./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy11.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-easy11.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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:44:35,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:44:35,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:44:35,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:44:35,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:44:35,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:44:35,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:44:35,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:44:35,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:44:35,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:44:35,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:44:35,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:44:35,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:44:35,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:44:35,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:44:35,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:44:35,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:44:35,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:44:35,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:44:35,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:44:35,877 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:44:35,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:44:35,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:44:35,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:44:35,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:44:35,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:44:35,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:44:35,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:44:35,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:44:35,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:44:35,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:44:35,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:44:35,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:44:35,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:44:35,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:44:35,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:44:35,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:44:35,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:44:35,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:44:35,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:44:35,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:44:35,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:44:35,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:44:35,943 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:44:35,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:44:35,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:44:35,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:44:35,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:44:35,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:44:35,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:44:35,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:44:35,946 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:44:35,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:44:35,947 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:44:35,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:44:35,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:44:35,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:44:35,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:44:35,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:44:35,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:44:35,948 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:44:35,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:44:35,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:44:35,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:44:35,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:44:35,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:44:35,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:44:35,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:44:35,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:44:35,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:44:35,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:44:35,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:44:35,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:44:35,952 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:44:35,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:44:35,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:44:35,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2022-07-19 21:44:36,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:44:36,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:44:36,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:44:36,213 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:44:36,214 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:44:36,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-07-19 21:44:36,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d8508ca/83939682094f415d82954a59737a9781/FLAG1488fc230 [2022-07-19 21:44:36,754 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:44:36,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-07-19 21:44:36,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d8508ca/83939682094f415d82954a59737a9781/FLAG1488fc230 [2022-07-19 21:44:37,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d8508ca/83939682094f415d82954a59737a9781 [2022-07-19 21:44:37,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:44:37,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:44:37,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:44:37,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:44:37,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:44:37,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51cc195b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37, skipping insertion in model container [2022-07-19 21:44:37,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:44:37,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:44:37,344 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-easy11.wvr.c[2005,2018] [2022-07-19 21:44:37,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:44:37,353 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:44:37,369 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-easy11.wvr.c[2005,2018] [2022-07-19 21:44:37,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:44:37,386 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:44:37,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37 WrapperNode [2022-07-19 21:44:37,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:44:37,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:44:37,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:44:37,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:44:37,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,403 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,423 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-07-19 21:44:37,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:44:37,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:44:37,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:44:37,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:44:37,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:44:37,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:44:37,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:44:37,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:44:37,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (1/1) ... [2022-07-19 21:44:37,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:44:37,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:37,509 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 21:44:37,511 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 21:44:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:44:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:44:37,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:44:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:44:37,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:44:37,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:44:37,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:44:37,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:44:37,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:44:37,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:44:37,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:44:37,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:44:37,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:44:37,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:44:37,549 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 21:44:37,661 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:44:37,663 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:44:37,860 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:44:37,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:44:37,874 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:44:37,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:37 BoogieIcfgContainer [2022-07-19 21:44:37,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:44:37,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:44:37,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:44:37,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:44:37,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:44:37" (1/3) ... [2022-07-19 21:44:37,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3a1fd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:37, skipping insertion in model container [2022-07-19 21:44:37,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:37" (2/3) ... [2022-07-19 21:44:37,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3a1fd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:37, skipping insertion in model container [2022-07-19 21:44:37,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:37" (3/3) ... [2022-07-19 21:44:37,897 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-07-19 21:44:37,902 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:44:37,911 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:44:37,912 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:44:37,913 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:44:37,990 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:44:38,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-07-19 21:44:38,111 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-07-19 21:44:38,111 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:44:38,121 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-07-19 21:44:38,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-07-19 21:44:38,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-07-19 21:44:38,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:44:38,153 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@7e827231, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5430f510 [2022-07-19 21:44:38,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:44:38,187 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-07-19 21:44:38,192 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:44:38,193 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:38,193 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] [2022-07-19 21:44:38,194 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 21:44:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:38,200 INFO L85 PathProgramCache]: Analyzing trace with hash 988547457, now seen corresponding path program 1 times [2022-07-19 21:44:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:38,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710373998] [2022-07-19 21:44:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:38,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:38,773 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 21:44:38,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:38,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710373998] [2022-07-19 21:44:38,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710373998] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:38,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:38,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:38,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002242371] [2022-07-19 21:44:38,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:38,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:38,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:38,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:38,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:38,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:38,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:39,224 INFO L129 PetriNetUnfolder]: 90/301 cut-off events. [2022-07-19 21:44:39,225 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-19 21:44:39,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 301 events. 90/301 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1193 event pairs, 29 based on Foata normal form. 3/266 useless extension candidates. Maximal degree in co-relation 412. Up to 60 conditions per place. [2022-07-19 21:44:39,229 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 55 selfloop transitions, 16 changer transitions 10/122 dead transitions. [2022-07-19 21:44:39,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 427 flow [2022-07-19 21:44:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 21:44:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-19 21:44:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-07-19 21:44:39,255 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6537356321839081 [2022-07-19 21:44:39,256 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-07-19 21:44:39,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-07-19 21:44:39,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:39,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-07-19 21:44:39,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 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 21:44:39,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 87.0) internal successors, (1479), 17 states have internal predecessors, (1479), 0 states have call successors, (0), 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 21:44:39,293 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 87.0) internal successors, (1479), 17 states have internal predecessors, (1479), 0 states have call successors, (0), 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 21:44:39,294 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 16 states and 910 transitions. [2022-07-19 21:44:39,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 427 flow [2022-07-19 21:44:39,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 413 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:44:39,302 INFO L242 Difference]: Finished difference. Result has 95 places, 82 transitions, 241 flow [2022-07-19 21:44:39,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=241, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2022-07-19 21:44:39,307 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 18 predicate places. [2022-07-19 21:44:39,308 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 241 flow [2022-07-19 21:44:39,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:39,308 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:39,309 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] [2022-07-19 21:44:39,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:44:39,309 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 21:44:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash -606779393, now seen corresponding path program 2 times [2022-07-19 21:44:39,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:39,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555549340] [2022-07-19 21:44:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:39,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:39,622 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 21:44:39,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:39,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555549340] [2022-07-19 21:44:39,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555549340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:39,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:39,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:39,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731620185] [2022-07-19 21:44:39,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:39,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:39,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:39,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:39,634 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:39,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:39,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:39,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:39,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:39,952 INFO L129 PetriNetUnfolder]: 137/421 cut-off events. [2022-07-19 21:44:39,953 INFO L130 PetriNetUnfolder]: For 160/162 co-relation queries the response was YES. [2022-07-19 21:44:39,955 INFO L84 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 421 events. 137/421 cut-off events. For 160/162 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2067 event pairs, 24 based on Foata normal form. 3/421 useless extension candidates. Maximal degree in co-relation 944. Up to 82 conditions per place. [2022-07-19 21:44:39,957 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 23 changer transitions 8/141 dead transitions. [2022-07-19 21:44:39,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 141 transitions, 660 flow [2022-07-19 21:44:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2022-07-19 21:44:39,961 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2022-07-19 21:44:39,961 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2022-07-19 21:44:39,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2022-07-19 21:44:39,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:39,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2022-07-19 21:44:39,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 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 21:44:39,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:39,967 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:39,968 INFO L186 Difference]: Start difference. First operand has 95 places, 82 transitions, 241 flow. Second operand 14 states and 799 transitions. [2022-07-19 21:44:39,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 141 transitions, 660 flow [2022-07-19 21:44:39,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 644 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-07-19 21:44:39,974 INFO L242 Difference]: Finished difference. Result has 102 places, 96 transitions, 382 flow [2022-07-19 21:44:39,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=382, PETRI_PLACES=102, PETRI_TRANSITIONS=96} [2022-07-19 21:44:39,975 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 25 predicate places. [2022-07-19 21:44:39,975 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 96 transitions, 382 flow [2022-07-19 21:44:39,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:39,976 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:39,976 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] [2022-07-19 21:44:39,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:44:39,976 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 21:44:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:39,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1133456201, now seen corresponding path program 3 times [2022-07-19 21:44:39,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:39,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111124973] [2022-07-19 21:44:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:39,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:40,220 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 21:44:40,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:40,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111124973] [2022-07-19 21:44:40,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111124973] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:40,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:40,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:40,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109572809] [2022-07-19 21:44:40,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:40,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:40,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:40,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:40,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:40,228 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:40,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 96 transitions, 382 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:40,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:40,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:40,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:40,542 INFO L129 PetriNetUnfolder]: 140/436 cut-off events. [2022-07-19 21:44:40,543 INFO L130 PetriNetUnfolder]: For 442/446 co-relation queries the response was YES. [2022-07-19 21:44:40,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1207 conditions, 436 events. 140/436 cut-off events. For 442/446 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2103 event pairs, 32 based on Foata normal form. 5/434 useless extension candidates. Maximal degree in co-relation 1186. Up to 128 conditions per place. [2022-07-19 21:44:40,547 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 25 changer transitions 8/135 dead transitions. [2022-07-19 21:44:40,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 756 flow [2022-07-19 21:44:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-19 21:44:40,550 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-19 21:44:40,550 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-19 21:44:40,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-19 21:44:40,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:40,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-19 21:44:40,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 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 21:44:40,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:40,556 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:40,557 INFO L186 Difference]: Start difference. First operand has 102 places, 96 transitions, 382 flow. Second operand 14 states and 790 transitions. [2022-07-19 21:44:40,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 756 flow [2022-07-19 21:44:40,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 135 transitions, 696 flow, removed 20 selfloop flow, removed 8 redundant places. [2022-07-19 21:44:40,564 INFO L242 Difference]: Finished difference. Result has 109 places, 101 transitions, 453 flow [2022-07-19 21:44:40,564 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=453, PETRI_PLACES=109, PETRI_TRANSITIONS=101} [2022-07-19 21:44:40,565 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 32 predicate places. [2022-07-19 21:44:40,565 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 101 transitions, 453 flow [2022-07-19 21:44:40,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:40,566 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:40,566 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] [2022-07-19 21:44:40,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:44:40,566 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 21:44:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:40,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1891949299, now seen corresponding path program 4 times [2022-07-19 21:44:40,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:40,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643578393] [2022-07-19 21:44:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:40,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:40,772 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 21:44:40,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:40,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643578393] [2022-07-19 21:44:40,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643578393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:40,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:40,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:40,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108595566] [2022-07-19 21:44:40,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:40,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:40,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:40,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:40,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:40,776 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:40,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 101 transitions, 453 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:40,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:40,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:40,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:41,137 INFO L129 PetriNetUnfolder]: 142/415 cut-off events. [2022-07-19 21:44:41,138 INFO L130 PetriNetUnfolder]: For 571/578 co-relation queries the response was YES. [2022-07-19 21:44:41,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 415 events. 142/415 cut-off events. For 571/578 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2012 event pairs, 36 based on Foata normal form. 5/413 useless extension candidates. Maximal degree in co-relation 1237. Up to 128 conditions per place. [2022-07-19 21:44:41,142 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 30 changer transitions 8/142 dead transitions. [2022-07-19 21:44:41,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 142 transitions, 860 flow [2022-07-19 21:44:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:41,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-07-19 21:44:41,145 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-07-19 21:44:41,146 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-07-19 21:44:41,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-07-19 21:44:41,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:41,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-07-19 21:44:41,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 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 21:44:41,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:41,158 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:41,158 INFO L186 Difference]: Start difference. First operand has 109 places, 101 transitions, 453 flow. Second operand 14 states and 792 transitions. [2022-07-19 21:44:41,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 142 transitions, 860 flow [2022-07-19 21:44:41,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 142 transitions, 776 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-19 21:44:41,167 INFO L242 Difference]: Finished difference. Result has 113 places, 106 transitions, 522 flow [2022-07-19 21:44:41,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=522, PETRI_PLACES=113, PETRI_TRANSITIONS=106} [2022-07-19 21:44:41,169 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 36 predicate places. [2022-07-19 21:44:41,170 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 106 transitions, 522 flow [2022-07-19 21:44:41,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:41,170 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:41,171 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] [2022-07-19 21:44:41,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:44:41,171 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 21:44:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1806850797, now seen corresponding path program 5 times [2022-07-19 21:44:41,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:41,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717305060] [2022-07-19 21:44:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:41,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:41,429 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 21:44:41,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:41,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717305060] [2022-07-19 21:44:41,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717305060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:41,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:41,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:41,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608357428] [2022-07-19 21:44:41,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:41,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:41,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:41,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:41,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:41,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:41,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 106 transitions, 522 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:41,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:41,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:41,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:41,775 INFO L129 PetriNetUnfolder]: 148/470 cut-off events. [2022-07-19 21:44:41,776 INFO L130 PetriNetUnfolder]: For 749/758 co-relation queries the response was YES. [2022-07-19 21:44:41,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1391 conditions, 470 events. 148/470 cut-off events. For 749/758 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2388 event pairs, 34 based on Foata normal form. 7/473 useless extension candidates. Maximal degree in co-relation 1366. Up to 131 conditions per place. [2022-07-19 21:44:41,781 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 30 changer transitions 8/146 dead transitions. [2022-07-19 21:44:41,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 146 transitions, 901 flow [2022-07-19 21:44:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:41,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-07-19 21:44:41,784 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-07-19 21:44:41,784 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-07-19 21:44:41,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-07-19 21:44:41,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:41,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-07-19 21:44:41,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 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 21:44:41,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:41,790 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:41,790 INFO L186 Difference]: Start difference. First operand has 113 places, 106 transitions, 522 flow. Second operand 14 states and 796 transitions. [2022-07-19 21:44:41,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 146 transitions, 901 flow [2022-07-19 21:44:41,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 146 transitions, 833 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-19 21:44:41,797 INFO L242 Difference]: Finished difference. Result has 116 places, 107 transitions, 540 flow [2022-07-19 21:44:41,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=540, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2022-07-19 21:44:41,798 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 39 predicate places. [2022-07-19 21:44:41,803 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 540 flow [2022-07-19 21:44:41,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:41,804 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:41,804 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] [2022-07-19 21:44:41,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:44:41,805 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 21:44:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:41,806 INFO L85 PathProgramCache]: Analyzing trace with hash 338165169, now seen corresponding path program 6 times [2022-07-19 21:44:41,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:41,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141836138] [2022-07-19 21:44:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:41,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:42,066 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 21:44:42,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:42,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141836138] [2022-07-19 21:44:42,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141836138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:42,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:42,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-19 21:44:42,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304397682] [2022-07-19 21:44:42,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:42,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 21:44:42,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:42,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 21:44:42,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:44:42,070 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:42,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 540 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 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 21:44:42,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:42,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:42,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:42,356 INFO L129 PetriNetUnfolder]: 145/456 cut-off events. [2022-07-19 21:44:42,356 INFO L130 PetriNetUnfolder]: For 728/730 co-relation queries the response was YES. [2022-07-19 21:44:42,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 456 events. 145/456 cut-off events. For 728/730 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2339 event pairs, 29 based on Foata normal form. 3/454 useless extension candidates. Maximal degree in co-relation 1368. Up to 140 conditions per place. [2022-07-19 21:44:42,361 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 28 changer transitions 8/141 dead transitions. [2022-07-19 21:44:42,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 141 transitions, 890 flow [2022-07-19 21:44:42,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-19 21:44:42,364 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-19 21:44:42,364 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-19 21:44:42,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-19 21:44:42,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:42,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-19 21:44:42,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 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 21:44:42,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:42,370 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:42,370 INFO L186 Difference]: Start difference. First operand has 116 places, 107 transitions, 540 flow. Second operand 14 states and 790 transitions. [2022-07-19 21:44:42,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 141 transitions, 890 flow [2022-07-19 21:44:42,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 141 transitions, 816 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:42,377 INFO L242 Difference]: Finished difference. Result has 117 places, 105 transitions, 518 flow [2022-07-19 21:44:42,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=518, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2022-07-19 21:44:42,378 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 40 predicate places. [2022-07-19 21:44:42,378 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 518 flow [2022-07-19 21:44:42,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 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 21:44:42,379 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:42,379 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] [2022-07-19 21:44:42,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:44:42,380 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 21:44:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash -210038721, now seen corresponding path program 7 times [2022-07-19 21:44:42,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:42,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529649138] [2022-07-19 21:44:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:42,580 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 21:44:42,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:42,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529649138] [2022-07-19 21:44:42,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529649138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:42,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:42,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-19 21:44:42,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228225126] [2022-07-19 21:44:42,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:42,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 21:44:42,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 21:44:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:44:42,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:42,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 518 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 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 21:44:42,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:42,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:42,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:42,860 INFO L129 PetriNetUnfolder]: 166/469 cut-off events. [2022-07-19 21:44:42,861 INFO L130 PetriNetUnfolder]: For 853/853 co-relation queries the response was YES. [2022-07-19 21:44:42,863 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 469 events. 166/469 cut-off events. For 853/853 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2299 event pairs, 41 based on Foata normal form. 1/459 useless extension candidates. Maximal degree in co-relation 1497. Up to 141 conditions per place. [2022-07-19 21:44:42,866 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 37 changer transitions 8/147 dead transitions. [2022-07-19 21:44:42,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 147 transitions, 975 flow [2022-07-19 21:44:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-07-19 21:44:42,869 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-07-19 21:44:42,869 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-07-19 21:44:42,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-07-19 21:44:42,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:42,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-07-19 21:44:42,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 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 21:44:42,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:42,877 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:42,877 INFO L186 Difference]: Start difference. First operand has 117 places, 105 transitions, 518 flow. Second operand 14 states and 794 transitions. [2022-07-19 21:44:42,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 147 transitions, 975 flow [2022-07-19 21:44:42,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 879 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:42,884 INFO L242 Difference]: Finished difference. Result has 119 places, 116 transitions, 669 flow [2022-07-19 21:44:42,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=669, PETRI_PLACES=119, PETRI_TRANSITIONS=116} [2022-07-19 21:44:42,886 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-07-19 21:44:42,886 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 669 flow [2022-07-19 21:44:42,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 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 21:44:42,886 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:42,887 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] [2022-07-19 21:44:42,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:44:42,888 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 21:44:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1678747771, now seen corresponding path program 8 times [2022-07-19 21:44:42,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:42,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786253024] [2022-07-19 21:44:42,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:42,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:43,065 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 21:44:43,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:43,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786253024] [2022-07-19 21:44:43,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786253024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:43,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:43,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:43,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161198756] [2022-07-19 21:44:43,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:43,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:43,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:43,067 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:43,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 116 transitions, 669 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:43,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:43,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:43,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:43,383 INFO L129 PetriNetUnfolder]: 185/525 cut-off events. [2022-07-19 21:44:43,383 INFO L130 PetriNetUnfolder]: For 1263/1267 co-relation queries the response was YES. [2022-07-19 21:44:43,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 525 events. 185/525 cut-off events. For 1263/1267 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2704 event pairs, 29 based on Foata normal form. 3/523 useless extension candidates. Maximal degree in co-relation 1789. Up to 154 conditions per place. [2022-07-19 21:44:43,389 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 43 changer transitions 7/156 dead transitions. [2022-07-19 21:44:43,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 156 transitions, 1142 flow [2022-07-19 21:44:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-19 21:44:43,392 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-19 21:44:43,392 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-19 21:44:43,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-19 21:44:43,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:43,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-19 21:44:43,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 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 21:44:43,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:43,397 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:43,397 INFO L186 Difference]: Start difference. First operand has 119 places, 116 transitions, 669 flow. Second operand 14 states and 793 transitions. [2022-07-19 21:44:43,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 156 transitions, 1142 flow [2022-07-19 21:44:43,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1075 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-07-19 21:44:43,405 INFO L242 Difference]: Finished difference. Result has 126 places, 125 transitions, 850 flow [2022-07-19 21:44:43,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=850, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2022-07-19 21:44:43,406 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 49 predicate places. [2022-07-19 21:44:43,407 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 850 flow [2022-07-19 21:44:43,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:43,407 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:43,407 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] [2022-07-19 21:44:43,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:44:43,408 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 21:44:43,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:43,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1095483919, now seen corresponding path program 9 times [2022-07-19 21:44:43,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:43,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330585796] [2022-07-19 21:44:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:43,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:43,576 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 21:44:43,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:43,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330585796] [2022-07-19 21:44:43,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330585796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:43,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:43,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:43,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403217550] [2022-07-19 21:44:43,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:43,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:43,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:43,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:43,579 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:43,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 850 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:43,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:43,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:43,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:43,927 INFO L129 PetriNetUnfolder]: 184/522 cut-off events. [2022-07-19 21:44:43,927 INFO L130 PetriNetUnfolder]: For 1694/1698 co-relation queries the response was YES. [2022-07-19 21:44:43,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1935 conditions, 522 events. 184/522 cut-off events. For 1694/1698 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2683 event pairs, 27 based on Foata normal form. 3/520 useless extension candidates. Maximal degree in co-relation 1903. Up to 153 conditions per place. [2022-07-19 21:44:43,934 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 44 changer transitions 7/157 dead transitions. [2022-07-19 21:44:43,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 157 transitions, 1247 flow [2022-07-19 21:44:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-19 21:44:43,937 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-19 21:44:43,937 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-19 21:44:43,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-19 21:44:43,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:43,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-19 21:44:43,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 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 21:44:43,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:43,942 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:43,942 INFO L186 Difference]: Start difference. First operand has 126 places, 125 transitions, 850 flow. Second operand 14 states and 793 transitions. [2022-07-19 21:44:43,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 157 transitions, 1247 flow [2022-07-19 21:44:43,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 157 transitions, 1163 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-07-19 21:44:43,952 INFO L242 Difference]: Finished difference. Result has 132 places, 127 transitions, 920 flow [2022-07-19 21:44:43,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=920, PETRI_PLACES=132, PETRI_TRANSITIONS=127} [2022-07-19 21:44:43,953 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-07-19 21:44:43,954 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 127 transitions, 920 flow [2022-07-19 21:44:43,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:43,954 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:43,954 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] [2022-07-19 21:44:43,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:44:43,955 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 21:44:43,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:43,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2108680237, now seen corresponding path program 10 times [2022-07-19 21:44:43,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:43,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262810700] [2022-07-19 21:44:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:43,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:44,143 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 21:44:44,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:44,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262810700] [2022-07-19 21:44:44,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262810700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:44,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:44,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:44,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14725844] [2022-07-19 21:44:44,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:44,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:44,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:44,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:44,152 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:44,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 127 transitions, 920 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:44,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:44,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:44,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:44,507 INFO L129 PetriNetUnfolder]: 180/503 cut-off events. [2022-07-19 21:44:44,508 INFO L130 PetriNetUnfolder]: For 2010/2010 co-relation queries the response was YES. [2022-07-19 21:44:44,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 503 events. 180/503 cut-off events. For 2010/2010 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2592 event pairs, 44 based on Foata normal form. 1/493 useless extension candidates. Maximal degree in co-relation 1905. Up to 143 conditions per place. [2022-07-19 21:44:44,513 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 44 changer transitions 7/160 dead transitions. [2022-07-19 21:44:44,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 160 transitions, 1297 flow [2022-07-19 21:44:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-07-19 21:44:44,515 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-07-19 21:44:44,515 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-07-19 21:44:44,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-07-19 21:44:44,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:44,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-07-19 21:44:44,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 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 21:44:44,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:44,521 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:44,521 INFO L186 Difference]: Start difference. First operand has 132 places, 127 transitions, 920 flow. Second operand 14 states and 795 transitions. [2022-07-19 21:44:44,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 160 transitions, 1297 flow [2022-07-19 21:44:44,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 160 transitions, 1201 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-07-19 21:44:44,532 INFO L242 Difference]: Finished difference. Result has 136 places, 128 transitions, 938 flow [2022-07-19 21:44:44,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=938, PETRI_PLACES=136, PETRI_TRANSITIONS=128} [2022-07-19 21:44:44,534 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-07-19 21:44:44,534 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 128 transitions, 938 flow [2022-07-19 21:44:44,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:44,535 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:44,535 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] [2022-07-19 21:44:44,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:44:44,535 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 21:44:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2083365095, now seen corresponding path program 11 times [2022-07-19 21:44:44,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:44,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519306736] [2022-07-19 21:44:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:44,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:44,706 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 21:44:44,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:44,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519306736] [2022-07-19 21:44:44,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519306736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:44,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:44,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:44,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138067259] [2022-07-19 21:44:44,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:44,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:44,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:44,710 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:44,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 128 transitions, 938 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:44,711 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:44,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:44,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:45,005 INFO L129 PetriNetUnfolder]: 180/498 cut-off events. [2022-07-19 21:44:45,006 INFO L130 PetriNetUnfolder]: For 1977/1979 co-relation queries the response was YES. [2022-07-19 21:44:45,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 498 events. 180/498 cut-off events. For 1977/1979 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2596 event pairs, 37 based on Foata normal form. 1/490 useless extension candidates. Maximal degree in co-relation 1909. Up to 147 conditions per place. [2022-07-19 21:44:45,012 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 42 changer transitions 9/158 dead transitions. [2022-07-19 21:44:45,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 158 transitions, 1295 flow [2022-07-19 21:44:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-19 21:44:45,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-19 21:44:45,014 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-19 21:44:45,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-19 21:44:45,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:45,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-19 21:44:45,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 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 21:44:45,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:45,019 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:45,019 INFO L186 Difference]: Start difference. First operand has 136 places, 128 transitions, 938 flow. Second operand 14 states and 793 transitions. [2022-07-19 21:44:45,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 158 transitions, 1295 flow [2022-07-19 21:44:45,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 158 transitions, 1193 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:45,031 INFO L242 Difference]: Finished difference. Result has 137 places, 126 transitions, 905 flow [2022-07-19 21:44:45,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=905, PETRI_PLACES=137, PETRI_TRANSITIONS=126} [2022-07-19 21:44:45,032 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-19 21:44:45,032 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 126 transitions, 905 flow [2022-07-19 21:44:45,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:45,033 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:45,033 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] [2022-07-19 21:44:45,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:44:45,033 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 21:44:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 536902577, now seen corresponding path program 12 times [2022-07-19 21:44:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:45,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963346069] [2022-07-19 21:44:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:45,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:45,194 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 21:44:45,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:45,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963346069] [2022-07-19 21:44:45,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963346069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:45,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:45,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:45,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102011203] [2022-07-19 21:44:45,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:45,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:45,198 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:45,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 126 transitions, 905 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:45,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:45,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:45,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:45,510 INFO L129 PetriNetUnfolder]: 185/534 cut-off events. [2022-07-19 21:44:45,511 INFO L130 PetriNetUnfolder]: For 2069/2069 co-relation queries the response was YES. [2022-07-19 21:44:45,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 534 events. 185/534 cut-off events. For 2069/2069 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2892 event pairs, 41 based on Foata normal form. 1/525 useless extension candidates. Maximal degree in co-relation 1965. Up to 147 conditions per place. [2022-07-19 21:44:45,517 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 44 changer transitions 8/162 dead transitions. [2022-07-19 21:44:45,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 162 transitions, 1303 flow [2022-07-19 21:44:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2022-07-19 21:44:45,519 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2022-07-19 21:44:45,519 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2022-07-19 21:44:45,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2022-07-19 21:44:45,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:45,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2022-07-19 21:44:45,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.92857142857143) internal successors, (797), 14 states have internal predecessors, (797), 0 states have call successors, (0), 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 21:44:45,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:45,524 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:45,524 INFO L186 Difference]: Start difference. First operand has 137 places, 126 transitions, 905 flow. Second operand 14 states and 797 transitions. [2022-07-19 21:44:45,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 162 transitions, 1303 flow [2022-07-19 21:44:45,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 162 transitions, 1201 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:45,540 INFO L242 Difference]: Finished difference. Result has 137 places, 128 transitions, 929 flow [2022-07-19 21:44:45,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=929, PETRI_PLACES=137, PETRI_TRANSITIONS=128} [2022-07-19 21:44:45,542 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-19 21:44:45,542 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 128 transitions, 929 flow [2022-07-19 21:44:45,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:45,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:45,543 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] [2022-07-19 21:44:45,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:44:45,543 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 21:44:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:45,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1478478085, now seen corresponding path program 13 times [2022-07-19 21:44:45,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:45,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765266420] [2022-07-19 21:44:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:45,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:45,728 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 21:44:45,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:45,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765266420] [2022-07-19 21:44:45,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765266420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:45,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:45,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:45,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005192256] [2022-07-19 21:44:45,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:45,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:45,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:45,731 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:45,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 128 transitions, 929 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:45,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:45,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:45,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:46,068 INFO L129 PetriNetUnfolder]: 186/555 cut-off events. [2022-07-19 21:44:46,068 INFO L130 PetriNetUnfolder]: For 2147/2151 co-relation queries the response was YES. [2022-07-19 21:44:46,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 555 events. 186/555 cut-off events. For 2147/2151 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3037 event pairs, 30 based on Foata normal form. 3/552 useless extension candidates. Maximal degree in co-relation 2013. Up to 163 conditions per place. [2022-07-19 21:44:46,075 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 40 changer transitions 9/157 dead transitions. [2022-07-19 21:44:46,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 157 transitions, 1284 flow [2022-07-19 21:44:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-07-19 21:44:46,077 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-07-19 21:44:46,077 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-07-19 21:44:46,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-07-19 21:44:46,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:46,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-07-19 21:44:46,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 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 21:44:46,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:46,081 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:46,082 INFO L186 Difference]: Start difference. First operand has 137 places, 128 transitions, 929 flow. Second operand 14 states and 792 transitions. [2022-07-19 21:44:46,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 157 transitions, 1284 flow [2022-07-19 21:44:46,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 157 transitions, 1182 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:46,092 INFO L242 Difference]: Finished difference. Result has 137 places, 125 transitions, 882 flow [2022-07-19 21:44:46,093 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=882, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2022-07-19 21:44:46,094 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-07-19 21:44:46,094 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 882 flow [2022-07-19 21:44:46,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:46,095 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:46,095 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] [2022-07-19 21:44:46,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:44:46,095 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 21:44:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1731083455, now seen corresponding path program 14 times [2022-07-19 21:44:46,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:46,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320665122] [2022-07-19 21:44:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:46,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:46,279 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 21:44:46,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:46,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320665122] [2022-07-19 21:44:46,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320665122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:46,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:46,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123967275] [2022-07-19 21:44:46,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:46,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:46,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:46,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:46,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 882 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:46,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:46,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:46,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:46,661 INFO L129 PetriNetUnfolder]: 181/515 cut-off events. [2022-07-19 21:44:46,661 INFO L130 PetriNetUnfolder]: For 2031/2033 co-relation queries the response was YES. [2022-07-19 21:44:46,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 515 events. 181/515 cut-off events. For 2031/2033 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2700 event pairs, 46 based on Foata normal form. 1/504 useless extension candidates. Maximal degree in co-relation 1920. Up to 154 conditions per place. [2022-07-19 21:44:46,667 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 42 changer transitions 8/157 dead transitions. [2022-07-19 21:44:46,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 157 transitions, 1278 flow [2022-07-19 21:44:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-07-19 21:44:46,671 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-07-19 21:44:46,671 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-07-19 21:44:46,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-07-19 21:44:46,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:46,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-07-19 21:44:46,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 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 21:44:46,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:46,676 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:46,676 INFO L186 Difference]: Start difference. First operand has 137 places, 125 transitions, 882 flow. Second operand 14 states and 793 transitions. [2022-07-19 21:44:46,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 157 transitions, 1278 flow [2022-07-19 21:44:46,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 157 transitions, 1180 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-07-19 21:44:46,686 INFO L242 Difference]: Finished difference. Result has 139 places, 127 transitions, 926 flow [2022-07-19 21:44:46,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=926, PETRI_PLACES=139, PETRI_TRANSITIONS=127} [2022-07-19 21:44:46,687 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 62 predicate places. [2022-07-19 21:44:46,687 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 127 transitions, 926 flow [2022-07-19 21:44:46,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:46,688 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:46,688 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] [2022-07-19 21:44:46,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:44:46,688 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 21:44:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:46,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2109524753, now seen corresponding path program 15 times [2022-07-19 21:44:46,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:46,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734225386] [2022-07-19 21:44:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:46,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:46,854 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 21:44:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:46,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734225386] [2022-07-19 21:44:46,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734225386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:46,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:46,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153927671] [2022-07-19 21:44:46,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:46,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:46,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:46,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:46,857 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:46,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 127 transitions, 926 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:46,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:46,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:46,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:47,155 INFO L129 PetriNetUnfolder]: 179/508 cut-off events. [2022-07-19 21:44:47,156 INFO L130 PetriNetUnfolder]: For 2057/2059 co-relation queries the response was YES. [2022-07-19 21:44:47,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1975 conditions, 508 events. 179/508 cut-off events. For 2057/2059 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2683 event pairs, 50 based on Foata normal form. 1/497 useless extension candidates. Maximal degree in co-relation 1937. Up to 153 conditions per place. [2022-07-19 21:44:47,162 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 38 changer transitions 8/157 dead transitions. [2022-07-19 21:44:47,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 157 transitions, 1312 flow [2022-07-19 21:44:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2022-07-19 21:44:47,164 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2022-07-19 21:44:47,165 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2022-07-19 21:44:47,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2022-07-19 21:44:47,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:47,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2022-07-19 21:44:47,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 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 21:44:47,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:47,182 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:47,182 INFO L186 Difference]: Start difference. First operand has 139 places, 127 transitions, 926 flow. Second operand 14 states and 788 transitions. [2022-07-19 21:44:47,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 157 transitions, 1312 flow [2022-07-19 21:44:47,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 157 transitions, 1235 flow, removed 7 selfloop flow, removed 10 redundant places. [2022-07-19 21:44:47,194 INFO L242 Difference]: Finished difference. Result has 142 places, 125 transitions, 911 flow [2022-07-19 21:44:47,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=911, PETRI_PLACES=142, PETRI_TRANSITIONS=125} [2022-07-19 21:44:47,195 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 65 predicate places. [2022-07-19 21:44:47,195 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 125 transitions, 911 flow [2022-07-19 21:44:47,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:47,196 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:47,196 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] [2022-07-19 21:44:47,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:44:47,197 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 21:44:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash 967734761, now seen corresponding path program 16 times [2022-07-19 21:44:47,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:47,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503236618] [2022-07-19 21:44:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:47,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:47,368 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 21:44:47,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:47,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503236618] [2022-07-19 21:44:47,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503236618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:47,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:47,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:47,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379592648] [2022-07-19 21:44:47,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:47,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:47,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:47,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:47,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:47,374 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:47,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 125 transitions, 911 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:47,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:47,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:47,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:47,703 INFO L129 PetriNetUnfolder]: 183/550 cut-off events. [2022-07-19 21:44:47,703 INFO L130 PetriNetUnfolder]: For 2125/2129 co-relation queries the response was YES. [2022-07-19 21:44:47,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 550 events. 183/550 cut-off events. For 2125/2129 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2994 event pairs, 42 based on Foata normal form. 3/544 useless extension candidates. Maximal degree in co-relation 2011. Up to 159 conditions per place. [2022-07-19 21:44:47,710 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 39 changer transitions 7/159 dead transitions. [2022-07-19 21:44:47,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 159 transitions, 1325 flow [2022-07-19 21:44:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-19 21:44:47,712 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-19 21:44:47,712 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-19 21:44:47,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-19 21:44:47,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:47,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-19 21:44:47,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 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 21:44:47,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:47,717 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:47,718 INFO L186 Difference]: Start difference. First operand has 142 places, 125 transitions, 911 flow. Second operand 14 states and 790 transitions. [2022-07-19 21:44:47,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 159 transitions, 1325 flow [2022-07-19 21:44:47,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 159 transitions, 1235 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:47,729 INFO L242 Difference]: Finished difference. Result has 142 places, 126 transitions, 927 flow [2022-07-19 21:44:47,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=927, PETRI_PLACES=142, PETRI_TRANSITIONS=126} [2022-07-19 21:44:47,730 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 65 predicate places. [2022-07-19 21:44:47,731 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 126 transitions, 927 flow [2022-07-19 21:44:47,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:47,733 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:47,733 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] [2022-07-19 21:44:47,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:44:47,734 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 21:44:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash 18414173, now seen corresponding path program 17 times [2022-07-19 21:44:47,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:47,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476877388] [2022-07-19 21:44:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:47,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:47,887 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 21:44:47,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:47,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476877388] [2022-07-19 21:44:47,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476877388] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:47,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:47,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:47,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263106196] [2022-07-19 21:44:47,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:47,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:47,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:47,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:47,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:47,890 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:47,891 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 126 transitions, 927 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:47,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:47,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:47,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:48,206 INFO L129 PetriNetUnfolder]: 182/549 cut-off events. [2022-07-19 21:44:48,207 INFO L130 PetriNetUnfolder]: For 2195/2199 co-relation queries the response was YES. [2022-07-19 21:44:48,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 549 events. 182/549 cut-off events. For 2195/2199 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2995 event pairs, 36 based on Foata normal form. 3/543 useless extension candidates. Maximal degree in co-relation 2023. Up to 163 conditions per place. [2022-07-19 21:44:48,213 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 38 changer transitions 8/154 dead transitions. [2022-07-19 21:44:48,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 154 transitions, 1287 flow [2022-07-19 21:44:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-07-19 21:44:48,218 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-07-19 21:44:48,218 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-07-19 21:44:48,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-07-19 21:44:48,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:48,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-07-19 21:44:48,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 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 21:44:48,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:48,223 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:48,223 INFO L186 Difference]: Start difference. First operand has 142 places, 126 transitions, 927 flow. Second operand 14 states and 791 transitions. [2022-07-19 21:44:48,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 154 transitions, 1287 flow [2022-07-19 21:44:48,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 154 transitions, 1191 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:48,235 INFO L242 Difference]: Finished difference. Result has 143 places, 124 transitions, 895 flow [2022-07-19 21:44:48,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=895, PETRI_PLACES=143, PETRI_TRANSITIONS=124} [2022-07-19 21:44:48,236 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-07-19 21:44:48,236 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 124 transitions, 895 flow [2022-07-19 21:44:48,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:48,236 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:48,236 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] [2022-07-19 21:44:48,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:44:48,237 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 21:44:48,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:48,237 INFO L85 PathProgramCache]: Analyzing trace with hash 386002791, now seen corresponding path program 18 times [2022-07-19 21:44:48,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:48,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782095359] [2022-07-19 21:44:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:48,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:48,397 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 21:44:48,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782095359] [2022-07-19 21:44:48,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782095359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:48,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:48,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:48,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283847997] [2022-07-19 21:44:48,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:48,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:48,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:48,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:48,400 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:48,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 124 transitions, 895 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:48,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:48,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:48,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:48,767 INFO L129 PetriNetUnfolder]: 177/518 cut-off events. [2022-07-19 21:44:48,767 INFO L130 PetriNetUnfolder]: For 2182/2184 co-relation queries the response was YES. [2022-07-19 21:44:48,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 518 events. 177/518 cut-off events. For 2182/2184 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2810 event pairs, 45 based on Foata normal form. 1/507 useless extension candidates. Maximal degree in co-relation 1957. Up to 151 conditions per place. [2022-07-19 21:44:48,773 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 40 changer transitions 7/157 dead transitions. [2022-07-19 21:44:48,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1294 flow [2022-07-19 21:44:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-07-19 21:44:48,776 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-07-19 21:44:48,776 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-07-19 21:44:48,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-07-19 21:44:48,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:48,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-07-19 21:44:48,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 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 21:44:48,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:48,780 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:48,780 INFO L186 Difference]: Start difference. First operand has 143 places, 124 transitions, 895 flow. Second operand 14 states and 794 transitions. [2022-07-19 21:44:48,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1294 flow [2022-07-19 21:44:48,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 157 transitions, 1202 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:48,792 INFO L242 Difference]: Finished difference. Result has 143 places, 126 transitions, 924 flow [2022-07-19 21:44:48,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=924, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2022-07-19 21:44:48,792 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-07-19 21:44:48,793 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 924 flow [2022-07-19 21:44:48,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:48,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:48,793 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] [2022-07-19 21:44:48,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 21:44:48,794 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 21:44:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash -730886041, now seen corresponding path program 19 times [2022-07-19 21:44:48,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:48,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077436560] [2022-07-19 21:44:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:48,958 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 21:44:48,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:48,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077436560] [2022-07-19 21:44:48,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077436560] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:48,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:48,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:48,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487118010] [2022-07-19 21:44:48,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:48,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:48,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:48,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:48,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:48,960 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:48,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 924 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:48,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:48,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:48,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:49,309 INFO L129 PetriNetUnfolder]: 183/565 cut-off events. [2022-07-19 21:44:49,310 INFO L130 PetriNetUnfolder]: For 2365/2369 co-relation queries the response was YES. [2022-07-19 21:44:49,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2100 conditions, 565 events. 183/565 cut-off events. For 2365/2369 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3192 event pairs, 39 based on Foata normal form. 3/560 useless extension candidates. Maximal degree in co-relation 2060. Up to 159 conditions per place. [2022-07-19 21:44:49,317 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 73 selfloop transitions, 38 changer transitions 8/160 dead transitions. [2022-07-19 21:44:49,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 160 transitions, 1329 flow [2022-07-19 21:44:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-07-19 21:44:49,319 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-07-19 21:44:49,319 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-07-19 21:44:49,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-07-19 21:44:49,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:49,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-07-19 21:44:49,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 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 21:44:49,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:49,330 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:49,330 INFO L186 Difference]: Start difference. First operand has 143 places, 126 transitions, 924 flow. Second operand 14 states and 796 transitions. [2022-07-19 21:44:49,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 160 transitions, 1329 flow [2022-07-19 21:44:49,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 160 transitions, 1233 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:49,342 INFO L242 Difference]: Finished difference. Result has 145 places, 127 transitions, 932 flow [2022-07-19 21:44:49,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=932, PETRI_PLACES=145, PETRI_TRANSITIONS=127} [2022-07-19 21:44:49,344 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-07-19 21:44:49,344 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 127 transitions, 932 flow [2022-07-19 21:44:49,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:49,344 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:49,344 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] [2022-07-19 21:44:49,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 21:44:49,345 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 21:44:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:49,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1585546923, now seen corresponding path program 20 times [2022-07-19 21:44:49,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:49,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057305301] [2022-07-19 21:44:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:49,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:49,528 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 21:44:49,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:49,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057305301] [2022-07-19 21:44:49,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057305301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:49,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:49,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:44:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837789043] [2022-07-19 21:44:49,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:49,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:44:49,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:44:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:44:49,531 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:44:49,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 127 transitions, 932 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:49,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:49,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:44:49,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:49,848 INFO L129 PetriNetUnfolder]: 180/558 cut-off events. [2022-07-19 21:44:49,848 INFO L130 PetriNetUnfolder]: For 2427/2431 co-relation queries the response was YES. [2022-07-19 21:44:49,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 558 events. 180/558 cut-off events. For 2427/2431 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3103 event pairs, 39 based on Foata normal form. 3/553 useless extension candidates. Maximal degree in co-relation 2058. Up to 167 conditions per place. [2022-07-19 21:44:49,855 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 36 changer transitions 8/154 dead transitions. [2022-07-19 21:44:49,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 1291 flow [2022-07-19 21:44:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:44:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:44:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-07-19 21:44:49,858 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-07-19 21:44:49,858 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-07-19 21:44:49,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-07-19 21:44:49,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:49,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-07-19 21:44:49,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 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 21:44:49,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:49,865 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 21:44:49,865 INFO L186 Difference]: Start difference. First operand has 145 places, 127 transitions, 932 flow. Second operand 14 states and 790 transitions. [2022-07-19 21:44:49,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 1291 flow [2022-07-19 21:44:49,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 154 transitions, 1197 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:49,877 INFO L242 Difference]: Finished difference. Result has 145 places, 124 transitions, 885 flow [2022-07-19 21:44:49,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=885, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2022-07-19 21:44:49,879 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-07-19 21:44:49,879 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 885 flow [2022-07-19 21:44:49,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 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 21:44:49,879 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:49,880 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] [2022-07-19 21:44:49,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:44:49,880 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 21:44:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash -859363161, now seen corresponding path program 1 times [2022-07-19 21:44:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:49,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629699] [2022-07-19 21:44:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:49,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:49,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629699] [2022-07-19 21:44:49,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:49,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168025813] [2022-07-19 21:44:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:49,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:49,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:49,915 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 21:44:49,945 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 21:44:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:49,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:44:50,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:50,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:50,128 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 21:44:50,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168025813] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:50,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:44:50,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-07-19 21:44:50,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353563047] [2022-07-19 21:44:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:50,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:50,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:50,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:50,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:44:50,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:50,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 885 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:50,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:50,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:50,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:50,258 INFO L129 PetriNetUnfolder]: 187/539 cut-off events. [2022-07-19 21:44:50,258 INFO L130 PetriNetUnfolder]: For 2641/2643 co-relation queries the response was YES. [2022-07-19 21:44:50,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2090 conditions, 539 events. 187/539 cut-off events. For 2641/2643 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2886 event pairs, 14 based on Foata normal form. 8/541 useless extension candidates. Maximal degree in co-relation 2047. Up to 139 conditions per place. [2022-07-19 21:44:50,265 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 92 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2022-07-19 21:44:50,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 176 transitions, 1659 flow [2022-07-19 21:44:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:44:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:44:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-07-19 21:44:50,266 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-07-19 21:44:50,267 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-07-19 21:44:50,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-07-19 21:44:50,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:50,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-07-19 21:44:50,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 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 21:44:50,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 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 21:44:50,269 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 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 21:44:50,269 INFO L186 Difference]: Start difference. First operand has 145 places, 124 transitions, 885 flow. Second operand 7 states and 483 transitions. [2022-07-19 21:44:50,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 176 transitions, 1659 flow [2022-07-19 21:44:50,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 176 transitions, 1537 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-07-19 21:44:50,280 INFO L242 Difference]: Finished difference. Result has 136 places, 139 transitions, 1049 flow [2022-07-19 21:44:50,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1049, PETRI_PLACES=136, PETRI_TRANSITIONS=139} [2022-07-19 21:44:50,281 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-07-19 21:44:50,282 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 139 transitions, 1049 flow [2022-07-19 21:44:50,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:50,282 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:50,282 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] [2022-07-19 21:44:50,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:44:50,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-19 21:44:50,499 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 21:44:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:50,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1370591913, now seen corresponding path program 2 times [2022-07-19 21:44:50,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:50,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205428730] [2022-07-19 21:44:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:50,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:50,526 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 21:44:50,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:50,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205428730] [2022-07-19 21:44:50,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205428730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:50,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:50,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:44:50,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828749375] [2022-07-19 21:44:50,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:50,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:50,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:44:50,529 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:50,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 139 transitions, 1049 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:50,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:50,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:50,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:50,679 INFO L129 PetriNetUnfolder]: 219/656 cut-off events. [2022-07-19 21:44:50,679 INFO L130 PetriNetUnfolder]: For 3315/3326 co-relation queries the response was YES. [2022-07-19 21:44:50,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 656 events. 219/656 cut-off events. For 3315/3326 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3838 event pairs, 53 based on Foata normal form. 4/651 useless extension candidates. Maximal degree in co-relation 2358. Up to 144 conditions per place. [2022-07-19 21:44:50,687 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 104 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2022-07-19 21:44:50,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 1835 flow [2022-07-19 21:44:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:44:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:44:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 561 transitions. [2022-07-19 21:44:50,689 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8060344827586207 [2022-07-19 21:44:50,689 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 561 transitions. [2022-07-19 21:44:50,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 561 transitions. [2022-07-19 21:44:50,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:50,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 561 transitions. [2022-07-19 21:44:50,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 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 21:44:50,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:44:50,691 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:44:50,692 INFO L186 Difference]: Start difference. First operand has 136 places, 139 transitions, 1049 flow. Second operand 8 states and 561 transitions. [2022-07-19 21:44:50,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 1835 flow [2022-07-19 21:44:50,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 1789 flow, removed 23 selfloop flow, removed 0 redundant places. [2022-07-19 21:44:50,709 INFO L242 Difference]: Finished difference. Result has 149 places, 156 transitions, 1411 flow [2022-07-19 21:44:50,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1411, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2022-07-19 21:44:50,710 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 72 predicate places. [2022-07-19 21:44:50,710 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1411 flow [2022-07-19 21:44:50,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:50,711 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:50,711 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] [2022-07-19 21:44:50,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 21:44:50,711 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash -212945927, now seen corresponding path program 1 times [2022-07-19 21:44:50,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:50,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583702465] [2022-07-19 21:44:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:50,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:50,737 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 21:44:50,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:50,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583702465] [2022-07-19 21:44:50,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583702465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:50,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:50,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:44:50,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029311298] [2022-07-19 21:44:50,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:50,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:50,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:44:50,739 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:50,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1411 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:50,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:50,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:50,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:50,898 INFO L129 PetriNetUnfolder]: 208/637 cut-off events. [2022-07-19 21:44:50,899 INFO L130 PetriNetUnfolder]: For 4280/4291 co-relation queries the response was YES. [2022-07-19 21:44:50,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 637 events. 208/637 cut-off events. For 4280/4291 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3705 event pairs, 47 based on Foata normal form. 8/637 useless extension candidates. Maximal degree in co-relation 2434. Up to 155 conditions per place. [2022-07-19 21:44:50,907 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 102 selfloop transitions, 30 changer transitions 5/186 dead transitions. [2022-07-19 21:44:50,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 186 transitions, 1898 flow [2022-07-19 21:44:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:44:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:44:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2022-07-19 21:44:50,909 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2022-07-19 21:44:50,909 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2022-07-19 21:44:50,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2022-07-19 21:44:50,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:50,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2022-07-19 21:44:50,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 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 21:44:50,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 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 21:44:50,911 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 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 21:44:50,911 INFO L186 Difference]: Start difference. First operand has 149 places, 156 transitions, 1411 flow. Second operand 7 states and 486 transitions. [2022-07-19 21:44:50,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 186 transitions, 1898 flow [2022-07-19 21:44:50,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 186 transitions, 1854 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-07-19 21:44:50,932 INFO L242 Difference]: Finished difference. Result has 153 places, 155 transitions, 1421 flow [2022-07-19 21:44:50,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1421, PETRI_PLACES=153, PETRI_TRANSITIONS=155} [2022-07-19 21:44:50,933 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 76 predicate places. [2022-07-19 21:44:50,933 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 155 transitions, 1421 flow [2022-07-19 21:44:50,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:50,934 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:50,934 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] [2022-07-19 21:44:50,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 21:44:50,934 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash -599915105, now seen corresponding path program 2 times [2022-07-19 21:44:50,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:50,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240552298] [2022-07-19 21:44:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:50,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:50,960 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 21:44:50,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:50,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240552298] [2022-07-19 21:44:50,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240552298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:50,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:50,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:44:50,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68274531] [2022-07-19 21:44:50,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:50,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:50,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:44:50,964 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:50,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 155 transitions, 1421 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:50,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:50,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:50,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:51,129 INFO L129 PetriNetUnfolder]: 228/704 cut-off events. [2022-07-19 21:44:51,129 INFO L130 PetriNetUnfolder]: For 5033/5043 co-relation queries the response was YES. [2022-07-19 21:44:51,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2980 conditions, 704 events. 228/704 cut-off events. For 5033/5043 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4219 event pairs, 54 based on Foata normal form. 11/708 useless extension candidates. Maximal degree in co-relation 2641. Up to 172 conditions per place. [2022-07-19 21:44:51,138 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 128 selfloop transitions, 45 changer transitions 2/224 dead transitions. [2022-07-19 21:44:51,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 224 transitions, 2406 flow [2022-07-19 21:44:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:44:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:44:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 566 transitions. [2022-07-19 21:44:51,140 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8132183908045977 [2022-07-19 21:44:51,140 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 566 transitions. [2022-07-19 21:44:51,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 566 transitions. [2022-07-19 21:44:51,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:51,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 566 transitions. [2022-07-19 21:44:51,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 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 21:44:51,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:44:51,144 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:44:51,144 INFO L186 Difference]: Start difference. First operand has 153 places, 155 transitions, 1421 flow. Second operand 8 states and 566 transitions. [2022-07-19 21:44:51,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 224 transitions, 2406 flow [2022-07-19 21:44:51,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 224 transitions, 2316 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-07-19 21:44:51,165 INFO L242 Difference]: Finished difference. Result has 157 places, 170 transitions, 1698 flow [2022-07-19 21:44:51,165 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1698, PETRI_PLACES=157, PETRI_TRANSITIONS=170} [2022-07-19 21:44:51,166 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 80 predicate places. [2022-07-19 21:44:51,166 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 170 transitions, 1698 flow [2022-07-19 21:44:51,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:51,167 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:51,167 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] [2022-07-19 21:44:51,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 21:44:51,167 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:51,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1443454513, now seen corresponding path program 3 times [2022-07-19 21:44:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:51,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052444718] [2022-07-19 21:44:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:51,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:51,193 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 21:44:51,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:51,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052444718] [2022-07-19 21:44:51,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052444718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:51,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:51,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:44:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461163945] [2022-07-19 21:44:51,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:51,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:51,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:44:51,196 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:51,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 170 transitions, 1698 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:51,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:51,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:51,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:51,373 INFO L129 PetriNetUnfolder]: 261/781 cut-off events. [2022-07-19 21:44:51,374 INFO L130 PetriNetUnfolder]: For 5858/5858 co-relation queries the response was YES. [2022-07-19 21:44:51,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3445 conditions, 781 events. 261/781 cut-off events. For 5858/5858 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4724 event pairs, 38 based on Foata normal form. 9/784 useless extension candidates. Maximal degree in co-relation 3285. Up to 129 conditions per place. [2022-07-19 21:44:51,386 INFO L132 encePairwiseOnDemand]: 77/87 looper letters, 100 selfloop transitions, 98 changer transitions 4/251 dead transitions. [2022-07-19 21:44:51,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 251 transitions, 2992 flow [2022-07-19 21:44:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:44:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:44:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2022-07-19 21:44:51,388 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7879948914431673 [2022-07-19 21:44:51,388 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 617 transitions. [2022-07-19 21:44:51,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 617 transitions. [2022-07-19 21:44:51,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:51,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 617 transitions. [2022-07-19 21:44:51,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 68.55555555555556) internal successors, (617), 9 states have internal predecessors, (617), 0 states have call successors, (0), 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 21:44:51,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 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 21:44:51,391 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 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 21:44:51,391 INFO L186 Difference]: Start difference. First operand has 157 places, 170 transitions, 1698 flow. Second operand 9 states and 617 transitions. [2022-07-19 21:44:51,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 251 transitions, 2992 flow [2022-07-19 21:44:51,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 251 transitions, 2924 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-07-19 21:44:51,418 INFO L242 Difference]: Finished difference. Result has 170 places, 212 transitions, 2574 flow [2022-07-19 21:44:51,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2574, PETRI_PLACES=170, PETRI_TRANSITIONS=212} [2022-07-19 21:44:51,419 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2022-07-19 21:44:51,419 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 212 transitions, 2574 flow [2022-07-19 21:44:51,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:51,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:51,420 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] [2022-07-19 21:44:51,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 21:44:51,421 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:51,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1098800831, now seen corresponding path program 3 times [2022-07-19 21:44:51,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:51,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498428181] [2022-07-19 21:44:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:51,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:51,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:51,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498428181] [2022-07-19 21:44:51,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498428181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:51,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148591535] [2022-07-19 21:44:51,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:44:51,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:51,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:51,454 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 21:44:51,468 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 21:44:51,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:44:51,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:51,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:44:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:51,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:51,594 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 21:44:51,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148591535] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:51,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:44:51,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-07-19 21:44:51,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932247093] [2022-07-19 21:44:51,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:51,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:51,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:44:51,596 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:51,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 212 transitions, 2574 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:51,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:51,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:51,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:51,814 INFO L129 PetriNetUnfolder]: 280/916 cut-off events. [2022-07-19 21:44:51,815 INFO L130 PetriNetUnfolder]: For 8432/8444 co-relation queries the response was YES. [2022-07-19 21:44:51,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4124 conditions, 916 events. 280/916 cut-off events. For 8432/8444 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5987 event pairs, 49 based on Foata normal form. 12/917 useless extension candidates. Maximal degree in co-relation 3958. Up to 181 conditions per place. [2022-07-19 21:44:51,833 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 117 selfloop transitions, 99 changer transitions 2/267 dead transitions. [2022-07-19 21:44:51,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 267 transitions, 3605 flow [2022-07-19 21:44:51,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:44:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:44:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 428 transitions. [2022-07-19 21:44:51,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8199233716475096 [2022-07-19 21:44:51,835 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 428 transitions. [2022-07-19 21:44:51,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 428 transitions. [2022-07-19 21:44:51,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:51,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 428 transitions. [2022-07-19 21:44:51,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.33333333333333) internal successors, (428), 6 states have internal predecessors, (428), 0 states have call successors, (0), 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 21:44:51,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 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 21:44:51,837 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 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 21:44:51,837 INFO L186 Difference]: Start difference. First operand has 170 places, 212 transitions, 2574 flow. Second operand 6 states and 428 transitions. [2022-07-19 21:44:51,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 267 transitions, 3605 flow [2022-07-19 21:44:51,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 267 transitions, 3491 flow, removed 45 selfloop flow, removed 3 redundant places. [2022-07-19 21:44:51,870 INFO L242 Difference]: Finished difference. Result has 177 places, 229 transitions, 3140 flow [2022-07-19 21:44:51,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3140, PETRI_PLACES=177, PETRI_TRANSITIONS=229} [2022-07-19 21:44:51,871 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 100 predicate places. [2022-07-19 21:44:51,871 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 229 transitions, 3140 flow [2022-07-19 21:44:51,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:51,872 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:51,872 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] [2022-07-19 21:44:51,899 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 21:44:52,086 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,SelfDestructingSolverStorable25 [2022-07-19 21:44:52,087 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:52,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1249889045, now seen corresponding path program 4 times [2022-07-19 21:44:52,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:52,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349972263] [2022-07-19 21:44:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:52,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:52,116 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 21:44:52,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:52,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349972263] [2022-07-19 21:44:52,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349972263] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:52,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:52,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:44:52,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972107476] [2022-07-19 21:44:52,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:52,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:52,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:52,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:52,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:44:52,119 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:52,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 229 transitions, 3140 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:52,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:52,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:52,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:52,334 INFO L129 PetriNetUnfolder]: 265/851 cut-off events. [2022-07-19 21:44:52,335 INFO L130 PetriNetUnfolder]: For 9579/9608 co-relation queries the response was YES. [2022-07-19 21:44:52,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4160 conditions, 851 events. 265/851 cut-off events. For 9579/9608 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5350 event pairs, 55 based on Foata normal form. 5/847 useless extension candidates. Maximal degree in co-relation 4067. Up to 224 conditions per place. [2022-07-19 21:44:52,346 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 150 selfloop transitions, 59 changer transitions 5/263 dead transitions. [2022-07-19 21:44:52,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 263 transitions, 3808 flow [2022-07-19 21:44:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:44:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:44:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 554 transitions. [2022-07-19 21:44:52,348 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-07-19 21:44:52,348 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 554 transitions. [2022-07-19 21:44:52,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 554 transitions. [2022-07-19 21:44:52,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:52,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 554 transitions. [2022-07-19 21:44:52,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:44:52,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:44:52,351 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:44:52,351 INFO L186 Difference]: Start difference. First operand has 177 places, 229 transitions, 3140 flow. Second operand 8 states and 554 transitions. [2022-07-19 21:44:52,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 263 transitions, 3808 flow [2022-07-19 21:44:52,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 263 transitions, 3727 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-19 21:44:52,393 INFO L242 Difference]: Finished difference. Result has 181 places, 231 transitions, 3280 flow [2022-07-19 21:44:52,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3280, PETRI_PLACES=181, PETRI_TRANSITIONS=231} [2022-07-19 21:44:52,394 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 104 predicate places. [2022-07-19 21:44:52,394 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 3280 flow [2022-07-19 21:44:52,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:52,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:52,395 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] [2022-07-19 21:44:52,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-19 21:44:52,395 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1263025475, now seen corresponding path program 5 times [2022-07-19 21:44:52,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:52,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063841452] [2022-07-19 21:44:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:52,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:52,430 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 21:44:52,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:52,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063841452] [2022-07-19 21:44:52,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063841452] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:52,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:52,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:44:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452733295] [2022-07-19 21:44:52,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:52,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:44:52,433 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:52,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 3280 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:52,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:52,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:52,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:52,683 INFO L129 PetriNetUnfolder]: 246/770 cut-off events. [2022-07-19 21:44:52,683 INFO L130 PetriNetUnfolder]: For 9863/9881 co-relation queries the response was YES. [2022-07-19 21:44:52,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3940 conditions, 770 events. 246/770 cut-off events. For 9863/9881 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4618 event pairs, 48 based on Foata normal form. 8/769 useless extension candidates. Maximal degree in co-relation 3854. Up to 190 conditions per place. [2022-07-19 21:44:52,692 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 118 selfloop transitions, 92 changer transitions 2/261 dead transitions. [2022-07-19 21:44:52,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 261 transitions, 3873 flow [2022-07-19 21:44:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:44:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:44:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2022-07-19 21:44:52,694 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-07-19 21:44:52,694 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2022-07-19 21:44:52,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2022-07-19 21:44:52,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:52,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2022-07-19 21:44:52,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:44:52,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:44:52,697 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:44:52,697 INFO L186 Difference]: Start difference. First operand has 181 places, 231 transitions, 3280 flow. Second operand 8 states and 568 transitions. [2022-07-19 21:44:52,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 261 transitions, 3873 flow [2022-07-19 21:44:52,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 261 transitions, 3741 flow, removed 16 selfloop flow, removed 10 redundant places. [2022-07-19 21:44:52,736 INFO L242 Difference]: Finished difference. Result has 176 places, 224 transitions, 3209 flow [2022-07-19 21:44:52,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3209, PETRI_PLACES=176, PETRI_TRANSITIONS=224} [2022-07-19 21:44:52,737 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2022-07-19 21:44:52,737 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 224 transitions, 3209 flow [2022-07-19 21:44:52,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:52,738 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:52,738 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] [2022-07-19 21:44:52,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 21:44:52,738 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:52,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1192658001, now seen corresponding path program 4 times [2022-07-19 21:44:52,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:52,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692179039] [2022-07-19 21:44:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:52,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:52,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:52,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692179039] [2022-07-19 21:44:52,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692179039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:52,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16477630] [2022-07-19 21:44:52,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:44:52,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:52,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:52,776 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 21:44:52,784 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 21:44:52,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:44:52,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:44:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:44:52,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:52,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:52,916 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 21:44:52,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16477630] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:52,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:44:52,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-07-19 21:44:52,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883760553] [2022-07-19 21:44:52,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:52,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:52,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:52,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:44:52,919 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:52,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 224 transitions, 3209 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:52,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:52,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:52,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:53,084 INFO L129 PetriNetUnfolder]: 230/716 cut-off events. [2022-07-19 21:44:53,084 INFO L130 PetriNetUnfolder]: For 9860/9860 co-relation queries the response was YES. [2022-07-19 21:44:53,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3724 conditions, 716 events. 230/716 cut-off events. For 9860/9860 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4115 event pairs, 48 based on Foata normal form. 8/719 useless extension candidates. Maximal degree in co-relation 3508. Up to 229 conditions per place. [2022-07-19 21:44:53,092 INFO L132 encePairwiseOnDemand]: 78/87 looper letters, 132 selfloop transitions, 67 changer transitions 0/248 dead transitions. [2022-07-19 21:44:53,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 248 transitions, 3755 flow [2022-07-19 21:44:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:44:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:44:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2022-07-19 21:44:53,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-07-19 21:44:53,094 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2022-07-19 21:44:53,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2022-07-19 21:44:53,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:53,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2022-07-19 21:44:53,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 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 21:44:53,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 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 21:44:53,096 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 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 21:44:53,096 INFO L186 Difference]: Start difference. First operand has 176 places, 224 transitions, 3209 flow. Second operand 6 states and 426 transitions. [2022-07-19 21:44:53,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 248 transitions, 3755 flow [2022-07-19 21:44:53,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 248 transitions, 3718 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-19 21:44:53,130 INFO L242 Difference]: Finished difference. Result has 182 places, 222 transitions, 3327 flow [2022-07-19 21:44:53,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3327, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2022-07-19 21:44:53,131 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 105 predicate places. [2022-07-19 21:44:53,132 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 3327 flow [2022-07-19 21:44:53,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:53,132 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:53,132 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] [2022-07-19 21:44:53,162 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 21:44:53,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 21:44:53,360 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:53,360 INFO L85 PathProgramCache]: Analyzing trace with hash -736852561, now seen corresponding path program 5 times [2022-07-19 21:44:53,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:53,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545108934] [2022-07-19 21:44:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:53,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:53,388 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 21:44:53,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:53,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545108934] [2022-07-19 21:44:53,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545108934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:53,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:53,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:44:53,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983928046] [2022-07-19 21:44:53,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:53,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:53,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:53,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:53,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:44:53,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:53,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 3327 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:53,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:53,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:53,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:53,559 INFO L129 PetriNetUnfolder]: 225/705 cut-off events. [2022-07-19 21:44:53,559 INFO L130 PetriNetUnfolder]: For 10662/10664 co-relation queries the response was YES. [2022-07-19 21:44:53,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3804 conditions, 705 events. 225/705 cut-off events. For 10662/10664 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4045 event pairs, 60 based on Foata normal form. 3/699 useless extension candidates. Maximal degree in co-relation 3591. Up to 195 conditions per place. [2022-07-19 21:44:53,569 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 151 selfloop transitions, 33 changer transitions 5/238 dead transitions. [2022-07-19 21:44:53,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 238 transitions, 3750 flow [2022-07-19 21:44:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:44:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:44:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-07-19 21:44:53,571 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-07-19 21:44:53,571 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-07-19 21:44:53,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-07-19 21:44:53,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:53,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-07-19 21:44:53,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 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 21:44:53,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 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 21:44:53,573 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 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 21:44:53,574 INFO L186 Difference]: Start difference. First operand has 182 places, 222 transitions, 3327 flow. Second operand 7 states and 483 transitions. [2022-07-19 21:44:53,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 238 transitions, 3750 flow [2022-07-19 21:44:53,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 238 transitions, 3701 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-07-19 21:44:53,613 INFO L242 Difference]: Finished difference. Result has 188 places, 217 transitions, 3202 flow [2022-07-19 21:44:53,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3202, PETRI_PLACES=188, PETRI_TRANSITIONS=217} [2022-07-19 21:44:53,615 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 111 predicate places. [2022-07-19 21:44:53,615 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 217 transitions, 3202 flow [2022-07-19 21:44:53,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:53,615 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:53,615 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] [2022-07-19 21:44:53,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-19 21:44:53,616 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:53,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:53,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1170896073, now seen corresponding path program 6 times [2022-07-19 21:44:53,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:53,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55933865] [2022-07-19 21:44:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:53,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:53,643 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 21:44:53,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:53,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55933865] [2022-07-19 21:44:53,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55933865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:53,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:53,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:44:53,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624320897] [2022-07-19 21:44:53,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:53,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:44:53,645 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:53,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 217 transitions, 3202 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:53,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:53,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:53,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:53,848 INFO L129 PetriNetUnfolder]: 213/644 cut-off events. [2022-07-19 21:44:53,849 INFO L130 PetriNetUnfolder]: For 10179/10181 co-relation queries the response was YES. [2022-07-19 21:44:53,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 644 events. 213/644 cut-off events. For 10179/10181 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3530 event pairs, 52 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 3502. Up to 195 conditions per place. [2022-07-19 21:44:53,856 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 124 selfloop transitions, 49 changer transitions 2/224 dead transitions. [2022-07-19 21:44:53,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 224 transitions, 3472 flow [2022-07-19 21:44:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:44:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:44:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2022-07-19 21:44:53,858 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2022-07-19 21:44:53,858 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2022-07-19 21:44:53,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2022-07-19 21:44:53,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:53,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2022-07-19 21:44:53,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 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 21:44:53,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:44:53,861 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:44:53,861 INFO L186 Difference]: Start difference. First operand has 188 places, 217 transitions, 3202 flow. Second operand 8 states and 550 transitions. [2022-07-19 21:44:53,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 224 transitions, 3472 flow [2022-07-19 21:44:53,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 224 transitions, 3236 flow, removed 8 selfloop flow, removed 9 redundant places. [2022-07-19 21:44:53,895 INFO L242 Difference]: Finished difference. Result has 182 places, 203 transitions, 2861 flow [2022-07-19 21:44:53,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2861, PETRI_PLACES=182, PETRI_TRANSITIONS=203} [2022-07-19 21:44:53,896 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 105 predicate places. [2022-07-19 21:44:53,896 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 203 transitions, 2861 flow [2022-07-19 21:44:53,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:53,897 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:53,897 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] [2022-07-19 21:44:53,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-19 21:44:53,898 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1496756239, now seen corresponding path program 6 times [2022-07-19 21:44:53,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:53,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237301922] [2022-07-19 21:44:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:53,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:53,926 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 21:44:53,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:53,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237301922] [2022-07-19 21:44:53,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237301922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:44:53,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:44:53,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:44:53,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049060621] [2022-07-19 21:44:53,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:44:53,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:44:53,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:53,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:44:53,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:44:53,929 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-07-19 21:44:53,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 203 transitions, 2861 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:53,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:53,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-07-19 21:44:53,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:44:54,079 INFO L129 PetriNetUnfolder]: 196/570 cut-off events. [2022-07-19 21:44:54,079 INFO L130 PetriNetUnfolder]: For 8353/8355 co-relation queries the response was YES. [2022-07-19 21:44:54,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3150 conditions, 570 events. 196/570 cut-off events. For 8353/8355 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2872 event pairs, 39 based on Foata normal form. 3/567 useless extension candidates. Maximal degree in co-relation 3110. Up to 190 conditions per place. [2022-07-19 21:44:54,087 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 109 selfloop transitions, 45 changer transitions 3/206 dead transitions. [2022-07-19 21:44:54,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 206 transitions, 3042 flow [2022-07-19 21:44:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:44:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:44:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2022-07-19 21:44:54,089 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2022-07-19 21:44:54,089 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2022-07-19 21:44:54,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2022-07-19 21:44:54,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:44:54,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2022-07-19 21:44:54,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 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 21:44:54,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 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 21:44:54,091 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 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 21:44:54,091 INFO L186 Difference]: Start difference. First operand has 182 places, 203 transitions, 2861 flow. Second operand 7 states and 480 transitions. [2022-07-19 21:44:54,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 206 transitions, 3042 flow [2022-07-19 21:44:54,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 206 transitions, 2918 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-07-19 21:44:54,120 INFO L242 Difference]: Finished difference. Result has 170 places, 189 transitions, 2602 flow [2022-07-19 21:44:54,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2602, PETRI_PLACES=170, PETRI_TRANSITIONS=189} [2022-07-19 21:44:54,121 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 93 predicate places. [2022-07-19 21:44:54,121 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 189 transitions, 2602 flow [2022-07-19 21:44:54,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 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 21:44:54,122 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:44:54,122 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] [2022-07-19 21:44:54,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-19 21:44:54,122 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:44:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:44:54,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008755, now seen corresponding path program 1 times [2022-07-19 21:44:54,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:44:54,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932010070] [2022-07-19 21:44:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:54,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:44:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:54,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:44:54,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932010070] [2022-07-19 21:44:54,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932010070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:44:54,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981291811] [2022-07-19 21:44:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:44:54,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:44:54,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:44:54,292 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 21:44:54,317 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 21:44:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:44:54,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:44:54,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:44:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:54,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:44:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:44:55,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981291811] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:44:55,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:44:55,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:44:55,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708770047] [2022-07-19 21:44:55,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:44:55,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:44:55,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:44:55,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:44:55,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:44:55,219 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:44:55,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 189 transitions, 2602 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 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 21:44:55,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:44:55,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:44:55,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:05,563 INFO L129 PetriNetUnfolder]: 972/2287 cut-off events. [2022-07-19 21:45:05,564 INFO L130 PetriNetUnfolder]: For 31601/31601 co-relation queries the response was YES. [2022-07-19 21:45:05,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12769 conditions, 2287 events. 972/2287 cut-off events. For 31601/31601 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15565 event pairs, 33 based on Foata normal form. 3/2277 useless extension candidates. Maximal degree in co-relation 12733. Up to 363 conditions per place. [2022-07-19 21:45:05,595 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 247 selfloop transitions, 857 changer transitions 17/1160 dead transitions. [2022-07-19 21:45:05,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1160 transitions, 16998 flow [2022-07-19 21:45:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-07-19 21:45:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2022-07-19 21:45:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2022-07-19 21:45:05,610 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2022-07-19 21:45:05,610 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2022-07-19 21:45:05,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2022-07-19 21:45:05,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:05,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2022-07-19 21:45:05,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 0 states have call successors, (0), 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 21:45:05,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 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 21:45:05,665 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 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 21:45:05,665 INFO L186 Difference]: Start difference. First operand has 170 places, 189 transitions, 2602 flow. Second operand 224 states and 11784 transitions. [2022-07-19 21:45:05,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1160 transitions, 16998 flow [2022-07-19 21:45:05,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1160 transitions, 16169 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-19 21:45:05,758 INFO L242 Difference]: Finished difference. Result has 439 places, 991 transitions, 15237 flow [2022-07-19 21:45:05,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=15237, PETRI_PLACES=439, PETRI_TRANSITIONS=991} [2022-07-19 21:45:05,760 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 362 predicate places. [2022-07-19 21:45:05,760 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 991 transitions, 15237 flow [2022-07-19 21:45:05,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 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 21:45:05,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:05,761 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] [2022-07-19 21:45:05,787 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 21:45:05,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:05,983 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash -950751903, now seen corresponding path program 2 times [2022-07-19 21:45:05,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:05,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569268312] [2022-07-19 21:45:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:05,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:06,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569268312] [2022-07-19 21:45:06,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569268312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:06,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95221067] [2022-07-19 21:45:06,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:45:06,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:06,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:06,136 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 21:45:06,137 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 21:45:06,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:45:06,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:45:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:06,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:07,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95221067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:07,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:07,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:45:07,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095052681] [2022-07-19 21:45:07,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:07,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:45:07,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:45:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:45:07,081 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:45:07,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 991 transitions, 15237 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 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 21:45:07,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:07,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:45:07,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:09,973 INFO L129 PetriNetUnfolder]: 1106/2984 cut-off events. [2022-07-19 21:45:09,974 INFO L130 PetriNetUnfolder]: For 129885/129885 co-relation queries the response was YES. [2022-07-19 21:45:10,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23620 conditions, 2984 events. 1106/2984 cut-off events. For 129885/129885 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24213 event pairs, 48 based on Foata normal form. 1/2974 useless extension candidates. Maximal degree in co-relation 23523. Up to 439 conditions per place. [2022-07-19 21:45:10,027 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 360 selfloop transitions, 764 changer transitions 45/1208 dead transitions. [2022-07-19 21:45:10,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1208 transitions, 22147 flow [2022-07-19 21:45:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-19 21:45:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-19 21:45:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2022-07-19 21:45:10,031 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2022-07-19 21:45:10,032 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2022-07-19 21:45:10,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2022-07-19 21:45:10,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:10,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2022-07-19 21:45:10,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 0 states have call successors, (0), 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 21:45:10,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 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 21:45:10,045 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 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 21:45:10,045 INFO L186 Difference]: Start difference. First operand has 439 places, 991 transitions, 15237 flow. Second operand 64 states and 3489 transitions. [2022-07-19 21:45:10,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1208 transitions, 22147 flow [2022-07-19 21:45:10,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1208 transitions, 20684 flow, removed 458 selfloop flow, removed 15 redundant places. [2022-07-19 21:45:10,540 INFO L242 Difference]: Finished difference. Result has 499 places, 1037 transitions, 16667 flow [2022-07-19 21:45:10,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=13989, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=16667, PETRI_PLACES=499, PETRI_TRANSITIONS=1037} [2022-07-19 21:45:10,542 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 422 predicate places. [2022-07-19 21:45:10,542 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1037 transitions, 16667 flow [2022-07-19 21:45:10,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 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 21:45:10,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:10,543 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] [2022-07-19 21:45:10,566 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 21:45:10,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-19 21:45:10,760 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:10,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:10,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1414684533, now seen corresponding path program 3 times [2022-07-19 21:45:10,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:10,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143433523] [2022-07-19 21:45:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:10,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:10,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:10,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143433523] [2022-07-19 21:45:10,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143433523] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:10,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133986624] [2022-07-19 21:45:10,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:45:10,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:10,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:10,928 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 21:45:10,950 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 21:45:11,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:45:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:11,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:45:11,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:11,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:11,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133986624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:11,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:11,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:45:11,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687138315] [2022-07-19 21:45:11,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:11,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:45:11,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:11,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:45:11,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:45:11,895 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:45:11,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1037 transitions, 16667 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 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 21:45:11,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:11,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:45:11,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:14,780 INFO L129 PetriNetUnfolder]: 1087/2957 cut-off events. [2022-07-19 21:45:14,780 INFO L130 PetriNetUnfolder]: For 149702/149702 co-relation queries the response was YES. [2022-07-19 21:45:14,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24789 conditions, 2957 events. 1087/2957 cut-off events. For 149702/149702 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24079 event pairs, 62 based on Foata normal form. 2/2932 useless extension candidates. Maximal degree in co-relation 24683. Up to 415 conditions per place. [2022-07-19 21:45:14,830 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 339 selfloop transitions, 776 changer transitions 31/1185 dead transitions. [2022-07-19 21:45:14,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 1185 transitions, 22459 flow [2022-07-19 21:45:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-19 21:45:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-19 21:45:14,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2022-07-19 21:45:14,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2022-07-19 21:45:14,834 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2022-07-19 21:45:14,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2022-07-19 21:45:14,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:14,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2022-07-19 21:45:14,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 0 states have call successors, (0), 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 21:45:14,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 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 21:45:14,845 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 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 21:45:14,846 INFO L186 Difference]: Start difference. First operand has 499 places, 1037 transitions, 16667 flow. Second operand 66 states and 3577 transitions. [2022-07-19 21:45:14,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 1185 transitions, 22459 flow [2022-07-19 21:45:15,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1185 transitions, 20689 flow, removed 165 selfloop flow, removed 43 redundant places. [2022-07-19 21:45:15,574 INFO L242 Difference]: Finished difference. Result has 529 places, 1054 transitions, 17180 flow [2022-07-19 21:45:15,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15010, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=760, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=17180, PETRI_PLACES=529, PETRI_TRANSITIONS=1054} [2022-07-19 21:45:15,576 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 452 predicate places. [2022-07-19 21:45:15,577 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 1054 transitions, 17180 flow [2022-07-19 21:45:15,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 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 21:45:15,577 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:15,578 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] [2022-07-19 21:45:15,608 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 21:45:15,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:15,791 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1843164369, now seen corresponding path program 4 times [2022-07-19 21:45:15,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:15,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045727420] [2022-07-19 21:45:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:15,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:15,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:15,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045727420] [2022-07-19 21:45:15,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045727420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:15,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329074926] [2022-07-19 21:45:15,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:45:15,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:15,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:15,960 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 21:45:15,961 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 21:45:16,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:45:16,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:16,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:45:16,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:16,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:16,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329074926] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:16,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:16,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-19 21:45:16,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417228887] [2022-07-19 21:45:16,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:16,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:45:16,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:16,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:45:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:45:16,700 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:45:16,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 1054 transitions, 17180 flow. Second operand has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 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 21:45:16,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:16,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:45:16,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:18,527 INFO L129 PetriNetUnfolder]: 1083/3028 cut-off events. [2022-07-19 21:45:18,527 INFO L130 PetriNetUnfolder]: For 161827/161827 co-relation queries the response was YES. [2022-07-19 21:45:18,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25511 conditions, 3028 events. 1083/3028 cut-off events. For 161827/161827 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25179 event pairs, 103 based on Foata normal form. 3/3002 useless extension candidates. Maximal degree in co-relation 25397. Up to 461 conditions per place. [2022-07-19 21:45:18,583 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 654 selfloop transitions, 463 changer transitions 19/1175 dead transitions. [2022-07-19 21:45:18,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1175 transitions, 22406 flow [2022-07-19 21:45:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 21:45:18,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-19 21:45:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2064 transitions. [2022-07-19 21:45:18,586 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.641192917054986 [2022-07-19 21:45:18,586 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2064 transitions. [2022-07-19 21:45:18,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2064 transitions. [2022-07-19 21:45:18,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:18,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2064 transitions. [2022-07-19 21:45:18,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.78378378378378) internal successors, (2064), 37 states have internal predecessors, (2064), 0 states have call successors, (0), 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 21:45:18,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 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 21:45:18,594 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 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 21:45:18,594 INFO L186 Difference]: Start difference. First operand has 529 places, 1054 transitions, 17180 flow. Second operand 37 states and 2064 transitions. [2022-07-19 21:45:18,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1175 transitions, 22406 flow [2022-07-19 21:45:19,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1175 transitions, 20699 flow, removed 134 selfloop flow, removed 51 redundant places. [2022-07-19 21:45:19,237 INFO L242 Difference]: Finished difference. Result has 511 places, 1069 transitions, 16845 flow [2022-07-19 21:45:19,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15596, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=16845, PETRI_PLACES=511, PETRI_TRANSITIONS=1069} [2022-07-19 21:45:19,239 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 434 predicate places. [2022-07-19 21:45:19,239 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1069 transitions, 16845 flow [2022-07-19 21:45:19,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 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 21:45:19,240 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:19,240 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] [2022-07-19 21:45:19,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 21:45:19,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:19,459 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash -559814149, now seen corresponding path program 5 times [2022-07-19 21:45:19,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:19,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912372975] [2022-07-19 21:45:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:19,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:19,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912372975] [2022-07-19 21:45:19,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912372975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304956219] [2022-07-19 21:45:19,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:45:19,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:19,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:19,629 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 21:45:19,631 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 21:45:19,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:45:19,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:19,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 21:45:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:20,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:20,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304956219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:20,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:20,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-19 21:45:20,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249332194] [2022-07-19 21:45:20,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:20,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:45:20,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:20,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:45:20,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:45:20,387 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:45:20,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1069 transitions, 16845 flow. Second operand has 33 states, 33 states have (on average 50.78787878787879) internal successors, (1676), 33 states have internal predecessors, (1676), 0 states have call successors, (0), 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 21:45:20,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:20,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:45:20,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:22,347 INFO L129 PetriNetUnfolder]: 1141/3135 cut-off events. [2022-07-19 21:45:22,348 INFO L130 PetriNetUnfolder]: For 158536/158536 co-relation queries the response was YES. [2022-07-19 21:45:22,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26198 conditions, 3135 events. 1141/3135 cut-off events. For 158536/158536 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26342 event pairs, 72 based on Foata normal form. 2/3095 useless extension candidates. Maximal degree in co-relation 26086. Up to 620 conditions per place. [2022-07-19 21:45:22,393 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 316 selfloop transitions, 905 changer transitions 21/1281 dead transitions. [2022-07-19 21:45:22,394 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1281 transitions, 23466 flow [2022-07-19 21:45:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:45:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:45:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2440 transitions. [2022-07-19 21:45:22,398 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6232439335887612 [2022-07-19 21:45:22,398 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2440 transitions. [2022-07-19 21:45:22,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2440 transitions. [2022-07-19 21:45:22,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:22,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2440 transitions. [2022-07-19 21:45:22,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 54.22222222222222) internal successors, (2440), 45 states have internal predecessors, (2440), 0 states have call successors, (0), 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 21:45:22,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 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 21:45:22,405 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 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 21:45:22,405 INFO L186 Difference]: Start difference. First operand has 511 places, 1069 transitions, 16845 flow. Second operand 45 states and 2440 transitions. [2022-07-19 21:45:22,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1281 transitions, 23466 flow [2022-07-19 21:45:22,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1281 transitions, 22655 flow, removed 37 selfloop flow, removed 21 redundant places. [2022-07-19 21:45:23,034 INFO L242 Difference]: Finished difference. Result has 550 places, 1182 transitions, 20689 flow [2022-07-19 21:45:23,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16090, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=20689, PETRI_PLACES=550, PETRI_TRANSITIONS=1182} [2022-07-19 21:45:23,035 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 473 predicate places. [2022-07-19 21:45:23,035 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1182 transitions, 20689 flow [2022-07-19 21:45:23,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.78787878787879) internal successors, (1676), 33 states have internal predecessors, (1676), 0 states have call successors, (0), 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 21:45:23,036 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:23,039 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] [2022-07-19 21:45:23,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:45:23,244 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,SelfDestructingSolverStorable36 [2022-07-19 21:45:23,245 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:23,245 INFO L85 PathProgramCache]: Analyzing trace with hash 619738599, now seen corresponding path program 6 times [2022-07-19 21:45:23,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:23,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172185034] [2022-07-19 21:45:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:23,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:23,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:23,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172185034] [2022-07-19 21:45:23,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172185034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:23,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550424676] [2022-07-19 21:45:23,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:45:23,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:23,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:23,442 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 21:45:23,444 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 21:45:23,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:45:23,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:23,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:45:23,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:23,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:24,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550424676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:24,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:24,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:45:24,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103944664] [2022-07-19 21:45:24,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:24,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:45:24,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:24,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:45:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:45:24,262 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:45:24,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1182 transitions, 20689 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 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 21:45:24,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:24,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:45:24,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:27,202 INFO L129 PetriNetUnfolder]: 1186/3337 cut-off events. [2022-07-19 21:45:27,203 INFO L130 PetriNetUnfolder]: For 183553/183553 co-relation queries the response was YES. [2022-07-19 21:45:27,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29532 conditions, 3337 events. 1186/3337 cut-off events. For 183553/183553 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 28275 event pairs, 62 based on Foata normal form. 1/3311 useless extension candidates. Maximal degree in co-relation 29405. Up to 445 conditions per place. [2022-07-19 21:45:27,259 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 447 selfloop transitions, 854 changer transitions 50/1390 dead transitions. [2022-07-19 21:45:27,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 1390 transitions, 29071 flow [2022-07-19 21:45:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 21:45:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-19 21:45:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3349 transitions. [2022-07-19 21:45:27,362 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6310533257961183 [2022-07-19 21:45:27,362 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3349 transitions. [2022-07-19 21:45:27,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3349 transitions. [2022-07-19 21:45:27,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:27,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3349 transitions. [2022-07-19 21:45:27,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.90163934426229) internal successors, (3349), 61 states have internal predecessors, (3349), 0 states have call successors, (0), 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 21:45:27,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 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 21:45:27,370 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 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 21:45:27,371 INFO L186 Difference]: Start difference. First operand has 550 places, 1182 transitions, 20689 flow. Second operand 61 states and 3349 transitions. [2022-07-19 21:45:27,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 1390 transitions, 29071 flow [2022-07-19 21:45:28,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 1390 transitions, 28528 flow, removed 176 selfloop flow, removed 15 redundant places. [2022-07-19 21:45:28,127 INFO L242 Difference]: Finished difference. Result has 609 places, 1216 transitions, 23245 flow [2022-07-19 21:45:28,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=20364, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=23245, PETRI_PLACES=609, PETRI_TRANSITIONS=1216} [2022-07-19 21:45:28,129 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 532 predicate places. [2022-07-19 21:45:28,129 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1216 transitions, 23245 flow [2022-07-19 21:45:28,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 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 21:45:28,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:28,130 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] [2022-07-19 21:45:28,156 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 21:45:28,351 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,SelfDestructingSolverStorable37 [2022-07-19 21:45:28,351 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash 733196829, now seen corresponding path program 7 times [2022-07-19 21:45:28,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:28,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079216415] [2022-07-19 21:45:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:28,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:28,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079216415] [2022-07-19 21:45:28,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079216415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866990835] [2022-07-19 21:45:28,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:45:28,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:28,516 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 21:45:28,535 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 21:45:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:28,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:45:28,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:28,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:29,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866990835] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:29,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:29,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:45:29,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379908040] [2022-07-19 21:45:29,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:29,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:45:29,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:29,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:45:29,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:45:29,383 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:45:29,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1216 transitions, 23245 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 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 21:45:29,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:29,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:45:29,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:33,721 INFO L129 PetriNetUnfolder]: 1221/3437 cut-off events. [2022-07-19 21:45:33,721 INFO L130 PetriNetUnfolder]: For 195893/195893 co-relation queries the response was YES. [2022-07-19 21:45:33,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31895 conditions, 3437 events. 1221/3437 cut-off events. For 195893/195893 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 29677 event pairs, 96 based on Foata normal form. 3/3392 useless extension candidates. Maximal degree in co-relation 31753. Up to 736 conditions per place. [2022-07-19 21:45:33,794 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 354 selfloop transitions, 958 changer transitions 27/1378 dead transitions. [2022-07-19 21:45:33,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 1378 transitions, 30151 flow [2022-07-19 21:45:33,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-19 21:45:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-19 21:45:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5100 transitions. [2022-07-19 21:45:33,801 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.617059891107078 [2022-07-19 21:45:33,801 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5100 transitions. [2022-07-19 21:45:33,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5100 transitions. [2022-07-19 21:45:33,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:33,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5100 transitions. [2022-07-19 21:45:33,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 53.68421052631579) internal successors, (5100), 95 states have internal predecessors, (5100), 0 states have call successors, (0), 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 21:45:33,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 87.0) internal successors, (8352), 96 states have internal predecessors, (8352), 0 states have call successors, (0), 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 21:45:33,820 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 87.0) internal successors, (8352), 96 states have internal predecessors, (8352), 0 states have call successors, (0), 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 21:45:33,821 INFO L186 Difference]: Start difference. First operand has 609 places, 1216 transitions, 23245 flow. Second operand 95 states and 5100 transitions. [2022-07-19 21:45:33,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 1378 transitions, 30151 flow [2022-07-19 21:45:34,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1378 transitions, 29144 flow, removed 70 selfloop flow, removed 36 redundant places. [2022-07-19 21:45:34,836 INFO L242 Difference]: Finished difference. Result has 666 places, 1253 transitions, 25416 flow [2022-07-19 21:45:34,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=22414, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=923, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=25416, PETRI_PLACES=666, PETRI_TRANSITIONS=1253} [2022-07-19 21:45:34,839 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 589 predicate places. [2022-07-19 21:45:34,840 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 1253 transitions, 25416 flow [2022-07-19 21:45:34,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 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 21:45:34,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:34,841 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] [2022-07-19 21:45:34,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-19 21:45:35,042 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,SelfDestructingSolverStorable38 [2022-07-19 21:45:35,043 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash 65432667, now seen corresponding path program 8 times [2022-07-19 21:45:35,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:35,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75698191] [2022-07-19 21:45:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:35,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:35,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:35,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75698191] [2022-07-19 21:45:35,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75698191] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:35,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034141776] [2022-07-19 21:45:35,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:45:35,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:35,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:35,216 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 21:45:35,217 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 21:45:35,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:45:35,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:35,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:45:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:35,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:35,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034141776] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:35,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:35,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:45:35,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079993843] [2022-07-19 21:45:35,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:35,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:45:35,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:35,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:45:35,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:45:35,959 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:45:35,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 1253 transitions, 25416 flow. Second operand has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 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 21:45:35,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:35,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:45:35,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:38,817 INFO L129 PetriNetUnfolder]: 1364/3834 cut-off events. [2022-07-19 21:45:38,818 INFO L130 PetriNetUnfolder]: For 217236/217236 co-relation queries the response was YES. [2022-07-19 21:45:38,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36359 conditions, 3834 events. 1364/3834 cut-off events. For 217236/217236 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33644 event pairs, 84 based on Foata normal form. 4/3792 useless extension candidates. Maximal degree in co-relation 36207. Up to 663 conditions per place. [2022-07-19 21:45:38,893 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 292 selfloop transitions, 1283 changer transitions 19/1633 dead transitions. [2022-07-19 21:45:38,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1633 transitions, 36148 flow [2022-07-19 21:45:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 21:45:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-19 21:45:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3187 transitions. [2022-07-19 21:45:38,895 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6105363984674329 [2022-07-19 21:45:38,895 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3187 transitions. [2022-07-19 21:45:38,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3187 transitions. [2022-07-19 21:45:38,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:38,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3187 transitions. [2022-07-19 21:45:38,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 53.11666666666667) internal successors, (3187), 60 states have internal predecessors, (3187), 0 states have call successors, (0), 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 21:45:38,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 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 21:45:38,903 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 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 21:45:38,903 INFO L186 Difference]: Start difference. First operand has 666 places, 1253 transitions, 25416 flow. Second operand 60 states and 3187 transitions. [2022-07-19 21:45:38,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1633 transitions, 36148 flow [2022-07-19 21:45:40,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 1633 transitions, 34246 flow, removed 44 selfloop flow, removed 72 redundant places. [2022-07-19 21:45:40,068 INFO L242 Difference]: Finished difference. Result has 672 places, 1557 transitions, 33902 flow [2022-07-19 21:45:40,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23931, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=984, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=33902, PETRI_PLACES=672, PETRI_TRANSITIONS=1557} [2022-07-19 21:45:40,070 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 595 predicate places. [2022-07-19 21:45:40,070 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1557 transitions, 33902 flow [2022-07-19 21:45:40,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 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 21:45:40,071 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:40,071 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] [2022-07-19 21:45:40,098 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 21:45:40,287 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,SelfDestructingSolverStorable39 [2022-07-19 21:45:40,287 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1800442661, now seen corresponding path program 9 times [2022-07-19 21:45:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:40,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541155860] [2022-07-19 21:45:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:40,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:40,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:40,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541155860] [2022-07-19 21:45:40,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541155860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:40,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111329945] [2022-07-19 21:45:40,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:45:40,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:40,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:40,447 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 21:45:40,448 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 21:45:40,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:45:40,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:40,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:45:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:40,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:41,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111329945] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:41,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:41,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:45:41,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577059561] [2022-07-19 21:45:41,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:41,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:45:41,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:45:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:45:41,230 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:45:41,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1557 transitions, 33902 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 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 21:45:41,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:41,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:45:41,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:48,447 INFO L129 PetriNetUnfolder]: 1393/3839 cut-off events. [2022-07-19 21:45:48,447 INFO L130 PetriNetUnfolder]: For 271221/271221 co-relation queries the response was YES. [2022-07-19 21:45:48,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40393 conditions, 3839 events. 1393/3839 cut-off events. For 271221/271221 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 33713 event pairs, 106 based on Foata normal form. 3/3787 useless extension candidates. Maximal degree in co-relation 40225. Up to 924 conditions per place. [2022-07-19 21:45:48,533 INFO L132 encePairwiseOnDemand]: 65/87 looper letters, 382 selfloop transitions, 1278 changer transitions 28/1727 dead transitions. [2022-07-19 21:45:48,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 1727 transitions, 42932 flow [2022-07-19 21:45:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-07-19 21:45:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-07-19 21:45:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 7704 transitions. [2022-07-19 21:45:48,538 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6065186584789797 [2022-07-19 21:45:48,538 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 7704 transitions. [2022-07-19 21:45:48,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 7704 transitions. [2022-07-19 21:45:48,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:48,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 7704 transitions. [2022-07-19 21:45:48,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 52.76712328767123) internal successors, (7704), 146 states have internal predecessors, (7704), 0 states have call successors, (0), 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 21:45:48,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 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 21:45:48,561 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 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 21:45:48,561 INFO L186 Difference]: Start difference. First operand has 672 places, 1557 transitions, 33902 flow. Second operand 146 states and 7704 transitions. [2022-07-19 21:45:48,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 1727 transitions, 42932 flow [2022-07-19 21:45:50,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 1727 transitions, 41156 flow, removed 779 selfloop flow, removed 19 redundant places. [2022-07-19 21:45:50,352 INFO L242 Difference]: Finished difference. Result has 813 places, 1575 transitions, 36645 flow [2022-07-19 21:45:50,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=33228, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=36645, PETRI_PLACES=813, PETRI_TRANSITIONS=1575} [2022-07-19 21:45:50,354 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 736 predicate places. [2022-07-19 21:45:50,355 INFO L495 AbstractCegarLoop]: Abstraction has has 813 places, 1575 transitions, 36645 flow [2022-07-19 21:45:50,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 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 21:45:50,355 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:50,355 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] [2022-07-19 21:45:50,381 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 21:45:50,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:50,571 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:50,572 INFO L85 PathProgramCache]: Analyzing trace with hash 959815931, now seen corresponding path program 10 times [2022-07-19 21:45:50,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:50,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706057163] [2022-07-19 21:45:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:50,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:50,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:50,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706057163] [2022-07-19 21:45:50,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706057163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:50,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003524219] [2022-07-19 21:45:50,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:45:50,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:50,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:50,740 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 21:45:50,741 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 21:45:50,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:45:50,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:50,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:45:50,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:51,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:51,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003524219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:51,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:51,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-19 21:45:51,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234621757] [2022-07-19 21:45:51,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:51,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:45:51,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:45:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:45:51,444 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:45:51,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 813 places, 1575 transitions, 36645 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 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 21:45:51,445 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:51,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:45:51,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:56,444 INFO L129 PetriNetUnfolder]: 1473/4010 cut-off events. [2022-07-19 21:45:56,444 INFO L130 PetriNetUnfolder]: For 246913/246913 co-relation queries the response was YES. [2022-07-19 21:45:56,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41945 conditions, 4010 events. 1473/4010 cut-off events. For 246913/246913 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 35474 event pairs, 194 based on Foata normal form. 2/3945 useless extension candidates. Maximal degree in co-relation 41764. Up to 1060 conditions per place. [2022-07-19 21:45:56,531 INFO L132 encePairwiseOnDemand]: 67/87 looper letters, 775 selfloop transitions, 1007 changer transitions 13/1834 dead transitions. [2022-07-19 21:45:56,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 903 places, 1834 transitions, 46444 flow [2022-07-19 21:45:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-19 21:45:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-07-19 21:45:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 5376 transitions. [2022-07-19 21:45:56,535 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6118129054284739 [2022-07-19 21:45:56,536 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 5376 transitions. [2022-07-19 21:45:56,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 5376 transitions. [2022-07-19 21:45:56,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:56,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 5376 transitions. [2022-07-19 21:45:56,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 53.227722772277225) internal successors, (5376), 101 states have internal predecessors, (5376), 0 states have call successors, (0), 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 21:45:56,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 87.0) internal successors, (8874), 102 states have internal predecessors, (8874), 0 states have call successors, (0), 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 21:45:56,552 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 87.0) internal successors, (8874), 102 states have internal predecessors, (8874), 0 states have call successors, (0), 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 21:45:56,552 INFO L186 Difference]: Start difference. First operand has 813 places, 1575 transitions, 36645 flow. Second operand 101 states and 5376 transitions. [2022-07-19 21:45:56,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 903 places, 1834 transitions, 46444 flow [2022-07-19 21:45:58,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1834 transitions, 42870 flow, removed 540 selfloop flow, removed 133 redundant places. [2022-07-19 21:45:58,074 INFO L242 Difference]: Finished difference. Result has 788 places, 1713 transitions, 39246 flow [2022-07-19 21:45:58,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=34281, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=882, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=39246, PETRI_PLACES=788, PETRI_TRANSITIONS=1713} [2022-07-19 21:45:58,076 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 711 predicate places. [2022-07-19 21:45:58,076 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 1713 transitions, 39246 flow [2022-07-19 21:45:58,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 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 21:45:58,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:58,076 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] [2022-07-19 21:45:58,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:45:58,281 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,SelfDestructingSolverStorable41 [2022-07-19 21:45:58,281 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:58,281 INFO L85 PathProgramCache]: Analyzing trace with hash -612854579, now seen corresponding path program 11 times [2022-07-19 21:45:58,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:58,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266384751] [2022-07-19 21:45:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:58,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:58,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:58,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266384751] [2022-07-19 21:45:58,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266384751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:58,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87072875] [2022-07-19 21:45:58,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:45:58,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:58,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:58,454 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 21:45:58,456 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 21:45:58,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:45:58,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:45:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:58,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:59,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87072875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:59,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:59,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:45:59,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534613470] [2022-07-19 21:45:59,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:59,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:45:59,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:59,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:45:59,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:45:59,298 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:45:59,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 1713 transitions, 39246 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 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 21:45:59,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:59,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:45:59,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:06,806 INFO L129 PetriNetUnfolder]: 1471/4032 cut-off events. [2022-07-19 21:46:06,806 INFO L130 PetriNetUnfolder]: For 125121/125121 co-relation queries the response was YES. [2022-07-19 21:46:06,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37149 conditions, 4032 events. 1471/4032 cut-off events. For 125121/125121 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 35697 event pairs, 118 based on Foata normal form. 2/3977 useless extension candidates. Maximal degree in co-relation 36963. Up to 835 conditions per place. [2022-07-19 21:46:06,886 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 439 selfloop transitions, 1376 changer transitions 40/1894 dead transitions. [2022-07-19 21:46:06,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 1894 transitions, 46559 flow [2022-07-19 21:46:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-07-19 21:46:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2022-07-19 21:46:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 7892 transitions. [2022-07-19 21:46:06,890 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.608809689115174 [2022-07-19 21:46:06,890 INFO L72 ComplementDD]: Start complementDD. Operand 149 states and 7892 transitions. [2022-07-19 21:46:06,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 7892 transitions. [2022-07-19 21:46:06,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:06,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 149 states and 7892 transitions. [2022-07-19 21:46:06,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 150 states, 149 states have (on average 52.966442953020135) internal successors, (7892), 149 states have internal predecessors, (7892), 0 states have call successors, (0), 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 21:46:06,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 150 states, 150 states have (on average 87.0) internal successors, (13050), 150 states have internal predecessors, (13050), 0 states have call successors, (0), 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 21:46:06,913 INFO L81 ComplementDD]: Finished complementDD. Result has 150 states, 150 states have (on average 87.0) internal successors, (13050), 150 states have internal predecessors, (13050), 0 states have call successors, (0), 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 21:46:06,913 INFO L186 Difference]: Start difference. First operand has 788 places, 1713 transitions, 39246 flow. Second operand 149 states and 7892 transitions. [2022-07-19 21:46:06,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 1894 transitions, 46559 flow [2022-07-19 21:46:08,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 905 places, 1894 transitions, 45317 flow, removed 56 selfloop flow, removed 28 redundant places. [2022-07-19 21:46:08,296 INFO L242 Difference]: Finished difference. Result has 916 places, 1709 transitions, 40902 flow [2022-07-19 21:46:08,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38038, PETRI_DIFFERENCE_MINUEND_PLACES=757, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=149, PETRI_FLOW=40902, PETRI_PLACES=916, PETRI_TRANSITIONS=1709} [2022-07-19 21:46:08,299 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 839 predicate places. [2022-07-19 21:46:08,299 INFO L495 AbstractCegarLoop]: Abstraction has has 916 places, 1709 transitions, 40902 flow [2022-07-19 21:46:08,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 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 21:46:08,299 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:08,299 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] [2022-07-19 21:46:08,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-19 21:46:08,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:08,500 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash -446656927, now seen corresponding path program 12 times [2022-07-19 21:46:08,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:08,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814604688] [2022-07-19 21:46:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:08,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:08,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814604688] [2022-07-19 21:46:08,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814604688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599396029] [2022-07-19 21:46:08,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:46:08,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:08,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:08,656 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 21:46:08,685 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 21:46:08,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:46:08,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:08,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 21:46:08,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:09,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:09,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599396029] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:09,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:09,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-19 21:46:09,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762999959] [2022-07-19 21:46:09,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:09,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:46:09,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:46:09,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:46:09,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:46:09,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 916 places, 1709 transitions, 40902 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 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 21:46:09,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:09,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:46:09,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:12,884 INFO L129 PetriNetUnfolder]: 1530/4318 cut-off events. [2022-07-19 21:46:12,884 INFO L130 PetriNetUnfolder]: For 140902/140902 co-relation queries the response was YES. [2022-07-19 21:46:12,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40138 conditions, 4318 events. 1530/4318 cut-off events. For 140902/140902 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 39572 event pairs, 90 based on Foata normal form. 3/4284 useless extension candidates. Maximal degree in co-relation 39944. Up to 782 conditions per place. [2022-07-19 21:46:12,984 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 436 selfloop transitions, 1282 changer transitions 73/1830 dead transitions. [2022-07-19 21:46:12,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 1830 transitions, 47280 flow [2022-07-19 21:46:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 21:46:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-19 21:46:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2906 transitions. [2022-07-19 21:46:12,986 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6185610898254577 [2022-07-19 21:46:12,986 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2906 transitions. [2022-07-19 21:46:12,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2906 transitions. [2022-07-19 21:46:12,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:12,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2906 transitions. [2022-07-19 21:46:12,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.81481481481482) internal successors, (2906), 54 states have internal predecessors, (2906), 0 states have call successors, (0), 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 21:46:12,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 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 21:46:12,991 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 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 21:46:12,991 INFO L186 Difference]: Start difference. First operand has 916 places, 1709 transitions, 40902 flow. Second operand 54 states and 2906 transitions. [2022-07-19 21:46:12,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 954 places, 1830 transitions, 47280 flow [2022-07-19 21:46:14,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 1830 transitions, 45375 flow, removed 35 selfloop flow, removed 129 redundant places. [2022-07-19 21:46:14,389 INFO L242 Difference]: Finished difference. Result has 832 places, 1694 transitions, 41282 flow [2022-07-19 21:46:14,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=39018, PETRI_DIFFERENCE_MINUEND_PLACES=772, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=41282, PETRI_PLACES=832, PETRI_TRANSITIONS=1694} [2022-07-19 21:46:14,391 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 755 predicate places. [2022-07-19 21:46:14,391 INFO L495 AbstractCegarLoop]: Abstraction has has 832 places, 1694 transitions, 41282 flow [2022-07-19 21:46:14,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 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 21:46:14,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:14,392 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] [2022-07-19 21:46:14,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-19 21:46:14,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:14,592 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:14,593 INFO L85 PathProgramCache]: Analyzing trace with hash 8615431, now seen corresponding path program 13 times [2022-07-19 21:46:14,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:14,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714175774] [2022-07-19 21:46:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:14,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:14,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714175774] [2022-07-19 21:46:14,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714175774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978977125] [2022-07-19 21:46:14,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:46:14,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:14,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:14,751 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 21:46:14,752 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 21:46:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:14,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:46:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:15,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:15,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978977125] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:15,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:15,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:46:15,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980543874] [2022-07-19 21:46:15,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:15,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:46:15,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:46:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:46:15,609 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:46:15,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 1694 transitions, 41282 flow. Second operand has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 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 21:46:15,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:15,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:46:15,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:24,971 INFO L129 PetriNetUnfolder]: 1412/3887 cut-off events. [2022-07-19 21:46:24,971 INFO L130 PetriNetUnfolder]: For 134181/134181 co-relation queries the response was YES. [2022-07-19 21:46:25,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37600 conditions, 3887 events. 1412/3887 cut-off events. For 134181/134181 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 34014 event pairs, 97 based on Foata normal form. 4/3856 useless extension candidates. Maximal degree in co-relation 37409. Up to 692 conditions per place. [2022-07-19 21:46:25,052 INFO L132 encePairwiseOnDemand]: 64/87 looper letters, 428 selfloop transitions, 1367 changer transitions 35/1869 dead transitions. [2022-07-19 21:46:25,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1010 places, 1869 transitions, 48317 flow [2022-07-19 21:46:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-07-19 21:46:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2022-07-19 21:46:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 10038 transitions. [2022-07-19 21:46:25,057 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6072595281306715 [2022-07-19 21:46:25,057 INFO L72 ComplementDD]: Start complementDD. Operand 190 states and 10038 transitions. [2022-07-19 21:46:25,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 190 states and 10038 transitions. [2022-07-19 21:46:25,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:25,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 190 states and 10038 transitions. [2022-07-19 21:46:25,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 191 states, 190 states have (on average 52.83157894736842) internal successors, (10038), 190 states have internal predecessors, (10038), 0 states have call successors, (0), 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 21:46:25,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 191 states, 191 states have (on average 87.0) internal successors, (16617), 191 states have internal predecessors, (16617), 0 states have call successors, (0), 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 21:46:25,077 INFO L81 ComplementDD]: Finished complementDD. Result has 191 states, 191 states have (on average 87.0) internal successors, (16617), 191 states have internal predecessors, (16617), 0 states have call successors, (0), 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 21:46:25,077 INFO L186 Difference]: Start difference. First operand has 832 places, 1694 transitions, 41282 flow. Second operand 190 states and 10038 transitions. [2022-07-19 21:46:25,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1010 places, 1869 transitions, 48317 flow [2022-07-19 21:46:26,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 958 places, 1869 transitions, 45397 flow, removed 80 selfloop flow, removed 52 redundant places. [2022-07-19 21:46:26,265 INFO L242 Difference]: Finished difference. Result has 966 places, 1677 transitions, 40978 flow [2022-07-19 21:46:26,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38489, PETRI_DIFFERENCE_MINUEND_PLACES=769, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=190, PETRI_FLOW=40978, PETRI_PLACES=966, PETRI_TRANSITIONS=1677} [2022-07-19 21:46:26,267 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 889 predicate places. [2022-07-19 21:46:26,267 INFO L495 AbstractCegarLoop]: Abstraction has has 966 places, 1677 transitions, 40978 flow [2022-07-19 21:46:26,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 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 21:46:26,267 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:26,268 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] [2022-07-19 21:46:26,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:26,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-19 21:46:26,468 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash 739671021, now seen corresponding path program 14 times [2022-07-19 21:46:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:26,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558681312] [2022-07-19 21:46:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:26,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:26,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558681312] [2022-07-19 21:46:26,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558681312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682222672] [2022-07-19 21:46:26,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:46:26,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:26,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:26,659 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 21:46:26,660 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 21:46:26,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:46:26,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:46:26,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:26,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:27,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682222672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:27,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:27,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:46:27,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346867206] [2022-07-19 21:46:27,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:27,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:46:27,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:27,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:46:27,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:46:27,417 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:46:27,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 966 places, 1677 transitions, 40978 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 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 21:46:27,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:27,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:46:27,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:30,977 INFO L129 PetriNetUnfolder]: 1404/3801 cut-off events. [2022-07-19 21:46:30,977 INFO L130 PetriNetUnfolder]: For 127173/127173 co-relation queries the response was YES. [2022-07-19 21:46:31,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37115 conditions, 3801 events. 1404/3801 cut-off events. For 127173/127173 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32809 event pairs, 82 based on Foata normal form. 1/3769 useless extension candidates. Maximal degree in co-relation 36928. Up to 722 conditions per place. [2022-07-19 21:46:31,056 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 286 selfloop transitions, 1381 changer transitions 21/1727 dead transitions. [2022-07-19 21:46:31,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 1727 transitions, 45280 flow [2022-07-19 21:46:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-19 21:46:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-19 21:46:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3074 transitions. [2022-07-19 21:46:31,058 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2022-07-19 21:46:31,058 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3074 transitions. [2022-07-19 21:46:31,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3074 transitions. [2022-07-19 21:46:31,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:31,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3074 transitions. [2022-07-19 21:46:31,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.0) internal successors, (3074), 58 states have internal predecessors, (3074), 0 states have call successors, (0), 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 21:46:31,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 0 states have call successors, (0), 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 21:46:31,063 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 0 states have call successors, (0), 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 21:46:31,063 INFO L186 Difference]: Start difference. First operand has 966 places, 1677 transitions, 40978 flow. Second operand 58 states and 3074 transitions. [2022-07-19 21:46:31,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 1727 transitions, 45280 flow [2022-07-19 21:46:32,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 837 places, 1727 transitions, 42946 flow, removed 19 selfloop flow, removed 168 redundant places. [2022-07-19 21:46:32,271 INFO L242 Difference]: Finished difference. Result has 840 places, 1661 transitions, 41061 flow [2022-07-19 21:46:32,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38664, PETRI_DIFFERENCE_MINUEND_PLACES=780, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=41061, PETRI_PLACES=840, PETRI_TRANSITIONS=1661} [2022-07-19 21:46:32,273 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 763 predicate places. [2022-07-19 21:46:32,273 INFO L495 AbstractCegarLoop]: Abstraction has has 840 places, 1661 transitions, 41061 flow [2022-07-19 21:46:32,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 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 21:46:32,273 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:32,273 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] [2022-07-19 21:46:32,290 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 21:46:32,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:32,474 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1010313819, now seen corresponding path program 15 times [2022-07-19 21:46:32,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:32,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812640960] [2022-07-19 21:46:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:32,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:32,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:32,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812640960] [2022-07-19 21:46:32,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812640960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:32,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768090440] [2022-07-19 21:46:32,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:46:32,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:32,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:32,630 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 21:46:32,631 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 21:46:32,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:46:32,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:32,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:46:32,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:32,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:33,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768090440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:33,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:33,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:46:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083048395] [2022-07-19 21:46:33,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:33,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:46:33,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:46:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:46:33,279 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:46:33,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 1661 transitions, 41061 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 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 21:46:33,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:33,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:46:33,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:36,869 INFO L129 PetriNetUnfolder]: 1400/3793 cut-off events. [2022-07-19 21:46:36,869 INFO L130 PetriNetUnfolder]: For 128224/128224 co-relation queries the response was YES. [2022-07-19 21:46:36,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37695 conditions, 3793 events. 1400/3793 cut-off events. For 128224/128224 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32733 event pairs, 78 based on Foata normal form. 1/3764 useless extension candidates. Maximal degree in co-relation 37512. Up to 556 conditions per place. [2022-07-19 21:46:36,952 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 282 selfloop transitions, 1398 changer transitions 9/1728 dead transitions. [2022-07-19 21:46:36,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 893 places, 1728 transitions, 45650 flow [2022-07-19 21:46:36,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 21:46:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-19 21:46:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3177 transitions. [2022-07-19 21:46:36,958 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6086206896551725 [2022-07-19 21:46:36,958 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3177 transitions. [2022-07-19 21:46:36,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3177 transitions. [2022-07-19 21:46:36,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:36,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3177 transitions. [2022-07-19 21:46:36,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.95) internal successors, (3177), 60 states have internal predecessors, (3177), 0 states have call successors, (0), 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 21:46:36,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 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 21:46:36,964 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 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 21:46:36,965 INFO L186 Difference]: Start difference. First operand has 840 places, 1661 transitions, 41061 flow. Second operand 60 states and 3177 transitions. [2022-07-19 21:46:36,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 893 places, 1728 transitions, 45650 flow [2022-07-19 21:46:38,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 1728 transitions, 43367 flow, removed 16 selfloop flow, removed 47 redundant places. [2022-07-19 21:46:38,263 INFO L242 Difference]: Finished difference. Result has 849 places, 1665 transitions, 41736 flow [2022-07-19 21:46:38,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38814, PETRI_DIFFERENCE_MINUEND_PLACES=787, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=41736, PETRI_PLACES=849, PETRI_TRANSITIONS=1665} [2022-07-19 21:46:38,266 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 772 predicate places. [2022-07-19 21:46:38,266 INFO L495 AbstractCegarLoop]: Abstraction has has 849 places, 1665 transitions, 41736 flow [2022-07-19 21:46:38,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 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 21:46:38,266 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:38,267 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] [2022-07-19 21:46:38,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:38,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:38,492 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1051537019, now seen corresponding path program 16 times [2022-07-19 21:46:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:38,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394828656] [2022-07-19 21:46:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:38,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:38,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394828656] [2022-07-19 21:46:38,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394828656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872553892] [2022-07-19 21:46:38,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:46:38,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:38,656 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:46:38,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 21:46:38,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:46:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:46:38,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:39,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:39,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872553892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:39,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:39,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-19 21:46:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880109703] [2022-07-19 21:46:39,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:46:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:46:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:46:39,304 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:46:39,305 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 849 places, 1665 transitions, 41736 flow. Second operand has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 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 21:46:39,305 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:39,305 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:46:39,305 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:44,511 INFO L129 PetriNetUnfolder]: 1541/4021 cut-off events. [2022-07-19 21:46:44,511 INFO L130 PetriNetUnfolder]: For 133576/133576 co-relation queries the response was YES. [2022-07-19 21:46:44,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41150 conditions, 4021 events. 1541/4021 cut-off events. For 133576/133576 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 34362 event pairs, 171 based on Foata normal form. 3/3974 useless extension candidates. Maximal degree in co-relation 40967. Up to 858 conditions per place. [2022-07-19 21:46:44,598 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 781 selfloop transitions, 1171 changer transitions 26/2017 dead transitions. [2022-07-19 21:46:44,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 960 places, 2017 transitions, 53397 flow [2022-07-19 21:46:44,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-19 21:46:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-07-19 21:46:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 6154 transitions. [2022-07-19 21:46:44,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.609789932619897 [2022-07-19 21:46:44,601 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 6154 transitions. [2022-07-19 21:46:44,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 6154 transitions. [2022-07-19 21:46:44,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:44,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 6154 transitions. [2022-07-19 21:46:44,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 53.05172413793103) internal successors, (6154), 116 states have internal predecessors, (6154), 0 states have call successors, (0), 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 21:46:44,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 87.0) internal successors, (10179), 117 states have internal predecessors, (10179), 0 states have call successors, (0), 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 21:46:44,616 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 87.0) internal successors, (10179), 117 states have internal predecessors, (10179), 0 states have call successors, (0), 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 21:46:44,616 INFO L186 Difference]: Start difference. First operand has 849 places, 1665 transitions, 41736 flow. Second operand 116 states and 6154 transitions. [2022-07-19 21:46:44,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 960 places, 2017 transitions, 53397 flow [2022-07-19 21:46:45,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 909 places, 2017 transitions, 50540 flow, removed 5 selfloop flow, removed 51 redundant places. [2022-07-19 21:46:45,988 INFO L242 Difference]: Finished difference. Result has 930 places, 1882 transitions, 46945 flow [2022-07-19 21:46:45,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=39359, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=957, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=46945, PETRI_PLACES=930, PETRI_TRANSITIONS=1882} [2022-07-19 21:46:45,990 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 853 predicate places. [2022-07-19 21:46:45,990 INFO L495 AbstractCegarLoop]: Abstraction has has 930 places, 1882 transitions, 46945 flow [2022-07-19 21:46:45,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 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 21:46:45,990 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:45,991 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] [2022-07-19 21:46:46,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:46,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:46,207 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1509753261, now seen corresponding path program 17 times [2022-07-19 21:46:46,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801140821] [2022-07-19 21:46:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:46,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:46,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:46,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801140821] [2022-07-19 21:46:46,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801140821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:46,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765682135] [2022-07-19 21:46:46,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:46:46,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:46,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:46,377 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:46:46,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 21:46:46,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:46:46,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:46,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 21:46:46,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:46,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:47,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765682135] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:47,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:47,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-19 21:46:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24618644] [2022-07-19 21:46:47,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:47,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:46:47,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:46:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:46:47,046 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:46:47,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 930 places, 1882 transitions, 46945 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 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 21:46:47,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:47,047 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:46:47,047 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:50,171 INFO L129 PetriNetUnfolder]: 1768/4475 cut-off events. [2022-07-19 21:46:50,171 INFO L130 PetriNetUnfolder]: For 153513/153513 co-relation queries the response was YES. [2022-07-19 21:46:50,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47004 conditions, 4475 events. 1768/4475 cut-off events. For 153513/153513 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 38096 event pairs, 104 based on Foata normal form. 1/4437 useless extension candidates. Maximal degree in co-relation 46803. Up to 896 conditions per place. [2022-07-19 21:46:50,275 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 666 selfloop transitions, 1600 changer transitions 9/2314 dead transitions. [2022-07-19 21:46:50,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 2314 transitions, 61976 flow [2022-07-19 21:46:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-19 21:46:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-19 21:46:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2351 transitions. [2022-07-19 21:46:50,277 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.614158829676071 [2022-07-19 21:46:50,277 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2351 transitions. [2022-07-19 21:46:50,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2351 transitions. [2022-07-19 21:46:50,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:50,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2351 transitions. [2022-07-19 21:46:50,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 53.43181818181818) internal successors, (2351), 44 states have internal predecessors, (2351), 0 states have call successors, (0), 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 21:46:50,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 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 21:46:50,281 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 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 21:46:50,282 INFO L186 Difference]: Start difference. First operand has 930 places, 1882 transitions, 46945 flow. Second operand 44 states and 2351 transitions. [2022-07-19 21:46:50,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 2314 transitions, 61976 flow [2022-07-19 21:46:51,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 918 places, 2314 transitions, 60528 flow, removed 103 selfloop flow, removed 44 redundant places. [2022-07-19 21:46:51,978 INFO L242 Difference]: Finished difference. Result has 947 places, 2237 transitions, 60282 flow [2022-07-19 21:46:51,979 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=45792, PETRI_DIFFERENCE_MINUEND_PLACES=875, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=60282, PETRI_PLACES=947, PETRI_TRANSITIONS=2237} [2022-07-19 21:46:51,980 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 870 predicate places. [2022-07-19 21:46:51,980 INFO L495 AbstractCegarLoop]: Abstraction has has 947 places, 2237 transitions, 60282 flow [2022-07-19 21:46:51,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 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 21:46:51,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:51,980 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] [2022-07-19 21:46:51,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:52,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-19 21:46:52,181 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2133095729, now seen corresponding path program 18 times [2022-07-19 21:46:52,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:52,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777551991] [2022-07-19 21:46:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:52,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777551991] [2022-07-19 21:46:52,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777551991] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586725656] [2022-07-19 21:46:52,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:46:52,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:52,328 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:46:52,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 21:46:52,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 21:46:52,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:52,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 21:46:52,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:52,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:52,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586725656] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:52,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:52,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-07-19 21:46:52,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432437918] [2022-07-19 21:46:52,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:52,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 21:46:52,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:52,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 21:46:52,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:46:52,964 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:46:52,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 947 places, 2237 transitions, 60282 flow. Second operand has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 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 21:46:52,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:52,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:46:52,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:58,379 INFO L129 PetriNetUnfolder]: 2184/5326 cut-off events. [2022-07-19 21:46:58,379 INFO L130 PetriNetUnfolder]: For 203232/203232 co-relation queries the response was YES. [2022-07-19 21:46:58,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61291 conditions, 5326 events. 2184/5326 cut-off events. For 203232/203232 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 45426 event pairs, 111 based on Foata normal form. 1/5287 useless extension candidates. Maximal degree in co-relation 61073. Up to 1078 conditions per place. [2022-07-19 21:46:58,519 INFO L132 encePairwiseOnDemand]: 69/87 looper letters, 963 selfloop transitions, 1938 changer transitions 9/2949 dead transitions. [2022-07-19 21:46:58,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 2949 transitions, 85202 flow [2022-07-19 21:46:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 21:46:58,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-19 21:46:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1923 transitions. [2022-07-19 21:46:58,521 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6139846743295019 [2022-07-19 21:46:58,521 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1923 transitions. [2022-07-19 21:46:58,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1923 transitions. [2022-07-19 21:46:58,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:58,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1923 transitions. [2022-07-19 21:46:58,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.416666666666664) internal successors, (1923), 36 states have internal predecessors, (1923), 0 states have call successors, (0), 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 21:46:58,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 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 21:46:58,526 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 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 21:46:58,526 INFO L186 Difference]: Start difference. First operand has 947 places, 2237 transitions, 60282 flow. Second operand 36 states and 1923 transitions. [2022-07-19 21:46:58,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 2949 transitions, 85202 flow [2022-07-19 21:47:01,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 965 places, 2949 transitions, 84921 flow, removed 64 selfloop flow, removed 13 redundant places. [2022-07-19 21:47:01,551 INFO L242 Difference]: Finished difference. Result has 986 places, 2860 transitions, 83626 flow [2022-07-19 21:47:01,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=60051, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=83626, PETRI_PLACES=986, PETRI_TRANSITIONS=2860} [2022-07-19 21:47:01,553 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 909 predicate places. [2022-07-19 21:47:01,553 INFO L495 AbstractCegarLoop]: Abstraction has has 986 places, 2860 transitions, 83626 flow [2022-07-19 21:47:01,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 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 21:47:01,554 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:01,554 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] [2022-07-19 21:47:01,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 21:47:01,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-19 21:47:01,754 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:01,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:01,755 INFO L85 PathProgramCache]: Analyzing trace with hash -796421737, now seen corresponding path program 19 times [2022-07-19 21:47:01,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:01,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601199608] [2022-07-19 21:47:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:01,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:01,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:01,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601199608] [2022-07-19 21:47:01,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601199608] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:01,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563184599] [2022-07-19 21:47:01,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:47:01,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:01,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:01,911 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:01,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 21:47:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:01,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:47:01,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:02,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:02,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563184599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:02,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:02,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:47:02,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226850691] [2022-07-19 21:47:02,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:02,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:47:02,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:02,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:47:02,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:47:02,695 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:47:02,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 986 places, 2860 transitions, 83626 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 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 21:47:02,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:02,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:47:02,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:13,263 INFO L129 PetriNetUnfolder]: 2415/5809 cut-off events. [2022-07-19 21:47:13,263 INFO L130 PetriNetUnfolder]: For 246812/246812 co-relation queries the response was YES. [2022-07-19 21:47:13,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71303 conditions, 5809 events. 2415/5809 cut-off events. For 246812/246812 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 49876 event pairs, 105 based on Foata normal form. 1/5770 useless extension candidates. Maximal degree in co-relation 71068. Up to 1099 conditions per place. [2022-07-19 21:47:13,677 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1064 selfloop transitions, 2268 changer transitions 10/3381 dead transitions. [2022-07-19 21:47:13,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1068 places, 3381 transitions, 104032 flow [2022-07-19 21:47:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-19 21:47:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-19 21:47:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4603 transitions. [2022-07-19 21:47:13,682 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6081384595058792 [2022-07-19 21:47:13,682 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4603 transitions. [2022-07-19 21:47:13,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4603 transitions. [2022-07-19 21:47:13,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:13,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4603 transitions. [2022-07-19 21:47:13,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 52.9080459770115) internal successors, (4603), 87 states have internal predecessors, (4603), 0 states have call successors, (0), 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 21:47:13,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 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 21:47:13,694 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 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 21:47:13,694 INFO L186 Difference]: Start difference. First operand has 986 places, 2860 transitions, 83626 flow. Second operand 87 states and 4603 transitions. [2022-07-19 21:47:13,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1068 places, 3381 transitions, 104032 flow [2022-07-19 21:47:17,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1057 places, 3381 transitions, 103402 flow, removed 103 selfloop flow, removed 11 redundant places. [2022-07-19 21:47:17,443 INFO L242 Difference]: Finished difference. Result has 1083 places, 3267 transitions, 100762 flow [2022-07-19 21:47:17,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=83119, PETRI_DIFFERENCE_MINUEND_PLACES=971, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1889, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=100762, PETRI_PLACES=1083, PETRI_TRANSITIONS=3267} [2022-07-19 21:47:17,445 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1006 predicate places. [2022-07-19 21:47:17,445 INFO L495 AbstractCegarLoop]: Abstraction has has 1083 places, 3267 transitions, 100762 flow [2022-07-19 21:47:17,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 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 21:47:17,446 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:17,446 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] [2022-07-19 21:47:17,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 21:47:17,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:17,654 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:17,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:17,654 INFO L85 PathProgramCache]: Analyzing trace with hash 418442369, now seen corresponding path program 20 times [2022-07-19 21:47:17,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:17,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49365057] [2022-07-19 21:47:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:17,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:17,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:17,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49365057] [2022-07-19 21:47:17,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49365057] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:17,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522410620] [2022-07-19 21:47:17,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:47:17,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:17,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:17,812 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:17,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 21:47:17,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:47:17,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:47:17,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:47:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:18,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:18,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522410620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:18,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:18,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:47:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864556614] [2022-07-19 21:47:18,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:18,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:47:18,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:47:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:47:18,708 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:47:18,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1083 places, 3267 transitions, 100762 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 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 21:47:18,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:18,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:47:18,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:28,354 INFO L129 PetriNetUnfolder]: 2416/5848 cut-off events. [2022-07-19 21:47:28,354 INFO L130 PetriNetUnfolder]: For 276489/276489 co-relation queries the response was YES. [2022-07-19 21:47:28,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74843 conditions, 5848 events. 2416/5848 cut-off events. For 276489/276489 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 50576 event pairs, 123 based on Foata normal form. 1/5809 useless extension candidates. Maximal degree in co-relation 74588. Up to 1123 conditions per place. [2022-07-19 21:47:28,516 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1343 selfloop transitions, 1970 changer transitions 10/3362 dead transitions. [2022-07-19 21:47:28,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1131 places, 3362 transitions, 109573 flow [2022-07-19 21:47:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 21:47:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-19 21:47:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2874 transitions. [2022-07-19 21:47:28,519 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.611749680715198 [2022-07-19 21:47:28,519 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2874 transitions. [2022-07-19 21:47:28,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2874 transitions. [2022-07-19 21:47:28,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:28,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2874 transitions. [2022-07-19 21:47:28,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.22222222222222) internal successors, (2874), 54 states have internal predecessors, (2874), 0 states have call successors, (0), 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 21:47:28,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 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 21:47:28,526 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 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 21:47:28,526 INFO L186 Difference]: Start difference. First operand has 1083 places, 3267 transitions, 100762 flow. Second operand 54 states and 2874 transitions. [2022-07-19 21:47:28,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1131 places, 3362 transitions, 109573 flow [2022-07-19 21:47:32,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1111 places, 3362 transitions, 108811 flow, removed 121 selfloop flow, removed 20 redundant places. [2022-07-19 21:47:32,767 INFO L242 Difference]: Finished difference. Result has 1121 places, 3293 transitions, 105473 flow [2022-07-19 21:47:32,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=100023, PETRI_DIFFERENCE_MINUEND_PLACES=1058, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1945, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=105473, PETRI_PLACES=1121, PETRI_TRANSITIONS=3293} [2022-07-19 21:47:32,770 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1044 predicate places. [2022-07-19 21:47:32,770 INFO L495 AbstractCegarLoop]: Abstraction has has 1121 places, 3293 transitions, 105473 flow [2022-07-19 21:47:32,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 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 21:47:32,770 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:32,770 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] [2022-07-19 21:47:32,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 21:47:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:32,971 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:32,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1588638345, now seen corresponding path program 21 times [2022-07-19 21:47:32,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:32,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042706332] [2022-07-19 21:47:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:32,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:33,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:33,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042706332] [2022-07-19 21:47:33,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042706332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:33,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581346214] [2022-07-19 21:47:33,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:47:33,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:33,128 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:33,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 21:47:33,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:47:33,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:47:33,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:47:33,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:33,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:33,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581346214] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:33,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:33,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-19 21:47:33,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855119450] [2022-07-19 21:47:33,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:33,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:47:33,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:47:33,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:47:33,800 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:47:33,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1121 places, 3293 transitions, 105473 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 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 21:47:33,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:33,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:47:33,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:43,541 INFO L129 PetriNetUnfolder]: 2416/5871 cut-off events. [2022-07-19 21:47:43,542 INFO L130 PetriNetUnfolder]: For 306475/306475 co-relation queries the response was YES. [2022-07-19 21:47:43,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77311 conditions, 5871 events. 2416/5871 cut-off events. For 306475/306475 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 50954 event pairs, 118 based on Foata normal form. 1/5832 useless extension candidates. Maximal degree in co-relation 77054. Up to 1133 conditions per place. [2022-07-19 21:47:43,701 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1351 selfloop transitions, 1965 changer transitions 17/3372 dead transitions. [2022-07-19 21:47:43,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1168 places, 3372 transitions, 113868 flow [2022-07-19 21:47:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-19 21:47:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-19 21:47:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2816 transitions. [2022-07-19 21:47:43,703 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6107135111689438 [2022-07-19 21:47:43,704 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2816 transitions. [2022-07-19 21:47:43,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2816 transitions. [2022-07-19 21:47:43,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:43,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2816 transitions. [2022-07-19 21:47:43,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 53.132075471698116) internal successors, (2816), 53 states have internal predecessors, (2816), 0 states have call successors, (0), 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 21:47:43,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 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 21:47:43,708 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 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 21:47:43,708 INFO L186 Difference]: Start difference. First operand has 1121 places, 3293 transitions, 105473 flow. Second operand 53 states and 2816 transitions. [2022-07-19 21:47:43,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1168 places, 3372 transitions, 113868 flow [2022-07-19 21:47:48,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1142 places, 3372 transitions, 111602 flow, removed 28 selfloop flow, removed 26 redundant places. [2022-07-19 21:47:48,403 INFO L242 Difference]: Finished difference. Result has 1151 places, 3301 transitions, 107867 flow [2022-07-19 21:47:48,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=103216, PETRI_DIFFERENCE_MINUEND_PLACES=1090, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1956, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=107867, PETRI_PLACES=1151, PETRI_TRANSITIONS=3301} [2022-07-19 21:47:48,406 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1074 predicate places. [2022-07-19 21:47:48,407 INFO L495 AbstractCegarLoop]: Abstraction has has 1151 places, 3301 transitions, 107867 flow [2022-07-19 21:47:48,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 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 21:47:48,407 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:48,407 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] [2022-07-19 21:47:48,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 21:47:48,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:48,611 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash -24500895, now seen corresponding path program 22 times [2022-07-19 21:47:48,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:48,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042351085] [2022-07-19 21:47:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:48,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:48,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:48,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042351085] [2022-07-19 21:47:48,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042351085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:48,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566424810] [2022-07-19 21:47:48,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:47:48,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:48,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:48,776 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:47:48,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 21:47:48,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:47:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:47:48,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 21:47:48,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:49,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:49,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566424810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:49,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:49,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-07-19 21:47:49,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973160706] [2022-07-19 21:47:49,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:49,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 21:47:49,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:49,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 21:47:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-07-19 21:47:49,359 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-07-19 21:47:49,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1151 places, 3301 transitions, 107867 flow. Second operand has 30 states, 30 states have (on average 50.833333333333336) internal successors, (1525), 30 states have internal predecessors, (1525), 0 states have call successors, (0), 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 21:47:49,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:49,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-07-19 21:47:49,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:04,115 INFO L129 PetriNetUnfolder]: 4290/9853 cut-off events. [2022-07-19 21:48:04,115 INFO L130 PetriNetUnfolder]: For 583891/583891 co-relation queries the response was YES. [2022-07-19 21:48:04,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136240 conditions, 9853 events. 4290/9853 cut-off events. For 583891/583891 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 89925 event pairs, 122 based on Foata normal form. 68/9879 useless extension candidates. Maximal degree in co-relation 135979. Up to 1764 conditions per place. [2022-07-19 21:48:04,471 INFO L132 encePairwiseOnDemand]: 66/87 looper letters, 1828 selfloop transitions, 4165 changer transitions 35/6067 dead transitions. [2022-07-19 21:48:04,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1238 places, 6067 transitions, 208624 flow [2022-07-19 21:48:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-19 21:48:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-07-19 21:48:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5207 transitions. [2022-07-19 21:48:04,475 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6107201501290171 [2022-07-19 21:48:04,475 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5207 transitions. [2022-07-19 21:48:04,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5207 transitions. [2022-07-19 21:48:04,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:04,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5207 transitions. [2022-07-19 21:48:04,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 53.13265306122449) internal successors, (5207), 98 states have internal predecessors, (5207), 0 states have call successors, (0), 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 21:48:04,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 87.0) internal successors, (8613), 99 states have internal predecessors, (8613), 0 states have call successors, (0), 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 21:48:04,487 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 87.0) internal successors, (8613), 99 states have internal predecessors, (8613), 0 states have call successors, (0), 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 21:48:04,487 INFO L186 Difference]: Start difference. First operand has 1151 places, 3301 transitions, 107867 flow. Second operand 98 states and 5207 transitions. [2022-07-19 21:48:04,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1238 places, 6067 transitions, 208624 flow [2022-07-19 21:48:18,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1201 places, 6067 transitions, 202771 flow, removed 31 selfloop flow, removed 37 redundant places. [2022-07-19 21:48:19,036 INFO L242 Difference]: Finished difference. Result has 1249 places, 5730 transitions, 197598 flow [2022-07-19 21:48:19,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=104628, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2026, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=197598, PETRI_PLACES=1249, PETRI_TRANSITIONS=5730} [2022-07-19 21:48:19,041 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1172 predicate places. [2022-07-19 21:48:19,041 INFO L495 AbstractCegarLoop]: Abstraction has has 1249 places, 5730 transitions, 197598 flow [2022-07-19 21:48:19,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 50.833333333333336) internal successors, (1525), 30 states have internal predecessors, (1525), 0 states have call successors, (0), 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 21:48:19,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:19,041 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] [2022-07-19 21:48:19,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 21:48:19,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-19 21:48:19,267 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:19,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1532947721, now seen corresponding path program 23 times [2022-07-19 21:48:19,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:19,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151616432] [2022-07-19 21:48:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:19,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:19,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:19,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151616432] [2022-07-19 21:48:19,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151616432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137249705] [2022-07-19 21:48:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:48:19,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:19,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:19,432 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:48:19,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 21:48:19,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:48:19,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:48:19,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 21:48:19,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:19,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:48:19,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137249705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:19,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:48:19,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-07-19 21:48:19,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177104675] [2022-07-19 21:48:19,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:19,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 21:48:19,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:19,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 21:48:19,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-07-19 21:48:19,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-07-19 21:48:19,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1249 places, 5730 transitions, 197598 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 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 21:48:19,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:19,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-07-19 21:48:19,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand