119502] [2022-07-19 21:44:26,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:44:26,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:26,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:26,447 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) [2022-07-19 21:44:26,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:44:26,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:44:26,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:26,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:44:26,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:26,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 21:44:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:44:26,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:26,800 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-19 21:44:26,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 13 [2022-07-19 21:44:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:26,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052119502] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:26,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:26,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 24 [2022-07-19 21:44:26,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590445833] [2022-07-19 21:44:26,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:26,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 21:44:26,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 21:44:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-07-19 21:44:26,920 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-07-19 21:44:26,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 244 transitions, 2776 flow. Second operand has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:26,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:26,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-07-19 21:44:26,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:27,779 INFO L129 PetriNetUnfolder]: 243/1963 cut-off events. [2022-07-19 21:44:27,779 INFO L130 PetriNetUnfolder]: For 16872/16952 co-relation queries the response was YES. [2022-07-19 21:44:27,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 1963 events. 243/1963 cut-off events. For 16872/16952 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18538 event pairs, 2 based on Foata normal form. 32/1840 useless extension candidates. Maximal degree in co-relation 7296. Up to 262 conditions per place. [2022-07-19 21:44:27,792 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 133 selfloop transitions, 110 changer transitions 63/356 dead transitions. [2022-07-19 21:44:27,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 356 transitions, 4907 flow [2022-07-19 21:44:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 21:44:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-19 21:44:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2572 transitions. [2022-07-19 21:44:27,801 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5543103448275862 [2022-07-19 21:44:27,801 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2572 transitions. [2022-07-19 21:44:27,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2572 transitions. [2022-07-19 21:44:27,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:27,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2572 transitions. [2022-07-19 21:44:27,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 64.3) internal successors, (2572), 40 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:27,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 116.0) internal successors, (4756), 41 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:27,819 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 116.0) internal successors, (4756), 41 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:27,819 INFO L186 Difference]: Start difference. First operand has 267 places, 244 transitions, 2776 flow. Second operand 40 states and 2572 transitions. [2022-07-19 21:44:27,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 356 transitions, 4907 flow [2022-07-19 21:44:27,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 356 transitions, 4537 flow, removed 130 selfloop flow, removed 36 redundant places. [2022-07-19 21:44:27,861 INFO L242 Difference]: Finished difference. Result has 275 places, 236 transitions, 2682 flow [2022-07-19 21:44:27,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2682, PETRI_PLACES=275, PETRI_TRANSITIONS=236} [2022-07-19 21:44:27,862 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 172 predicate places. [2022-07-19 21:44:27,862 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 236 transitions, 2682 flow [2022-07-19 21:44:27,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:27,862 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:27,863 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-19 21:44:27,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:28,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 21:44:28,079 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1783822456, now seen corresponding path program 11 times [2022-07-19 21:44:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:28,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272068941] [2022-07-19 21:44:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:28,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:28,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272068941] [2022-07-19 21:44:28,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272068941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:28,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556086133] [2022-07-19 21:44:28,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:44:28,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:28,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:28,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:44:28,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:44:28,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:44:28,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:28,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 21:44:28,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:28,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-07-19 21:44:28,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-19 21:44:28,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:44:28,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-19 21:44:29,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 21:44:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:29,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:29,083 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-07-19 21:44:29,164 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int)) (v_ArrVal_345 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_345)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select (select .cse0 c_~queue~0.base) (+ (* c_~size~0 4) c_~queue~0.offset .cse1 4)))) (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) c_~queue~0.base) (+ c_~queue~0.offset .cse1 4)))))) is different from false [2022-07-19 21:44:29,194 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int)) (v_ArrVal_345 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_345)) (.cse1 (* c_~front~0 4))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ .cse1 |c_ULTIMATE.start_main_#t~ret9#1.offset| 4))) (not (= (select (select .cse0 |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_main_#t~ret9#1.offset| 4)) 5))))) is different from false [2022-07-19 21:44:29,205 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int)) (v_ArrVal_345 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_345)) (.cse1 (* c_~front~0 4))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4))) (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 5))))) is different from false [2022-07-19 21:44:29,212 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int)) (v_ArrVal_345 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_345)) (.cse1 (* c_~front~0 4))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (not (= 5 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~size~0 4) .cse1 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) is different from false [2022-07-19 21:44:29,238 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:44:29,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 50 [2022-07-19 21:44:29,246 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:44:29,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 112 [2022-07-19 21:44:29,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-07-19 21:44:29,256 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:44:29,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 60 [2022-07-19 21:44:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2022-07-19 21:44:29,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556086133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:29,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:29,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 18] total 44 [2022-07-19 21:44:29,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094802019] [2022-07-19 21:44:29,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:29,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 21:44:29,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:29,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 21:44:29,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1321, Unknown=5, NotChecked=390, Total=1892 [2022-07-19 21:44:29,485 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 116 [2022-07-19 21:44:29,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 236 transitions, 2682 flow. Second operand has 44 states, 44 states have (on average 56.06818181818182) internal successors, (2467), 44 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:29,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:29,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 116 [2022-07-19 21:44:29,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:30,930 INFO L129 PetriNetUnfolder]: 261/2021 cut-off events. [2022-07-19 21:44:30,930 INFO L130 PetriNetUnfolder]: For 18029/18086 co-relation queries the response was YES. [2022-07-19 21:44:30,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7494 conditions, 2021 events. 261/2021 cut-off events. For 18029/18086 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 18897 event pairs, 0 based on Foata normal form. 21/1870 useless extension candidates. Maximal degree in co-relation 7425. Up to 274 conditions per place. [2022-07-19 21:44:30,951 INFO L132 encePairwiseOnDemand]: 95/116 looper letters, 105 selfloop transitions, 118 changer transitions 19/289 dead transitions. [2022-07-19 21:44:30,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 289 transitions, 3926 flow [2022-07-19 21:44:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 21:44:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-19 21:44:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1594 transitions. [2022-07-19 21:44:30,953 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4907635467980296 [2022-07-19 21:44:30,953 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1594 transitions. [2022-07-19 21:44:30,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1594 transitions. [2022-07-19 21:44:30,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:30,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1594 transitions. [2022-07-19 21:44:30,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 56.92857142857143) internal successors, (1594), 28 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:30,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 116.0) internal successors, (3364), 29 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:30,959 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 116.0) internal successors, (3364), 29 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:30,959 INFO L186 Difference]: Start difference. First operand has 275 places, 236 transitions, 2682 flow. Second operand 28 states and 1594 transitions. [2022-07-19 21:44:30,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 289 transitions, 3926 flow [2022-07-19 21:44:31,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 289 transitions, 3464 flow, removed 123 selfloop flow, removed 37 redundant places. [2022-07-19 21:44:31,006 INFO L242 Difference]: Finished difference. Result has 255 places, 244 transitions, 2845 flow [2022-07-19 21:44:31,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2845, PETRI_PLACES=255, PETRI_TRANSITIONS=244} [2022-07-19 21:44:31,007 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 152 predicate places. [2022-07-19 21:44:31,007 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 244 transitions, 2845 flow [2022-07-19 21:44:31,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 56.06818181818182) internal successors, (2467), 44 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:31,008 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:31,008 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-19 21:44:31,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:44:31,219 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash 572037068, now seen corresponding path program 12 times [2022-07-19 21:44:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:31,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663433316] [2022-07-19 21:44:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:31,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:31,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:31,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663433316] [2022-07-19 21:44:31,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663433316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:31,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650446202] [2022-07-19 21:44:31,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:44:31,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:31,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:31,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:44:31,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:44:31,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 21:44:31,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:31,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:44:31,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:44:31,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:44:31,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650446202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:31,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:31,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 14] total 23 [2022-07-19 21:44:31,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446732424] [2022-07-19 21:44:31,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:31,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:44:31,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:31,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:44:31,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:44:31,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-07-19 21:44:31,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 244 transitions, 2845 flow. Second operand has 23 states, 23 states have (on average 89.21739130434783) internal successors, (2052), 23 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:31,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:31,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-07-19 21:44:31,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:32,535 INFO L129 PetriNetUnfolder]: 341/2651 cut-off events. [2022-07-19 21:44:32,536 INFO L130 PetriNetUnfolder]: For 25221/25311 co-relation queries the response was YES. [2022-07-19 21:44:32,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10003 conditions, 2651 events. 