./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/test-context1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:16:23,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:16:23,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:16:23,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:16:23,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:16:23,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:16:23,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:16:23,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:16:23,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:16:23,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:16:23,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:16:23,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:16:23,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:16:23,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:16:23,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:16:23,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:16:23,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:16:23,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:16:23,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:16:23,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:16:23,921 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:16:23,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:16:23,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:16:23,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:16:23,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:16:23,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:16:23,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:16:23,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:16:23,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:16:23,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:16:23,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:16:23,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:16:23,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:16:23,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:16:23,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:16:23,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:16:23,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:16:23,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:16:23,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:16:23,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:16:23,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:16:23,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:16:23,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:16:23,951 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:16:23,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:16:23,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:16:23,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:16:23,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:16:23,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:16:23,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:16:23,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:16:23,954 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:16:23,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:16:23,954 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:16:23,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:16:23,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:16:23,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:16:23,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:16:23,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:16:23,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:16:23,955 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:16:23,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:16:23,955 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:16:23,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:16:23,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:16:23,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:16:23,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:16:23,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:16:23,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:16:23,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:16:23,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:16:23,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:16:23,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:16:23,957 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:16:23,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:16:23,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:16:23,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2022-07-21 09:16:24,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:16:24,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:16:24,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:16:24,233 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:16:24,233 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:16:24,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2022-07-21 09:16:24,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d562c208b/6095499e47df47c0be7598e4b106e7cf/FLAGfdbf3c9c4 [2022-07-21 09:16:24,646 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:16:24,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2022-07-21 09:16:24,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d562c208b/6095499e47df47c0be7598e4b106e7cf/FLAGfdbf3c9c4 [2022-07-21 09:16:24,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d562c208b/6095499e47df47c0be7598e4b106e7cf [2022-07-21 09:16:24,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:16:24,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:16:24,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:16:24,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:16:24,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:16:24,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3307120a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24, skipping insertion in model container [2022-07-21 09:16:24,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:16:24,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:16:24,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-07-21 09:16:24,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:16:24,832 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:16:24,845 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-07-21 09:16:24,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:16:24,857 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:16:24,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24 WrapperNode [2022-07-21 09:16:24,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:16:24,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:16:24,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:16:24,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:16:24,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,890 INFO L137 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2022-07-21 09:16:24,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:16:24,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:16:24,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:16:24,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:16:24,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:16:24,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:16:24,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:16:24,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:16:24,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (1/1) ... [2022-07-21 09:16:24,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:16:24,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:24,989 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) [2022-07-21 09:16:25,035 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 [2022-07-21 09:16:25,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:16:25,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:16:25,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:16:25,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:16:25,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:16:25,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:16:25,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:16:25,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:16:25,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:16:25,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:16:25,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:16:25,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:16:25,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:16:25,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:16:25,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:16:25,073 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:16:25,153 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:16:25,155 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:16:25,403 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:16:25,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:16:25,471 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:16:25,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:16:25 BoogieIcfgContainer [2022-07-21 09:16:25,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:16:25,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:16:25,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:16:25,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:16:25,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:16:24" (1/3) ... [2022-07-21 09:16:25,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec0d192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:16:25, skipping insertion in model container [2022-07-21 09:16:25,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:16:24" (2/3) ... [2022-07-21 09:16:25,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec0d192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:16:25, skipping insertion in model container [2022-07-21 09:16:25,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:16:25" (3/3) ... [2022-07-21 09:16:25,478 INFO L111 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-07-21 09:16:25,482 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:16:25,487 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:16:25,488 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:16:25,488 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:16:25,541 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:16:25,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2022-07-21 09:16:25,617 INFO L129 PetriNetUnfolder]: 9/114 cut-off events. [2022-07-21 09:16:25,625 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:16:25,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-07-21 09:16:25,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2022-07-21 09:16:25,632 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2022-07-21 09:16:25,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:16:25,643 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@1402af1b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4465bec6 [2022-07-21 09:16:25,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:16:25,659 INFO L129 PetriNetUnfolder]: 9/104 cut-off events. [2022-07-21 09:16:25,660 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:16:25,660 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:25,660 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:25,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:25,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1304387571, now seen corresponding path program 1 times [2022-07-21 09:16:25,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:25,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358155655] [2022-07-21 09:16:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:25,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:25,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:25,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358155655] [2022-07-21 09:16:25,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358155655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:25,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:25,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:16:25,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49283405] [2022-07-21 09:16:25,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:25,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:16:25,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:25,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:16:25,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:16:25,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2022-07-21 09:16:25,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:25,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2022-07-21 09:16:25,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:25,949 INFO L129 PetriNetUnfolder]: 5/101 cut-off events. [2022-07-21 09:16:25,956 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 09:16:25,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 101 events. 5/101 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 8/103 useless extension candidates. Maximal degree in co-relation 79. Up to 9 conditions per place. [2022-07-21 09:16:25,958 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 6 selfloop transitions, 0 changer transitions 3/99 dead transitions. [2022-07-21 09:16:25,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 222 flow [2022-07-21 09:16:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:16:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:16:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2022-07-21 09:16:25,970 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9396551724137931 [2022-07-21 09:16:25,970 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2022-07-21 09:16:25,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2022-07-21 09:16:25,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:25,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2022-07-21 09:16:25,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,986 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:25,987 INFO L186 Difference]: Start difference. First operand has 103 places, 105 transitions, 222 flow. Second operand 2 states and 218 transitions. [2022-07-21 09:16:25,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 222 flow [2022-07-21 09:16:25,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:16:25,998 INFO L242 Difference]: Finished difference. Result has 100 places, 96 transitions, 196 flow [2022-07-21 09:16:25,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2022-07-21 09:16:26,002 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2022-07-21 09:16:26,003 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 196 flow [2022-07-21 09:16:26,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,004 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:26,004 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:26,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:16:26,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:26,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:26,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1254353798, now seen corresponding path program 1 times [2022-07-21 09:16:26,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:26,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707053220] [2022-07-21 09:16:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:26,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:26,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:26,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707053220] [2022-07-21 09:16:26,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707053220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:26,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:26,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:16:26,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825254542] [2022-07-21 09:16:26,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:26,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:16:26,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:26,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:16:26,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:16:26,233 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-07-21 09:16:26,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:26,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-07-21 09:16:26,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:26,335 INFO L129 PetriNetUnfolder]: 7/116 cut-off events. [2022-07-21 09:16:26,335 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 09:16:26,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 116 events. 7/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 148. Up to 15 conditions per place. [2022-07-21 09:16:26,338 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 21 selfloop transitions, 2 changer transitions 4/103 dead transitions. [2022-07-21 09:16:26,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 266 flow [2022-07-21 09:16:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:16:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:16:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 458 transitions. [2022-07-21 09:16:26,343 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7896551724137931 [2022-07-21 09:16:26,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 458 transitions. [2022-07-21 09:16:26,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 458 transitions. [2022-07-21 09:16:26,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:26,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 458 transitions. [2022-07-21 09:16:26,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,349 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,349 INFO L186 Difference]: Start difference. First operand has 100 places, 96 transitions, 196 flow. Second operand 5 states and 458 transitions. [2022-07-21 09:16:26,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 266 flow [2022-07-21 09:16:26,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:16:26,352 INFO L242 Difference]: Finished difference. Result has 104 places, 97 transitions, 212 flow [2022-07-21 09:16:26,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2022-07-21 09:16:26,354 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 1 predicate places. [2022-07-21 09:16:26,354 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 212 flow [2022-07-21 09:16:26,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,355 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:26,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:26,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:16:26,355 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:26,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2038904616, now seen corresponding path program 1 times [2022-07-21 09:16:26,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:26,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543722792] [2022-07-21 09:16:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:26,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:26,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:26,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543722792] [2022-07-21 09:16:26,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543722792] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:26,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:26,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:16:26,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416367498] [2022-07-21 09:16:26,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:26,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:16:26,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:16:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:16:26,469 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-07-21 09:16:26,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:26,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-07-21 09:16:26,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:26,502 INFO L129 PetriNetUnfolder]: 8/138 cut-off events. [2022-07-21 09:16:26,502 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-07-21 09:16:26,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 138 events. 8/138 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 185 event pairs, 1 based on Foata normal form. 3/133 useless extension candidates. Maximal degree in co-relation 170. Up to 15 conditions per place. [2022-07-21 09:16:26,503 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 8 selfloop transitions, 2 changer transitions 2/101 dead transitions. [2022-07-21 09:16:26,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 247 flow [2022-07-21 09:16:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:16:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:16:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2022-07-21 09:16:26,505 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9137931034482759 [2022-07-21 09:16:26,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2022-07-21 09:16:26,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2022-07-21 09:16:26,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:26,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2022-07-21 09:16:26,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,508 INFO L186 Difference]: Start difference. First operand has 104 places, 97 transitions, 212 flow. Second operand 3 states and 318 transitions. [2022-07-21 09:16:26,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 247 flow [2022-07-21 09:16:26,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-21 09:16:26,513 INFO L242 Difference]: Finished difference. Result has 102 places, 98 transitions, 218 flow [2022-07-21 09:16:26,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2022-07-21 09:16:26,515 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2022-07-21 09:16:26,515 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 218 flow [2022-07-21 09:16:26,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:26,516 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:26,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:16:26,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:26,517 INFO L85 PathProgramCache]: Analyzing trace with hash 983157472, now seen corresponding path program 1 times [2022-07-21 09:16:26,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:26,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273434195] [2022-07-21 09:16:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:26,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:26,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:26,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273434195] [2022-07-21 09:16:26,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273434195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:16:26,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:16:26,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:16:26,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982479388] [2022-07-21 09:16:26,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:16:26,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:16:26,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:26,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:16:26,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:16:26,636 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 116 [2022-07-21 09:16:26,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:26,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 116 [2022-07-21 09:16:26,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:26,722 INFO L129 PetriNetUnfolder]: 8/184 cut-off events. [2022-07-21 09:16:26,722 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-21 09:16:26,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 184 events. 8/184 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 371 event pairs, 0 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 248. Up to 14 conditions per place. [2022-07-21 09:16:26,723 INFO L132 encePairwiseOnDemand]: 105/116 looper letters, 21 selfloop transitions, 10 changer transitions 8/113 dead transitions. [2022-07-21 09:16:26,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 337 flow [2022-07-21 09:16:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:16:26,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:16:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 823 transitions. [2022-07-21 09:16:26,725 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7883141762452107 [2022-07-21 09:16:26,725 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 823 transitions. [2022-07-21 09:16:26,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 823 transitions. [2022-07-21 09:16:26,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:26,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 823 transitions. [2022-07-21 09:16:26,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.44444444444444) internal successors, (823), 9 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,730 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,730 INFO L186 Difference]: Start difference. First operand has 102 places, 98 transitions, 218 flow. Second operand 9 states and 823 transitions. [2022-07-21 09:16:26,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 337 flow [2022-07-21 09:16:26,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:16:26,732 INFO L242 Difference]: Finished difference. Result has 110 places, 99 transitions, 244 flow [2022-07-21 09:16:26,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2022-07-21 09:16:26,733 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-07-21 09:16:26,733 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 244 flow [2022-07-21 09:16:26,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:26,733 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:26,734 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:26,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:16:26,734 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash -579711517, now seen corresponding path program 1 times [2022-07-21 09:16:26,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:26,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237381166] [2022-07-21 09:16:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:26,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:27,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:27,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237381166] [2022-07-21 09:16:27,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237381166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:27,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341205147] [2022-07-21 09:16:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:27,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:27,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:27,120 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) [2022-07-21 09:16:27,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:16:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 09:16:27,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:27,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:16:27,394 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:16:27,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:16:27,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 09:16:27,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:16:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:27,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:27,760 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_66 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_66) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-21 09:16:27,788 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:27,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-21 09:16:27,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-21 09:16:28,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:16:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-07-21 09:16:28,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341205147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:28,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:28,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 30 [2022-07-21 09:16:28,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085845922] [2022-07-21 09:16:28,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:28,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 09:16:28,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 09:16:28,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=698, Unknown=1, NotChecked=54, Total=870 [2022-07-21 09:16:28,142 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 116 [2022-07-21 09:16:28,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 244 flow. Second operand has 30 states, 30 states have (on average 58.7) internal successors, (1761), 30 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:28,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 116 [2022-07-21 09:16:28,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:28,564 INFO L129 PetriNetUnfolder]: 35/284 cut-off events. [2022-07-21 09:16:28,565 INFO L130 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-07-21 09:16:28,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 284 events. 35/284 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 975 event pairs, 2 based on Foata normal form. 1/265 useless extension candidates. Maximal degree in co-relation 485. Up to 47 conditions per place. [2022-07-21 09:16:28,566 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 48 selfloop transitions, 24 changer transitions 9/130 dead transitions. [2022-07-21 09:16:28,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 130 transitions, 507 flow [2022-07-21 09:16:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 09:16:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-21 09:16:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1181 transitions. [2022-07-21 09:16:28,569 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.509051724137931 [2022-07-21 09:16:28,569 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1181 transitions. [2022-07-21 09:16:28,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1181 transitions. [2022-07-21 09:16:28,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:28,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1181 transitions. [2022-07-21 09:16:28,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.05) internal successors, (1181), 20 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,575 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,575 INFO L186 Difference]: Start difference. First operand has 110 places, 99 transitions, 244 flow. Second operand 20 states and 1181 transitions. [2022-07-21 09:16:28,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 130 transitions, 507 flow [2022-07-21 09:16:28,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 130 transitions, 492 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-21 09:16:28,578 INFO L242 Difference]: Finished difference. Result has 128 places, 109 transitions, 361 flow [2022-07-21 09:16:28,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=361, PETRI_PLACES=128, PETRI_TRANSITIONS=109} [2022-07-21 09:16:28,579 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 25 predicate places. [2022-07-21 09:16:28,579 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 109 transitions, 361 flow [2022-07-21 09:16:28,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 58.7) internal successors, (1761), 30 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:28,580 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:28,580 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:28,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:16:28,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:28,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1972578125, now seen corresponding path program 2 times [2022-07-21 09:16:28,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:28,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146809347] [2022-07-21 09:16:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:28,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:28,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:28,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146809347] [2022-07-21 09:16:28,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146809347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:28,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057058024] [2022-07-21 09:16:28,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:16:28,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:28,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:28,963 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) [2022-07-21 09:16:28,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:16:29,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:16:29,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:29,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:16:29,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:29,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:29,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057058024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:29,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:29,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-07-21 09:16:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048727611] [2022-07-21 09:16:29,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:29,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 09:16:29,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:29,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 09:16:29,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:16:29,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-07-21 09:16:29,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 109 transitions, 361 flow. Second operand has 28 states, 28 states have (on average 88.32142857142857) internal successors, (2473), 28 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:29,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:29,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-07-21 09:16:29,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:29,996 INFO L129 PetriNetUnfolder]: 38/411 cut-off events. [2022-07-21 09:16:29,996 INFO L130 PetriNetUnfolder]: For 344/361 co-relation queries the response was YES. [2022-07-21 09:16:29,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 411 events. 38/411 cut-off events. For 344/361 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1908 event pairs, 5 based on Foata normal form. 20/403 useless extension candidates. Maximal degree in co-relation 748. Up to 49 conditions per place. [2022-07-21 09:16:29,999 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 37 selfloop transitions, 23 changer transitions 6/141 dead transitions. [2022-07-21 09:16:30,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 141 transitions, 647 flow [2022-07-21 09:16:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:16:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-21 09:16:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1517 transitions. [2022-07-21 09:16:30,003 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7692697768762677 [2022-07-21 09:16:30,003 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1517 transitions. [2022-07-21 09:16:30,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1517 transitions. [2022-07-21 09:16:30,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:30,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1517 transitions. [2022-07-21 09:16:30,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.23529411764706) internal successors, (1517), 17 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:30,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:30,009 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:30,009 INFO L186 Difference]: Start difference. First operand has 128 places, 109 transitions, 361 flow. Second operand 17 states and 1517 transitions. [2022-07-21 09:16:30,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 141 transitions, 647 flow [2022-07-21 09:16:30,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 141 transitions, 594 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-07-21 09:16:30,013 INFO L242 Difference]: Finished difference. Result has 134 places, 118 transitions, 444 flow [2022-07-21 09:16:30,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=444, PETRI_PLACES=134, PETRI_TRANSITIONS=118} [2022-07-21 09:16:30,014 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 31 predicate places. [2022-07-21 09:16:30,014 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 444 flow [2022-07-21 09:16:30,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 88.32142857142857) internal successors, (2473), 28 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:30,015 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:30,015 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:30,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 09:16:30,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 09:16:30,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1314716553, now seen corresponding path program 3 times [2022-07-21 09:16:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:30,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253789097] [2022-07-21 09:16:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:30,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:16:30,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:30,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253789097] [2022-07-21 09:16:30,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253789097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:30,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737080371] [2022-07-21 09:16:30,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:16:30,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:30,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:30,294 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) [2022-07-21 09:16:30,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:16:30,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:16:30,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:30,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 09:16:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:30,701 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-21 09:16:30,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-07-21 09:16:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:16:30,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:30,832 INFO L356 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2022-07-21 09:16:30,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-07-21 09:16:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:16:31,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737080371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:31,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:31,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 25 [2022-07-21 09:16:31,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283305756] [2022-07-21 09:16:31,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:31,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 09:16:31,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:31,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 09:16:31,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-07-21 09:16:31,296 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 116 [2022-07-21 09:16:31,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 118 transitions, 444 flow. Second operand has 25 states, 25 states have (on average 67.68) internal successors, (1692), 25 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:31,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:31,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 116 [2022-07-21 09:16:31,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:31,719 INFO L129 PetriNetUnfolder]: 58/547 cut-off events. [2022-07-21 09:16:31,720 INFO L130 PetriNetUnfolder]: For 709/725 co-relation queries the response was YES. [2022-07-21 09:16:31,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 547 events. 58/547 cut-off events. For 709/725 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2969 event pairs, 0 based on Foata normal form. 26/534 useless extension candidates. Maximal degree in co-relation 1110. Up to 69 conditions per place. [2022-07-21 09:16:31,722 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 67 selfloop transitions, 24 changer transitions 36/180 dead transitions. [2022-07-21 09:16:31,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 180 transitions, 955 flow [2022-07-21 09:16:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:16:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:16:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1439 transitions. [2022-07-21 09:16:31,726 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5907224958949097 [2022-07-21 09:16:31,726 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1439 transitions. [2022-07-21 09:16:31,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1439 transitions. [2022-07-21 09:16:31,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:31,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1439 transitions. [2022-07-21 09:16:31,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 68.52380952380952) internal successors, (1439), 21 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:31,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:31,733 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:31,733 INFO L186 Difference]: Start difference. First operand has 134 places, 118 transitions, 444 flow. Second operand 21 states and 1439 transitions. [2022-07-21 09:16:31,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 180 transitions, 955 flow [2022-07-21 09:16:31,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 180 transitions, 915 flow, removed 3 selfloop flow, removed 8 redundant places. [2022-07-21 09:16:31,737 INFO L242 Difference]: Finished difference. Result has 150 places, 115 transitions, 450 flow [2022-07-21 09:16:31,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=450, PETRI_PLACES=150, PETRI_TRANSITIONS=115} [2022-07-21 09:16:31,738 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 47 predicate places. [2022-07-21 09:16:31,738 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 115 transitions, 450 flow [2022-07-21 09:16:31,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 67.68) internal successors, (1692), 25 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:31,739 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:31,739 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:31,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 09:16:31,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:31,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1750804096, now seen corresponding path program 4 times [2022-07-21 09:16:31,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:31,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185572375] [2022-07-21 09:16:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:31,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:32,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:32,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185572375] [2022-07-21 09:16:32,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185572375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:32,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362971204] [2022-07-21 09:16:32,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:16:32,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:32,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:32,131 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) [2022-07-21 09:16:32,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:16:32,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:16:32,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 09:16:32,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:32,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:16:32,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 09:16:32,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:16:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:32,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:32,623 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_143 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_143) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2022-07-21 09:16:32,658 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:32,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-21 09:16:32,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-21 09:16:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 3 not checked. [2022-07-21 09:16:32,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362971204] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:32,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:32,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 30 [2022-07-21 09:16:32,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397079210] [2022-07-21 09:16:32,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:32,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 09:16:32,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:32,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 09:16:32,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2022-07-21 09:16:32,957 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2022-07-21 09:16:32,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 115 transitions, 450 flow. Second operand has 30 states, 30 states have (on average 64.06666666666666) internal successors, (1922), 30 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:32,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:32,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2022-07-21 09:16:32,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:33,269 INFO L129 PetriNetUnfolder]: 50/413 cut-off events. [2022-07-21 09:16:33,269 INFO L130 PetriNetUnfolder]: For 677/689 co-relation queries the response was YES. [2022-07-21 09:16:33,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 413 events. 50/413 cut-off events. For 677/689 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1828 event pairs, 2 based on Foata normal form. 10/394 useless extension candidates. Maximal degree in co-relation 950. Up to 78 conditions per place. [2022-07-21 09:16:33,272 INFO L132 encePairwiseOnDemand]: 97/116 looper letters, 47 selfloop transitions, 23 changer transitions 8/136 dead transitions. [2022-07-21 09:16:33,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 136 transitions, 719 flow [2022-07-21 09:16:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 09:16:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 09:16:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1169 transitions. [2022-07-21 09:16:33,274 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5598659003831418 [2022-07-21 09:16:33,274 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1169 transitions. [2022-07-21 09:16:33,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1169 transitions. [2022-07-21 09:16:33,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:33,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1169 transitions. [2022-07-21 09:16:33,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 64.94444444444444) internal successors, (1169), 18 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:33,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 116.0) internal successors, (2204), 19 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:33,280 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 116.0) internal successors, (2204), 19 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:33,280 INFO L186 Difference]: Start difference. First operand has 150 places, 115 transitions, 450 flow. Second operand 18 states and 1169 transitions. [2022-07-21 09:16:33,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 136 transitions, 719 flow [2022-07-21 09:16:33,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 136 transitions, 640 flow, removed 17 selfloop flow, removed 20 redundant places. [2022-07-21 09:16:33,283 INFO L242 Difference]: Finished difference. Result has 143 places, 119 transitions, 482 flow [2022-07-21 09:16:33,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=482, PETRI_PLACES=143, PETRI_TRANSITIONS=119} [2022-07-21 09:16:33,284 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 40 predicate places. [2022-07-21 09:16:33,284 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 119 transitions, 482 flow [2022-07-21 09:16:33,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 64.06666666666666) internal successors, (1922), 30 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:33,285 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:33,285 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:33,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 09:16:33,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:33,499 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1172145542, now seen corresponding path program 5 times [2022-07-21 09:16:33,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:33,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312442601] [2022-07-21 09:16:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:33,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:33,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:33,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312442601] [2022-07-21 09:16:33,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312442601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:33,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750258838] [2022-07-21 09:16:33,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:16:33,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:33,675 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) [2022-07-21 09:16:33,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:16:33,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:16:33,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:33,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 09:16:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:33,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:16:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:33,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:33,974 INFO L356 Elim1Store]: treesize reduction 14, result has 26.3 percent of original size [2022-07-21 09:16:33,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2022-07-21 09:16:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:34,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750258838] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:34,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:34,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7] total 15 [2022-07-21 09:16:34,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899940588] [2022-07-21 09:16:34,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:34,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 09:16:34,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:34,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 09:16:34,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:16:34,030 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2022-07-21 09:16:34,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 119 transitions, 482 flow. Second operand has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:34,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:34,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2022-07-21 09:16:34,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:34,255 INFO L129 PetriNetUnfolder]: 82/601 cut-off events. [2022-07-21 09:16:34,255 INFO L130 PetriNetUnfolder]: For 987/1002 co-relation queries the response was YES. [2022-07-21 09:16:34,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1426 conditions, 601 events. 82/601 cut-off events. For 987/1002 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3529 event pairs, 2 based on Foata normal form. 6/563 useless extension candidates. Maximal degree in co-relation 1407. Up to 107 conditions per place. [2022-07-21 09:16:34,260 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 64 selfloop transitions, 22 changer transitions 9/156 dead transitions. [2022-07-21 09:16:34,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 156 transitions, 924 flow [2022-07-21 09:16:34,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:16:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-21 09:16:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1192 transitions. [2022-07-21 09:16:34,264 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6044624746450304 [2022-07-21 09:16:34,264 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1192 transitions. [2022-07-21 09:16:34,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1192 transitions. [2022-07-21 09:16:34,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:34,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1192 transitions. [2022-07-21 09:16:34,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 70.11764705882354) internal successors, (1192), 17 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:34,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:34,273 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:34,273 INFO L186 Difference]: Start difference. First operand has 143 places, 119 transitions, 482 flow. Second operand 17 states and 1192 transitions. [2022-07-21 09:16:34,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 156 transitions, 924 flow [2022-07-21 09:16:34,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 156 transitions, 853 flow, removed 13 selfloop flow, removed 16 redundant places. [2022-07-21 09:16:34,278 INFO L242 Difference]: Finished difference. Result has 145 places, 126 transitions, 563 flow [2022-07-21 09:16:34,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=563, PETRI_PLACES=145, PETRI_TRANSITIONS=126} [2022-07-21 09:16:34,279 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 42 predicate places. [2022-07-21 09:16:34,279 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 126 transitions, 563 flow [2022-07-21 09:16:34,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:34,280 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:34,280 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:34,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:34,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:34,492 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:34,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:34,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2103614100, now seen corresponding path program 6 times [2022-07-21 09:16:34,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:34,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759086027] [2022-07-21 09:16:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:34,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:34,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:34,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759086027] [2022-07-21 09:16:34,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759086027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:34,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281732864] [2022-07-21 09:16:34,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:16:34,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:34,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:34,680 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) [2022-07-21 09:16:34,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:16:34,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:16:34,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 09:16:34,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:35,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:16:35,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 09:16:35,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:16:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:35,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:35,319 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_200 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-21 09:16:35,333 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:35,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-21 09:16:35,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-21 09:16:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:35,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281732864] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:35,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:35,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 32 [2022-07-21 09:16:35,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100251111] [2022-07-21 09:16:35,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:35,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:16:35,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:35,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:16:35,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=800, Unknown=1, NotChecked=58, Total=992 [2022-07-21 09:16:35,590 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 116 [2022-07-21 09:16:35,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 126 transitions, 563 flow. Second operand has 32 states, 32 states have (on average 57.53125) internal successors, (1841), 32 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:35,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:35,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 116 [2022-07-21 09:16:35,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:36,052 INFO L129 PetriNetUnfolder]: 121/791 cut-off events. [2022-07-21 09:16:36,052 INFO L130 PetriNetUnfolder]: For 1740/1761 co-relation queries the response was YES. [2022-07-21 09:16:36,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2029 conditions, 791 events. 121/791 cut-off events. For 1740/1761 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5371 event pairs, 6 based on Foata normal form. 13/749 useless extension candidates. Maximal degree in co-relation 2008. Up to 179 conditions per place. [2022-07-21 09:16:36,057 INFO L132 encePairwiseOnDemand]: 97/116 looper letters, 74 selfloop transitions, 39 changer transitions 8/173 dead transitions. [2022-07-21 09:16:36,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 173 transitions, 1192 flow [2022-07-21 09:16:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:16:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:16:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1218 transitions. [2022-07-21 09:16:36,059 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-07-21 09:16:36,059 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1218 transitions. [2022-07-21 09:16:36,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1218 transitions. [2022-07-21 09:16:36,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:36,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1218 transitions. [2022-07-21 09:16:36,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 58.0) internal successors, (1218), 21 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:36,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:36,067 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:36,067 INFO L186 Difference]: Start difference. First operand has 145 places, 126 transitions, 563 flow. Second operand 21 states and 1218 transitions. [2022-07-21 09:16:36,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 173 transitions, 1192 flow [2022-07-21 09:16:36,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 173 transitions, 1148 flow, removed 5 selfloop flow, removed 13 redundant places. [2022-07-21 09:16:36,073 INFO L242 Difference]: Finished difference. Result has 157 places, 147 transitions, 904 flow [2022-07-21 09:16:36,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=904, PETRI_PLACES=157, PETRI_TRANSITIONS=147} [2022-07-21 09:16:36,075 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 54 predicate places. [2022-07-21 09:16:36,076 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 147 transitions, 904 flow [2022-07-21 09:16:36,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 57.53125) internal successors, (1841), 32 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:36,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:36,077 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:36,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:36,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:36,295 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash -577211528, now seen corresponding path program 7 times [2022-07-21 09:16:36,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:36,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836190175] [2022-07-21 09:16:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:36,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:36,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836190175] [2022-07-21 09:16:36,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836190175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370970848] [2022-07-21 09:16:36,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:16:36,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:36,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:36,500 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) [2022-07-21 09:16:36,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:16:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:36,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 09:16:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:36,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:16:36,695 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:16:36,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:16:36,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 09:16:36,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:16:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:36,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:36,916 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_230 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_230) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-21 09:16:36,942 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:36,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-21 09:16:36,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-21 09:16:37,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:16:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 4 not checked. [2022-07-21 09:16:37,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370970848] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:37,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:37,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 25 [2022-07-21 09:16:37,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40603557] [2022-07-21 09:16:37,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:37,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 09:16:37,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:37,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 09:16:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=469, Unknown=1, NotChecked=44, Total=600 [2022-07-21 09:16:37,246 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 116 [2022-07-21 09:16:37,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 147 transitions, 904 flow. Second operand has 25 states, 25 states have (on average 60.76) internal successors, (1519), 25 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:37,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:37,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 116 [2022-07-21 09:16:37,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:37,615 INFO L129 PetriNetUnfolder]: 126/816 cut-off events. [2022-07-21 09:16:37,615 INFO L130 PetriNetUnfolder]: For 2588/2614 co-relation queries the response was YES. [2022-07-21 09:16:37,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 816 events. 126/816 cut-off events. For 2588/2614 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5634 event pairs, 6 based on Foata normal form. 13/772 useless extension candidates. Maximal degree in co-relation 2262. Up to 178 conditions per place. [2022-07-21 09:16:37,620 INFO L132 encePairwiseOnDemand]: 97/116 looper letters, 73 selfloop transitions, 38 changer transitions 8/174 dead transitions. [2022-07-21 09:16:37,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 174 transitions, 1349 flow [2022-07-21 09:16:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 09:16:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 09:16:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1100 transitions. [2022-07-21 09:16:37,624 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5268199233716475 [2022-07-21 09:16:37,624 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1100 transitions. [2022-07-21 09:16:37,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1100 transitions. [2022-07-21 09:16:37,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:37,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1100 transitions. [2022-07-21 09:16:37,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.111111111111114) internal successors, (1100), 18 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:37,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 116.0) internal successors, (2204), 19 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:37,638 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 116.0) internal successors, (2204), 19 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:37,639 INFO L186 Difference]: Start difference. First operand has 157 places, 147 transitions, 904 flow. Second operand 18 states and 1100 transitions. [2022-07-21 09:16:37,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 174 transitions, 1349 flow [2022-07-21 09:16:37,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 174 transitions, 1299 flow, removed 11 selfloop flow, removed 14 redundant places. [2022-07-21 09:16:37,645 INFO L242 Difference]: Finished difference. Result has 162 places, 151 transitions, 1028 flow [2022-07-21 09:16:37,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1028, PETRI_PLACES=162, PETRI_TRANSITIONS=151} [2022-07-21 09:16:37,646 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 59 predicate places. [2022-07-21 09:16:37,646 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 151 transitions, 1028 flow [2022-07-21 09:16:37,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 60.76) internal successors, (1519), 25 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:37,647 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:37,647 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:37,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:37,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:37,863 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:37,865 INFO L85 PathProgramCache]: Analyzing trace with hash -355345664, now seen corresponding path program 8 times [2022-07-21 09:16:37,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:37,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091271157] [2022-07-21 09:16:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:37,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:38,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091271157] [2022-07-21 09:16:38,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091271157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135753650] [2022-07-21 09:16:38,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:16:38,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:38,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:38,064 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) [2022-07-21 09:16:38,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:16:38,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:16:38,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:38,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 09:16:38,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:38,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:38,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135753650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:38,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:38,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-07-21 09:16:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075098897] [2022-07-21 09:16:38,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:38,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 09:16:38,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:38,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 09:16:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1229, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 09:16:38,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-07-21 09:16:38,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 151 transitions, 1028 flow. Second operand has 40 states, 40 states have (on average 88.125) internal successors, (3525), 40 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:38,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:38,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-07-21 09:16:38,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:39,643 INFO L129 PetriNetUnfolder]: 142/1302 cut-off events. [2022-07-21 09:16:39,644 INFO L130 PetriNetUnfolder]: For 4666/4719 co-relation queries the response was YES. [2022-07-21 09:16:39,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3372 conditions, 1302 events. 142/1302 cut-off events. For 4666/4719 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 11090 event pairs, 7 based on Foata normal form. 46/1247 useless extension candidates. Maximal degree in co-relation 3343. Up to 178 conditions per place. [2022-07-21 09:16:39,652 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 65 selfloop transitions, 62 changer transitions 12/219 dead transitions. [2022-07-21 09:16:39,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 219 transitions, 1991 flow [2022-07-21 09:16:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 09:16:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 09:16:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2140 transitions. [2022-07-21 09:16:39,654 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7686781609195402 [2022-07-21 09:16:39,654 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2140 transitions. [2022-07-21 09:16:39,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2140 transitions. [2022-07-21 09:16:39,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:39,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2140 transitions. [2022-07-21 09:16:39,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 89.16666666666667) internal successors, (2140), 24 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:39,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 116.0) internal successors, (2900), 25 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:39,659 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 116.0) internal successors, (2900), 25 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:39,660 INFO L186 Difference]: Start difference. First operand has 162 places, 151 transitions, 1028 flow. Second operand 24 states and 2140 transitions. [2022-07-21 09:16:39,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 219 transitions, 1991 flow [2022-07-21 09:16:39,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 219 transitions, 1926 flow, removed 3 selfloop flow, removed 15 redundant places. [2022-07-21 09:16:39,692 INFO L242 Difference]: Finished difference. Result has 178 places, 187 transitions, 1728 flow [2022-07-21 09:16:39,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1728, PETRI_PLACES=178, PETRI_TRANSITIONS=187} [2022-07-21 09:16:39,693 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 75 predicate places. [2022-07-21 09:16:39,693 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 187 transitions, 1728 flow [2022-07-21 09:16:39,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.125) internal successors, (3525), 40 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:39,694 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:39,694 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:39,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 09:16:39,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 09:16:39,909 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1219465690, now seen corresponding path program 9 times [2022-07-21 09:16:39,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:39,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482623943] [2022-07-21 09:16:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:39,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:40,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:40,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482623943] [2022-07-21 09:16:40,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482623943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:40,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608192352] [2022-07-21 09:16:40,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:16:40,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:40,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:40,077 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) [2022-07-21 09:16:40,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:16:40,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:16:40,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:40,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 09:16:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:40,641 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-21 09:16:40,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-21 09:16:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:40,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:40,768 INFO L356 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2022-07-21 09:16:40,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-07-21 09:16:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:41,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608192352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:41,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:41,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 41 [2022-07-21 09:16:41,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956361857] [2022-07-21 09:16:41,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:41,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 09:16:41,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:41,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 09:16:41,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 09:16:41,704 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 116 [2022-07-21 09:16:41,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 187 transitions, 1728 flow. Second operand has 41 states, 41 states have (on average 59.5609756097561) internal successors, (2442), 41 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:41,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:41,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 116 [2022-07-21 09:16:41,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:45,041 INFO L129 PetriNetUnfolder]: 238/1962 cut-off events. [2022-07-21 09:16:45,041 INFO L130 PetriNetUnfolder]: For 10171/10228 co-relation queries the response was YES. [2022-07-21 09:16:45,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5778 conditions, 1962 events. 238/1962 cut-off events. For 10171/10228 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18816 event pairs, 4 based on Foata normal form. 28/1835 useless extension candidates. Maximal degree in co-relation 5741. Up to 238 conditions per place. [2022-07-21 09:16:45,052 INFO L132 encePairwiseOnDemand]: 86/116 looper letters, 182 selfloop transitions, 129 changer transitions 61/418 dead transitions. [2022-07-21 09:16:45,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 418 transitions, 4399 flow [2022-07-21 09:16:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-21 09:16:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-07-21 09:16:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4426 transitions. [2022-07-21 09:16:45,062 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5156104380242311 [2022-07-21 09:16:45,062 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4426 transitions. [2022-07-21 09:16:45,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4426 transitions. [2022-07-21 09:16:45,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:45,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4426 transitions. [2022-07-21 09:16:45,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 59.810810810810814) internal successors, (4426), 74 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:45,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 116.0) internal successors, (8700), 75 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:45,078 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 116.0) internal successors, (8700), 75 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:45,079 INFO L186 Difference]: Start difference. First operand has 178 places, 187 transitions, 1728 flow. Second operand 74 states and 4426 transitions. [2022-07-21 09:16:45,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 418 transitions, 4399 flow [2022-07-21 09:16:45,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 418 transitions, 4280 flow, removed 50 selfloop flow, removed 9 redundant places. [2022-07-21 09:16:45,102 INFO L242 Difference]: Finished difference. Result has 267 places, 244 transitions, 2776 flow [2022-07-21 09:16:45,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=2776, PETRI_PLACES=267, PETRI_TRANSITIONS=244} [2022-07-21 09:16:45,103 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 164 predicate places. [2022-07-21 09:16:45,103 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 244 transitions, 2776 flow [2022-07-21 09:16:45,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 59.5609756097561) internal successors, (2442), 41 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:45,104 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:45,104 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:45,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:45,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:16:45,323 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:45,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1148546546, now seen corresponding path program 10 times [2022-07-21 09:16:45,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:45,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615235266] [2022-07-21 09:16:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:45,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:45,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:45,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615235266] [2022-07-21 09:16:45,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615235266] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:45,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686682081] [2022-07-21 09:16:45,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:16:45,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:45,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:45,556 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) [2022-07-21 09:16:45,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:16:45,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:16:45,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:45,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 09:16:45,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:45,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 09:16:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:16:45,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:45,953 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 09:16:45,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-07-21 09:16:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:46,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686682081] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:46,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:46,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 24 [2022-07-21 09:16:46,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922905271] [2022-07-21 09:16:46,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:46,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:16:46,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:46,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:16:46,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:16:46,077 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-07-21 09:16:46,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 244 transitions, 2776 flow. Second operand has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:46,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:46,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-07-21 09:16:46,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:46,926 INFO L129 PetriNetUnfolder]: 243/1963 cut-off events. [2022-07-21 09:16:46,926 INFO L130 PetriNetUnfolder]: For 16872/16952 co-relation queries the response was YES. [2022-07-21 09:16:46,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 1963 events. 243/1963 cut-off events. For 16872/16952 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18538 event pairs, 2 based on Foata normal form. 32/1840 useless extension candidates. Maximal degree in co-relation 7296. Up to 262 conditions per place. [2022-07-21 09:16:46,939 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 133 selfloop transitions, 110 changer transitions 63/356 dead transitions. [2022-07-21 09:16:46,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 356 transitions, 4907 flow [2022-07-21 09:16:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 09:16:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-21 09:16:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2572 transitions. [2022-07-21 09:16:46,942 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5543103448275862 [2022-07-21 09:16:46,942 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2572 transitions. [2022-07-21 09:16:46,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2572 transitions. [2022-07-21 09:16:46,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:46,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2572 transitions. [2022-07-21 09:16:46,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 64.3) internal successors, (2572), 40 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:46,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 116.0) internal successors, (4756), 41 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:46,950 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 116.0) internal successors, (4756), 41 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:46,950 INFO L186 Difference]: Start difference. First operand has 267 places, 244 transitions, 2776 flow. Second operand 40 states and 2572 transitions. [2022-07-21 09:16:46,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 356 transitions, 4907 flow [2022-07-21 09:16:46,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 356 transitions, 4537 flow, removed 130 selfloop flow, removed 36 redundant places. [2022-07-21 09:16:46,989 INFO L242 Difference]: Finished difference. Result has 275 places, 236 transitions, 2682 flow [2022-07-21 09:16:46,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2682, PETRI_PLACES=275, PETRI_TRANSITIONS=236} [2022-07-21 09:16:46,990 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 172 predicate places. [2022-07-21 09:16:46,990 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 236 transitions, 2682 flow [2022-07-21 09:16:46,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:46,990 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:46,990 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:47,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:47,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:16:47,208 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1783822456, now seen corresponding path program 11 times [2022-07-21 09:16:47,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:47,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774986146] [2022-07-21 09:16:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:47,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:47,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:47,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774986146] [2022-07-21 09:16:47,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774986146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:47,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306798039] [2022-07-21 09:16:47,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:16:47,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:47,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:47,461 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) [2022-07-21 09:16:47,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:16:47,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:16:47,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:47,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 09:16:47,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:47,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:16:48,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:16:48,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:16:48,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-21 09:16:48,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 09:16:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:48,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:48,256 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-07-21 09:16:48,371 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int)) (v_ArrVal_345 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_345)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select (select .cse0 c_~queue~0.base) (+ (* c_~size~0 4) c_~queue~0.offset .cse1 4)))) (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) c_~queue~0.base) (+ c_~queue~0.offset .cse1 4)))))) is different from false [2022-07-21 09:16:48,394 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int)) (v_ArrVal_345 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_345)) (.cse1 (* c_~front~0 4))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ .cse1 |c_ULTIMATE.start_main_#t~ret9#1.offset| 4))) (not (= (select (select .cse0 |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_main_#t~ret9#1.offset| 4)) 5))))) is different from false [2022-07-21 09:16:48,405 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int)) (v_ArrVal_345 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_345)) (.cse1 (* c_~front~0 4))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4))) (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 5))))) is different from false [2022-07-21 09:16:48,412 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_346 (Array Int Int)) (v_ArrVal_345 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_345)) (.cse1 (* c_~front~0 4))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (not (= 5 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~size~0 4) .cse1 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) is different from false [2022-07-21 09:16:48,440 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:48,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2022-07-21 09:16:48,446 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:48,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 112 [2022-07-21 09:16:48,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-07-21 09:16:48,456 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:48,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 60 [2022-07-21 09:16:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2022-07-21 09:16:48,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306798039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:48,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:48,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 18] total 44 [2022-07-21 09:16:48,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483809153] [2022-07-21 09:16:48,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 09:16:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:48,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 09:16:48,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1321, Unknown=5, NotChecked=390, Total=1892 [2022-07-21 09:16:48,679 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 116 [2022-07-21 09:16:48,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 236 transitions, 2682 flow. Second operand has 44 states, 44 states have (on average 56.06818181818182) internal successors, (2467), 44 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:48,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:48,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 116 [2022-07-21 09:16:48,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:50,193 INFO L129 PetriNetUnfolder]: 261/2021 cut-off events. [2022-07-21 09:16:50,193 INFO L130 PetriNetUnfolder]: For 18029/18086 co-relation queries the response was YES. [2022-07-21 09:16:50,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7494 conditions, 2021 events. 261/2021 cut-off events. For 18029/18086 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 18897 event pairs, 0 based on Foata normal form. 21/1870 useless extension candidates. Maximal degree in co-relation 7425. Up to 274 conditions per place. [2022-07-21 09:16:50,208 INFO L132 encePairwiseOnDemand]: 95/116 looper letters, 105 selfloop transitions, 118 changer transitions 19/289 dead transitions. [2022-07-21 09:16:50,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 289 transitions, 3926 flow [2022-07-21 09:16:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 09:16:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-21 09:16:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1594 transitions. [2022-07-21 09:16:50,210 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4907635467980296 [2022-07-21 09:16:50,210 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1594 transitions. [2022-07-21 09:16:50,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1594 transitions. [2022-07-21 09:16:50,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:50,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1594 transitions. [2022-07-21 09:16:50,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 56.92857142857143) internal successors, (1594), 28 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:50,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 116.0) internal successors, (3364), 29 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:50,215 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 116.0) internal successors, (3364), 29 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:50,215 INFO L186 Difference]: Start difference. First operand has 275 places, 236 transitions, 2682 flow. Second operand 28 states and 1594 transitions. [2022-07-21 09:16:50,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 289 transitions, 3926 flow [2022-07-21 09:16:50,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 289 transitions, 3464 flow, removed 123 selfloop flow, removed 37 redundant places. [2022-07-21 09:16:50,256 INFO L242 Difference]: Finished difference. Result has 255 places, 244 transitions, 2845 flow [2022-07-21 09:16:50,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2845, PETRI_PLACES=255, PETRI_TRANSITIONS=244} [2022-07-21 09:16:50,257 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 152 predicate places. [2022-07-21 09:16:50,257 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 244 transitions, 2845 flow [2022-07-21 09:16:50,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 56.06818181818182) internal successors, (2467), 44 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:50,257 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:50,257 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:50,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:50,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:16:50,474 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash 572037068, now seen corresponding path program 12 times [2022-07-21 09:16:50,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:50,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014732090] [2022-07-21 09:16:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:50,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:50,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:50,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014732090] [2022-07-21 09:16:50,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014732090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:50,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475700715] [2022-07-21 09:16:50,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:16:50,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:50,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:50,536 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) [2022-07-21 09:16:50,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:16:50,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 09:16:50,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:50,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:16:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:16:50,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:16:51,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475700715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:51,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:51,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 14] total 23 [2022-07-21 09:16:51,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804693182] [2022-07-21 09:16:51,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:51,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 09:16:51,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 09:16:51,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:16:51,185 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-07-21 09:16:51,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 244 transitions, 2845 flow. Second operand has 23 states, 23 states have (on average 89.21739130434783) internal successors, (2052), 23 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:51,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:51,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-07-21 09:16:51,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:51,795 INFO L129 PetriNetUnfolder]: 341/2651 cut-off events. [2022-07-21 09:16:51,795 INFO L130 PetriNetUnfolder]: For 25221/25311 co-relation queries the response was YES. [2022-07-21 09:16:51,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10003 conditions, 2651 events. 341/2651 cut-off events. For 25221/25311 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 26735 event pairs, 49 based on Foata normal form. 61/2505 useless extension candidates. Maximal degree in co-relation 9941. Up to 427 conditions per place. [2022-07-21 09:16:51,815 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 81 selfloop transitions, 90 changer transitions 66/318 dead transitions. [2022-07-21 09:16:51,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 318 transitions, 4562 flow [2022-07-21 09:16:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:16:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:16:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1874 transitions. [2022-07-21 09:16:51,817 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7692939244663383 [2022-07-21 09:16:51,817 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1874 transitions. [2022-07-21 09:16:51,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1874 transitions. [2022-07-21 09:16:51,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:51,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1874 transitions. [2022-07-21 09:16:51,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.23809523809524) internal successors, (1874), 21 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:51,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:51,822 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:51,822 INFO L186 Difference]: Start difference. First operand has 255 places, 244 transitions, 2845 flow. Second operand 21 states and 1874 transitions. [2022-07-21 09:16:51,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 318 transitions, 4562 flow [2022-07-21 09:16:51,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 318 transitions, 4315 flow, removed 73 selfloop flow, removed 24 redundant places. [2022-07-21 09:16:51,867 INFO L242 Difference]: Finished difference. Result has 249 places, 238 transitions, 3194 flow [2022-07-21 09:16:51,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3194, PETRI_PLACES=249, PETRI_TRANSITIONS=238} [2022-07-21 09:16:51,868 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 146 predicate places. [2022-07-21 09:16:51,868 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 238 transitions, 3194 flow [2022-07-21 09:16:51,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 89.21739130434783) internal successors, (2052), 23 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:51,869 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:51,869 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:51,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-21 09:16:52,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:16:52,102 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash -271930735, now seen corresponding path program 13 times [2022-07-21 09:16:52,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:52,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761986879] [2022-07-21 09:16:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:52,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:52,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761986879] [2022-07-21 09:16:52,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761986879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130884492] [2022-07-21 09:16:52,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:16:52,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:52,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:52,419 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) [2022-07-21 09:16:52,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:16:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 09:16:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:52,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 09:16:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:16:52,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:52,788 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 09:16:52,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-07-21 09:16:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:16:52,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130884492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:52,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:52,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 11] total 33 [2022-07-21 09:16:52,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44721227] [2022-07-21 09:16:52,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:52,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 09:16:52,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 09:16:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 09:16:52,867 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-07-21 09:16:52,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 238 transitions, 3194 flow. Second operand has 33 states, 33 states have (on average 63.81818181818182) internal successors, (2106), 33 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:52,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:52,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-07-21 09:16:52,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:54,512 INFO L129 PetriNetUnfolder]: 608/3656 cut-off events. [2022-07-21 09:16:54,513 INFO L130 PetriNetUnfolder]: For 42310/42364 co-relation queries the response was YES. [2022-07-21 09:16:54,529 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15802 conditions, 3656 events. 608/3656 cut-off events. For 42310/42364 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 39134 event pairs, 4 based on Foata normal form. 40/3401 useless extension candidates. Maximal degree in co-relation 15741. Up to 775 conditions per place. [2022-07-21 09:16:54,542 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 177 selfloop transitions, 196 changer transitions 107/530 dead transitions. [2022-07-21 09:16:54,542 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 530 transitions, 8316 flow [2022-07-21 09:16:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-21 09:16:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-07-21 09:16:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5142 transitions. [2022-07-21 09:16:54,546 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5540948275862069 [2022-07-21 09:16:54,546 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5142 transitions. [2022-07-21 09:16:54,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5142 transitions. [2022-07-21 09:16:54,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:54,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5142 transitions. [2022-07-21 09:16:54,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 64.275) internal successors, (5142), 80 states have internal predecessors, (5142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:54,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:54,559 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:54,559 INFO L186 Difference]: Start difference. First operand has 249 places, 238 transitions, 3194 flow. Second operand 80 states and 5142 transitions. [2022-07-21 09:16:54,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 530 transitions, 8316 flow [2022-07-21 09:16:54,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 530 transitions, 6836 flow, removed 691 selfloop flow, removed 30 redundant places. [2022-07-21 09:16:54,676 INFO L242 Difference]: Finished difference. Result has 311 places, 304 transitions, 4730 flow [2022-07-21 09:16:54,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=2826, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=4730, PETRI_PLACES=311, PETRI_TRANSITIONS=304} [2022-07-21 09:16:54,677 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 208 predicate places. [2022-07-21 09:16:54,677 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 304 transitions, 4730 flow [2022-07-21 09:16:54,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 63.81818181818182) internal successors, (2106), 33 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:54,677 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:54,678 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:54,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:54,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:16:54,894 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:54,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1191970251, now seen corresponding path program 14 times [2022-07-21 09:16:54,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:54,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792472849] [2022-07-21 09:16:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:54,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:55,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792472849] [2022-07-21 09:16:55,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792472849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146805107] [2022-07-21 09:16:55,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:16:55,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:55,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:55,283 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) [2022-07-21 09:16:55,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:16:55,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:16:55,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:55,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 09:16:55,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:16:55,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-21 09:16:55,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 09:16:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:16:55,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:55,957 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_439 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_439) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2022-07-21 09:16:55,967 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:55,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-07-21 09:16:55,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 7 [2022-07-21 09:16:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:16:56,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146805107] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:56,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:56,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 18] total 49 [2022-07-21 09:16:56,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482249260] [2022-07-21 09:16:56,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:56,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 09:16:56,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:56,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 09:16:56,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2069, Unknown=1, NotChecked=92, Total=2352 [2022-07-21 09:16:56,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 116 [2022-07-21 09:16:56,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 304 transitions, 4730 flow. Second operand has 49 states, 49 states have (on average 51.10204081632653) internal successors, (2504), 49 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:56,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:56,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 116 [2022-07-21 09:16:56,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:58,228 INFO L129 PetriNetUnfolder]: 747/4140 cut-off events. [2022-07-21 09:16:58,228 INFO L130 PetriNetUnfolder]: For 38475/38603 co-relation queries the response was YES. [2022-07-21 09:16:58,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16054 conditions, 4140 events. 747/4140 cut-off events. For 38475/38603 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 45490 event pairs, 0 based on Foata normal form. 47/3842 useless extension candidates. Maximal degree in co-relation 15970. Up to 923 conditions per place. [2022-07-21 09:16:58,265 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 122 selfloop transitions, 246 changer transitions 38/447 dead transitions. [2022-07-21 09:16:58,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 447 transitions, 7309 flow [2022-07-21 09:16:58,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 09:16:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-21 09:16:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2161 transitions. [2022-07-21 09:16:58,276 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4543734230445753 [2022-07-21 09:16:58,276 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2161 transitions. [2022-07-21 09:16:58,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2161 transitions. [2022-07-21 09:16:58,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:58,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2161 transitions. [2022-07-21 09:16:58,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 52.707317073170735) internal successors, (2161), 41 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:58,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 116.0) internal successors, (4872), 42 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:58,294 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 116.0) internal successors, (4872), 42 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:58,294 INFO L186 Difference]: Start difference. First operand has 311 places, 304 transitions, 4730 flow. Second operand 41 states and 2161 transitions. [2022-07-21 09:16:58,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 447 transitions, 7309 flow [2022-07-21 09:16:58,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 447 transitions, 6489 flow, removed 237 selfloop flow, removed 53 redundant places. [2022-07-21 09:16:58,366 INFO L242 Difference]: Finished difference. Result has 279 places, 349 transitions, 5477 flow [2022-07-21 09:16:58,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4034, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5477, PETRI_PLACES=279, PETRI_TRANSITIONS=349} [2022-07-21 09:16:58,366 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 176 predicate places. [2022-07-21 09:16:58,367 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 349 transitions, 5477 flow [2022-07-21 09:16:58,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 51.10204081632653) internal successors, (2504), 49 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:16:58,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:58,367 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:58,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:58,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:58,583 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:58,584 INFO L85 PathProgramCache]: Analyzing trace with hash 588862971, now seen corresponding path program 15 times [2022-07-21 09:16:58,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:58,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302289860] [2022-07-21 09:16:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:58,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:16:58,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302289860] [2022-07-21 09:16:58,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302289860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142881959] [2022-07-21 09:16:58,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:16:58,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:58,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:58,644 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) [2022-07-21 09:16:58,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:16:58,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:16:58,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:58,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-21 09:16:58,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:59,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:16:59,748 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-21 09:16:59,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 13 [2022-07-21 09:16:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:59,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:00,049 INFO L356 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2022-07-21 09:17:00,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 34 [2022-07-21 09:17:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:17:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142881959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:00,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:00,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 26, 21] total 46 [2022-07-21 09:17:00,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422263452] [2022-07-21 09:17:00,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:00,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 09:17:00,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:00,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 09:17:00,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 09:17:00,756 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 116 [2022-07-21 09:17:00,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 349 transitions, 5477 flow. Second operand has 46 states, 46 states have (on average 59.67391304347826) internal successors, (2745), 46 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:00,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:00,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 116 [2022-07-21 09:17:00,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:07,049 INFO L129 PetriNetUnfolder]: 3633/19370 cut-off events. [2022-07-21 09:17:07,051 INFO L130 PetriNetUnfolder]: For 227760/228976 co-relation queries the response was YES. [2022-07-21 09:17:07,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80534 conditions, 19370 events. 3633/19370 cut-off events. For 227760/228976 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 281418 event pairs, 73 based on Foata normal form. 375/18144 useless extension candidates. Maximal degree in co-relation 80471. Up to 4608 conditions per place. [2022-07-21 09:17:07,253 INFO L132 encePairwiseOnDemand]: 85/116 looper letters, 385 selfloop transitions, 1084 changer transitions 163/1678 dead transitions. [2022-07-21 09:17:07,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1678 transitions, 34819 flow [2022-07-21 09:17:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-21 09:17:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2022-07-21 09:17:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 6671 transitions. [2022-07-21 09:17:07,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5228056426332288 [2022-07-21 09:17:07,260 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 6671 transitions. [2022-07-21 09:17:07,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 6671 transitions. [2022-07-21 09:17:07,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:07,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 6671 transitions. [2022-07-21 09:17:07,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 60.64545454545455) internal successors, (6671), 110 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:07,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 116.0) internal successors, (12876), 111 states have internal predecessors, (12876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:07,282 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 116.0) internal successors, (12876), 111 states have internal predecessors, (12876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:07,282 INFO L186 Difference]: Start difference. First operand has 279 places, 349 transitions, 5477 flow. Second operand 110 states and 6671 transitions. [2022-07-21 09:17:07,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1678 transitions, 34819 flow [2022-07-21 09:17:07,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1678 transitions, 33018 flow, removed 527 selfloop flow, removed 26 redundant places. [2022-07-21 09:17:07,880 INFO L242 Difference]: Finished difference. Result has 422 places, 1344 transitions, 30101 flow [2022-07-21 09:17:07,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=5002, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=30101, PETRI_PLACES=422, PETRI_TRANSITIONS=1344} [2022-07-21 09:17:07,881 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 319 predicate places. [2022-07-21 09:17:07,881 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 1344 transitions, 30101 flow [2022-07-21 09:17:07,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 59.67391304347826) internal successors, (2745), 46 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:07,882 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:07,882 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:17:07,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 09:17:08,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:08,095 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:08,096 INFO L85 PathProgramCache]: Analyzing trace with hash -464182535, now seen corresponding path program 16 times [2022-07-21 09:17:08,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:08,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188377127] [2022-07-21 09:17:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:08,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:17:08,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188377127] [2022-07-21 09:17:08,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188377127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731332644] [2022-07-21 09:17:08,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:17:08,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:08,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:08,143 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) [2022-07-21 09:17:08,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:17:08,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:17:08,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:08,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:17:08,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:17:08,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:17:08,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731332644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:08,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:08,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-07-21 09:17:08,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671425319] [2022-07-21 09:17:08,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:08,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:17:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:08,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:17:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:17:08,399 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-07-21 09:17:08,399 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 1344 transitions, 30101 flow. Second operand has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:08,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:08,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-07-21 09:17:08,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:16,022 INFO L129 PetriNetUnfolder]: 3888/21892 cut-off events. [2022-07-21 09:17:16,023 INFO L130 PetriNetUnfolder]: For 623888/626046 co-relation queries the response was YES. [2022-07-21 09:17:16,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133548 conditions, 21892 events. 3888/21892 cut-off events. For 623888/626046 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 328721 event pairs, 433 based on Foata normal form. 254/20372 useless extension candidates. Maximal degree in co-relation 133425. Up to 5114 conditions per place. [2022-07-21 09:17:16,419 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 765 selfloop transitions, 723 changer transitions 13/1693 dead transitions. [2022-07-21 09:17:16,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1693 transitions, 41603 flow [2022-07-21 09:17:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:17:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:17:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2022-07-21 09:17:16,421 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9181034482758621 [2022-07-21 09:17:16,421 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2022-07-21 09:17:16,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2022-07-21 09:17:16,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:16,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2022-07-21 09:17:16,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,423 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:16,423 INFO L186 Difference]: Start difference. First operand has 422 places, 1344 transitions, 30101 flow. Second operand 6 states and 639 transitions. [2022-07-21 09:17:16,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1693 transitions, 41603 flow [2022-07-21 09:17:19,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1693 transitions, 32802 flow, removed 4322 selfloop flow, removed 21 redundant places. [2022-07-21 09:17:19,502 INFO L242 Difference]: Finished difference. Result has 404 places, 1653 transitions, 32629 flow [2022-07-21 09:17:19,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=23472, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=32629, PETRI_PLACES=404, PETRI_TRANSITIONS=1653} [2022-07-21 09:17:19,509 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 301 predicate places. [2022-07-21 09:17:19,509 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 1653 transitions, 32629 flow [2022-07-21 09:17:19,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:19,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:19,509 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:17:19,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:19,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:19,723 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:19,724 INFO L85 PathProgramCache]: Analyzing trace with hash -342402215, now seen corresponding path program 17 times [2022-07-21 09:17:19,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:19,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581753816] [2022-07-21 09:17:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:19,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:17:19,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:19,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581753816] [2022-07-21 09:17:19,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581753816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:19,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652488683] [2022-07-21 09:17:19,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:17:19,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:19,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:19,864 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) [2022-07-21 09:17:19,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:17:19,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 09:17:19,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:17:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:20,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:17:20,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652488683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:20,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:20,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 18] total 49 [2022-07-21 09:17:20,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27587451] [2022-07-21 09:17:20,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:20,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 09:17:20,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:20,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 09:17:20,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1956, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 09:17:20,978 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-07-21 09:17:20,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1653 transitions, 32629 flow. Second operand has 49 states, 49 states have (on average 88.18367346938776) internal successors, (4321), 49 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:20,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:20,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-07-21 09:17:20,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:24,918 INFO L129 PetriNetUnfolder]: 1298/8566 cut-off events. [2022-07-21 09:17:24,919 INFO L130 PetriNetUnfolder]: For 228056/229160 co-relation queries the response was YES. [2022-07-21 09:17:25,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50526 conditions, 8566 events. 1298/8566 cut-off events. For 228056/229160 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 109922 event pairs, 274 based on Foata normal form. 180/8035 useless extension candidates. Maximal degree in co-relation 50402. Up to 1968 conditions per place. [2022-07-21 09:17:25,083 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 391 selfloop transitions, 81 changer transitions 182/747 dead transitions. [2022-07-21 09:17:25,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 747 transitions, 16753 flow [2022-07-21 09:17:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:17:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:17:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2851 transitions. [2022-07-21 09:17:25,086 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7680495689655172 [2022-07-21 09:17:25,086 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2851 transitions. [2022-07-21 09:17:25,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2851 transitions. [2022-07-21 09:17:25,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:25,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2851 transitions. [2022-07-21 09:17:25,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 89.09375) internal successors, (2851), 32 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:25,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 116.0) internal successors, (3828), 33 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:25,092 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 116.0) internal successors, (3828), 33 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:25,092 INFO L186 Difference]: Start difference. First operand has 404 places, 1653 transitions, 32629 flow. Second operand 32 states and 2851 transitions. [2022-07-21 09:17:25,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 747 transitions, 16753 flow [2022-07-21 09:17:26,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 747 transitions, 15576 flow, removed 280 selfloop flow, removed 30 redundant places. [2022-07-21 09:17:26,324 INFO L242 Difference]: Finished difference. Result has 373 places, 556 transitions, 10815 flow [2022-07-21 09:17:26,324 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=13567, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10815, PETRI_PLACES=373, PETRI_TRANSITIONS=556} [2022-07-21 09:17:26,325 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 270 predicate places. [2022-07-21 09:17:26,325 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 556 transitions, 10815 flow [2022-07-21 09:17:26,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 88.18367346938776) internal successors, (4321), 49 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:26,326 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:26,326 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:17:26,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:26,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:26,539 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:26,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:26,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1358639066, now seen corresponding path program 18 times [2022-07-21 09:17:26,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:26,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706583762] [2022-07-21 09:17:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:26,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:27,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:27,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706583762] [2022-07-21 09:17:27,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706583762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:27,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278846013] [2022-07-21 09:17:27,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:17:27,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:27,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:27,098 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) [2022-07-21 09:17:27,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:17:27,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 09:17:27,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 09:17:27,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:40,206 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-07-21 09:17:40,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 10 [2022-07-21 09:17:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 54 refuted. 18 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 09:17:40,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:40,367 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 09:17:40,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-07-21 09:17:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 09:17:40,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278846013] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:40,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:40,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 59 [2022-07-21 09:17:40,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429734138] [2022-07-21 09:17:40,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:40,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 09:17:40,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:40,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 09:17:40,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=3059, Unknown=6, NotChecked=0, Total=3422 [2022-07-21 09:17:40,967 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 116 [2022-07-21 09:17:40,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 556 transitions, 10815 flow. Second operand has 59 states, 59 states have (on average 59.03389830508475) internal successors, (3483), 59 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:17:40,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:40,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 116 [2022-07-21 09:17:40,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand