./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:12:14,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:12:14,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:12:14,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:12:14,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:12:14,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:12:14,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:12:14,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:12:14,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:12:14,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:12:14,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:12:14,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:12:14,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:12:14,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:12:14,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:12:14,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:12:14,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:12:14,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:12:14,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:12:14,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:12:14,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:12:14,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:12:14,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:12:14,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:12:14,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:12:14,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:12:14,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:12:14,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:12:14,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:12:14,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:12:14,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:12:14,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:12:14,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:12:14,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:12:14,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:12:14,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:12:14,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:12:14,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:12:14,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:12:14,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:12:14,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:12:14,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:12:14,952 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:12:14,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:12:14,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:12:14,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:12:14,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:12:14,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:12:14,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:12:14,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:12:14,955 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:12:14,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:12:14,956 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:12:14,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:12:14,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:12:14,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:12:14,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:12:14,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:12:14,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:12:14,957 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:12:14,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:12:14,958 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:12:14,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:12:14,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:12:14,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:12:14,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:12:14,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:12:14,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:12:14,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:12:14,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:12:14,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:12:14,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:12:14,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:12:14,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:12:14,960 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:12:14,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:12:14,960 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:12:14,960 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:12:15,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:12:15,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:12:15,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:12:15,275 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:12:15,276 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:12:15,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-31 03:12:16,413 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:12:16,590 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:12:16,591 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-31 03:12:16,595 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd3dfa955/2dbb89890fec4a43b2f2340603681048/FLAGd2b1760d0 [2023-08-31 03:12:16,603 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd3dfa955/2dbb89890fec4a43b2f2340603681048 [2023-08-31 03:12:16,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:12:16,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:12:16,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:12:16,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:12:16,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:12:16,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24439fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16, skipping insertion in model container [2023-08-31 03:12:16,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:12:16,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:12:16,726 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2023-08-31 03:12:16,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:12:16,755 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:12:16,796 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2023-08-31 03:12:16,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:12:16,814 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:12:16,815 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:12:16,819 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:12:16,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16 WrapperNode [2023-08-31 03:12:16,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:12:16,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:12:16,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:12:16,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:12:16,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,870 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 184 [2023-08-31 03:12:16,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:12:16,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:12:16,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:12:16,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:12:16,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,914 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:12:16,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:12:16,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:12:16,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:12:16,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (1/1) ... [2023-08-31 03:12:16,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:12:16,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:16,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 03:12:17,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 03:12:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:12:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:12:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:12:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:12:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:12:17,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:12:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:12:17,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:12:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 03:12:17,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 03:12:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:12:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:12:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:12:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 03:12:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:12:17,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:12:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:12:17,019 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:12:17,094 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:12:17,095 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:12:17,339 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:12:17,413 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:12:17,413 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 03:12:17,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:12:17 BoogieIcfgContainer [2023-08-31 03:12:17,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:12:17,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:12:17,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:12:17,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:12:17,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:12:16" (1/3) ... [2023-08-31 03:12:17,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d38491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:12:17, skipping insertion in model container [2023-08-31 03:12:17,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:12:16" (2/3) ... [2023-08-31 03:12:17,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d38491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:12:17, skipping insertion in model container [2023-08-31 03:12:17,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:12:17" (3/3) ... [2023-08-31 03:12:17,421 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2023-08-31 03:12:17,440 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:12:17,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:12:17,448 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:12:17,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:12:17,498 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 03:12:17,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 149 transitions, 322 flow [2023-08-31 03:12:17,572 INFO L130 PetriNetUnfolder]: 9/146 cut-off events. [2023-08-31 03:12:17,572 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:12:17,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 146 events. 9/146 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-31 03:12:17,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 149 transitions, 322 flow [2023-08-31 03:12:17,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 136 transitions, 290 flow [2023-08-31 03:12:17,581 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:12:17,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 136 transitions, 290 flow [2023-08-31 03:12:17,588 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 136 transitions, 290 flow [2023-08-31 03:12:17,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 136 transitions, 290 flow [2023-08-31 03:12:17,627 INFO L130 PetriNetUnfolder]: 9/136 cut-off events. [2023-08-31 03:12:17,628 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:12:17,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 136 events. 9/136 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-31 03:12:17,632 INFO L119 LiptonReduction]: Number of co-enabled transitions 1464 [2023-08-31 03:12:21,366 INFO L134 LiptonReduction]: Checked pairs total: 1540 [2023-08-31 03:12:21,366 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-31 03:12:21,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:12:21,382 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28f12ed3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:12:21,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 03:12:21,386 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2023-08-31 03:12:21,400 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:12:21,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:21,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:21,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:21,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1628863720, now seen corresponding path program 1 times [2023-08-31 03:12:21,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:21,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811023339] [2023-08-31 03:12:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:21,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:21,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:21,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811023339] [2023-08-31 03:12:21,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811023339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:12:21,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:12:21,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:12:21,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519632270] [2023-08-31 03:12:21,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:12:21,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:12:21,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:12:21,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:12:21,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:12:21,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 279 [2023-08-31 03:12:21,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:21,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:12:21,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 279 [2023-08-31 03:12:21,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:12:22,102 INFO L130 PetriNetUnfolder]: 169/271 cut-off events. [2023-08-31 03:12:22,102 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-31 03:12:22,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 271 events. 169/271 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 667 event pairs, 108 based on Foata normal form. 8/235 useless extension candidates. Maximal degree in co-relation 372. Up to 217 conditions per place. [2023-08-31 03:12:22,105 INFO L137 encePairwiseOnDemand]: 273/279 looper letters, 21 selfloop transitions, 2 changer transitions 11/34 dead transitions. [2023-08-31 03:12:22,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 163 flow [2023-08-31 03:12:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:12:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:12:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 545 transitions. [2023-08-31 03:12:22,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883512544802867 [2023-08-31 03:12:22,120 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 545 transitions. [2023-08-31 03:12:22,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 545 transitions. [2023-08-31 03:12:22,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:12:22,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 545 transitions. [2023-08-31 03:12:22,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:22,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 279.0) internal successors, (1395), 5 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:22,134 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 279.0) internal successors, (1395), 5 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:22,135 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 4 states and 545 transitions. [2023-08-31 03:12:22,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 163 flow [2023-08-31 03:12:22,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 145 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 03:12:22,140 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 68 flow [2023-08-31 03:12:22,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-08-31 03:12:22,144 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-31 03:12:22,144 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 68 flow [2023-08-31 03:12:22,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:22,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:22,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:22,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:12:22,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:22,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:22,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1588577435, now seen corresponding path program 1 times [2023-08-31 03:12:22,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:22,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339369758] [2023-08-31 03:12:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:22,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:22,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:22,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339369758] [2023-08-31 03:12:22,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339369758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:12:22,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30306554] [2023-08-31 03:12:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:22,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:22,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:22,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:12:22,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:12:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:22,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:12:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:12:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:22,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:12:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:22,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30306554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:12:22,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:12:22,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-08-31 03:12:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425874868] [2023-08-31 03:12:22,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:12:22,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:12:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:12:22,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:12:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:12:22,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 279 [2023-08-31 03:12:22,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 68 flow. Second operand has 14 states, 14 states have (on average 124.07142857142857) internal successors, (1737), 14 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:22,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:12:22,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 279 [2023-08-31 03:12:22,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:12:23,133 INFO L130 PetriNetUnfolder]: 203/328 cut-off events. [2023-08-31 03:12:23,133 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-31 03:12:23,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 328 events. 203/328 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 907 event pairs, 108 based on Foata normal form. 30/356 useless extension candidates. Maximal degree in co-relation 767. Up to 217 conditions per place. [2023-08-31 03:12:23,135 INFO L137 encePairwiseOnDemand]: 273/279 looper letters, 21 selfloop transitions, 3 changer transitions 24/48 dead transitions. [2023-08-31 03:12:23,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 48 transitions, 228 flow [2023-08-31 03:12:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:12:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:12:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 778 transitions. [2023-08-31 03:12:23,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647550776583035 [2023-08-31 03:12:23,137 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 778 transitions. [2023-08-31 03:12:23,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 778 transitions. [2023-08-31 03:12:23,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:12:23,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 778 transitions. [2023-08-31 03:12:23,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:23,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:23,142 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:23,142 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 68 flow. Second operand 6 states and 778 transitions. [2023-08-31 03:12:23,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 48 transitions, 228 flow [2023-08-31 03:12:23,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 48 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 03:12:23,144 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 92 flow [2023-08-31 03:12:23,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-31 03:12:23,144 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-31 03:12:23,145 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 92 flow [2023-08-31 03:12:23,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 124.07142857142857) internal successors, (1737), 14 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:23,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:23,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:23,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:12:23,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:23,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:23,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1843269852, now seen corresponding path program 2 times [2023-08-31 03:12:23,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:23,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581710295] [2023-08-31 03:12:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:25,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:25,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581710295] [2023-08-31 03:12:25,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581710295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:12:25,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275955782] [2023-08-31 03:12:25,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:12:25,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:25,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:25,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:12:25,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:12:25,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 03:12:25,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:12:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 03:12:25,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:12:25,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:12:25,544 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 23 [2023-08-31 03:12:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:12:25,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:12:25,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275955782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:12:25,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:12:25,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-31 03:12:25,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173463714] [2023-08-31 03:12:25,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:12:25,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 03:12:25,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:12:25,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 03:12:25,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:12:25,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-31 03:12:25,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 92 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:25,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:12:25,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-31 03:12:25,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:12:26,136 INFO L130 PetriNetUnfolder]: 169/288 cut-off events. [2023-08-31 03:12:26,137 INFO L131 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2023-08-31 03:12:26,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 288 events. 169/288 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 855 event pairs, 32 based on Foata normal form. 25/312 useless extension candidates. Maximal degree in co-relation 847. Up to 137 conditions per place. [2023-08-31 03:12:26,138 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 50 selfloop transitions, 13 changer transitions 13/76 dead transitions. [2023-08-31 03:12:26,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 405 flow [2023-08-31 03:12:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:12:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:12:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 975 transitions. [2023-08-31 03:12:26,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368279569892473 [2023-08-31 03:12:26,140 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 975 transitions. [2023-08-31 03:12:26,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 975 transitions. [2023-08-31 03:12:26,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:12:26,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 975 transitions. [2023-08-31 03:12:26,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.875) internal successors, (975), 8 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:26,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:26,146 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:26,146 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 92 flow. Second operand 8 states and 975 transitions. [2023-08-31 03:12:26,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 405 flow [2023-08-31 03:12:26,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 76 transitions, 357 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-31 03:12:26,148 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 181 flow [2023-08-31 03:12:26,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=181, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-31 03:12:26,149 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-08-31 03:12:26,149 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 181 flow [2023-08-31 03:12:26,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:26,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:26,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:26,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:12:26,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-31 03:12:26,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:26,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:26,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1801503998, now seen corresponding path program 3 times [2023-08-31 03:12:26,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:26,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905435107] [2023-08-31 03:12:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:26,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905435107] [2023-08-31 03:12:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905435107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:12:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204058341] [2023-08-31 03:12:28,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:12:28,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:28,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:28,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:12:28,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:12:28,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 03:12:28,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:12:28,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 03:12:28,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:12:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:12:28,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:12:28,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204058341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:12:28,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:12:28,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-31 03:12:28,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705853979] [2023-08-31 03:12:28,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:12:28,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 03:12:28,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:12:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 03:12:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:12:28,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 279 [2023-08-31 03:12:28,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 181 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:28,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:12:28,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 279 [2023-08-31 03:12:28,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:12:28,730 INFO L130 PetriNetUnfolder]: 245/402 cut-off events. [2023-08-31 03:12:28,730 INFO L131 PetriNetUnfolder]: For 862/862 co-relation queries the response was YES. [2023-08-31 03:12:28,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 402 events. 245/402 cut-off events. For 862/862 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1271 event pairs, 53 based on Foata normal form. 5/406 useless extension candidates. Maximal degree in co-relation 1480. Up to 215 conditions per place. [2023-08-31 03:12:28,732 INFO L137 encePairwiseOnDemand]: 269/279 looper letters, 52 selfloop transitions, 21 changer transitions 13/86 dead transitions. [2023-08-31 03:12:28,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 86 transitions, 560 flow [2023-08-31 03:12:28,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:12:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:12:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1010 transitions. [2023-08-31 03:12:28,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525089605734767 [2023-08-31 03:12:28,734 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1010 transitions. [2023-08-31 03:12:28,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1010 transitions. [2023-08-31 03:12:28,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:12:28,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1010 transitions. [2023-08-31 03:12:28,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.25) internal successors, (1010), 8 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:28,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:28,740 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:28,740 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 181 flow. Second operand 8 states and 1010 transitions. [2023-08-31 03:12:28,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 86 transitions, 560 flow [2023-08-31 03:12:28,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 524 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-31 03:12:28,744 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 341 flow [2023-08-31 03:12:28,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-31 03:12:28,745 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-08-31 03:12:28,745 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 341 flow [2023-08-31 03:12:28,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:28,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:28,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:28,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 03:12:28,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:28,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:28,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:28,952 INFO L85 PathProgramCache]: Analyzing trace with hash -516255946, now seen corresponding path program 4 times [2023-08-31 03:12:28,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:28,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827187595] [2023-08-31 03:12:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:28,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:29,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:29,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827187595] [2023-08-31 03:12:29,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827187595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:12:29,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081727743] [2023-08-31 03:12:29,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:12:29,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:29,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:29,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:12:29,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:12:29,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:12:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:12:29,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 03:12:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:12:30,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:12:30,241 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 34 [2023-08-31 03:12:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:30,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:12:30,682 INFO L321 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-08-31 03:12:30,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 55 [2023-08-31 03:12:30,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:12:30,689 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 7 [2023-08-31 03:12:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:30,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081727743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:12:30,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:12:30,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-31 03:12:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401635555] [2023-08-31 03:12:30,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:12:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 03:12:30,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:12:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 03:12:30,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=806, Unknown=1, NotChecked=0, Total=992 [2023-08-31 03:12:32,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 279 [2023-08-31 03:12:32,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 341 flow. Second operand has 32 states, 32 states have (on average 91.96875) internal successors, (2943), 32 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:32,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:12:32,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 279 [2023-08-31 03:12:32,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:12:37,128 INFO L130 PetriNetUnfolder]: 822/1460 cut-off events. [2023-08-31 03:12:37,129 INFO L131 PetriNetUnfolder]: For 5229/5229 co-relation queries the response was YES. [2023-08-31 03:12:37,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6306 conditions, 1460 events. 822/1460 cut-off events. For 5229/5229 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7461 event pairs, 118 based on Foata normal form. 6/1461 useless extension candidates. Maximal degree in co-relation 6255. Up to 388 conditions per place. [2023-08-31 03:12:37,138 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 259 selfloop transitions, 86 changer transitions 79/424 dead transitions. [2023-08-31 03:12:37,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 424 transitions, 3019 flow [2023-08-31 03:12:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-31 03:12:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-31 03:12:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4594 transitions. [2023-08-31 03:12:37,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3503393578891177 [2023-08-31 03:12:37,155 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4594 transitions. [2023-08-31 03:12:37,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4594 transitions. [2023-08-31 03:12:37,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:12:37,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4594 transitions. [2023-08-31 03:12:37,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 97.74468085106383) internal successors, (4594), 47 states have internal predecessors, (4594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:37,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 279.0) internal successors, (13392), 48 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:37,185 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 279.0) internal successors, (13392), 48 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:37,185 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 341 flow. Second operand 47 states and 4594 transitions. [2023-08-31 03:12:37,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 424 transitions, 3019 flow [2023-08-31 03:12:37,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 424 transitions, 2921 flow, removed 49 selfloop flow, removed 1 redundant places. [2023-08-31 03:12:37,207 INFO L231 Difference]: Finished difference. Result has 112 places, 135 transitions, 1302 flow [2023-08-31 03:12:37,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1302, PETRI_PLACES=112, PETRI_TRANSITIONS=135} [2023-08-31 03:12:37,208 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 83 predicate places. [2023-08-31 03:12:37,209 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 135 transitions, 1302 flow [2023-08-31 03:12:37,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 91.96875) internal successors, (2943), 32 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:37,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:37,210 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:37,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:12:37,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:37,429 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:37,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:37,430 INFO L85 PathProgramCache]: Analyzing trace with hash -701119202, now seen corresponding path program 5 times [2023-08-31 03:12:37,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:37,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454696542] [2023-08-31 03:12:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:37,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:38,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:38,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454696542] [2023-08-31 03:12:38,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454696542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:12:38,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458475833] [2023-08-31 03:12:38,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:12:38,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:38,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:38,339 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:12:38,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:12:38,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:12:38,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:12:38,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-31 03:12:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:12:38,825 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-08-31 03:12:38,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 41 [2023-08-31 03:12:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:38,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:12:39,093 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:12:39,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-08-31 03:12:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:40,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458475833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:12:40,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:12:40,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-08-31 03:12:40,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043826884] [2023-08-31 03:12:40,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:12:40,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 03:12:40,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:12:40,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 03:12:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2023-08-31 03:12:40,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 279 [2023-08-31 03:12:40,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 135 transitions, 1302 flow. Second operand has 30 states, 30 states have (on average 110.1) internal successors, (3303), 30 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:40,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:12:40,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 279 [2023-08-31 03:12:40,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:12:43,110 INFO L130 PetriNetUnfolder]: 952/1727 cut-off events. [2023-08-31 03:12:43,110 INFO L131 PetriNetUnfolder]: For 13283/13283 co-relation queries the response was YES. [2023-08-31 03:12:43,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9168 conditions, 1727 events. 952/1727 cut-off events. For 13283/13283 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9421 event pairs, 221 based on Foata normal form. 1/1723 useless extension candidates. Maximal degree in co-relation 9129. Up to 720 conditions per place. [2023-08-31 03:12:43,120 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 213 selfloop transitions, 86 changer transitions 14/313 dead transitions. [2023-08-31 03:12:43,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 313 transitions, 3169 flow [2023-08-31 03:12:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 03:12:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 03:12:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2579 transitions. [2023-08-31 03:12:43,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42016943629846853 [2023-08-31 03:12:43,125 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2579 transitions. [2023-08-31 03:12:43,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2579 transitions. [2023-08-31 03:12:43,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:12:43,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2579 transitions. [2023-08-31 03:12:43,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 117.22727272727273) internal successors, (2579), 22 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:43,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 279.0) internal successors, (6417), 23 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:43,135 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 279.0) internal successors, (6417), 23 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:43,136 INFO L175 Difference]: Start difference. First operand has 112 places, 135 transitions, 1302 flow. Second operand 22 states and 2579 transitions. [2023-08-31 03:12:43,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 313 transitions, 3169 flow [2023-08-31 03:12:43,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 313 transitions, 2651 flow, removed 252 selfloop flow, removed 13 redundant places. [2023-08-31 03:12:43,161 INFO L231 Difference]: Finished difference. Result has 123 places, 185 transitions, 1852 flow [2023-08-31 03:12:43,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1852, PETRI_PLACES=123, PETRI_TRANSITIONS=185} [2023-08-31 03:12:43,162 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 94 predicate places. [2023-08-31 03:12:43,163 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 185 transitions, 1852 flow [2023-08-31 03:12:43,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 110.1) internal successors, (3303), 30 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:43,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:43,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:43,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:12:43,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:43,372 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:43,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1563406906, now seen corresponding path program 6 times [2023-08-31 03:12:43,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:43,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152279694] [2023-08-31 03:12:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:43,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:44,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152279694] [2023-08-31 03:12:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152279694] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:12:44,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933369306] [2023-08-31 03:12:44,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:12:44,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:44,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:44,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:12:44,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:12:44,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-31 03:12:44,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:12:44,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 03:12:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:12:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:12:44,492 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 22 [2023-08-31 03:12:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:12:44,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:12:44,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933369306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:12:44,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:12:44,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-08-31 03:12:44,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517522346] [2023-08-31 03:12:44,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:12:44,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 03:12:44,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:12:44,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 03:12:44,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:12:44,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-31 03:12:44,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 185 transitions, 1852 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:44,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:12:44,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-31 03:12:44,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:12:45,202 INFO L130 PetriNetUnfolder]: 997/1817 cut-off events. [2023-08-31 03:12:45,203 INFO L131 PetriNetUnfolder]: For 15273/15273 co-relation queries the response was YES. [2023-08-31 03:12:45,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10221 conditions, 1817 events. 997/1817 cut-off events. For 15273/15273 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10120 event pairs, 233 based on Foata normal form. 4/1812 useless extension candidates. Maximal degree in co-relation 10135. Up to 1273 conditions per place. [2023-08-31 03:12:45,216 INFO L137 encePairwiseOnDemand]: 269/279 looper letters, 157 selfloop transitions, 67 changer transitions 15/239 dead transitions. [2023-08-31 03:12:45,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 239 transitions, 2791 flow [2023-08-31 03:12:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:12:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:12:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 971 transitions. [2023-08-31 03:12:45,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4350358422939068 [2023-08-31 03:12:45,221 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 971 transitions. [2023-08-31 03:12:45,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 971 transitions. [2023-08-31 03:12:45,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:12:45,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 971 transitions. [2023-08-31 03:12:45,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.375) internal successors, (971), 8 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:45,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:45,237 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:45,238 INFO L175 Difference]: Start difference. First operand has 123 places, 185 transitions, 1852 flow. Second operand 8 states and 971 transitions. [2023-08-31 03:12:45,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 239 transitions, 2791 flow [2023-08-31 03:12:45,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 239 transitions, 2633 flow, removed 64 selfloop flow, removed 7 redundant places. [2023-08-31 03:12:45,282 INFO L231 Difference]: Finished difference. Result has 127 places, 199 transitions, 2093 flow [2023-08-31 03:12:45,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2093, PETRI_PLACES=127, PETRI_TRANSITIONS=199} [2023-08-31 03:12:45,283 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2023-08-31 03:12:45,283 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 199 transitions, 2093 flow [2023-08-31 03:12:45,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:45,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:45,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:45,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 03:12:45,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:45,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:45,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:45,490 INFO L85 PathProgramCache]: Analyzing trace with hash 572239084, now seen corresponding path program 7 times [2023-08-31 03:12:45,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:45,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030559582] [2023-08-31 03:12:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:45,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:46,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:46,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030559582] [2023-08-31 03:12:46,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030559582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:12:46,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656885756] [2023-08-31 03:12:46,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:12:46,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:46,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:46,526 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:12:46,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:12:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 03:12:46,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:12:47,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:12:47,006 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 29 [2023-08-31 03:12:47,130 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:12:47,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:12:47,132 INFO L350 Elim1Store]: Elim1 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 61 treesize of output 34 [2023-08-31 03:12:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:47,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:12:47,379 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:12:47,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 89 [2023-08-31 03:12:47,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:12:47,858 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 7 [2023-08-31 03:12:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:48,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656885756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:12:48,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:12:48,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 30 [2023-08-31 03:12:48,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164166967] [2023-08-31 03:12:48,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:12:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 03:12:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:12:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 03:12:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=874, Unknown=1, NotChecked=0, Total=992 [2023-08-31 03:12:49,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 279 [2023-08-31 03:12:49,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 199 transitions, 2093 flow. Second operand has 32 states, 32 states have (on average 85.84375) internal successors, (2747), 32 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:49,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:12:49,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 279 [2023-08-31 03:12:49,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:12:53,259 INFO L130 PetriNetUnfolder]: 1052/1936 cut-off events. [2023-08-31 03:12:53,259 INFO L131 PetriNetUnfolder]: For 18632/18632 co-relation queries the response was YES. [2023-08-31 03:12:53,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11490 conditions, 1936 events. 1052/1936 cut-off events. For 18632/18632 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11072 event pairs, 225 based on Foata normal form. 1/1928 useless extension candidates. Maximal degree in co-relation 11397. Up to 791 conditions per place. [2023-08-31 03:12:53,271 INFO L137 encePairwiseOnDemand]: 267/279 looper letters, 222 selfloop transitions, 76 changer transitions 15/313 dead transitions. [2023-08-31 03:12:53,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 313 transitions, 3568 flow [2023-08-31 03:12:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 03:12:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 03:12:53,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1661 transitions. [2023-08-31 03:12:53,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307447232178415 [2023-08-31 03:12:53,274 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1661 transitions. [2023-08-31 03:12:53,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1661 transitions. [2023-08-31 03:12:53,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:12:53,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1661 transitions. [2023-08-31 03:12:53,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.27777777777777) internal successors, (1661), 18 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:53,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 279.0) internal successors, (5301), 19 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:53,280 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 279.0) internal successors, (5301), 19 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:53,280 INFO L175 Difference]: Start difference. First operand has 127 places, 199 transitions, 2093 flow. Second operand 18 states and 1661 transitions. [2023-08-31 03:12:53,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 313 transitions, 3568 flow [2023-08-31 03:12:53,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 313 transitions, 3400 flow, removed 34 selfloop flow, removed 4 redundant places. [2023-08-31 03:12:53,309 INFO L231 Difference]: Finished difference. Result has 144 places, 212 transitions, 2381 flow [2023-08-31 03:12:53,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2381, PETRI_PLACES=144, PETRI_TRANSITIONS=212} [2023-08-31 03:12:53,310 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2023-08-31 03:12:53,310 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 212 transitions, 2381 flow [2023-08-31 03:12:53,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 85.84375) internal successors, (2747), 32 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:53,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:53,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:53,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 03:12:53,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:53,516 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:53,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:53,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2087705102, now seen corresponding path program 8 times [2023-08-31 03:12:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:53,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651822582] [2023-08-31 03:12:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:54,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:54,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651822582] [2023-08-31 03:12:54,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651822582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:12:54,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370151224] [2023-08-31 03:12:54,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:12:54,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:54,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:54,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:12:54,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:12:54,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 03:12:54,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:12:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 03:12:54,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:12:54,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:12:54,690 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 34 [2023-08-31 03:12:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:12:54,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:12:54,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370151224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:12:54,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:12:54,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-08-31 03:12:54,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012485516] [2023-08-31 03:12:54,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:12:54,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 03:12:54,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:12:54,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 03:12:54,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:12:54,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-31 03:12:54,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 212 transitions, 2381 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:54,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:12:54,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-31 03:12:54,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:12:55,318 INFO L130 PetriNetUnfolder]: 1066/1952 cut-off events. [2023-08-31 03:12:55,319 INFO L131 PetriNetUnfolder]: For 19876/19876 co-relation queries the response was YES. [2023-08-31 03:12:55,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11962 conditions, 1952 events. 1066/1952 cut-off events. For 19876/19876 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11115 event pairs, 219 based on Foata normal form. 3/1946 useless extension candidates. Maximal degree in co-relation 11871. Up to 1159 conditions per place. [2023-08-31 03:12:55,336 INFO L137 encePairwiseOnDemand]: 269/279 looper letters, 165 selfloop transitions, 70 changer transitions 22/257 dead transitions. [2023-08-31 03:12:55,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 257 transitions, 3292 flow [2023-08-31 03:12:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:12:55,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:12:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 973 transitions. [2023-08-31 03:12:55,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359318996415771 [2023-08-31 03:12:55,338 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 973 transitions. [2023-08-31 03:12:55,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 973 transitions. [2023-08-31 03:12:55,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:12:55,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 973 transitions. [2023-08-31 03:12:55,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.625) internal successors, (973), 8 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:55,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:55,343 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:55,343 INFO L175 Difference]: Start difference. First operand has 144 places, 212 transitions, 2381 flow. Second operand 8 states and 973 transitions. [2023-08-31 03:12:55,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 257 transitions, 3292 flow [2023-08-31 03:12:55,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 257 transitions, 3198 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-31 03:12:55,380 INFO L231 Difference]: Finished difference. Result has 143 places, 209 transitions, 2439 flow [2023-08-31 03:12:55,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2439, PETRI_PLACES=143, PETRI_TRANSITIONS=209} [2023-08-31 03:12:55,380 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2023-08-31 03:12:55,381 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 209 transitions, 2439 flow [2023-08-31 03:12:55,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:55,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:55,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:55,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 03:12:55,586 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,SelfDestructingSolverStorable8 [2023-08-31 03:12:55,586 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:55,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash -740666688, now seen corresponding path program 9 times [2023-08-31 03:12:55,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:55,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714828214] [2023-08-31 03:12:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:55,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:56,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:56,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714828214] [2023-08-31 03:12:56,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714828214] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:12:56,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319371756] [2023-08-31 03:12:56,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:12:56,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:56,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:56,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:12:56,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:12:56,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 03:12:56,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:12:56,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 03:12:56,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:12:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:12:57,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:12:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319371756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:12:57,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:12:57,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-31 03:12:57,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593878887] [2023-08-31 03:12:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:12:57,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 03:12:57,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:12:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 03:12:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:12:57,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 279 [2023-08-31 03:12:57,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 209 transitions, 2439 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:57,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:12:57,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 279 [2023-08-31 03:12:57,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:12:57,570 INFO L130 PetriNetUnfolder]: 1066/1943 cut-off events. [2023-08-31 03:12:57,570 INFO L131 PetriNetUnfolder]: For 21186/21186 co-relation queries the response was YES. [2023-08-31 03:12:57,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12398 conditions, 1943 events. 1066/1943 cut-off events. For 21186/21186 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10976 event pairs, 238 based on Foata normal form. 2/1936 useless extension candidates. Maximal degree in co-relation 12306. Up to 1358 conditions per place. [2023-08-31 03:12:57,588 INFO L137 encePairwiseOnDemand]: 269/279 looper letters, 179 selfloop transitions, 61 changer transitions 14/254 dead transitions. [2023-08-31 03:12:57,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 254 transitions, 3340 flow [2023-08-31 03:12:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:12:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:12:57,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1003 transitions. [2023-08-31 03:12:57,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44937275985663083 [2023-08-31 03:12:57,590 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1003 transitions. [2023-08-31 03:12:57,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1003 transitions. [2023-08-31 03:12:57,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:12:57,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1003 transitions. [2023-08-31 03:12:57,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.375) internal successors, (1003), 8 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:57,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:57,595 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:57,595 INFO L175 Difference]: Start difference. First operand has 143 places, 209 transitions, 2439 flow. Second operand 8 states and 1003 transitions. [2023-08-31 03:12:57,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 254 transitions, 3340 flow [2023-08-31 03:12:57,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 254 transitions, 3189 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-08-31 03:12:57,653 INFO L231 Difference]: Finished difference. Result has 144 places, 221 transitions, 2633 flow [2023-08-31 03:12:57,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2633, PETRI_PLACES=144, PETRI_TRANSITIONS=221} [2023-08-31 03:12:57,654 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2023-08-31 03:12:57,654 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 221 transitions, 2633 flow [2023-08-31 03:12:57,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:12:57,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:12:57,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:12:57,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 03:12:57,861 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,SelfDestructingSolverStorable9 [2023-08-31 03:12:57,861 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:12:57,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:12:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1485273708, now seen corresponding path program 10 times [2023-08-31 03:12:57,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:12:57,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100991982] [2023-08-31 03:12:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:12:57,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:12:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:12:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:12:59,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:12:59,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100991982] [2023-08-31 03:12:59,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100991982] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:12:59,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670044380] [2023-08-31 03:12:59,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:12:59,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:12:59,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:12:59,333 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:12:59,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:12:59,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:12:59,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:12:59,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 03:12:59,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:12:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:12:59,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:12:59,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:12:59,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-31 03:13:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:00,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670044380] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:00,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:13:00,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 23 [2023-08-31 03:13:00,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097100373] [2023-08-31 03:13:00,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:00,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 03:13:00,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:00,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 03:13:00,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-08-31 03:13:00,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 279 [2023-08-31 03:13:00,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 221 transitions, 2633 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:00,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:00,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 279 [2023-08-31 03:13:00,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:00,576 INFO L130 PetriNetUnfolder]: 1150/2096 cut-off events. [2023-08-31 03:13:00,577 INFO L131 PetriNetUnfolder]: For 23820/23820 co-relation queries the response was YES. [2023-08-31 03:13:00,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13537 conditions, 2096 events. 1150/2096 cut-off events. For 23820/23820 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12057 event pairs, 232 based on Foata normal form. 2/2085 useless extension candidates. Maximal degree in co-relation 13444. Up to 1307 conditions per place. [2023-08-31 03:13:00,587 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 180 selfloop transitions, 83 changer transitions 16/279 dead transitions. [2023-08-31 03:13:00,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 279 transitions, 3776 flow [2023-08-31 03:13:00,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:13:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:13:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1011 transitions. [2023-08-31 03:13:00,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529569892473118 [2023-08-31 03:13:00,589 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1011 transitions. [2023-08-31 03:13:00,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1011 transitions. [2023-08-31 03:13:00,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:00,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1011 transitions. [2023-08-31 03:13:00,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.375) internal successors, (1011), 8 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:00,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:00,592 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:00,592 INFO L175 Difference]: Start difference. First operand has 144 places, 221 transitions, 2633 flow. Second operand 8 states and 1011 transitions. [2023-08-31 03:13:00,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 279 transitions, 3776 flow [2023-08-31 03:13:00,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 279 transitions, 3663 flow, removed 34 selfloop flow, removed 3 redundant places. [2023-08-31 03:13:00,633 INFO L231 Difference]: Finished difference. Result has 150 places, 238 transitions, 3000 flow [2023-08-31 03:13:00,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3000, PETRI_PLACES=150, PETRI_TRANSITIONS=238} [2023-08-31 03:13:00,634 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2023-08-31 03:13:00,634 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 238 transitions, 3000 flow [2023-08-31 03:13:00,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:00,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:00,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:00,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:00,840 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,SelfDestructingSolverStorable10 [2023-08-31 03:13:00,840 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:00,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash -522720116, now seen corresponding path program 11 times [2023-08-31 03:13:00,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:00,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667548358] [2023-08-31 03:13:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:00,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:02,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:02,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667548358] [2023-08-31 03:13:02,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667548358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:02,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758467613] [2023-08-31 03:13:02,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:13:02,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:02,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:02,512 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) [2023-08-31 03:13:02,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:13:02,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:13:02,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-31 03:13:02,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:02,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:13:02,755 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 22 [2023-08-31 03:13:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:13:02,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:03,012 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_553 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_553) c_~queue~0.base))) (or (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) 0)) (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))))) is different from false [2023-08-31 03:13:03,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:13:03,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 110 [2023-08-31 03:13:03,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:13:03,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 52 [2023-08-31 03:13:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:03,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758467613] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:03,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:13:03,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 29 [2023-08-31 03:13:03,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048753458] [2023-08-31 03:13:03,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:03,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 03:13:03,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 03:13:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=781, Unknown=5, NotChecked=56, Total=930 [2023-08-31 03:13:03,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 279 [2023-08-31 03:13:03,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 238 transitions, 3000 flow. Second operand has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:03,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:03,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 279 [2023-08-31 03:13:03,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:07,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:13:07,868 INFO L130 PetriNetUnfolder]: 1231/2263 cut-off events. [2023-08-31 03:13:07,869 INFO L131 PetriNetUnfolder]: For 28500/28500 co-relation queries the response was YES. [2023-08-31 03:13:07,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15262 conditions, 2263 events. 1231/2263 cut-off events. For 28500/28500 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13379 event pairs, 241 based on Foata normal form. 2/2260 useless extension candidates. Maximal degree in co-relation 15163. Up to 1199 conditions per place. [2023-08-31 03:13:07,883 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 193 selfloop transitions, 110 changer transitions 17/320 dead transitions. [2023-08-31 03:13:07,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 320 transitions, 4467 flow [2023-08-31 03:13:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 03:13:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 03:13:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-08-31 03:13:07,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3971326164874552 [2023-08-31 03:13:07,885 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-08-31 03:13:07,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-08-31 03:13:07,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:07,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-08-31 03:13:07,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:07,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 279.0) internal successors, (3069), 11 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:07,889 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 279.0) internal successors, (3069), 11 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:07,889 INFO L175 Difference]: Start difference. First operand has 150 places, 238 transitions, 3000 flow. Second operand 10 states and 1108 transitions. [2023-08-31 03:13:07,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 320 transitions, 4467 flow [2023-08-31 03:13:07,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 320 transitions, 4364 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-08-31 03:13:07,948 INFO L231 Difference]: Finished difference. Result has 159 places, 262 transitions, 3508 flow [2023-08-31 03:13:07,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3508, PETRI_PLACES=159, PETRI_TRANSITIONS=262} [2023-08-31 03:13:07,949 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2023-08-31 03:13:07,949 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 262 transitions, 3508 flow [2023-08-31 03:13:07,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:07,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:07,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:07,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 03:13:08,155 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,SelfDestructingSolverStorable11 [2023-08-31 03:13:08,155 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:08,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:08,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1034387338, now seen corresponding path program 12 times [2023-08-31 03:13:08,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:08,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919124600] [2023-08-31 03:13:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:08,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:08,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:08,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919124600] [2023-08-31 03:13:08,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919124600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:08,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391593205] [2023-08-31 03:13:08,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:13:08,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:08,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:08,739 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) [2023-08-31 03:13:08,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 03:13:08,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-31 03:13:08,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:08,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 03:13:08,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:09,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:13:09,002 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 34 [2023-08-31 03:13:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:09,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:13:09,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391593205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:09,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:13:09,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-08-31 03:13:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124927137] [2023-08-31 03:13:09,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:09,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 03:13:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 03:13:09,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:13:09,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-31 03:13:09,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 262 transitions, 3508 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:09,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:09,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-31 03:13:09,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:09,850 INFO L130 PetriNetUnfolder]: 1247/2307 cut-off events. [2023-08-31 03:13:09,850 INFO L131 PetriNetUnfolder]: For 32785/32785 co-relation queries the response was YES. [2023-08-31 03:13:09,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16766 conditions, 2307 events. 1247/2307 cut-off events. For 32785/32785 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13818 event pairs, 253 based on Foata normal form. 11/2313 useless extension candidates. Maximal degree in co-relation 16665. Up to 1524 conditions per place. [2023-08-31 03:13:09,868 INFO L137 encePairwiseOnDemand]: 270/279 looper letters, 206 selfloop transitions, 73 changer transitions 22/301 dead transitions. [2023-08-31 03:13:09,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 301 transitions, 4528 flow [2023-08-31 03:13:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:13:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:13:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 965 transitions. [2023-08-31 03:13:09,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43234767025089604 [2023-08-31 03:13:09,869 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 965 transitions. [2023-08-31 03:13:09,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 965 transitions. [2023-08-31 03:13:09,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:09,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 965 transitions. [2023-08-31 03:13:09,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:09,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:09,872 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:09,873 INFO L175 Difference]: Start difference. First operand has 159 places, 262 transitions, 3508 flow. Second operand 8 states and 965 transitions. [2023-08-31 03:13:09,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 301 transitions, 4528 flow [2023-08-31 03:13:09,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 301 transitions, 4321 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-08-31 03:13:09,950 INFO L231 Difference]: Finished difference. Result has 162 places, 263 transitions, 3576 flow [2023-08-31 03:13:09,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3291, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3576, PETRI_PLACES=162, PETRI_TRANSITIONS=263} [2023-08-31 03:13:09,951 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2023-08-31 03:13:09,951 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 263 transitions, 3576 flow [2023-08-31 03:13:09,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:09,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:09,952 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:09,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-31 03:13:10,157 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,SelfDestructingSolverStorable12 [2023-08-31 03:13:10,157 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:10,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash -76548866, now seen corresponding path program 13 times [2023-08-31 03:13:10,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:10,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282152138] [2023-08-31 03:13:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:10,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:11,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:11,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282152138] [2023-08-31 03:13:11,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282152138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:11,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528418109] [2023-08-31 03:13:11,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:13:11,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:11,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:11,426 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) [2023-08-31 03:13:11,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 03:13:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:11,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 03:13:11,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:13:11,750 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 03:13:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:11,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:12,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:13:12,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 114 [2023-08-31 03:13:12,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:13:12,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-08-31 03:13:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:12,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528418109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:13:12,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:13:12,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-08-31 03:13:12,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800274631] [2023-08-31 03:13:12,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:13:12,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 03:13:12,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 03:13:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=932, Unknown=1, NotChecked=0, Total=1056 [2023-08-31 03:13:15,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 279 [2023-08-31 03:13:15,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 263 transitions, 3576 flow. Second operand has 33 states, 33 states have (on average 85.9090909090909) internal successors, (2835), 33 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:15,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:15,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 279 [2023-08-31 03:13:15,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:32,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:13:37,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:13:39,860 INFO L130 PetriNetUnfolder]: 1513/2940 cut-off events. [2023-08-31 03:13:39,860 INFO L131 PetriNetUnfolder]: For 42817/42817 co-relation queries the response was YES. [2023-08-31 03:13:39,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20613 conditions, 2940 events. 1513/2940 cut-off events. For 42817/42817 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19649 event pairs, 308 based on Foata normal form. 3/2938 useless extension candidates. Maximal degree in co-relation 20466. Up to 895 conditions per place. [2023-08-31 03:13:39,880 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 321 selfloop transitions, 173 changer transitions 36/530 dead transitions. [2023-08-31 03:13:39,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 530 transitions, 7157 flow [2023-08-31 03:13:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 03:13:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 03:13:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3407 transitions. [2023-08-31 03:13:39,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33003971713649133 [2023-08-31 03:13:39,904 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3407 transitions. [2023-08-31 03:13:39,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3407 transitions. [2023-08-31 03:13:39,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:39,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3407 transitions. [2023-08-31 03:13:39,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 92.08108108108108) internal successors, (3407), 37 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:39,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 279.0) internal successors, (10602), 38 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:39,916 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 279.0) internal successors, (10602), 38 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:39,916 INFO L175 Difference]: Start difference. First operand has 162 places, 263 transitions, 3576 flow. Second operand 37 states and 3407 transitions. [2023-08-31 03:13:39,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 530 transitions, 7157 flow [2023-08-31 03:13:40,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 530 transitions, 6908 flow, removed 71 selfloop flow, removed 6 redundant places. [2023-08-31 03:13:40,032 INFO L231 Difference]: Finished difference. Result has 204 places, 317 transitions, 4744 flow [2023-08-31 03:13:40,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4744, PETRI_PLACES=204, PETRI_TRANSITIONS=317} [2023-08-31 03:13:40,033 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 175 predicate places. [2023-08-31 03:13:40,033 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 317 transitions, 4744 flow [2023-08-31 03:13:40,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.9090909090909) internal successors, (2835), 33 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:40,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:40,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:40,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:40,257 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,SelfDestructingSolverStorable13 [2023-08-31 03:13:40,257 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:40,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:40,258 INFO L85 PathProgramCache]: Analyzing trace with hash 892284170, now seen corresponding path program 14 times [2023-08-31 03:13:40,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:40,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463573683] [2023-08-31 03:13:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:41,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463573683] [2023-08-31 03:13:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463573683] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144999575] [2023-08-31 03:13:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:13:41,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:41,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:41,242 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) [2023-08-31 03:13:41,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 03:13:41,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 03:13:41,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:41,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 03:13:41,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:13:41,441 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 23 [2023-08-31 03:13:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:13:41,479 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 23 [2023-08-31 03:13:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:41,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:13:41,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144999575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:41,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:13:41,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 19 [2023-08-31 03:13:41,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222091614] [2023-08-31 03:13:41,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:41,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 03:13:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 03:13:41,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:13:41,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 279 [2023-08-31 03:13:41,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 317 transitions, 4744 flow. Second operand has 11 states, 11 states have (on average 111.81818181818181) internal successors, (1230), 11 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:41,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:41,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 279 [2023-08-31 03:13:41,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:42,596 INFO L130 PetriNetUnfolder]: 1503/2891 cut-off events. [2023-08-31 03:13:42,596 INFO L131 PetriNetUnfolder]: For 47748/47748 co-relation queries the response was YES. [2023-08-31 03:13:42,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21420 conditions, 2891 events. 1503/2891 cut-off events. For 47748/47748 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18903 event pairs, 295 based on Foata normal form. 14/2905 useless extension candidates. Maximal degree in co-relation 21235. Up to 1931 conditions per place. [2023-08-31 03:13:42,619 INFO L137 encePairwiseOnDemand]: 269/279 looper letters, 258 selfloop transitions, 89 changer transitions 14/361 dead transitions. [2023-08-31 03:13:42,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 361 transitions, 5942 flow [2023-08-31 03:13:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:13:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:13:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 957 transitions. [2023-08-31 03:13:42,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876344086021506 [2023-08-31 03:13:42,621 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 957 transitions. [2023-08-31 03:13:42,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 957 transitions. [2023-08-31 03:13:42,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:42,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 957 transitions. [2023-08-31 03:13:42,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.625) internal successors, (957), 8 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:42,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:42,626 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:42,626 INFO L175 Difference]: Start difference. First operand has 204 places, 317 transitions, 4744 flow. Second operand 8 states and 957 transitions. [2023-08-31 03:13:42,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 361 transitions, 5942 flow [2023-08-31 03:13:42,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 361 transitions, 5773 flow, removed 77 selfloop flow, removed 9 redundant places. [2023-08-31 03:13:42,843 INFO L231 Difference]: Finished difference. Result has 203 places, 321 transitions, 4922 flow [2023-08-31 03:13:42,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=4577, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4922, PETRI_PLACES=203, PETRI_TRANSITIONS=321} [2023-08-31 03:13:42,844 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 174 predicate places. [2023-08-31 03:13:42,844 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 321 transitions, 4922 flow [2023-08-31 03:13:42,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.81818181818181) internal successors, (1230), 11 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:42,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:42,845 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:42,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:43,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:43,051 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:43,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1172192138, now seen corresponding path program 15 times [2023-08-31 03:13:43,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:43,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347593773] [2023-08-31 03:13:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:43,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347593773] [2023-08-31 03:13:44,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347593773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608534681] [2023-08-31 03:13:44,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:13:44,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:44,323 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) [2023-08-31 03:13:44,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 03:13:44,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 03:13:44,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 03:13:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:44,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:13:44,528 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 23 [2023-08-31 03:13:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:13:44,611 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 34 [2023-08-31 03:13:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:44,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:13:44,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608534681] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:44,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:13:44,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 20 [2023-08-31 03:13:44,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142119670] [2023-08-31 03:13:44,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:44,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 03:13:44,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 03:13:44,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:13:44,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 279 [2023-08-31 03:13:44,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 321 transitions, 4922 flow. Second operand has 11 states, 11 states have (on average 111.81818181818181) internal successors, (1230), 11 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:44,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:44,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 279 [2023-08-31 03:13:44,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:45,671 INFO L130 PetriNetUnfolder]: 1497/2884 cut-off events. [2023-08-31 03:13:45,671 INFO L131 PetriNetUnfolder]: For 51098/51098 co-relation queries the response was YES. [2023-08-31 03:13:45,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22117 conditions, 2884 events. 1497/2884 cut-off events. For 51098/51098 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18885 event pairs, 290 based on Foata normal form. 2/2885 useless extension candidates. Maximal degree in co-relation 21964. Up to 1909 conditions per place. [2023-08-31 03:13:45,694 INFO L137 encePairwiseOnDemand]: 270/279 looper letters, 257 selfloop transitions, 83 changer transitions 20/360 dead transitions. [2023-08-31 03:13:45,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 360 transitions, 6044 flow [2023-08-31 03:13:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:13:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:13:45,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 955 transitions. [2023-08-31 03:13:45,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42786738351254483 [2023-08-31 03:13:45,695 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 955 transitions. [2023-08-31 03:13:45,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 955 transitions. [2023-08-31 03:13:45,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:45,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 955 transitions. [2023-08-31 03:13:45,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.375) internal successors, (955), 8 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:45,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:45,714 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:45,715 INFO L175 Difference]: Start difference. First operand has 203 places, 321 transitions, 4922 flow. Second operand 8 states and 955 transitions. [2023-08-31 03:13:45,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 360 transitions, 6044 flow [2023-08-31 03:13:45,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 360 transitions, 5894 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-08-31 03:13:45,957 INFO L231 Difference]: Finished difference. Result has 207 places, 314 transitions, 4850 flow [2023-08-31 03:13:45,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4850, PETRI_PLACES=207, PETRI_TRANSITIONS=314} [2023-08-31 03:13:45,958 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2023-08-31 03:13:45,958 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 314 transitions, 4850 flow [2023-08-31 03:13:45,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.81818181818181) internal successors, (1230), 11 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:45,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:45,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:45,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:46,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 03:13:46,165 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:46,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1038907006, now seen corresponding path program 1 times [2023-08-31 03:13:46,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:46,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392768746] [2023-08-31 03:13:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:46,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:46,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392768746] [2023-08-31 03:13:46,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392768746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:46,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:13:46,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:13:46,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144023729] [2023-08-31 03:13:46,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:46,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:13:46,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:13:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:13:46,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-31 03:13:46,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 314 transitions, 4850 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:46,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:46,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-31 03:13:46,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:46,808 INFO L130 PetriNetUnfolder]: 1534/2891 cut-off events. [2023-08-31 03:13:46,809 INFO L131 PetriNetUnfolder]: For 58182/58182 co-relation queries the response was YES. [2023-08-31 03:13:46,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23110 conditions, 2891 events. 1534/2891 cut-off events. For 58182/58182 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18418 event pairs, 205 based on Foata normal form. 113/3003 useless extension candidates. Maximal degree in co-relation 22963. Up to 1475 conditions per place. [2023-08-31 03:13:46,830 INFO L137 encePairwiseOnDemand]: 273/279 looper letters, 287 selfloop transitions, 99 changer transitions 0/386 dead transitions. [2023-08-31 03:13:46,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 386 transitions, 6556 flow [2023-08-31 03:13:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:13:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:13:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 816 transitions. [2023-08-31 03:13:46,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4874551971326165 [2023-08-31 03:13:46,832 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 816 transitions. [2023-08-31 03:13:46,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 816 transitions. [2023-08-31 03:13:46,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:46,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 816 transitions. [2023-08-31 03:13:46,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:46,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:46,834 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:46,834 INFO L175 Difference]: Start difference. First operand has 207 places, 314 transitions, 4850 flow. Second operand 6 states and 816 transitions. [2023-08-31 03:13:46,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 386 transitions, 6556 flow [2023-08-31 03:13:46,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 386 transitions, 6223 flow, removed 59 selfloop flow, removed 11 redundant places. [2023-08-31 03:13:47,001 INFO L231 Difference]: Finished difference. Result has 199 places, 324 transitions, 5121 flow [2023-08-31 03:13:47,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5121, PETRI_PLACES=199, PETRI_TRANSITIONS=324} [2023-08-31 03:13:47,002 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 170 predicate places. [2023-08-31 03:13:47,002 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 324 transitions, 5121 flow [2023-08-31 03:13:47,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:47,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:47,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:47,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 03:13:47,002 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:47,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:47,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1291287646, now seen corresponding path program 1 times [2023-08-31 03:13:47,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:47,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948555544] [2023-08-31 03:13:47,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:47,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948555544] [2023-08-31 03:13:47,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948555544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:47,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:13:47,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:13:47,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209191304] [2023-08-31 03:13:47,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:47,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:13:47,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:13:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:13:47,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-31 03:13:47,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 324 transitions, 5121 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:47,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:47,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-31 03:13:47,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:47,571 INFO L130 PetriNetUnfolder]: 1219/2364 cut-off events. [2023-08-31 03:13:47,571 INFO L131 PetriNetUnfolder]: For 51889/51889 co-relation queries the response was YES. [2023-08-31 03:13:47,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19163 conditions, 2364 events. 1219/2364 cut-off events. For 51889/51889 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14766 event pairs, 366 based on Foata normal form. 117/2480 useless extension candidates. Maximal degree in co-relation 19011. Up to 1760 conditions per place. [2023-08-31 03:13:47,586 INFO L137 encePairwiseOnDemand]: 274/279 looper letters, 223 selfloop transitions, 61 changer transitions 35/319 dead transitions. [2023-08-31 03:13:47,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 319 transitions, 5406 flow [2023-08-31 03:13:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:13:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:13:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 674 transitions. [2023-08-31 03:13:47,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831541218637993 [2023-08-31 03:13:47,588 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 674 transitions. [2023-08-31 03:13:47,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 674 transitions. [2023-08-31 03:13:47,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:47,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 674 transitions. [2023-08-31 03:13:47,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:47,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:47,590 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:47,590 INFO L175 Difference]: Start difference. First operand has 199 places, 324 transitions, 5121 flow. Second operand 5 states and 674 transitions. [2023-08-31 03:13:47,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 319 transitions, 5406 flow [2023-08-31 03:13:47,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 319 transitions, 5252 flow, removed 40 selfloop flow, removed 2 redundant places. [2023-08-31 03:13:47,717 INFO L231 Difference]: Finished difference. Result has 196 places, 262 transitions, 4021 flow [2023-08-31 03:13:47,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=4269, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4021, PETRI_PLACES=196, PETRI_TRANSITIONS=262} [2023-08-31 03:13:47,718 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 167 predicate places. [2023-08-31 03:13:47,718 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 262 transitions, 4021 flow [2023-08-31 03:13:47,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:47,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:47,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:47,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 03:13:47,719 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:47,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:47,719 INFO L85 PathProgramCache]: Analyzing trace with hash 733401850, now seen corresponding path program 2 times [2023-08-31 03:13:47,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:47,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551694627] [2023-08-31 03:13:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:47,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:47,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:47,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551694627] [2023-08-31 03:13:47,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551694627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:47,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:13:47,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:13:47,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744123141] [2023-08-31 03:13:47,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:47,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:13:47,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:13:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:13:47,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-31 03:13:47,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 262 transitions, 4021 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:47,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:47,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-31 03:13:47,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:48,416 INFO L130 PetriNetUnfolder]: 1260/2360 cut-off events. [2023-08-31 03:13:48,416 INFO L131 PetriNetUnfolder]: For 53837/53837 co-relation queries the response was YES. [2023-08-31 03:13:48,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19318 conditions, 2360 events. 1260/2360 cut-off events. For 53837/53837 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14102 event pairs, 376 based on Foata normal form. 61/2420 useless extension candidates. Maximal degree in co-relation 19248. Up to 1678 conditions per place. [2023-08-31 03:13:48,436 INFO L137 encePairwiseOnDemand]: 274/279 looper letters, 253 selfloop transitions, 67 changer transitions 1/321 dead transitions. [2023-08-31 03:13:48,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 321 transitions, 5292 flow [2023-08-31 03:13:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:13:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:13:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-08-31 03:13:48,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4924731182795699 [2023-08-31 03:13:48,439 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-08-31 03:13:48,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-08-31 03:13:48,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:48,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-08-31 03:13:48,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:48,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:48,442 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:48,442 INFO L175 Difference]: Start difference. First operand has 196 places, 262 transitions, 4021 flow. Second operand 5 states and 687 transitions. [2023-08-31 03:13:48,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 321 transitions, 5292 flow [2023-08-31 03:13:48,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 321 transitions, 5047 flow, removed 45 selfloop flow, removed 12 redundant places. [2023-08-31 03:13:48,598 INFO L231 Difference]: Finished difference. Result has 180 places, 269 transitions, 4079 flow [2023-08-31 03:13:48,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3808, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4079, PETRI_PLACES=180, PETRI_TRANSITIONS=269} [2023-08-31 03:13:48,599 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2023-08-31 03:13:48,599 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 269 transitions, 4079 flow [2023-08-31 03:13:48,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:48,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:48,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:48,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 03:13:48,600 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:48,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1684218422, now seen corresponding path program 3 times [2023-08-31 03:13:48,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:48,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913070644] [2023-08-31 03:13:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:48,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:48,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:48,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913070644] [2023-08-31 03:13:48,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913070644] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:48,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:13:48,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:13:48,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916596111] [2023-08-31 03:13:48,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:48,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:13:48,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:48,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:13:48,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:13:48,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 279 [2023-08-31 03:13:48,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 269 transitions, 4079 flow. Second operand has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:48,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:48,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 279 [2023-08-31 03:13:48,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:49,271 INFO L130 PetriNetUnfolder]: 1181/2209 cut-off events. [2023-08-31 03:13:49,272 INFO L131 PetriNetUnfolder]: For 45813/45813 co-relation queries the response was YES. [2023-08-31 03:13:49,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17555 conditions, 2209 events. 1181/2209 cut-off events. For 45813/45813 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12978 event pairs, 378 based on Foata normal form. 24/2232 useless extension candidates. Maximal degree in co-relation 17492. Up to 1778 conditions per place. [2023-08-31 03:13:49,286 INFO L137 encePairwiseOnDemand]: 273/279 looper letters, 220 selfloop transitions, 62 changer transitions 9/291 dead transitions. [2023-08-31 03:13:49,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 291 transitions, 4717 flow [2023-08-31 03:13:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:13:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:13:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 801 transitions. [2023-08-31 03:13:49,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478494623655914 [2023-08-31 03:13:49,288 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 801 transitions. [2023-08-31 03:13:49,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 801 transitions. [2023-08-31 03:13:49,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:49,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 801 transitions. [2023-08-31 03:13:49,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:49,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:49,290 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 279.0) internal successors, (1953), 7 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:49,290 INFO L175 Difference]: Start difference. First operand has 180 places, 269 transitions, 4079 flow. Second operand 6 states and 801 transitions. [2023-08-31 03:13:49,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 291 transitions, 4717 flow [2023-08-31 03:13:49,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 291 transitions, 4551 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-31 03:13:49,396 INFO L231 Difference]: Finished difference. Result has 179 places, 250 transitions, 3711 flow [2023-08-31 03:13:49,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3711, PETRI_PLACES=179, PETRI_TRANSITIONS=250} [2023-08-31 03:13:49,397 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 150 predicate places. [2023-08-31 03:13:49,397 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 250 transitions, 3711 flow [2023-08-31 03:13:49,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:49,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:49,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:49,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 03:13:49,397 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:49,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:49,398 INFO L85 PathProgramCache]: Analyzing trace with hash 486770582, now seen corresponding path program 4 times [2023-08-31 03:13:49,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:49,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638770403] [2023-08-31 03:13:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:49,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:49,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:49,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638770403] [2023-08-31 03:13:49,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638770403] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:49,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:13:49,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:13:49,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321392019] [2023-08-31 03:13:49,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:49,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:13:49,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:13:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:13:49,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-31 03:13:49,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 250 transitions, 3711 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:49,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:49,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-31 03:13:49,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:49,853 INFO L130 PetriNetUnfolder]: 1245/2301 cut-off events. [2023-08-31 03:13:49,854 INFO L131 PetriNetUnfolder]: For 49045/49045 co-relation queries the response was YES. [2023-08-31 03:13:49,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18166 conditions, 2301 events. 1245/2301 cut-off events. For 49045/49045 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13446 event pairs, 294 based on Foata normal form. 61/2361 useless extension candidates. Maximal degree in co-relation 18103. Up to 1303 conditions per place. [2023-08-31 03:13:49,871 INFO L137 encePairwiseOnDemand]: 274/279 looper letters, 204 selfloop transitions, 90 changer transitions 0/294 dead transitions. [2023-08-31 03:13:49,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 4735 flow [2023-08-31 03:13:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:13:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:13:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 685 transitions. [2023-08-31 03:13:49,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4910394265232975 [2023-08-31 03:13:49,872 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 685 transitions. [2023-08-31 03:13:49,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 685 transitions. [2023-08-31 03:13:49,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:49,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 685 transitions. [2023-08-31 03:13:49,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:49,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:49,874 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:49,874 INFO L175 Difference]: Start difference. First operand has 179 places, 250 transitions, 3711 flow. Second operand 5 states and 685 transitions. [2023-08-31 03:13:49,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 4735 flow [2023-08-31 03:13:49,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 294 transitions, 4542 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-31 03:13:49,993 INFO L231 Difference]: Finished difference. Result has 179 places, 251 transitions, 3806 flow [2023-08-31 03:13:49,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3806, PETRI_PLACES=179, PETRI_TRANSITIONS=251} [2023-08-31 03:13:49,994 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 150 predicate places. [2023-08-31 03:13:49,994 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 251 transitions, 3806 flow [2023-08-31 03:13:49,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:49,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:49,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:49,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 03:13:49,995 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:49,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1354929972, now seen corresponding path program 5 times [2023-08-31 03:13:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:49,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433202382] [2023-08-31 03:13:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:49,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:50,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:50,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433202382] [2023-08-31 03:13:50,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433202382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:50,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:13:50,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:13:50,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177102281] [2023-08-31 03:13:50,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:50,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:13:50,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:13:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:13:50,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 279 [2023-08-31 03:13:50,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 251 transitions, 3806 flow. Second operand has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:50,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:50,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 279 [2023-08-31 03:13:50,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:50,457 INFO L130 PetriNetUnfolder]: 1206/2255 cut-off events. [2023-08-31 03:13:50,457 INFO L131 PetriNetUnfolder]: For 51787/51787 co-relation queries the response was YES. [2023-08-31 03:13:50,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18498 conditions, 2255 events. 1206/2255 cut-off events. For 51787/51787 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13311 event pairs, 292 based on Foata normal form. 27/2281 useless extension candidates. Maximal degree in co-relation 18433. Up to 1303 conditions per place. [2023-08-31 03:13:50,469 INFO L137 encePairwiseOnDemand]: 273/279 looper letters, 183 selfloop transitions, 81 changer transitions 4/268 dead transitions. [2023-08-31 03:13:50,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 268 transitions, 4373 flow [2023-08-31 03:13:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:13:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:13:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2023-08-31 03:13:50,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817204301075269 [2023-08-31 03:13:50,471 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2023-08-31 03:13:50,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2023-08-31 03:13:50,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:50,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2023-08-31 03:13:50,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:50,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:50,473 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:50,473 INFO L175 Difference]: Start difference. First operand has 179 places, 251 transitions, 3806 flow. Second operand 5 states and 672 transitions. [2023-08-31 03:13:50,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 268 transitions, 4373 flow [2023-08-31 03:13:50,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 268 transitions, 4213 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-08-31 03:13:50,567 INFO L231 Difference]: Finished difference. Result has 179 places, 237 transitions, 3535 flow [2023-08-31 03:13:50,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=3417, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3535, PETRI_PLACES=179, PETRI_TRANSITIONS=237} [2023-08-31 03:13:50,567 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 150 predicate places. [2023-08-31 03:13:50,567 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 237 transitions, 3535 flow [2023-08-31 03:13:50,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:50,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:50,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:50,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 03:13:50,568 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:50,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash -965886622, now seen corresponding path program 6 times [2023-08-31 03:13:50,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:50,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572344551] [2023-08-31 03:13:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:50,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:50,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:50,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572344551] [2023-08-31 03:13:50,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572344551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:50,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:13:50,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:13:50,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467197659] [2023-08-31 03:13:50,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:50,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:13:50,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:50,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:13:50,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:13:50,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-31 03:13:50,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 237 transitions, 3535 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:50,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:50,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-31 03:13:50,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:51,037 INFO L130 PetriNetUnfolder]: 1132/2104 cut-off events. [2023-08-31 03:13:51,037 INFO L131 PetriNetUnfolder]: For 43506/43506 co-relation queries the response was YES. [2023-08-31 03:13:51,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16715 conditions, 2104 events. 1132/2104 cut-off events. For 43506/43506 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12132 event pairs, 270 based on Foata normal form. 30/2133 useless extension candidates. Maximal degree in co-relation 16652. Up to 1303 conditions per place. [2023-08-31 03:13:51,053 INFO L137 encePairwiseOnDemand]: 274/279 looper letters, 159 selfloop transitions, 65 changer transitions 17/241 dead transitions. [2023-08-31 03:13:51,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 3901 flow [2023-08-31 03:13:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:13:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:13:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 669 transitions. [2023-08-31 03:13:51,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47956989247311826 [2023-08-31 03:13:51,055 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 669 transitions. [2023-08-31 03:13:51,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 669 transitions. [2023-08-31 03:13:51,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:51,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 669 transitions. [2023-08-31 03:13:51,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:51,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:51,057 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:51,057 INFO L175 Difference]: Start difference. First operand has 179 places, 237 transitions, 3535 flow. Second operand 5 states and 669 transitions. [2023-08-31 03:13:51,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 3901 flow [2023-08-31 03:13:51,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 241 transitions, 3661 flow, removed 11 selfloop flow, removed 10 redundant places. [2023-08-31 03:13:51,135 INFO L231 Difference]: Finished difference. Result has 172 places, 206 transitions, 2863 flow [2023-08-31 03:13:51,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2863, PETRI_PLACES=172, PETRI_TRANSITIONS=206} [2023-08-31 03:13:51,136 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 143 predicate places. [2023-08-31 03:13:51,136 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 206 transitions, 2863 flow [2023-08-31 03:13:51,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:51,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:51,137 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:51,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 03:13:51,137 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:51,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:51,137 INFO L85 PathProgramCache]: Analyzing trace with hash 157372981, now seen corresponding path program 16 times [2023-08-31 03:13:51,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:51,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281877820] [2023-08-31 03:13:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:51,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:53,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:53,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281877820] [2023-08-31 03:13:53,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281877820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:53,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753708273] [2023-08-31 03:13:53,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:13:53,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:53,956 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) [2023-08-31 03:13:53,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 03:13:54,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:13:54,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:54,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 03:13:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:54,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:13:54,268 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 35 [2023-08-31 03:13:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:13:54,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:13:54,520 INFO L321 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-08-31 03:13:54,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 57 [2023-08-31 03:13:54,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:13:54,524 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 7 [2023-08-31 03:13:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:13:54,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753708273] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:54,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:13:54,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 29 [2023-08-31 03:13:54,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439808805] [2023-08-31 03:13:54,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:54,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 03:13:54,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 03:13:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=805, Unknown=1, NotChecked=0, Total=930 [2023-08-31 03:13:54,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 279 [2023-08-31 03:13:54,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 206 transitions, 2863 flow. Second operand has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:54,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:54,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 279 [2023-08-31 03:13:54,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:56,123 INFO L130 PetriNetUnfolder]: 1159/2117 cut-off events. [2023-08-31 03:13:56,123 INFO L131 PetriNetUnfolder]: For 42340/42340 co-relation queries the response was YES. [2023-08-31 03:13:56,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16438 conditions, 2117 events. 1159/2117 cut-off events. For 42340/42340 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12043 event pairs, 146 based on Foata normal form. 1/2117 useless extension candidates. Maximal degree in co-relation 16379. Up to 837 conditions per place. [2023-08-31 03:13:56,134 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 165 selfloop transitions, 94 changer transitions 25/284 dead transitions. [2023-08-31 03:13:56,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 284 transitions, 4060 flow [2023-08-31 03:13:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 03:13:56,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 03:13:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1438 transitions. [2023-08-31 03:13:56,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964709125999449 [2023-08-31 03:13:56,136 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1438 transitions. [2023-08-31 03:13:56,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1438 transitions. [2023-08-31 03:13:56,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:56,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1438 transitions. [2023-08-31 03:13:56,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 110.61538461538461) internal successors, (1438), 13 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:56,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 279.0) internal successors, (3906), 14 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:56,140 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 279.0) internal successors, (3906), 14 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:56,140 INFO L175 Difference]: Start difference. First operand has 172 places, 206 transitions, 2863 flow. Second operand 13 states and 1438 transitions. [2023-08-31 03:13:56,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 284 transitions, 4060 flow [2023-08-31 03:13:56,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 284 transitions, 3808 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-08-31 03:13:56,209 INFO L231 Difference]: Finished difference. Result has 177 places, 209 transitions, 2959 flow [2023-08-31 03:13:56,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2959, PETRI_PLACES=177, PETRI_TRANSITIONS=209} [2023-08-31 03:13:56,210 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 148 predicate places. [2023-08-31 03:13:56,210 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 209 transitions, 2959 flow [2023-08-31 03:13:56,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:56,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:56,211 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:56,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:56,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-31 03:13:56,417 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:56,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2111557311, now seen corresponding path program 17 times [2023-08-31 03:13:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:56,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967657476] [2023-08-31 03:13:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:56,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:13:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:13:58,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:13:58,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967657476] [2023-08-31 03:13:58,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967657476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:13:58,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274287508] [2023-08-31 03:13:58,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:13:58,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:58,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:13:58,248 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) [2023-08-31 03:13:58,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 03:13:58,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:13:58,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:13:58,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 03:13:58,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:13:58,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:13:58,535 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 34 [2023-08-31 03:13:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:13:58,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:13:58,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274287508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:13:58,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:13:58,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-31 03:13:58,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300318040] [2023-08-31 03:13:58,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:13:58,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 03:13:58,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:13:58,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 03:13:58,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:13:58,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-31 03:13:58,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 209 transitions, 2959 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:58,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:13:58,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-31 03:13:58,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:13:59,294 INFO L130 PetriNetUnfolder]: 1144/2077 cut-off events. [2023-08-31 03:13:59,295 INFO L131 PetriNetUnfolder]: For 43376/43376 co-relation queries the response was YES. [2023-08-31 03:13:59,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16278 conditions, 2077 events. 1144/2077 cut-off events. For 43376/43376 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11501 event pairs, 269 based on Foata normal form. 1/2077 useless extension candidates. Maximal degree in co-relation 16217. Up to 1517 conditions per place. [2023-08-31 03:13:59,310 INFO L137 encePairwiseOnDemand]: 270/279 looper letters, 162 selfloop transitions, 55 changer transitions 21/238 dead transitions. [2023-08-31 03:13:59,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 238 transitions, 3661 flow [2023-08-31 03:13:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:13:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:13:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 965 transitions. [2023-08-31 03:13:59,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43234767025089604 [2023-08-31 03:13:59,315 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 965 transitions. [2023-08-31 03:13:59,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 965 transitions. [2023-08-31 03:13:59,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:13:59,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 965 transitions. [2023-08-31 03:13:59,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:59,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:59,343 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:59,343 INFO L175 Difference]: Start difference. First operand has 177 places, 209 transitions, 2959 flow. Second operand 8 states and 965 transitions. [2023-08-31 03:13:59,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 238 transitions, 3661 flow [2023-08-31 03:13:59,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 238 transitions, 3510 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-08-31 03:13:59,418 INFO L231 Difference]: Finished difference. Result has 174 places, 201 transitions, 2811 flow [2023-08-31 03:13:59,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2811, PETRI_PLACES=174, PETRI_TRANSITIONS=201} [2023-08-31 03:13:59,419 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2023-08-31 03:13:59,419 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 201 transitions, 2811 flow [2023-08-31 03:13:59,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:13:59,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:13:59,420 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:13:59,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 03:13:59,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:13:59,625 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:13:59,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:13:59,626 INFO L85 PathProgramCache]: Analyzing trace with hash 506824799, now seen corresponding path program 18 times [2023-08-31 03:13:59,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:13:59,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080403059] [2023-08-31 03:13:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:13:59,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:13:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:14:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:14:02,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:14:02,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080403059] [2023-08-31 03:14:02,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080403059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:14:02,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599124927] [2023-08-31 03:14:02,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:14:02,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:14:02,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:14:02,539 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) [2023-08-31 03:14:02,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 03:14:02,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-31 03:14:02,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:14:02,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 03:14:02,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:14:02,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:14:02,883 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 34 [2023-08-31 03:14:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:14:02,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:14:02,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599124927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:14:02,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:14:02,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-31 03:14:02,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641444267] [2023-08-31 03:14:02,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:14:02,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 03:14:02,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:14:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 03:14:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:14:03,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 279 [2023-08-31 03:14:03,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 201 transitions, 2811 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:03,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:14:03,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 279 [2023-08-31 03:14:03,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:14:03,626 INFO L130 PetriNetUnfolder]: 1131/2022 cut-off events. [2023-08-31 03:14:03,626 INFO L131 PetriNetUnfolder]: For 40101/40101 co-relation queries the response was YES. [2023-08-31 03:14:03,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 2022 events. 1131/2022 cut-off events. For 40101/40101 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10893 event pairs, 264 based on Foata normal form. 1/2022 useless extension candidates. Maximal degree in co-relation 15566. Up to 1469 conditions per place. [2023-08-31 03:14:03,640 INFO L137 encePairwiseOnDemand]: 270/279 looper letters, 155 selfloop transitions, 49 changer transitions 26/230 dead transitions. [2023-08-31 03:14:03,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 230 transitions, 3485 flow [2023-08-31 03:14:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:14:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:14:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 963 transitions. [2023-08-31 03:14:03,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-08-31 03:14:03,642 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 963 transitions. [2023-08-31 03:14:03,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 963 transitions. [2023-08-31 03:14:03,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:14:03,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 963 transitions. [2023-08-31 03:14:03,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.375) internal successors, (963), 8 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:03,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:03,660 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:03,660 INFO L175 Difference]: Start difference. First operand has 174 places, 201 transitions, 2811 flow. Second operand 8 states and 963 transitions. [2023-08-31 03:14:03,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 230 transitions, 3485 flow [2023-08-31 03:14:03,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 230 transitions, 3341 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-08-31 03:14:03,733 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2644 flow [2023-08-31 03:14:03,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2644, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2023-08-31 03:14:03,733 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 140 predicate places. [2023-08-31 03:14:03,733 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2644 flow [2023-08-31 03:14:03,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:03,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:14:03,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:14:03,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-31 03:14:03,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:14:03,939 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:14:03,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:14:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash -518517832, now seen corresponding path program 1 times [2023-08-31 03:14:03,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:14:03,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527393359] [2023-08-31 03:14:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:14:03,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:14:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:14:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:14:05,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:14:05,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527393359] [2023-08-31 03:14:05,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527393359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:14:05,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317637585] [2023-08-31 03:14:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:14:05,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:14:05,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:14:05,067 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:14:05,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 03:14:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:14:05,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-31 03:14:05,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:14:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:14:05,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:14:05,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:14:05,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-08-31 03:14:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:14:06,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317637585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:14:06,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:14:06,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-31 03:14:06,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218649748] [2023-08-31 03:14:06,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:14:06,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 03:14:06,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:14:06,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 03:14:06,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2023-08-31 03:14:08,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 279 [2023-08-31 03:14:08,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 2644 flow. Second operand has 36 states, 36 states have (on average 107.91666666666667) internal successors, (3885), 36 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:14:08,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:14:08,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 279 [2023-08-31 03:14:08,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:14:25,148 WARN L222 SmtUtils]: Spent 14.19s on a formula simplification. DAG size of input: 102 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:14:51,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:14:53,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:14:59,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:15:06,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:15:08,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:15:09,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:15:18,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:15:26,479 WARN L222 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 160 DAG size of output: 125 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:15:28,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:15:30,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:15:32,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:15:34,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:15:47,565 INFO L130 PetriNetUnfolder]: 1844/3259 cut-off events. [2023-08-31 03:15:47,566 INFO L131 PetriNetUnfolder]: For 56123/56123 co-relation queries the response was YES. [2023-08-31 03:15:47,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24495 conditions, 3259 events. 1844/3259 cut-off events. For 56123/56123 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19517 event pairs, 318 based on Foata normal form. 3/3261 useless extension candidates. Maximal degree in co-relation 24434. Up to 947 conditions per place. [2023-08-31 03:15:47,587 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 319 selfloop transitions, 235 changer transitions 34/588 dead transitions. [2023-08-31 03:15:47,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 588 transitions, 8037 flow [2023-08-31 03:15:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-31 03:15:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-31 03:15:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5563 transitions. [2023-08-31 03:15:47,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069197571501719 [2023-08-31 03:15:47,591 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5563 transitions. [2023-08-31 03:15:47,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5563 transitions. [2023-08-31 03:15:47,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:15:47,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5563 transitions. [2023-08-31 03:15:47,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 113.53061224489795) internal successors, (5563), 49 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:47,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 279.0) internal successors, (13950), 50 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:47,606 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 279.0) internal successors, (13950), 50 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:47,606 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2644 flow. Second operand 49 states and 5563 transitions. [2023-08-31 03:15:47,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 588 transitions, 8037 flow [2023-08-31 03:15:47,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 588 transitions, 7519 flow, removed 167 selfloop flow, removed 9 redundant places. [2023-08-31 03:15:47,733 INFO L231 Difference]: Finished difference. Result has 223 places, 355 transitions, 5780 flow [2023-08-31 03:15:47,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=2477, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=5780, PETRI_PLACES=223, PETRI_TRANSITIONS=355} [2023-08-31 03:15:47,733 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 194 predicate places. [2023-08-31 03:15:47,733 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 355 transitions, 5780 flow [2023-08-31 03:15:47,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 107.91666666666667) internal successors, (3885), 36 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:47,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:15:47,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:15:47,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 03:15:47,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:15:47,940 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:15:47,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:15:47,940 INFO L85 PathProgramCache]: Analyzing trace with hash -683698794, now seen corresponding path program 2 times [2023-08-31 03:15:47,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:15:47,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695091438] [2023-08-31 03:15:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:15:47,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:15:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:15:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:48,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:15:48,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695091438] [2023-08-31 03:15:48,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695091438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:15:48,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719595050] [2023-08-31 03:15:48,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:15:48,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:15:48,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:15:48,879 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:15:48,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 03:15:49,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:15:49,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:15:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-31 03:15:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:15:49,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:15:49,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:15:49,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:15:49,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:15:49,565 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-08-31 03:15:49,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 38 [2023-08-31 03:15:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:49,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:15:50,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:15:50,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-08-31 03:15:50,832 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:15:50,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 956 treesize of output 926 [2023-08-31 03:15:50,871 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:15:50,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:15:50,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 321 treesize of output 307 [2023-08-31 03:15:50,916 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:15:50,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:15:50,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 282 [2023-08-31 03:15:51,028 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:15:51,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 233 [2023-08-31 03:15:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:15:54,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719595050] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:15:54,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:15:54,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-31 03:15:54,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128933200] [2023-08-31 03:15:54,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:15:54,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-31 03:15:54,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:15:54,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-31 03:15:54,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1356, Unknown=6, NotChecked=0, Total=1560 [2023-08-31 03:15:55,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-31 03:15:55,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 355 transitions, 5780 flow. Second operand has 40 states, 40 states have (on average 83.725) internal successors, (3349), 40 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:15:55,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:15:55,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-31 03:15:55,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:16:03,607 INFO L130 PetriNetUnfolder]: 1893/3365 cut-off events. [2023-08-31 03:16:03,607 INFO L131 PetriNetUnfolder]: For 63054/63054 co-relation queries the response was YES. [2023-08-31 03:16:03,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27104 conditions, 3365 events. 1893/3365 cut-off events. For 63054/63054 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20488 event pairs, 470 based on Foata normal form. 2/3366 useless extension candidates. Maximal degree in co-relation 27023. Up to 1639 conditions per place. [2023-08-31 03:16:03,632 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 370 selfloop transitions, 119 changer transitions 14/503 dead transitions. [2023-08-31 03:16:03,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 503 transitions, 8004 flow [2023-08-31 03:16:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:16:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:16:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2496 transitions. [2023-08-31 03:16:03,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3195084485407066 [2023-08-31 03:16:03,635 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2496 transitions. [2023-08-31 03:16:03,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2496 transitions. [2023-08-31 03:16:03,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:16:03,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2496 transitions. [2023-08-31 03:16:03,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 89.14285714285714) internal successors, (2496), 28 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:03,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 279.0) internal successors, (8091), 29 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:03,642 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 279.0) internal successors, (8091), 29 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:03,642 INFO L175 Difference]: Start difference. First operand has 223 places, 355 transitions, 5780 flow. Second operand 28 states and 2496 transitions. [2023-08-31 03:16:03,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 503 transitions, 8004 flow [2023-08-31 03:16:03,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 503 transitions, 7267 flow, removed 291 selfloop flow, removed 16 redundant places. [2023-08-31 03:16:03,848 INFO L231 Difference]: Finished difference. Result has 236 places, 373 transitions, 5710 flow [2023-08-31 03:16:03,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=5105, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5710, PETRI_PLACES=236, PETRI_TRANSITIONS=373} [2023-08-31 03:16:03,849 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2023-08-31 03:16:03,849 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 373 transitions, 5710 flow [2023-08-31 03:16:03,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 83.725) internal successors, (3349), 40 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:03,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:16:03,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:16:03,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 03:16:04,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 03:16:04,053 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:16:04,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:16:04,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1658424482, now seen corresponding path program 3 times [2023-08-31 03:16:04,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:16:04,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020942808] [2023-08-31 03:16:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:16:04,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:16:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:16:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:16:05,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:16:05,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020942808] [2023-08-31 03:16:05,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020942808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:16:05,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195409195] [2023-08-31 03:16:05,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:16:05,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:16:05,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:16:05,197 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:16:05,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 03:16:05,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:16:05,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:16:05,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-31 03:16:05,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:16:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:16:05,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:16:05,961 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-31 03:16:05,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 32 [2023-08-31 03:16:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:16:06,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195409195] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:16:06,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:16:06,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2023-08-31 03:16:06,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255773649] [2023-08-31 03:16:06,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:16:06,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 03:16:06,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:16:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 03:16:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2023-08-31 03:16:07,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 279 [2023-08-31 03:16:07,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 373 transitions, 5710 flow. Second operand has 32 states, 32 states have (on average 109.125) internal successors, (3492), 32 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:07,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:16:07,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 279 [2023-08-31 03:16:07,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:16:13,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:16:18,015 INFO L130 PetriNetUnfolder]: 1973/3538 cut-off events. [2023-08-31 03:16:18,015 INFO L131 PetriNetUnfolder]: For 56153/56153 co-relation queries the response was YES. [2023-08-31 03:16:18,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27013 conditions, 3538 events. 1973/3538 cut-off events. For 56153/56153 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 22250 event pairs, 186 based on Foata normal form. 3/3540 useless extension candidates. Maximal degree in co-relation 26932. Up to 805 conditions per place. [2023-08-31 03:16:18,042 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 308 selfloop transitions, 278 changer transitions 28/614 dead transitions. [2023-08-31 03:16:18,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 614 transitions, 9333 flow [2023-08-31 03:16:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-31 03:16:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-31 03:16:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4924 transitions. [2023-08-31 03:16:18,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41043594231891306 [2023-08-31 03:16:18,046 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4924 transitions. [2023-08-31 03:16:18,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4924 transitions. [2023-08-31 03:16:18,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:16:18,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4924 transitions. [2023-08-31 03:16:18,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 114.51162790697674) internal successors, (4924), 43 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:18,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 279.0) internal successors, (12276), 44 states have internal predecessors, (12276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:18,056 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 279.0) internal successors, (12276), 44 states have internal predecessors, (12276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:18,057 INFO L175 Difference]: Start difference. First operand has 236 places, 373 transitions, 5710 flow. Second operand 43 states and 4924 transitions. [2023-08-31 03:16:18,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 614 transitions, 9333 flow [2023-08-31 03:16:18,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 614 transitions, 9133 flow, removed 71 selfloop flow, removed 10 redundant places. [2023-08-31 03:16:18,257 INFO L231 Difference]: Finished difference. Result has 281 places, 420 transitions, 7215 flow [2023-08-31 03:16:18,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=5568, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=7215, PETRI_PLACES=281, PETRI_TRANSITIONS=420} [2023-08-31 03:16:18,257 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 252 predicate places. [2023-08-31 03:16:18,258 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 420 transitions, 7215 flow [2023-08-31 03:16:18,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 109.125) internal successors, (3492), 32 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:18,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:16:18,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:16:18,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-31 03:16:18,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 03:16:18,463 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:16:18,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:16:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1458131552, now seen corresponding path program 4 times [2023-08-31 03:16:18,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:16:18,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561235029] [2023-08-31 03:16:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:16:18,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:16:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:16:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:16:19,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:16:19,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561235029] [2023-08-31 03:16:19,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561235029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:16:19,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114239528] [2023-08-31 03:16:19,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:16:19,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:16:19,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:16:19,832 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:16:19,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 03:16:19,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:16:19,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:16:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-31 03:16:19,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:16:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:16:20,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:16:20,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:16:20,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-31 03:16:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:16:21,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114239528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:16:21,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:16:21,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-31 03:16:21,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029399337] [2023-08-31 03:16:21,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:16:21,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-31 03:16:21,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:16:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-31 03:16:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2023-08-31 03:16:23,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 279 [2023-08-31 03:16:23,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 420 transitions, 7215 flow. Second operand has 37 states, 37 states have (on average 100.86486486486487) internal successors, (3732), 37 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:23,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:16:23,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 279 [2023-08-31 03:16:23,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:16:29,728 INFO L130 PetriNetUnfolder]: 2100/3789 cut-off events. [2023-08-31 03:16:29,728 INFO L131 PetriNetUnfolder]: For 73433/73433 co-relation queries the response was YES. [2023-08-31 03:16:29,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31177 conditions, 3789 events. 2100/3789 cut-off events. For 73433/73433 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24227 event pairs, 321 based on Foata normal form. 3/3791 useless extension candidates. Maximal degree in co-relation 31084. Up to 1105 conditions per place. [2023-08-31 03:16:29,763 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 345 selfloop transitions, 229 changer transitions 25/599 dead transitions. [2023-08-31 03:16:29,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 599 transitions, 10171 flow [2023-08-31 03:16:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 03:16:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 03:16:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3104 transitions. [2023-08-31 03:16:29,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38363613891978743 [2023-08-31 03:16:29,766 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3104 transitions. [2023-08-31 03:16:29,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3104 transitions. [2023-08-31 03:16:29,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:16:29,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3104 transitions. [2023-08-31 03:16:29,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 107.03448275862068) internal successors, (3104), 29 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:29,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 279.0) internal successors, (8370), 30 states have internal predecessors, (8370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:29,806 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 279.0) internal successors, (8370), 30 states have internal predecessors, (8370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:29,806 INFO L175 Difference]: Start difference. First operand has 281 places, 420 transitions, 7215 flow. Second operand 29 states and 3104 transitions. [2023-08-31 03:16:29,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 599 transitions, 10171 flow [2023-08-31 03:16:30,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 599 transitions, 9744 flow, removed 145 selfloop flow, removed 24 redundant places. [2023-08-31 03:16:30,138 INFO L231 Difference]: Finished difference. Result has 291 places, 447 transitions, 8019 flow [2023-08-31 03:16:30,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=6860, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8019, PETRI_PLACES=291, PETRI_TRANSITIONS=447} [2023-08-31 03:16:30,139 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 262 predicate places. [2023-08-31 03:16:30,139 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 447 transitions, 8019 flow [2023-08-31 03:16:30,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 100.86486486486487) internal successors, (3732), 37 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:30,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:16:30,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:16:30,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 03:16:30,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:16:30,346 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:16:30,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:16:30,346 INFO L85 PathProgramCache]: Analyzing trace with hash -509029564, now seen corresponding path program 5 times [2023-08-31 03:16:30,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:16:30,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932814653] [2023-08-31 03:16:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:16:30,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:16:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:16:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:16:31,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:16:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932814653] [2023-08-31 03:16:31,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932814653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:16:31,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406188844] [2023-08-31 03:16:31,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:16:31,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:16:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:16:31,690 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:16:31,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 03:16:31,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:16:31,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:16:31,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-31 03:16:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:16:31,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 03:16:31,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:16:31,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:16:32,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:16:32,219 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 22 [2023-08-31 03:16:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:16:32,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:16:33,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:16:33,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 95 [2023-08-31 03:16:33,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:16:33,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1240 treesize of output 1159 [2023-08-31 03:16:33,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:16:33,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 436 treesize of output 374 [2023-08-31 03:16:33,462 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:16:33,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 356 treesize of output 328 [2023-08-31 03:16:33,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:16:33,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 229 treesize of output 233 [2023-08-31 03:16:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:16:34,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406188844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:16:34,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:16:34,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-31 03:16:34,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546452314] [2023-08-31 03:16:34,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:16:34,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-31 03:16:34,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:16:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-31 03:16:34,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1463, Unknown=12, NotChecked=0, Total=1640 [2023-08-31 03:16:37,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:16:37,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-31 03:16:37,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 447 transitions, 8019 flow. Second operand has 41 states, 41 states have (on average 83.6829268292683) internal successors, (3431), 41 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:16:37,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:16:37,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-31 03:16:37,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:16:46,058 WARN L222 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 83 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:17:06,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:17:08,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:17:13,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:17:17,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:17:18,559 INFO L130 PetriNetUnfolder]: 2589/4595 cut-off events. [2023-08-31 03:17:18,559 INFO L131 PetriNetUnfolder]: For 102588/102588 co-relation queries the response was YES. [2023-08-31 03:17:18,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39417 conditions, 4595 events. 2589/4595 cut-off events. For 102588/102588 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 29992 event pairs, 419 based on Foata normal form. 7/4601 useless extension candidates. Maximal degree in co-relation 39320. Up to 1942 conditions per place. [2023-08-31 03:17:18,602 INFO L137 encePairwiseOnDemand]: 265/279 looper letters, 534 selfloop transitions, 331 changer transitions 49/914 dead transitions. [2023-08-31 03:17:18,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 914 transitions, 16466 flow [2023-08-31 03:17:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-31 03:17:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-31 03:17:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5055 transitions. [2023-08-31 03:17:18,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3178645538577627 [2023-08-31 03:17:18,622 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5055 transitions. [2023-08-31 03:17:18,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5055 transitions. [2023-08-31 03:17:18,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:17:18,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5055 transitions. [2023-08-31 03:17:18,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 88.6842105263158) internal successors, (5055), 57 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:18,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 279.0) internal successors, (16182), 58 states have internal predecessors, (16182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:18,650 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 279.0) internal successors, (16182), 58 states have internal predecessors, (16182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:18,650 INFO L175 Difference]: Start difference. First operand has 291 places, 447 transitions, 8019 flow. Second operand 57 states and 5055 transitions. [2023-08-31 03:17:18,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 914 transitions, 16466 flow [2023-08-31 03:17:19,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 914 transitions, 15863 flow, removed 133 selfloop flow, removed 14 redundant places. [2023-08-31 03:17:19,211 INFO L231 Difference]: Finished difference. Result has 356 places, 608 transitions, 12092 flow [2023-08-31 03:17:19,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=7627, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=12092, PETRI_PLACES=356, PETRI_TRANSITIONS=608} [2023-08-31 03:17:19,212 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 327 predicate places. [2023-08-31 03:17:19,212 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 608 transitions, 12092 flow [2023-08-31 03:17:19,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 83.6829268292683) internal successors, (3431), 41 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:19,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:17:19,213 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:17:19,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 03:17:19,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:17:19,429 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:17:19,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:17:19,429 INFO L85 PathProgramCache]: Analyzing trace with hash 405415062, now seen corresponding path program 6 times [2023-08-31 03:17:19,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:17:19,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807946635] [2023-08-31 03:17:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:17:19,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:17:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:17:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:20,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:17:20,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807946635] [2023-08-31 03:17:20,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807946635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:17:20,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382266698] [2023-08-31 03:17:20,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:17:20,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:17:20,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:17:20,670 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:17:20,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 03:17:20,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:17:20,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:17:20,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 03:17:20,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:17:21,210 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:17:21,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:17:21,212 INFO L350 Elim1Store]: Elim1 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 78 treesize of output 35 [2023-08-31 03:17:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:21,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:17:21,437 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:17:21,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-08-31 03:17:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:22,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382266698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:17:22,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:17:22,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 34 [2023-08-31 03:17:22,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498767768] [2023-08-31 03:17:22,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:17:22,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 03:17:22,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:17:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 03:17:22,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2023-08-31 03:17:25,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 279 [2023-08-31 03:17:25,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 608 transitions, 12092 flow. Second operand has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:25,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:17:25,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 279 [2023-08-31 03:17:25,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:17:31,537 INFO L130 PetriNetUnfolder]: 2671/4698 cut-off events. [2023-08-31 03:17:31,537 INFO L131 PetriNetUnfolder]: For 99606/99606 co-relation queries the response was YES. [2023-08-31 03:17:31,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41260 conditions, 4698 events. 2671/4698 cut-off events. For 99606/99606 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30130 event pairs, 654 based on Foata normal form. 12/4709 useless extension candidates. Maximal degree in co-relation 41139. Up to 2413 conditions per place. [2023-08-31 03:17:31,585 INFO L137 encePairwiseOnDemand]: 267/279 looper letters, 528 selfloop transitions, 146 changer transitions 77/751 dead transitions. [2023-08-31 03:17:31,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 751 transitions, 15112 flow [2023-08-31 03:17:31,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:17:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:17:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2963 transitions. [2023-08-31 03:17:31,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37928827444956476 [2023-08-31 03:17:31,590 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2963 transitions. [2023-08-31 03:17:31,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2963 transitions. [2023-08-31 03:17:31,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:17:31,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2963 transitions. [2023-08-31 03:17:31,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 105.82142857142857) internal successors, (2963), 28 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:31,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 279.0) internal successors, (8091), 29 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:31,597 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 279.0) internal successors, (8091), 29 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:31,597 INFO L175 Difference]: Start difference. First operand has 356 places, 608 transitions, 12092 flow. Second operand 28 states and 2963 transitions. [2023-08-31 03:17:31,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 751 transitions, 15112 flow [2023-08-31 03:17:32,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 751 transitions, 13812 flow, removed 497 selfloop flow, removed 28 redundant places. [2023-08-31 03:17:32,157 INFO L231 Difference]: Finished difference. Result has 354 places, 604 transitions, 11322 flow [2023-08-31 03:17:32,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=10996, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11322, PETRI_PLACES=354, PETRI_TRANSITIONS=604} [2023-08-31 03:17:32,158 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 325 predicate places. [2023-08-31 03:17:32,159 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 604 transitions, 11322 flow [2023-08-31 03:17:32,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 100.91666666666667) internal successors, (3633), 36 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:32,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:17:32,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:17:32,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 03:17:32,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:17:32,365 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:17:32,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:17:32,365 INFO L85 PathProgramCache]: Analyzing trace with hash -12107332, now seen corresponding path program 7 times [2023-08-31 03:17:32,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:17:32,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320505509] [2023-08-31 03:17:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:17:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:17:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:17:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:33,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:17:33,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320505509] [2023-08-31 03:17:33,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320505509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:17:33,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251031769] [2023-08-31 03:17:33,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:17:33,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:17:33,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:17:33,640 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:17:33,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 03:17:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:17:33,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 03:17:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:17:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:34,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:17:34,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:17:34,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-31 03:17:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:35,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251031769] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:17:35,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:17:35,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-31 03:17:35,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473306483] [2023-08-31 03:17:35,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:17:35,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-31 03:17:35,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:17:35,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-31 03:17:35,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1159, Unknown=0, NotChecked=0, Total=1332 [2023-08-31 03:17:37,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 279 [2023-08-31 03:17:37,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 604 transitions, 11322 flow. Second operand has 37 states, 37 states have (on average 100.86486486486487) internal successors, (3732), 37 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:37,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:17:37,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 279 [2023-08-31 03:17:37,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:17:46,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:17:48,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:17:52,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:17:55,753 INFO L130 PetriNetUnfolder]: 3131/5455 cut-off events. [2023-08-31 03:17:55,753 INFO L131 PetriNetUnfolder]: For 99327/99327 co-relation queries the response was YES. [2023-08-31 03:17:55,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45442 conditions, 5455 events. 3131/5455 cut-off events. For 99327/99327 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 35518 event pairs, 480 based on Foata normal form. 6/5460 useless extension candidates. Maximal degree in co-relation 45328. Up to 1458 conditions per place. [2023-08-31 03:17:55,810 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 463 selfloop transitions, 448 changer transitions 58/969 dead transitions. [2023-08-31 03:17:55,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 969 transitions, 17531 flow [2023-08-31 03:17:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-31 03:17:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-31 03:17:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4578 transitions. [2023-08-31 03:17:55,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38159539884971244 [2023-08-31 03:17:55,814 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4578 transitions. [2023-08-31 03:17:55,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4578 transitions. [2023-08-31 03:17:55,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:17:55,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4578 transitions. [2023-08-31 03:17:55,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 106.46511627906976) internal successors, (4578), 43 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:55,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 279.0) internal successors, (12276), 44 states have internal predecessors, (12276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:55,824 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 279.0) internal successors, (12276), 44 states have internal predecessors, (12276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:55,824 INFO L175 Difference]: Start difference. First operand has 354 places, 604 transitions, 11322 flow. Second operand 43 states and 4578 transitions. [2023-08-31 03:17:55,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 969 transitions, 17531 flow [2023-08-31 03:17:56,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 969 transitions, 17058 flow, removed 110 selfloop flow, removed 14 redundant places. [2023-08-31 03:17:56,523 INFO L231 Difference]: Finished difference. Result has 378 places, 735 transitions, 14919 flow [2023-08-31 03:17:56,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=10962, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=14919, PETRI_PLACES=378, PETRI_TRANSITIONS=735} [2023-08-31 03:17:56,524 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 349 predicate places. [2023-08-31 03:17:56,524 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 735 transitions, 14919 flow [2023-08-31 03:17:56,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 100.86486486486487) internal successors, (3732), 37 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:17:56,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:17:56,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:17:56,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-31 03:17:56,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-31 03:17:56,729 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:17:56,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:17:56,730 INFO L85 PathProgramCache]: Analyzing trace with hash -392642214, now seen corresponding path program 8 times [2023-08-31 03:17:56,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:17:56,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667418435] [2023-08-31 03:17:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:17:56,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:17:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:17:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:58,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:17:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667418435] [2023-08-31 03:17:58,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667418435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:17:58,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709277297] [2023-08-31 03:17:58,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:17:58,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:17:58,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:17:58,904 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:17:58,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 03:17:59,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:17:59,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:17:59,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 03:17:59,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:17:59,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:17:59,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:17:59,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:17:59,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:17:59,526 INFO L321 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-31 03:17:59,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2023-08-31 03:17:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:17:59,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:18:00,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:18:00,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-08-31 03:18:00,948 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:18:00,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 956 treesize of output 926 [2023-08-31 03:18:01,065 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:18:01,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 435 treesize of output 421 [2023-08-31 03:18:01,134 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:18:01,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 385 treesize of output 321 [2023-08-31 03:18:01,227 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:18:01,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 233 [2023-08-31 03:18:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:03,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709277297] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:18:03,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:18:03,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-31 03:18:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264022092] [2023-08-31 03:18:03,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:18:03,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-31 03:18:03,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:18:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-31 03:18:03,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1355, Unknown=4, NotChecked=0, Total=1560 [2023-08-31 03:18:06,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-31 03:18:06,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 735 transitions, 14919 flow. Second operand has 40 states, 40 states have (on average 83.575) internal successors, (3343), 40 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:06,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:18:06,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-31 03:18:06,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:18:14,043 INFO L130 PetriNetUnfolder]: 3220/5614 cut-off events. [2023-08-31 03:18:14,044 INFO L131 PetriNetUnfolder]: For 113730/113730 co-relation queries the response was YES. [2023-08-31 03:18:14,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48913 conditions, 5614 events. 3220/5614 cut-off events. For 113730/113730 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 36842 event pairs, 857 based on Foata normal form. 4/5617 useless extension candidates. Maximal degree in co-relation 48785. Up to 2878 conditions per place. [2023-08-31 03:18:14,099 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 697 selfloop transitions, 147 changer transitions 34/878 dead transitions. [2023-08-31 03:18:14,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 878 transitions, 18253 flow [2023-08-31 03:18:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 03:18:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 03:18:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2308 transitions. [2023-08-31 03:18:14,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181692859112214 [2023-08-31 03:18:14,102 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2308 transitions. [2023-08-31 03:18:14,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2308 transitions. [2023-08-31 03:18:14,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:18:14,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2308 transitions. [2023-08-31 03:18:14,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 88.76923076923077) internal successors, (2308), 26 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:14,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 279.0) internal successors, (7533), 27 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:14,108 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 279.0) internal successors, (7533), 27 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:14,108 INFO L175 Difference]: Start difference. First operand has 378 places, 735 transitions, 14919 flow. Second operand 26 states and 2308 transitions. [2023-08-31 03:18:14,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 878 transitions, 18253 flow [2023-08-31 03:18:15,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 878 transitions, 17766 flow, removed 154 selfloop flow, removed 16 redundant places. [2023-08-31 03:18:15,036 INFO L231 Difference]: Finished difference. Result has 387 places, 776 transitions, 15625 flow [2023-08-31 03:18:15,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=14502, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15625, PETRI_PLACES=387, PETRI_TRANSITIONS=776} [2023-08-31 03:18:15,037 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 358 predicate places. [2023-08-31 03:18:15,037 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 776 transitions, 15625 flow [2023-08-31 03:18:15,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 83.575) internal successors, (3343), 40 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:15,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:18:15,038 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:18:15,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-31 03:18:15,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-31 03:18:15,245 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:18:15,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:18:15,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1676611854, now seen corresponding path program 9 times [2023-08-31 03:18:15,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:18:15,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758059956] [2023-08-31 03:18:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:18:15,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:18:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:18:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:16,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:18:16,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758059956] [2023-08-31 03:18:16,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758059956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:18:16,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94970746] [2023-08-31 03:18:16,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:18:16,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:18:16,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:18:16,280 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:18:16,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 03:18:16,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:18:16,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:18:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 03:18:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:18:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:18:16,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:18:16,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:18:16,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-08-31 03:18:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:18:17,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94970746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:18:17,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:18:17,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 26 [2023-08-31 03:18:17,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864578597] [2023-08-31 03:18:17,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:18:17,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:18:17,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:18:17,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:18:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:18:18,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 279 [2023-08-31 03:18:18,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 776 transitions, 15625 flow. Second operand has 28 states, 28 states have (on average 108.10714285714286) internal successors, (3027), 28 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:18,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:18:18,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 279 [2023-08-31 03:18:18,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:18:22,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:18:25,171 INFO L130 PetriNetUnfolder]: 3286/5709 cut-off events. [2023-08-31 03:18:25,171 INFO L131 PetriNetUnfolder]: For 115914/115914 co-relation queries the response was YES. [2023-08-31 03:18:25,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50403 conditions, 5709 events. 3286/5709 cut-off events. For 115914/115914 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 37430 event pairs, 619 based on Foata normal form. 116/5824 useless extension candidates. Maximal degree in co-relation 50272. Up to 1502 conditions per place. [2023-08-31 03:18:25,234 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 525 selfloop transitions, 473 changer transitions 37/1035 dead transitions. [2023-08-31 03:18:25,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1035 transitions, 21198 flow [2023-08-31 03:18:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 03:18:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 03:18:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3965 transitions. [2023-08-31 03:18:25,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40604198668714797 [2023-08-31 03:18:25,239 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3965 transitions. [2023-08-31 03:18:25,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3965 transitions. [2023-08-31 03:18:25,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:18:25,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3965 transitions. [2023-08-31 03:18:25,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 113.28571428571429) internal successors, (3965), 35 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:25,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 279.0) internal successors, (10044), 36 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:25,248 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 279.0) internal successors, (10044), 36 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:25,248 INFO L175 Difference]: Start difference. First operand has 387 places, 776 transitions, 15625 flow. Second operand 35 states and 3965 transitions. [2023-08-31 03:18:25,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1035 transitions, 21198 flow [2023-08-31 03:18:25,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1035 transitions, 20944 flow, removed 86 selfloop flow, removed 12 redundant places. [2023-08-31 03:18:26,003 INFO L231 Difference]: Finished difference. Result has 419 places, 867 transitions, 18887 flow [2023-08-31 03:18:26,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=14906, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18887, PETRI_PLACES=419, PETRI_TRANSITIONS=867} [2023-08-31 03:18:26,005 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 390 predicate places. [2023-08-31 03:18:26,005 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 867 transitions, 18887 flow [2023-08-31 03:18:26,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 108.10714285714286) internal successors, (3027), 28 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:26,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:18:26,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:18:26,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 03:18:26,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-31 03:18:26,211 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:18:26,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:18:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2079306620, now seen corresponding path program 10 times [2023-08-31 03:18:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:18:26,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023651586] [2023-08-31 03:18:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:18:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:18:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:18:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:27,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:18:27,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023651586] [2023-08-31 03:18:27,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023651586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:18:27,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115089710] [2023-08-31 03:18:27,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:18:27,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:18:27,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:18:27,306 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:18:27,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 03:18:27,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:18:27,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:18:27,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 03:18:27,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:18:27,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:18:27,757 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 22 [2023-08-31 03:18:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:27,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:18:28,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:18:28,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 118 [2023-08-31 03:18:28,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:18:28,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 60 [2023-08-31 03:18:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:29,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115089710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:18:29,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:18:29,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-31 03:18:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553951041] [2023-08-31 03:18:29,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:18:29,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-31 03:18:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:18:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-31 03:18:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1264, Unknown=1, NotChecked=0, Total=1406 [2023-08-31 03:18:32,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:18:35,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:18:35,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 279 [2023-08-31 03:18:35,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 867 transitions, 18887 flow. Second operand has 38 states, 38 states have (on average 89.8157894736842) internal successors, (3413), 38 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:35,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:18:35,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 279 [2023-08-31 03:18:35,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:18:38,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:18:43,593 INFO L130 PetriNetUnfolder]: 3345/5922 cut-off events. [2023-08-31 03:18:43,593 INFO L131 PetriNetUnfolder]: For 129664/129664 co-relation queries the response was YES. [2023-08-31 03:18:43,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53527 conditions, 5922 events. 3345/5922 cut-off events. For 129664/129664 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39844 event pairs, 681 based on Foata normal form. 6/5927 useless extension candidates. Maximal degree in co-relation 53386. Up to 1704 conditions per place. [2023-08-31 03:18:43,689 INFO L137 encePairwiseOnDemand]: 266/279 looper letters, 614 selfloop transitions, 436 changer transitions 46/1096 dead transitions. [2023-08-31 03:18:43,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1096 transitions, 23358 flow [2023-08-31 03:18:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 03:18:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 03:18:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3612 transitions. [2023-08-31 03:18:43,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34069043576683644 [2023-08-31 03:18:43,705 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3612 transitions. [2023-08-31 03:18:43,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3612 transitions. [2023-08-31 03:18:43,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:18:43,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3612 transitions. [2023-08-31 03:18:43,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 95.05263157894737) internal successors, (3612), 38 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:43,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 279.0) internal successors, (10881), 39 states have internal predecessors, (10881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:43,717 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 279.0) internal successors, (10881), 39 states have internal predecessors, (10881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:43,717 INFO L175 Difference]: Start difference. First operand has 419 places, 867 transitions, 18887 flow. Second operand 38 states and 3612 transitions. [2023-08-31 03:18:43,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1096 transitions, 23358 flow [2023-08-31 03:18:44,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1096 transitions, 22827 flow, removed 189 selfloop flow, removed 14 redundant places. [2023-08-31 03:18:44,711 INFO L231 Difference]: Finished difference. Result has 453 places, 894 transitions, 20080 flow [2023-08-31 03:18:44,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=18524, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=20080, PETRI_PLACES=453, PETRI_TRANSITIONS=894} [2023-08-31 03:18:44,712 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 424 predicate places. [2023-08-31 03:18:44,712 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 894 transitions, 20080 flow [2023-08-31 03:18:44,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 89.8157894736842) internal successors, (3413), 38 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:44,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:18:44,713 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:18:44,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 03:18:44,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:18:44,918 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:18:44,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:18:44,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1475532456, now seen corresponding path program 11 times [2023-08-31 03:18:44,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:18:44,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865227560] [2023-08-31 03:18:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:18:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:18:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:18:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:45,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:18:45,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865227560] [2023-08-31 03:18:45,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865227560] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:18:45,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023585893] [2023-08-31 03:18:45,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:18:45,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:18:45,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:18:45,951 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:18:45,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 03:18:46,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:18:46,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:18:46,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 03:18:46,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:18:46,453 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-31 03:18:46,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 35 [2023-08-31 03:18:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:46,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:18:46,694 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:18:46,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-08-31 03:18:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:18:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023585893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:18:51,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:18:51,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-31 03:18:51,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766319748] [2023-08-31 03:18:51,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:18:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-31 03:18:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:18:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-31 03:18:51,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2023-08-31 03:18:56,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:18:58,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 279 [2023-08-31 03:18:58,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 894 transitions, 20080 flow. Second operand has 37 states, 37 states have (on average 100.86486486486487) internal successors, (3732), 37 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:18:58,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:18:58,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 279 [2023-08-31 03:18:58,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:19:09,648 WARN L222 SmtUtils]: Spent 10.33s on a formula simplification. DAG size of input: 140 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:19:11,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:19:15,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:19:40,962 WARN L222 SmtUtils]: Spent 24.10s on a formula simplification. DAG size of input: 178 DAG size of output: 133 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:19:52,146 WARN L222 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 134 DAG size of output: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:20:12,373 WARN L222 SmtUtils]: Spent 19.48s on a formula simplification. DAG size of input: 179 DAG size of output: 128 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:20:15,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:20:16,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:20:18,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:20:32,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:20:34,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:20:37,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:20:39,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:20:41,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:21:07,066 WARN L222 SmtUtils]: Spent 7.91s on a formula simplification. DAG size of input: 174 DAG size of output: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:21:21,019 WARN L222 SmtUtils]: Spent 11.75s on a formula simplification. DAG size of input: 164 DAG size of output: 119 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:21:23,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:21:25,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:21:27,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:21:33,789 WARN L222 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 184 DAG size of output: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:21:50,051 WARN L222 SmtUtils]: Spent 12.16s on a formula simplification. DAG size of input: 166 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:22:08,600 WARN L222 SmtUtils]: Spent 13.60s on a formula simplification. DAG size of input: 180 DAG size of output: 122 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:22:10,412 INFO L130 PetriNetUnfolder]: 3756/6584 cut-off events. [2023-08-31 03:22:10,412 INFO L131 PetriNetUnfolder]: For 156612/156612 co-relation queries the response was YES. [2023-08-31 03:22:10,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60693 conditions, 6584 events. 3756/6584 cut-off events. For 156612/156612 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44902 event pairs, 730 based on Foata normal form. 6/6590 useless extension candidates. Maximal degree in co-relation 60540. Up to 2927 conditions per place. [2023-08-31 03:22:10,494 INFO L137 encePairwiseOnDemand]: 262/279 looper letters, 786 selfloop transitions, 307 changer transitions 49/1142 dead transitions. [2023-08-31 03:22:10,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1142 transitions, 25509 flow [2023-08-31 03:22:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 03:22:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 03:22:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3611 transitions. [2023-08-31 03:22:10,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806662449926207 [2023-08-31 03:22:10,497 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3611 transitions. [2023-08-31 03:22:10,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3611 transitions. [2023-08-31 03:22:10,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:22:10,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3611 transitions. [2023-08-31 03:22:10,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 106.20588235294117) internal successors, (3611), 34 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:10,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 279.0) internal successors, (9765), 35 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:10,504 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 279.0) internal successors, (9765), 35 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:10,504 INFO L175 Difference]: Start difference. First operand has 453 places, 894 transitions, 20080 flow. Second operand 34 states and 3611 transitions. [2023-08-31 03:22:10,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1142 transitions, 25509 flow [2023-08-31 03:22:11,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1142 transitions, 25244 flow, removed 43 selfloop flow, removed 23 redundant places. [2023-08-31 03:22:11,687 INFO L231 Difference]: Finished difference. Result has 473 places, 985 transitions, 22829 flow [2023-08-31 03:22:11,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=19857, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=22829, PETRI_PLACES=473, PETRI_TRANSITIONS=985} [2023-08-31 03:22:11,688 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 444 predicate places. [2023-08-31 03:22:11,688 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 985 transitions, 22829 flow [2023-08-31 03:22:11,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 100.86486486486487) internal successors, (3732), 37 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:11,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:22:11,689 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:22:11,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 03:22:11,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-31 03:22:11,893 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:22:11,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:22:11,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1880047428, now seen corresponding path program 12 times [2023-08-31 03:22:11,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:22:11,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460990672] [2023-08-31 03:22:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:22:11,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:22:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:22:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:12,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:22:12,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460990672] [2023-08-31 03:22:12,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460990672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:22:12,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087314939] [2023-08-31 03:22:12,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:22:12,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:22:12,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:22:12,891 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:22:12,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 03:22:13,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 03:22:13,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:22:13,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 03:22:13,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:22:13,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:22:13,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:22:13,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:22:13,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:22:13,592 INFO L321 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-31 03:22:13,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2023-08-31 03:22:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:13,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:22:18,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:22:18,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-08-31 03:22:18,908 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:22:18,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1932 treesize of output 1836 [2023-08-31 03:22:18,946 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:22:18,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:22:18,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 321 treesize of output 307 [2023-08-31 03:22:19,002 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:22:19,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:22:19,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 282 [2023-08-31 03:22:19,120 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:22:19,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 233 [2023-08-31 03:22:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:22:22,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087314939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:22:22,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:22:22,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-31 03:22:22,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721942213] [2023-08-31 03:22:22,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:22:22,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-31 03:22:22,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:22:22,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-31 03:22:22,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1354, Unknown=8, NotChecked=0, Total=1560 [2023-08-31 03:22:24,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:22:29,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:22:33,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:22:35,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:22:38,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:22:41,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:22:44,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:22:47,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:22:51,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:22:51,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 279 [2023-08-31 03:22:51,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 985 transitions, 22829 flow. Second operand has 40 states, 40 states have (on average 83.725) internal successors, (3349), 40 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:22:51,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:22:51,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 279 [2023-08-31 03:22:51,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:23:09,466 INFO L130 PetriNetUnfolder]: 4109/7545 cut-off events. [2023-08-31 03:23:09,467 INFO L131 PetriNetUnfolder]: For 182755/182755 co-relation queries the response was YES. [2023-08-31 03:23:09,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70981 conditions, 7545 events. 4109/7545 cut-off events. For 182755/182755 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 55765 event pairs, 836 based on Foata normal form. 3/7547 useless extension candidates. Maximal degree in co-relation 70818. Up to 2927 conditions per place. [2023-08-31 03:23:09,582 INFO L137 encePairwiseOnDemand]: 268/279 looper letters, 849 selfloop transitions, 299 changer transitions 19/1167 dead transitions. [2023-08-31 03:23:09,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1167 transitions, 28202 flow [2023-08-31 03:23:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 03:23:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 03:23:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1693 transitions. [2023-08-31 03:23:09,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31937370307489155 [2023-08-31 03:23:09,585 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1693 transitions. [2023-08-31 03:23:09,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1693 transitions. [2023-08-31 03:23:09,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:23:09,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1693 transitions. [2023-08-31 03:23:09,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 89.10526315789474) internal successors, (1693), 19 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:09,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 279.0) internal successors, (5580), 20 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:09,591 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 279.0) internal successors, (5580), 20 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:09,591 INFO L175 Difference]: Start difference. First operand has 473 places, 985 transitions, 22829 flow. Second operand 19 states and 1693 transitions. [2023-08-31 03:23:09,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1167 transitions, 28202 flow [2023-08-31 03:23:11,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 1167 transitions, 27699 flow, removed 165 selfloop flow, removed 13 redundant places. [2023-08-31 03:23:11,283 INFO L231 Difference]: Finished difference. Result has 479 places, 1038 transitions, 24807 flow [2023-08-31 03:23:11,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=22362, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=24807, PETRI_PLACES=479, PETRI_TRANSITIONS=1038} [2023-08-31 03:23:11,285 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 450 predicate places. [2023-08-31 03:23:11,285 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1038 transitions, 24807 flow [2023-08-31 03:23:11,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 83.725) internal successors, (3349), 40 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:11,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:23:11,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:23:11,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-31 03:23:11,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-31 03:23:11,493 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:23:11,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:23:11,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1728252062, now seen corresponding path program 13 times [2023-08-31 03:23:11,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:23:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659349029] [2023-08-31 03:23:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:23:11,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:23:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:23:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:15,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:23:15,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659349029] [2023-08-31 03:23:15,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659349029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:23:15,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232683360] [2023-08-31 03:23:15,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:23:15,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:23:15,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:23:15,108 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:23:15,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 03:23:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:23:15,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 03:23:15,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:23:16,802 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-08-31 03:23:16,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 38 [2023-08-31 03:23:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:16,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:23:17,894 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:23:17,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-08-31 03:23:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:23:29,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232683360] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:23:29,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:23:29,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-31 03:23:29,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156458351] [2023-08-31 03:23:29,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:23:29,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 03:23:29,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:23:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 03:23:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1091, Unknown=2, NotChecked=0, Total=1260 [2023-08-31 03:23:35,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:23:41,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:23:45,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:23:45,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 279 [2023-08-31 03:23:45,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1038 transitions, 24807 flow. Second operand has 36 states, 36 states have (on average 106.91666666666667) internal successors, (3849), 36 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:23:45,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:23:45,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 279 [2023-08-31 03:23:45,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:24:02,268 WARN L222 SmtUtils]: Spent 11.08s on a formula simplification. DAG size of input: 108 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:24:16,701 WARN L222 SmtUtils]: Spent 13.47s on a formula simplification. DAG size of input: 128 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:24:19,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:24:21,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:24:24,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:24:27,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:24:31,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:24:40,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:24:44,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:24:47,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:24:49,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:24:52,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 03:25:08,646 WARN L222 SmtUtils]: Spent 15.95s on a formula simplification. DAG size of input: 147 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:25:10,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:25:12,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:25:14,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:25:16,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:25:18,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:25:19,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:25:22,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:25:31,946 WARN L222 SmtUtils]: Spent 8.77s on a formula simplification. DAG size of input: 143 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:25:34,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 03:25:50,187 WARN L222 SmtUtils]: Spent 11.26s on a formula simplification. DAG size of input: 129 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:25:52,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:25:54,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:25:56,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 03:26:22,739 WARN L222 SmtUtils]: Spent 22.21s on a formula simplification. DAG size of input: 143 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15