341/2651 cut-off events. For 25221/25311 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 26735 event pairs, 49 based on Foata normal form. 61/2505 useless extension candidates. Maximal degree in co-relation 9941. Up to 427 conditions per place. [2022-07-19 21:44:32,559 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 81 selfloop transitions, 90 changer transitions 66/318 dead transitions. [2022-07-19 21:44:32,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 318 transitions, 4562 flow [2022-07-19 21:44:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:44:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:44:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1874 transitions. [2022-07-19 21:44:32,562 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7692939244663383 [2022-07-19 21:44:32,562 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1874 transitions. [2022-07-19 21:44:32,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1874 transitions. [2022-07-19 21:44:32,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:32,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1874 transitions. [2022-07-19 21:44:32,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.23809523809524) internal successors, (1874), 21 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:32,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:32,566 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:32,567 INFO L186 Difference]: Start difference. First operand has 255 places, 244 transitions, 2845 flow. Second operand 21 states and 1874 transitions. [2022-07-19 21:44:32,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 318 transitions, 4562 flow [2022-07-19 21:44:32,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 318 transitions, 4315 flow, removed 73 selfloop flow, removed 24 redundant places. [2022-07-19 21:44:32,647 INFO L242 Difference]: Finished difference. Result has 249 places, 238 transitions, 3194 flow [2022-07-19 21:44:32,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3194, PETRI_PLACES=249, PETRI_TRANSITIONS=238} [2022-07-19 21:44:32,648 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 146 predicate places. [2022-07-19 21:44:32,648 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 238 transitions, 3194 flow [2022-07-19 21:44:32,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 89.21739130434783) internal successors, (2052), 23 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:32,649 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:32,649 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:44:32,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:32,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 21:44:32,863 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:32,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash -271930735, now seen corresponding path program 13 times [2022-07-19 21:44:32,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:32,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845992668] [2022-07-19 21:44:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:32,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:33,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:33,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845992668] [2022-07-19 21:44:33,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845992668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:33,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007063764] [2022-07-19 21:44:33,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:44:33,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:33,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:33,178 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:44:33,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:44:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:33,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 21:44:33,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:33,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 21:44:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:44:33,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:33,644 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-19 21:44:33,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 13 [2022-07-19 21:44:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:44:33,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007063764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:33,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:33,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 11] total 33 [2022-07-19 21:44:33,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941165446] [2022-07-19 21:44:33,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:33,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:44:33,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:33,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:44:33,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:44:33,805 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-07-19 21:44:33,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 238 transitions, 3194 flow. Second operand has 33 states, 33 states have (on average 63.81818181818182) internal successors, (2106), 33 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:33,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:33,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-07-19 21:44:33,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:35,722 INFO L129 PetriNetUnfolder]: 608/3656 cut-off events. [2022-07-19 21:44:35,722 INFO L130 PetriNetUnfolder]: For 42310/42364 co-relation queries the response was YES. [2022-07-19 21:44:35,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15802 conditions, 3656 events. 608/3656 cut-off events. For 42310/42364 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 39134 event pairs, 4 based on Foata normal form. 40/3401 useless extension candidates. Maximal degree in co-relation 15741. Up to 775 conditions per place. [2022-07-19 21:44:35,754 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 177 selfloop transitions, 196 changer transitions 107/530 dead transitions. [2022-07-19 21:44:35,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 530 transitions, 8316 flow [2022-07-19 21:44:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-19 21:44:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-07-19 21:44:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5142 transitions. [2022-07-19 21:44:35,759 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5540948275862069 [2022-07-19 21:44:35,759 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5142 transitions. [2022-07-19 21:44:35,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5142 transitions. [2022-07-19 21:44:35,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:35,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5142 transitions. [2022-07-19 21:44:35,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 64.275) internal successors, (5142), 80 states have internal predecessors, (5142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:35,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:35,772 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:35,772 INFO L186 Difference]: Start difference. First operand has 249 places, 238 transitions, 3194 flow. Second operand 80 states and 5142 transitions. [2022-07-19 21:44:35,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 530 transitions, 8316 flow [2022-07-19 21:44:35,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 530 transitions, 6836 flow, removed 691 selfloop flow, removed 30 redundant places. [2022-07-19 21:44:35,894 INFO L242 Difference]: Finished difference. Result has 311 places, 304 transitions, 4730 flow [2022-07-19 21:44:35,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=2826, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=4730, PETRI_PLACES=311, PETRI_TRANSITIONS=304} [2022-07-19 21:44:35,894 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 208 predicate places. [2022-07-19 21:44:35,894 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 304 transitions, 4730 flow [2022-07-19 21:44:35,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 63.81818181818182) internal successors, (2106), 33 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:35,895 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:35,895 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:44:35,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-19 21:44:36,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:44:36,096 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:36,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1191970251, now seen corresponding path program 14 times [2022-07-19 21:44:36,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:36,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611865726] [2022-07-19 21:44:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:36,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:36,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:36,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611865726] [2022-07-19 21:44:36,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611865726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:36,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086201892] [2022-07-19 21:44:36,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:44:36,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:36,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:36,494 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:44:36,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:44:36,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:44:36,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:36,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 21:44:36,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:44:37,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-19 21:44:37,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 21:44:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:44:37,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:37,215 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_439 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_439) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2022-07-19 21:44:37,228 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:44:37,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-07-19 21:44:37,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 7 [2022-07-19 21:44:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:44:37,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086201892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:37,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:37,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 18] total 49 [2022-07-19 21:44:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126645544] [2022-07-19 21:44:37,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:37,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 21:44:37,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 21:44:37,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2069, Unknown=1, NotChecked=92, Total=2352 [2022-07-19 21:44:37,596 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 116 [2022-07-19 21:44:37,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 304 transitions, 4730 flow. Second operand has 49 states, 49 states have (on average 51.10204081632653) internal successors, (2504), 49 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:37,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:37,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 116 [2022-07-19 21:44:37,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:39,753 INFO L129 PetriNetUnfolder]: 747/4140 cut-off events. [2022-07-19 21:44:39,753 INFO L130 PetriNetUnfolder]: For 38475/38603 co-relation queries the response was YES. [2022-07-19 21:44:39,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16054 conditions, 4140 events. 747/4140 cut-off events. For 38475/38603 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 45490 event pairs, 0 based on Foata normal form. 47/3842 useless extension candidates. Maximal degree in co-relation 15970. Up to 923 conditions per place. [2022-07-19 21:44:39,788 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 122 selfloop transitions, 246 changer transitions 38/447 dead transitions. [2022-07-19 21:44:39,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 447 transitions, 7309 flow [2022-07-19 21:44:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 21:44:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-19 21:44:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2161 transitions. [2022-07-19 21:44:39,790 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4543734230445753 [2022-07-19 21:44:39,790 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2161 transitions. [2022-07-19 21:44:39,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2161 transitions. [2022-07-19 21:44:39,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:39,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2161 transitions. [2022-07-19 21:44:39,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.707317073170735) internal successors, (2161), 41 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:39,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 116.0) internal successors, (4872), 42 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:39,796 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 116.0) internal successors, (4872), 42 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:39,797 INFO L186 Difference]: Start difference. First operand has 311 places, 304 transitions, 4730 flow. Second operand 41 states and 2161 transitions. [2022-07-19 21:44:39,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 447 transitions, 7309 flow [2022-07-19 21:44:39,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 447 transitions, 6489 flow, removed 237 selfloop flow, removed 53 redundant places. [2022-07-19 21:44:39,875 INFO L242 Difference]: Finished difference. Result has 279 places, 349 transitions, 5477 flow [2022-07-19 21:44:39,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4034, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5477, PETRI_PLACES=279, PETRI_TRANSITIONS=349} [2022-07-19 21:44:39,876 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 176 predicate places. [2022-07-19 21:44:39,876 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 349 transitions, 5477 flow [2022-07-19 21:44:39,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 51.10204081632653) internal successors, (2504), 49 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:39,876 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:39,877 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:44:39,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:40,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:40,091 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash 588862971, now seen corresponding path program 15 times [2022-07-19 21:44:40,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:40,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323956374] [2022-07-19 21:44:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:40,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:44:40,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:40,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323956374] [2022-07-19 21:44:40,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323956374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:40,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528429218] [2022-07-19 21:44:40,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:44:40,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:40,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:40,138 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:44:40,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:44:40,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 21:44:40,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:40,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-19 21:44:40,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:41,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:44:41,247 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-19 21:44:41,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 13 [2022-07-19 21:44:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:41,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:41,555 INFO L356 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-07-19 21:44:41,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 34 [2022-07-19 21:44:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:44:42,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528429218] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:42,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:42,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 26, 21] total 46 [2022-07-19 21:44:42,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497563551] [2022-07-19 21:44:42,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:42,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 21:44:42,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:42,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 21:44:42,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 21:44:42,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 116 [2022-07-19 21:44:42,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 349 transitions, 5477 flow. Second operand has 46 states, 46 states have (on average 59.67391304347826) internal successors, (2745), 46 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:42,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:42,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 116 [2022-07-19 21:44:42,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:48,602 INFO L129 PetriNetUnfolder]: 3633/19370 cut-off events. [2022-07-19 21:44:48,602 INFO L130 PetriNetUnfolder]: For 227760/228976 co-relation queries the response was YES. [2022-07-19 21:44:48,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80534 conditions, 19370 events. 3633/19370 cut-off events. For 227760/228976 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 281418 event pairs, 73 based on Foata normal form. 375/18144 useless extension candidates. Maximal degree in co-relation 80471. Up to 4608 conditions per place. [2022-07-19 21:44:48,803 INFO L132 encePairwiseOnDemand]: 85/116 looper letters, 385 selfloop transitions, 1084 changer transitions 163/1678 dead transitions. [2022-07-19 21:44:48,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1678 transitions, 34819 flow [2022-07-19 21:44:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-19 21:44:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2022-07-19 21:44:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 6671 transitions. [2022-07-19 21:44:48,809 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5228056426332288 [2022-07-19 21:44:48,809 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 6671 transitions. [2022-07-19 21:44:48,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 6671 transitions. [2022-07-19 21:44:48,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:48,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 6671 transitions. [2022-07-19 21:44:48,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 60.64545454545455) internal successors, (6671), 110 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:48,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 116.0) internal successors, (12876), 111 states have internal predecessors, (12876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:48,825 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 116.0) internal successors, (12876), 111 states have internal predecessors, (12876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:48,825 INFO L186 Difference]: Start difference. First operand has 279 places, 349 transitions, 5477 flow. Second operand 110 states and 6671 transitions. [2022-07-19 21:44:48,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1678 transitions, 34819 flow [2022-07-19 21:44:49,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1678 transitions, 33018 flow, removed 527 selfloop flow, removed 26 redundant places. [2022-07-19 21:44:49,436 INFO L242 Difference]: Finished difference. Result has 422 places, 1344 transitions, 30101 flow [2022-07-19 21:44:49,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=5002, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=30101, PETRI_PLACES=422, PETRI_TRANSITIONS=1344} [2022-07-19 21:44:49,437 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 319 predicate places. [2022-07-19 21:44:49,437 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 1344 transitions, 30101 flow [2022-07-19 21:44:49,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 59.67391304347826) internal successors, (2745), 46 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:49,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:49,438 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:44:49,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 21:44:49,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:49,642 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:49,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:49,643 INFO L85 PathProgramCache]: Analyzing trace with hash -464182535, now seen corresponding path program 16 times [2022-07-19 21:44:49,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:49,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317163006] [2022-07-19 21:44:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:49,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:44:49,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:49,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317163006] [2022-07-19 21:44:49,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317163006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:49,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694682731] [2022-07-19 21:44:49,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:44:49,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:49,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:49,725 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:44:49,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 21:44:49,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:44:49,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:49,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:44:49,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:44:49,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 21:44:49,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694682731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:49,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:49,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-07-19 21:44:49,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727243129] [2022-07-19 21:44:49,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:49,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:44:49,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:44:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:44:49,971 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-07-19 21:44:49,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 1344 transitions, 30101 flow. Second operand has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:49,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:49,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-07-19 21:44:49,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:57,267 INFO L129 PetriNetUnfolder]: 3888/21892 cut-off events. [2022-07-19 21:44:57,268 INFO L130 PetriNetUnfolder]: For 623888/626046 co-relation queries the response was YES. [2022-07-19 21:44:57,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133548 conditions, 21892 events. 3888/21892 cut-off events. For 623888/626046 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 328721 event pairs, 433 based on Foata normal form. 254/20372 useless extension candidates. Maximal degree in co-relation 133425. Up to 5114 conditions per place. [2022-07-19 21:44:57,681 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 765 selfloop transitions, 723 changer transitions 13/1693 dead transitions. [2022-07-19 21:44:57,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1693 transitions, 41603 flow [2022-07-19 21:44:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:44:57,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:44:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2022-07-19 21:44:57,682 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9181034482758621 [2022-07-19 21:44:57,683 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2022-07-19 21:44:57,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2022-07-19 21:44:57,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:57,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2022-07-19 21:44:57,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:57,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:57,685 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:57,685 INFO L186 Difference]: Start difference. First operand has 422 places, 1344 transitions, 30101 flow. Second operand 6 states and 639 transitions. [2022-07-19 21:44:57,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1693 transitions, 41603 flow [2022-07-19 21:45:00,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1693 transitions, 32802 flow, removed 4322 selfloop flow, removed 21 redundant places. [2022-07-19 21:45:00,862 INFO L242 Difference]: Finished difference. Result has 404 places, 1653 transitions, 32629 flow [2022-07-19 21:45:00,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=23472, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=32629, PETRI_PLACES=404, PETRI_TRANSITIONS=1653} [2022-07-19 21:45:00,864 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 301 predicate places. [2022-07-19 21:45:00,864 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 1653 transitions, 32629 flow [2022-07-19 21:45:00,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:00,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:00,865 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:00,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-19 21:45:01,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:01,069 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:01,069 INFO L85 PathProgramCache]: Analyzing trace with hash -342402215, now seen corresponding path program 17 times [2022-07-19 21:45:01,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:01,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057442374] [2022-07-19 21:45:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:01,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:45:01,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:01,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057442374] [2022-07-19 21:45:01,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057442374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:01,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203520878] [2022-07-19 21:45:01,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:45:01,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:01,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:01,203 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:45:01,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 21:45:01,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 21:45:01,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:01,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 21:45:01,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:01,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:45:02,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203520878] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:02,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:02,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 18] total 49 [2022-07-19 21:45:02,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176163423] [2022-07-19 21:45:02,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:02,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 21:45:02,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 21:45:02,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1956, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 21:45:02,352 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-07-19 21:45:02,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1653 transitions, 32629 flow. Second operand has 49 states, 49 states have (on average 88.18367346938776) internal successors, (4321), 49 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:02,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:02,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-07-19 21:45:02,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:06,166 INFO L129 PetriNetUnfolder]: 1298/8566 cut-off events. [2022-07-19 21:45:06,167 INFO L130 PetriNetUnfolder]: For 228056/229160 co-relation queries the response was YES. [2022-07-19 21:45:06,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50526 conditions, 8566 events. 1298/8566 cut-off events. For 228056/229160 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 109922 event pairs, 274 based on Foata normal form. 180/8035 useless extension candidates. Maximal degree in co-relation 50402. Up to 1968 conditions per place. [2022-07-19 21:45:06,282 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 391 selfloop transitions, 81 changer transitions 182/747 dead transitions. [2022-07-19 21:45:06,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 747 transitions, 16753 flow [2022-07-19 21:45:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 21:45:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-19 21:45:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2851 transitions. [2022-07-19 21:45:06,285 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7680495689655172 [2022-07-19 21:45:06,285 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2851 transitions. [2022-07-19 21:45:06,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2851 transitions. [2022-07-19 21:45:06,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:06,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2851 transitions. [2022-07-19 21:45:06,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 89.09375) internal successors, (2851), 32 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:06,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 116.0) internal successors, (3828), 33 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:06,291 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 116.0) internal successors, (3828), 33 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:06,291 INFO L186 Difference]: Start difference. First operand has 404 places, 1653 transitions, 32629 flow. Second operand 32 states and 2851 transitions. [2022-07-19 21:45:06,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 747 transitions, 16753 flow [2022-07-19 21:45:07,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 747 transitions, 15576 flow, removed 280 selfloop flow, removed 30 redundant places. [2022-07-19 21:45:07,303 INFO L242 Difference]: Finished difference. Result has 373 places, 556 transitions, 10815 flow [2022-07-19 21:45:07,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=13567, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10815, PETRI_PLACES=373, PETRI_TRANSITIONS=556} [2022-07-19 21:45:07,303 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 270 predicate places. [2022-07-19 21:45:07,304 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 556 transitions, 10815 flow [2022-07-19 21:45:07,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 88.18367346938776) internal successors, (4321), 49 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:07,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:07,304 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-19 21:45:07,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 21:45:07,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:07,507 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1358639066, now seen corresponding path program 18 times [2022-07-19 21:45:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:07,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547714346] [2022-07-19 21:45:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:07,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:07,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547714346] [2022-07-19 21:45:07,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547714346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386166258] [2022-07-19 21:45:07,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:45:07,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:07,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:07,920 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:45:07,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 21:45:08,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 21:45:08,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:08,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 21:45:08,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:21,051 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-07-19 21:45:21,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 10 [2022-07-19 21:45:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 54 refuted. 18 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 21:45:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:21,213 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-19 21:45:21,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 13 [2022-07-19 21:45:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 21:45:21,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386166258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:21,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:21,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 59 [2022-07-19 21:45:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412471867] [2022-07-19 21:45:21,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:21,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-19 21:45:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-19 21:45:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=3059, Unknown=6, NotChecked=0, Total=3422 [2022-07-19 21:45:21,845 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 116 [2022-07-19 21:45:21,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 556 transitions, 10815 flow. Second operand has 59 states, 59 states have (on average 59.03389830508475) internal successors, (3483), 59 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:21,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:21,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 116 [2022-07-19 21:45:21,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand