./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:22:56,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:22:56,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:22:56,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:22:56,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:22:56,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:22:56,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:22:56,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:22:56,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:22:56,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:22:56,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:22:56,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:22:56,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:22:56,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:22:56,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:22:56,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:22:56,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:22:56,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:22:56,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:22:56,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:22:56,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:22:56,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:22:56,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:22:56,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:22:56,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:22:56,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:22:56,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:22:56,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:22:56,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:22:56,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:22:56,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:22:56,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:22:56,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:22:56,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:22:56,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:22:56,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:22:56,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:22:56,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:22:56,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:22:56,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:22:56,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:22:56,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:22:56,916 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:22:56,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:22:56,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:22:56,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:22:56,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:22:56,918 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:22:56,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:22:56,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:22:56,919 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:22:56,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:22:56,919 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:22:56,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:22:56,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:22:56,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:22:56,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:22:56,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:22:56,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:22:56,921 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:22:56,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:22:56,921 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:22:56,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:22:56,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:22:56,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:22:56,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:22:56,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:22:56,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:22:56,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:22:56,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:22:56,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:22:56,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:22:56,923 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:22:56,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:22:56,924 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:22:56,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:22:56,924 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:22:56,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:22:57,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:22:57,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:22:57,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:22:57,261 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:22:57,261 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:22:57,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-30 20:22:58,394 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:22:58,598 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:22:58,598 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-30 20:22:58,604 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0fe504a6/c33ab61be666484189c999e9f0d4d331/FLAGb2c3909c7 [2023-08-30 20:22:58,614 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0fe504a6/c33ab61be666484189c999e9f0d4d331 [2023-08-30 20:22:58,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:22:58,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:22:58,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:22:58,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:22:58,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:22:58,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a204469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58, skipping insertion in model container [2023-08-30 20:22:58,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:22:58,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:22:58,763 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-figure3.wvr.c[2121,2134] [2023-08-30 20:22:58,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:22:58,774 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:22:58,789 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-figure3.wvr.c[2121,2134] [2023-08-30 20:22:58,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:22:58,796 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:22:58,796 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:22:58,801 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:22:58,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58 WrapperNode [2023-08-30 20:22:58,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:22:58,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:22:58,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:22:58,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:22:58,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,840 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-30 20:22:58,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:22:58,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:22:58,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:22:58,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:22:58,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,880 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:22:58,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:22:58,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:22:58,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:22:58,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (1/1) ... [2023-08-30 20:22:58,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:22:58,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:58,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:22:58,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:22:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:22:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:22:58,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:22:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:22:58,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:22:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:22:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:22:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:22:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:22:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:22:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:22:58,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:22:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:22:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:22:58,973 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:22:59,085 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:22:59,087 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:22:59,303 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:22:59,323 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:22:59,324 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 20:22:59,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:22:59 BoogieIcfgContainer [2023-08-30 20:22:59,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:22:59,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:22:59,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:22:59,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:22:59,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:22:58" (1/3) ... [2023-08-30 20:22:59,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df011e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:22:59, skipping insertion in model container [2023-08-30 20:22:59,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:58" (2/3) ... [2023-08-30 20:22:59,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df011e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:22:59, skipping insertion in model container [2023-08-30 20:22:59,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:22:59" (3/3) ... [2023-08-30 20:22:59,333 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-08-30 20:22:59,339 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:22:59,349 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:22:59,350 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:22:59,350 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:22:59,405 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 20:22:59,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2023-08-30 20:22:59,479 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2023-08-30 20:22:59,479 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:22:59,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-30 20:22:59,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2023-08-30 20:22:59,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 72 transitions, 156 flow [2023-08-30 20:22:59,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:22:59,497 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 72 transitions, 156 flow [2023-08-30 20:22:59,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 72 transitions, 156 flow [2023-08-30 20:22:59,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 156 flow [2023-08-30 20:22:59,534 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2023-08-30 20:22:59,534 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:22:59,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 72 events. 6/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-30 20:22:59,536 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-08-30 20:23:01,377 INFO L134 LiptonReduction]: Checked pairs total: 583 [2023-08-30 20:23:01,378 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-30 20:23:01,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:23:01,402 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;@7a991ea3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:23:01,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 20:23:01,408 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 20:23:01,408 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:23:01,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:01,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:01,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:01,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1436261647, now seen corresponding path program 1 times [2023-08-30 20:23:01,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:01,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120948173] [2023-08-30 20:23:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:01,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:01,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:01,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120948173] [2023-08-30 20:23:01,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120948173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:23:01,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:23:01,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:23:01,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871167212] [2023-08-30 20:23:01,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:23:01,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:23:01,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:01,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:23:01,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:23:02,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 151 [2023-08-30 20:23:02,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:02,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 151 [2023-08-30 20:23:02,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:02,077 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-08-30 20:23:02,077 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 20:23:02,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 271 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-08-30 20:23:02,081 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-30 20:23:02,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-08-30 20:23:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:23:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:23:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-08-30 20:23:02,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165562913907285 [2023-08-30 20:23:02,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-08-30 20:23:02,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-08-30 20:23:02,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:02,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-08-30 20:23:02,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,117 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 234 transitions. [2023-08-30 20:23:02,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-08-30 20:23:02,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:23:02,121 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-08-30 20:23:02,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-08-30 20:23:02,128 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-30 20:23:02,128 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-08-30 20:23:02,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:02,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:02,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:23:02,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:02,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1046577200, now seen corresponding path program 1 times [2023-08-30 20:23:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:02,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186051567] [2023-08-30 20:23:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:02,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:02,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186051567] [2023-08-30 20:23:02,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186051567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:23:02,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:23:02,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:23:02,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065387409] [2023-08-30 20:23:02,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:23:02,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:23:02,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:23:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:23:02,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 151 [2023-08-30 20:23:02,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:02,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 151 [2023-08-30 20:23:02,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:02,462 INFO L130 PetriNetUnfolder]: 72/149 cut-off events. [2023-08-30 20:23:02,463 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 20:23:02,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 149 events. 72/149 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 459 event pairs, 24 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 177. Up to 78 conditions per place. [2023-08-30 20:23:02,464 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2023-08-30 20:23:02,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 37 transitions, 178 flow [2023-08-30 20:23:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:23:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:23:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 352 transitions. [2023-08-30 20:23:02,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46622516556291393 [2023-08-30 20:23:02,470 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 352 transitions. [2023-08-30 20:23:02,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 352 transitions. [2023-08-30 20:23:02,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:02,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 352 transitions. [2023-08-30 20:23:02,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,477 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,477 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 352 transitions. [2023-08-30 20:23:02,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 37 transitions, 178 flow [2023-08-30 20:23:02,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:23:02,479 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 74 flow [2023-08-30 20:23:02,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-30 20:23:02,480 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-30 20:23:02,480 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 74 flow [2023-08-30 20:23:02,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:02,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:02,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:23:02,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:02,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1397973902, now seen corresponding path program 2 times [2023-08-30 20:23:02,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:02,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039060025] [2023-08-30 20:23:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:02,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:02,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:02,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039060025] [2023-08-30 20:23:02,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039060025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:02,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776441438] [2023-08-30 20:23:02,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:23:02,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:02,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:02,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:02,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:23:02,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:23:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:02,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:23:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:02,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:02,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776441438] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:02,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:23:02,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-30 20:23:02,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473408522] [2023-08-30 20:23:02,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:23:02,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:23:02,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:02,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:23:02,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 20:23:02,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 151 [2023-08-30 20:23:02,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:02,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 151 [2023-08-30 20:23:02,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:02,955 INFO L130 PetriNetUnfolder]: 72/143 cut-off events. [2023-08-30 20:23:02,956 INFO L131 PetriNetUnfolder]: For 131/135 co-relation queries the response was YES. [2023-08-30 20:23:02,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 143 events. 72/143 cut-off events. For 131/135 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 442 event pairs, 28 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 112. Up to 86 conditions per place. [2023-08-30 20:23:02,957 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2023-08-30 20:23:02,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 188 flow [2023-08-30 20:23:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:23:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:23:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-08-30 20:23:02,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817880794701987 [2023-08-30 20:23:02,959 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-08-30 20:23:02,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-08-30 20:23:02,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:02,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-08-30 20:23:02,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,962 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,962 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 74 flow. Second operand 4 states and 291 transitions. [2023-08-30 20:23:02,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 188 flow [2023-08-30 20:23:02,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 178 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 20:23:02,964 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 93 flow [2023-08-30 20:23:02,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-30 20:23:02,965 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-30 20:23:02,966 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 93 flow [2023-08-30 20:23:02,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:02,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:02,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:02,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 20:23:03,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:03,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:03,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1096485560, now seen corresponding path program 3 times [2023-08-30 20:23:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:03,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275538290] [2023-08-30 20:23:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:03,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:03,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275538290] [2023-08-30 20:23:03,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275538290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:03,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702697978] [2023-08-30 20:23:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:23:03,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:03,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:03,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:03,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:23:03,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:23:03,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:03,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:23:03,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:03,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:03,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702697978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:03,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:03,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-30 20:23:03,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085211815] [2023-08-30 20:23:03,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:03,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:23:03,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:03,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:23:03,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:23:03,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:03,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:03,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:03,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:03,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:03,615 INFO L130 PetriNetUnfolder]: 102/203 cut-off events. [2023-08-30 20:23:03,616 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2023-08-30 20:23:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 203 events. 102/203 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 705 event pairs, 30 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 237. Up to 104 conditions per place. [2023-08-30 20:23:03,618 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 33 selfloop transitions, 11 changer transitions 11/55 dead transitions. [2023-08-30 20:23:03,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 334 flow [2023-08-30 20:23:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:23:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:23:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 487 transitions. [2023-08-30 20:23:03,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607379375591296 [2023-08-30 20:23:03,621 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 487 transitions. [2023-08-30 20:23:03,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 487 transitions. [2023-08-30 20:23:03,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:03,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 487 transitions. [2023-08-30 20:23:03,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.57142857142857) internal successors, (487), 7 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:03,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:03,625 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:03,625 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 93 flow. Second operand 7 states and 487 transitions. [2023-08-30 20:23:03,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 334 flow [2023-08-30 20:23:03,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:23:03,628 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 165 flow [2023-08-30 20:23:03,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-30 20:23:03,629 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-08-30 20:23:03,629 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 165 flow [2023-08-30 20:23:03,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:03,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:03,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:03,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 20:23:03,835 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,SelfDestructingSolverStorable3 [2023-08-30 20:23:03,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:03,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -39967956, now seen corresponding path program 4 times [2023-08-30 20:23:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:03,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291400467] [2023-08-30 20:23:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:03,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:03,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:03,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291400467] [2023-08-30 20:23:03,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291400467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:03,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417053189] [2023-08-30 20:23:03,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:23:03,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:03,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:03,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:03,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:23:03,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:23:03,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:03,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:23:03,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:04,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:04,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417053189] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:04,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:04,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 20:23:04,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287116848] [2023-08-30 20:23:04,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:04,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:23:04,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:23:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:23:04,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:04,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 64.5) internal successors, (516), 8 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:04,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:04,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:04,213 INFO L130 PetriNetUnfolder]: 96/189 cut-off events. [2023-08-30 20:23:04,214 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2023-08-30 20:23:04,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 189 events. 96/189 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 629 event pairs, 28 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 486. Up to 96 conditions per place. [2023-08-30 20:23:04,217 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 25 selfloop transitions, 11 changer transitions 7/43 dead transitions. [2023-08-30 20:23:04,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 312 flow [2023-08-30 20:23:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:23:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:23:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 348 transitions. [2023-08-30 20:23:04,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609271523178808 [2023-08-30 20:23:04,219 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 348 transitions. [2023-08-30 20:23:04,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 348 transitions. [2023-08-30 20:23:04,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:04,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 348 transitions. [2023-08-30 20:23:04,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.6) internal successors, (348), 5 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,222 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,222 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 165 flow. Second operand 5 states and 348 transitions. [2023-08-30 20:23:04,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 312 flow [2023-08-30 20:23:04,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 298 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 20:23:04,228 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 179 flow [2023-08-30 20:23:04,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-30 20:23:04,230 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-30 20:23:04,230 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 179 flow [2023-08-30 20:23:04,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 64.5) internal successors, (516), 8 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:04,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:04,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:04,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:04,437 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:04,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash -323427280, now seen corresponding path program 1 times [2023-08-30 20:23:04,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:04,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686741207] [2023-08-30 20:23:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:04,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:04,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:04,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686741207] [2023-08-30 20:23:04,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686741207] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:04,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141782899] [2023-08-30 20:23:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:04,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:04,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:04,630 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:04,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:23:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:04,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 20:23:04,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:04,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:04,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141782899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:04,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:04,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2023-08-30 20:23:04,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607947532] [2023-08-30 20:23:04,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:04,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 20:23:04,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:04,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 20:23:04,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 20:23:04,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 151 [2023-08-30 20:23:04,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:04,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 151 [2023-08-30 20:23:04,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:04,899 INFO L130 PetriNetUnfolder]: 122/237 cut-off events. [2023-08-30 20:23:04,899 INFO L131 PetriNetUnfolder]: For 493/512 co-relation queries the response was YES. [2023-08-30 20:23:04,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 237 events. 122/237 cut-off events. For 493/512 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 861 event pairs, 20 based on Foata normal form. 19/247 useless extension candidates. Maximal degree in co-relation 670. Up to 111 conditions per place. [2023-08-30 20:23:04,901 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-08-30 20:23:04,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 374 flow [2023-08-30 20:23:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:23:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:23:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 307 transitions. [2023-08-30 20:23:04,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082781456953642 [2023-08-30 20:23:04,904 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 307 transitions. [2023-08-30 20:23:04,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 307 transitions. [2023-08-30 20:23:04,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:04,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 307 transitions. [2023-08-30 20:23:04,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,907 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,907 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 179 flow. Second operand 4 states and 307 transitions. [2023-08-30 20:23:04,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 374 flow [2023-08-30 20:23:04,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 331 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 20:23:04,910 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 254 flow [2023-08-30 20:23:04,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-30 20:23:04,913 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-30 20:23:04,913 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 254 flow [2023-08-30 20:23:04,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:04,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:04,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:05,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:05,123 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:05,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:05,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1179339409, now seen corresponding path program 2 times [2023-08-30 20:23:05,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:05,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795996265] [2023-08-30 20:23:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:05,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:05,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:05,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795996265] [2023-08-30 20:23:05,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795996265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:05,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562706043] [2023-08-30 20:23:05,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:23:05,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:05,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:05,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:05,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:23:05,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:23:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:05,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:05,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:05,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562706043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:05,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:05,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-30 20:23:05,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399969370] [2023-08-30 20:23:05,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:23:05,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:05,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:23:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:23:05,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:05,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 254 flow. Second operand has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 12 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:05,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:05,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:05,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:05,909 INFO L130 PetriNetUnfolder]: 265/503 cut-off events. [2023-08-30 20:23:05,909 INFO L131 PetriNetUnfolder]: For 1086/1086 co-relation queries the response was YES. [2023-08-30 20:23:05,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 503 events. 265/503 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2160 event pairs, 41 based on Foata normal form. 12/515 useless extension candidates. Maximal degree in co-relation 1607. Up to 185 conditions per place. [2023-08-30 20:23:05,914 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 68 selfloop transitions, 20 changer transitions 7/95 dead transitions. [2023-08-30 20:23:05,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 95 transitions, 738 flow [2023-08-30 20:23:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:23:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:23:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 696 transitions. [2023-08-30 20:23:05,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609271523178808 [2023-08-30 20:23:05,917 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 696 transitions. [2023-08-30 20:23:05,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 696 transitions. [2023-08-30 20:23:05,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:05,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 696 transitions. [2023-08-30 20:23:05,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 69.6) internal successors, (696), 10 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:05,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 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) [2023-08-30 20:23:05,922 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 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) [2023-08-30 20:23:05,922 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 254 flow. Second operand 10 states and 696 transitions. [2023-08-30 20:23:05,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 95 transitions, 738 flow [2023-08-30 20:23:05,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 720 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 20:23:05,927 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 448 flow [2023-08-30 20:23:05,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-08-30 20:23:05,929 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-30 20:23:05,930 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 448 flow [2023-08-30 20:23:05,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 12 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:05,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:05,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:05,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:06,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:06,138 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:06,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1524658179, now seen corresponding path program 3 times [2023-08-30 20:23:06,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:06,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149848569] [2023-08-30 20:23:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:06,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:06,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149848569] [2023-08-30 20:23:06,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149848569] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:06,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346599830] [2023-08-30 20:23:06,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:23:06,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:06,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:06,319 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:06,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:23:06,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:23:06,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:06,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:06,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:06,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:06,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346599830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:06,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:06,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 20:23:06,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269109921] [2023-08-30 20:23:06,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:06,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:23:06,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:23:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:23:06,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:06,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 448 flow. Second operand has 14 states, 14 states have (on average 64.21428571428571) internal successors, (899), 14 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:06,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:06,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:06,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:07,202 INFO L130 PetriNetUnfolder]: 335/629 cut-off events. [2023-08-30 20:23:07,203 INFO L131 PetriNetUnfolder]: For 2648/2648 co-relation queries the response was YES. [2023-08-30 20:23:07,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 629 events. 335/629 cut-off events. For 2648/2648 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2877 event pairs, 45 based on Foata normal form. 38/667 useless extension candidates. Maximal degree in co-relation 2424. Up to 209 conditions per place. [2023-08-30 20:23:07,208 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 90 selfloop transitions, 40 changer transitions 10/140 dead transitions. [2023-08-30 20:23:07,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 140 transitions, 1179 flow [2023-08-30 20:23:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:23:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:23:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1241 transitions. [2023-08-30 20:23:07,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565857247976453 [2023-08-30 20:23:07,212 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1241 transitions. [2023-08-30 20:23:07,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1241 transitions. [2023-08-30 20:23:07,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:07,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1241 transitions. [2023-08-30 20:23:07,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 68.94444444444444) internal successors, (1241), 18 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:07,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:07,219 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:07,220 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 448 flow. Second operand 18 states and 1241 transitions. [2023-08-30 20:23:07,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 140 transitions, 1179 flow [2023-08-30 20:23:07,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 140 transitions, 1104 flow, removed 34 selfloop flow, removed 2 redundant places. [2023-08-30 20:23:07,228 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 725 flow [2023-08-30 20:23:07,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=725, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-08-30 20:23:07,228 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-08-30 20:23:07,229 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 725 flow [2023-08-30 20:23:07,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 64.21428571428571) internal successors, (899), 14 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:07,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:07,229 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:07,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:07,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:07,435 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:07,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1900702783, now seen corresponding path program 4 times [2023-08-30 20:23:07,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019507597] [2023-08-30 20:23:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:07,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:07,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019507597] [2023-08-30 20:23:07,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019507597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:07,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342711078] [2023-08-30 20:23:07,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:23:07,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:07,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:07,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:07,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:23:07,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:23:07,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:07,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:07,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:07,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:07,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342711078] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:07,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:07,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 20:23:07,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822094518] [2023-08-30 20:23:07,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:07,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:23:07,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:23:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:23:07,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:07,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 725 flow. Second operand has 14 states, 14 states have (on average 63.92857142857143) internal successors, (895), 14 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:07,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:07,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:07,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:08,742 INFO L130 PetriNetUnfolder]: 469/939 cut-off events. [2023-08-30 20:23:08,743 INFO L131 PetriNetUnfolder]: For 8851/8851 co-relation queries the response was YES. [2023-08-30 20:23:08,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5444 conditions, 939 events. 469/939 cut-off events. For 8851/8851 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5117 event pairs, 10 based on Foata normal form. 16/955 useless extension candidates. Maximal degree in co-relation 4818. Up to 293 conditions per place. [2023-08-30 20:23:08,751 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 121 selfloop transitions, 91 changer transitions 44/256 dead transitions. [2023-08-30 20:23:08,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 256 transitions, 2777 flow [2023-08-30 20:23:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 20:23:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 20:23:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2174 transitions. [2023-08-30 20:23:08,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44991721854304634 [2023-08-30 20:23:08,757 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2174 transitions. [2023-08-30 20:23:08,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2174 transitions. [2023-08-30 20:23:08,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:08,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2174 transitions. [2023-08-30 20:23:08,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 67.9375) internal successors, (2174), 32 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:08,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 151.0) internal successors, (4983), 33 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:08,770 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 151.0) internal successors, (4983), 33 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:08,770 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 725 flow. Second operand 32 states and 2174 transitions. [2023-08-30 20:23:08,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 256 transitions, 2777 flow [2023-08-30 20:23:08,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 256 transitions, 2456 flow, removed 124 selfloop flow, removed 8 redundant places. [2023-08-30 20:23:08,802 INFO L231 Difference]: Finished difference. Result has 108 places, 127 transitions, 1544 flow [2023-08-30 20:23:08,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1544, PETRI_PLACES=108, PETRI_TRANSITIONS=127} [2023-08-30 20:23:08,803 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-08-30 20:23:08,803 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 127 transitions, 1544 flow [2023-08-30 20:23:08,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.92857142857143) internal successors, (895), 14 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:08,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:08,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:08,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:09,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:09,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:09,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1874186445, now seen corresponding path program 5 times [2023-08-30 20:23:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:09,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196922405] [2023-08-30 20:23:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:09,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:09,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196922405] [2023-08-30 20:23:09,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196922405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:09,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670727688] [2023-08-30 20:23:09,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:23:09,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:09,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:09,147 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:09,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:23:09,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:23:09,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:09,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:09,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:09,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:09,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670727688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:09,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:09,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 20:23:09,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143269944] [2023-08-30 20:23:09,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:09,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:23:09,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:09,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:23:09,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:23:09,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:09,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 127 transitions, 1544 flow. Second operand has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:09,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:09,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:09,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:09,972 INFO L130 PetriNetUnfolder]: 405/798 cut-off events. [2023-08-30 20:23:09,972 INFO L131 PetriNetUnfolder]: For 13818/13818 co-relation queries the response was YES. [2023-08-30 20:23:09,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5309 conditions, 798 events. 405/798 cut-off events. For 13818/13818 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4112 event pairs, 32 based on Foata normal form. 24/822 useless extension candidates. Maximal degree in co-relation 4674. Up to 221 conditions per place. [2023-08-30 20:23:09,980 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 103 selfloop transitions, 86 changer transitions 3/192 dead transitions. [2023-08-30 20:23:09,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 2332 flow [2023-08-30 20:23:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 20:23:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 20:23:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1358 transitions. [2023-08-30 20:23:09,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44966887417218543 [2023-08-30 20:23:09,986 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1358 transitions. [2023-08-30 20:23:09,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1358 transitions. [2023-08-30 20:23:09,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:09,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1358 transitions. [2023-08-30 20:23:09,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.9) internal successors, (1358), 20 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:09,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:09,995 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:09,996 INFO L175 Difference]: Start difference. First operand has 108 places, 127 transitions, 1544 flow. Second operand 20 states and 1358 transitions. [2023-08-30 20:23:09,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 2332 flow [2023-08-30 20:23:10,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 192 transitions, 1998 flow, removed 134 selfloop flow, removed 6 redundant places. [2023-08-30 20:23:10,084 INFO L231 Difference]: Finished difference. Result has 120 places, 126 transitions, 1491 flow [2023-08-30 20:23:10,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1491, PETRI_PLACES=120, PETRI_TRANSITIONS=126} [2023-08-30 20:23:10,085 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-08-30 20:23:10,086 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 126 transitions, 1491 flow [2023-08-30 20:23:10,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:10,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:10,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:10,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:10,291 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,SelfDestructingSolverStorable9 [2023-08-30 20:23:10,292 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:10,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1455539503, now seen corresponding path program 6 times [2023-08-30 20:23:10,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:10,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811935838] [2023-08-30 20:23:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:10,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:10,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:10,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811935838] [2023-08-30 20:23:10,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811935838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:10,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249903979] [2023-08-30 20:23:10,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:23:10,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:10,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:10,422 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:10,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:23:10,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:23:10,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:10,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:10,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249903979] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:10,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 20:23:10,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632491385] [2023-08-30 20:23:10,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:10,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:23:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:23:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:23:10,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:10,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 126 transitions, 1491 flow. Second operand has 15 states, 15 states have (on average 64.06666666666666) internal successors, (961), 15 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:10,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:10,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:10,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:11,578 INFO L130 PetriNetUnfolder]: 649/1264 cut-off events. [2023-08-30 20:23:11,578 INFO L131 PetriNetUnfolder]: For 32066/32066 co-relation queries the response was YES. [2023-08-30 20:23:11,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8728 conditions, 1264 events. 649/1264 cut-off events. For 32066/32066 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7386 event pairs, 138 based on Foata normal form. 88/1352 useless extension candidates. Maximal degree in co-relation 8056. Up to 686 conditions per place. [2023-08-30 20:23:11,591 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 179 selfloop transitions, 124 changer transitions 2/305 dead transitions. [2023-08-30 20:23:11,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 305 transitions, 3898 flow [2023-08-30 20:23:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 20:23:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 20:23:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1643 transitions. [2023-08-30 20:23:11,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533664459161148 [2023-08-30 20:23:11,594 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1643 transitions. [2023-08-30 20:23:11,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1643 transitions. [2023-08-30 20:23:11,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:11,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1643 transitions. [2023-08-30 20:23:11,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 68.45833333333333) internal successors, (1643), 24 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:11,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:11,603 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:11,603 INFO L175 Difference]: Start difference. First operand has 120 places, 126 transitions, 1491 flow. Second operand 24 states and 1643 transitions. [2023-08-30 20:23:11,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 305 transitions, 3898 flow [2023-08-30 20:23:11,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 305 transitions, 3711 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-08-30 20:23:11,653 INFO L231 Difference]: Finished difference. Result has 139 places, 200 transitions, 2926 flow [2023-08-30 20:23:11,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2926, PETRI_PLACES=139, PETRI_TRANSITIONS=200} [2023-08-30 20:23:11,654 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-08-30 20:23:11,654 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 200 transitions, 2926 flow [2023-08-30 20:23:11,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.06666666666666) internal successors, (961), 15 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:11,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:11,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:11,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:11,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:11,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:11,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:11,861 INFO L85 PathProgramCache]: Analyzing trace with hash 862096835, now seen corresponding path program 7 times [2023-08-30 20:23:11,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:11,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788856765] [2023-08-30 20:23:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:11,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:11,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:11,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788856765] [2023-08-30 20:23:11,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788856765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:11,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107042674] [2023-08-30 20:23:11,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:23:11,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:11,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:11,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:12,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:23:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:12,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:12,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:12,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:12,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107042674] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:12,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:12,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 20:23:12,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207312548] [2023-08-30 20:23:12,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:12,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:23:12,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:23:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:23:12,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:12,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 200 transitions, 2926 flow. Second operand has 14 states, 14 states have (on average 63.857142857142854) internal successors, (894), 14 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:12,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:12,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:12,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:12,984 INFO L130 PetriNetUnfolder]: 759/1518 cut-off events. [2023-08-30 20:23:12,984 INFO L131 PetriNetUnfolder]: For 52704/52704 co-relation queries the response was YES. [2023-08-30 20:23:13,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12732 conditions, 1518 events. 759/1518 cut-off events. For 52704/52704 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9435 event pairs, 61 based on Foata normal form. 16/1534 useless extension candidates. Maximal degree in co-relation 11351. Up to 501 conditions per place. [2023-08-30 20:23:13,027 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 142 selfloop transitions, 163 changer transitions 6/311 dead transitions. [2023-08-30 20:23:13,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 311 transitions, 5135 flow [2023-08-30 20:23:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:23:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:23:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1482 transitions. [2023-08-30 20:23:13,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461167971101746 [2023-08-30 20:23:13,030 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1482 transitions. [2023-08-30 20:23:13,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1482 transitions. [2023-08-30 20:23:13,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:13,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1482 transitions. [2023-08-30 20:23:13,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.36363636363636) internal successors, (1482), 22 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:13,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 151.0) internal successors, (3473), 23 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:13,037 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 151.0) internal successors, (3473), 23 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:13,038 INFO L175 Difference]: Start difference. First operand has 139 places, 200 transitions, 2926 flow. Second operand 22 states and 1482 transitions. [2023-08-30 20:23:13,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 311 transitions, 5135 flow [2023-08-30 20:23:13,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 311 transitions, 4534 flow, removed 276 selfloop flow, removed 6 redundant places. [2023-08-30 20:23:13,163 INFO L231 Difference]: Finished difference. Result has 163 places, 242 transitions, 3757 flow [2023-08-30 20:23:13,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3757, PETRI_PLACES=163, PETRI_TRANSITIONS=242} [2023-08-30 20:23:13,164 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-08-30 20:23:13,164 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 242 transitions, 3757 flow [2023-08-30 20:23:13,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.857142857142854) internal successors, (894), 14 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:13,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:13,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:13,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:13,377 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,SelfDestructingSolverStorable11 [2023-08-30 20:23:13,377 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:13,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash 860907543, now seen corresponding path program 8 times [2023-08-30 20:23:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:13,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775995241] [2023-08-30 20:23:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:13,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775995241] [2023-08-30 20:23:13,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775995241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997926126] [2023-08-30 20:23:13,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:23:13,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:13,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:13,497 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) [2023-08-30 20:23:13,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:23:13,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:23:13,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:13,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:13,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:13,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:13,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997926126] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:13,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:13,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 20:23:13,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530757175] [2023-08-30 20:23:13,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:13,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:23:13,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:13,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:23:13,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:23:13,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:13,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 242 transitions, 3757 flow. Second operand has 15 states, 15 states have (on average 63.8) internal successors, (957), 15 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) [2023-08-30 20:23:13,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:13,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:13,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:14,457 INFO L130 PetriNetUnfolder]: 729/1444 cut-off events. [2023-08-30 20:23:14,457 INFO L131 PetriNetUnfolder]: For 68928/68928 co-relation queries the response was YES. [2023-08-30 20:23:14,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12559 conditions, 1444 events. 729/1444 cut-off events. For 68928/68928 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8778 event pairs, 155 based on Foata normal form. 24/1468 useless extension candidates. Maximal degree in co-relation 11185. Up to 681 conditions per place. [2023-08-30 20:23:14,482 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 127 selfloop transitions, 143 changer transitions 3/273 dead transitions. [2023-08-30 20:23:14,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 4407 flow [2023-08-30 20:23:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:23:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:23:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 883 transitions. [2023-08-30 20:23:14,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44982170147733064 [2023-08-30 20:23:14,485 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 883 transitions. [2023-08-30 20:23:14,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 883 transitions. [2023-08-30 20:23:14,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:14,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 883 transitions. [2023-08-30 20:23:14,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.92307692307692) internal successors, (883), 13 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:14,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:14,491 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:14,491 INFO L175 Difference]: Start difference. First operand has 163 places, 242 transitions, 3757 flow. Second operand 13 states and 883 transitions. [2023-08-30 20:23:14,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 4407 flow [2023-08-30 20:23:14,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 273 transitions, 4211 flow, removed 94 selfloop flow, removed 3 redundant places. [2023-08-30 20:23:14,657 INFO L231 Difference]: Finished difference. Result has 173 places, 237 transitions, 3869 flow [2023-08-30 20:23:14,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3869, PETRI_PLACES=173, PETRI_TRANSITIONS=237} [2023-08-30 20:23:14,658 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-08-30 20:23:14,659 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 237 transitions, 3869 flow [2023-08-30 20:23:14,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.8) internal successors, (957), 15 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) [2023-08-30 20:23:14,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:14,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:14,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:14,865 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,SelfDestructingSolverStorable12 [2023-08-30 20:23:14,866 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:14,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1477455475, now seen corresponding path program 9 times [2023-08-30 20:23:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:14,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043647528] [2023-08-30 20:23:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:14,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:15,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:15,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043647528] [2023-08-30 20:23:15,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043647528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:15,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120627716] [2023-08-30 20:23:15,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:23:15,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:15,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:15,102 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) [2023-08-30 20:23:15,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:23:15,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:23:15,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:15,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 20:23:15,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:15,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:15,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120627716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:15,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:15,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 20:23:15,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342295571] [2023-08-30 20:23:15,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:15,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:23:15,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:15,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:23:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:23:15,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 151 [2023-08-30 20:23:15,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 237 transitions, 3869 flow. Second operand has 19 states, 19 states have (on average 60.26315789473684) internal successors, (1145), 19 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:15,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:15,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 151 [2023-08-30 20:23:15,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:16,456 INFO L130 PetriNetUnfolder]: 879/1788 cut-off events. [2023-08-30 20:23:16,456 INFO L131 PetriNetUnfolder]: For 96941/96952 co-relation queries the response was YES. [2023-08-30 20:23:16,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16877 conditions, 1788 events. 879/1788 cut-off events. For 96941/96952 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 11793 event pairs, 120 based on Foata normal form. 82/1870 useless extension candidates. Maximal degree in co-relation 15717. Up to 900 conditions per place. [2023-08-30 20:23:16,478 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 196 selfloop transitions, 89 changer transitions 61/352 dead transitions. [2023-08-30 20:23:16,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 352 transitions, 6317 flow [2023-08-30 20:23:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:23:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:23:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 655 transitions. [2023-08-30 20:23:16,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337748344370861 [2023-08-30 20:23:16,480 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 655 transitions. [2023-08-30 20:23:16,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 655 transitions. [2023-08-30 20:23:16,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:16,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 655 transitions. [2023-08-30 20:23:16,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 65.5) internal successors, (655), 10 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:16,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 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) [2023-08-30 20:23:16,484 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 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) [2023-08-30 20:23:16,484 INFO L175 Difference]: Start difference. First operand has 173 places, 237 transitions, 3869 flow. Second operand 10 states and 655 transitions. [2023-08-30 20:23:16,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 352 transitions, 6317 flow [2023-08-30 20:23:16,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 352 transitions, 6029 flow, removed 20 selfloop flow, removed 15 redundant places. [2023-08-30 20:23:16,672 INFO L231 Difference]: Finished difference. Result has 170 places, 247 transitions, 4397 flow [2023-08-30 20:23:16,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4397, PETRI_PLACES=170, PETRI_TRANSITIONS=247} [2023-08-30 20:23:16,673 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 150 predicate places. [2023-08-30 20:23:16,673 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 247 transitions, 4397 flow [2023-08-30 20:23:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.26315789473684) internal successors, (1145), 19 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:16,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:16,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:16,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 20:23:16,874 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,SelfDestructingSolverStorable13 [2023-08-30 20:23:16,875 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:16,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:16,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2063184372, now seen corresponding path program 10 times [2023-08-30 20:23:16,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:16,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443648550] [2023-08-30 20:23:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:16,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:17,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:17,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443648550] [2023-08-30 20:23:17,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443648550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:17,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708009685] [2023-08-30 20:23:17,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:23:17,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:17,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:17,047 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) [2023-08-30 20:23:17,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:23:17,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:23:17,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:17,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:23:17,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:17,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:17,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708009685] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:17,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:17,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 20:23:17,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423943900] [2023-08-30 20:23:17,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:17,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:23:17,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:23:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:23:17,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:17,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 247 transitions, 4397 flow. Second operand has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:17,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:17,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:17,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:18,540 INFO L130 PetriNetUnfolder]: 1647/3340 cut-off events. [2023-08-30 20:23:18,540 INFO L131 PetriNetUnfolder]: For 174080/174080 co-relation queries the response was YES. [2023-08-30 20:23:18,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31526 conditions, 3340 events. 1647/3340 cut-off events. For 174080/174080 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24487 event pairs, 203 based on Foata normal form. 68/3408 useless extension candidates. Maximal degree in co-relation 27779. Up to 1261 conditions per place. [2023-08-30 20:23:18,577 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 450 selfloop transitions, 146 changer transitions 2/598 dead transitions. [2023-08-30 20:23:18,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 598 transitions, 11388 flow [2023-08-30 20:23:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:23:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:23:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1172 transitions. [2023-08-30 20:23:18,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565640825866771 [2023-08-30 20:23:18,580 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1172 transitions. [2023-08-30 20:23:18,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1172 transitions. [2023-08-30 20:23:18,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:18,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1172 transitions. [2023-08-30 20:23:18,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 68.94117647058823) internal successors, (1172), 17 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:18,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 151.0) internal successors, (2718), 18 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:18,586 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 151.0) internal successors, (2718), 18 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:18,586 INFO L175 Difference]: Start difference. First operand has 170 places, 247 transitions, 4397 flow. Second operand 17 states and 1172 transitions. [2023-08-30 20:23:18,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 598 transitions, 11388 flow [2023-08-30 20:23:18,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 598 transitions, 11113 flow, removed 119 selfloop flow, removed 7 redundant places. [2023-08-30 20:23:18,805 INFO L231 Difference]: Finished difference. Result has 179 places, 361 transitions, 7164 flow [2023-08-30 20:23:18,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7164, PETRI_PLACES=179, PETRI_TRANSITIONS=361} [2023-08-30 20:23:18,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2023-08-30 20:23:18,806 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 361 transitions, 7164 flow [2023-08-30 20:23:18,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:18,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:18,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:18,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:19,012 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,SelfDestructingSolverStorable14 [2023-08-30 20:23:19,012 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:19,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash -475875398, now seen corresponding path program 11 times [2023-08-30 20:23:19,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:19,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024269128] [2023-08-30 20:23:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:19,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:19,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:19,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024269128] [2023-08-30 20:23:19,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024269128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:19,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181058486] [2023-08-30 20:23:19,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:23:19,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:19,177 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) [2023-08-30 20:23:19,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:23:19,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:23:19,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:23:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:19,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:19,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181058486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:19,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:19,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 20:23:19,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109783846] [2023-08-30 20:23:19,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:19,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:23:19,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:19,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:23:19,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:23:19,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:19,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 361 transitions, 7164 flow. Second operand has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:19,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:19,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:19,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:21,367 INFO L130 PetriNetUnfolder]: 1772/3571 cut-off events. [2023-08-30 20:23:21,368 INFO L131 PetriNetUnfolder]: For 183020/183020 co-relation queries the response was YES. [2023-08-30 20:23:21,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34885 conditions, 3571 events. 1772/3571 cut-off events. For 183020/183020 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26445 event pairs, 231 based on Foata normal form. 58/3629 useless extension candidates. Maximal degree in co-relation 31693. Up to 1314 conditions per place. [2023-08-30 20:23:21,417 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 513 selfloop transitions, 195 changer transitions 2/710 dead transitions. [2023-08-30 20:23:21,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 710 transitions, 13680 flow [2023-08-30 20:23:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 20:23:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 20:23:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2386 transitions. [2023-08-30 20:23:21,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146641438032165 [2023-08-30 20:23:21,423 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2386 transitions. [2023-08-30 20:23:21,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2386 transitions. [2023-08-30 20:23:21,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:21,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2386 transitions. [2023-08-30 20:23:21,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 68.17142857142858) internal successors, (2386), 35 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:21,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:21,434 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:21,434 INFO L175 Difference]: Start difference. First operand has 179 places, 361 transitions, 7164 flow. Second operand 35 states and 2386 transitions. [2023-08-30 20:23:21,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 710 transitions, 13680 flow [2023-08-30 20:23:21,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 710 transitions, 12959 flow, removed 328 selfloop flow, removed 5 redundant places. [2023-08-30 20:23:21,831 INFO L231 Difference]: Finished difference. Result has 219 places, 426 transitions, 8638 flow [2023-08-30 20:23:21,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8638, PETRI_PLACES=219, PETRI_TRANSITIONS=426} [2023-08-30 20:23:21,832 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-08-30 20:23:21,832 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 426 transitions, 8638 flow [2023-08-30 20:23:21,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:21,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:21,833 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:21,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:22,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:22,034 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:22,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:22,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1140862416, now seen corresponding path program 12 times [2023-08-30 20:23:22,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:22,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155069470] [2023-08-30 20:23:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:22,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:22,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:22,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155069470] [2023-08-30 20:23:22,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155069470] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:22,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904793019] [2023-08-30 20:23:22,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:23:22,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:22,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:22,269 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) [2023-08-30 20:23:22,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:23:22,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 20:23:22,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:22,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:23:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:22,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:22,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904793019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:22,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:22,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-08-30 20:23:22,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071201551] [2023-08-30 20:23:22,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:22,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:23:22,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:22,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:23:22,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:23:22,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:22,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 426 transitions, 8638 flow. Second operand has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:22,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:22,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:22,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:25,712 INFO L130 PetriNetUnfolder]: 2172/4396 cut-off events. [2023-08-30 20:23:25,713 INFO L131 PetriNetUnfolder]: For 281276/281276 co-relation queries the response was YES. [2023-08-30 20:23:25,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46183 conditions, 4396 events. 2172/4396 cut-off events. For 281276/281276 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34209 event pairs, 80 based on Foata normal form. 38/4434 useless extension candidates. Maximal degree in co-relation 45755. Up to 1393 conditions per place. [2023-08-30 20:23:25,757 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 301 selfloop transitions, 579 changer transitions 32/912 dead transitions. [2023-08-30 20:23:25,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 912 transitions, 19241 flow [2023-08-30 20:23:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-30 20:23:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-30 20:23:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4048 transitions. [2023-08-30 20:23:25,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4467991169977925 [2023-08-30 20:23:25,798 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4048 transitions. [2023-08-30 20:23:25,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4048 transitions. [2023-08-30 20:23:25,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:25,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4048 transitions. [2023-08-30 20:23:25,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 67.46666666666667) internal successors, (4048), 60 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:25,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 151.0) internal successors, (9211), 61 states have internal predecessors, (9211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:25,828 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 151.0) internal successors, (9211), 61 states have internal predecessors, (9211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:25,829 INFO L175 Difference]: Start difference. First operand has 219 places, 426 transitions, 8638 flow. Second operand 60 states and 4048 transitions. [2023-08-30 20:23:25,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 912 transitions, 19241 flow [2023-08-30 20:23:26,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 912 transitions, 18425 flow, removed 353 selfloop flow, removed 10 redundant places. [2023-08-30 20:23:26,551 INFO L231 Difference]: Finished difference. Result has 285 places, 676 transitions, 15440 flow [2023-08-30 20:23:26,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=8043, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=15440, PETRI_PLACES=285, PETRI_TRANSITIONS=676} [2023-08-30 20:23:26,552 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 265 predicate places. [2023-08-30 20:23:26,552 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 676 transitions, 15440 flow [2023-08-30 20:23:26,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:26,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:26,553 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:26,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-30 20:23:26,753 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,SelfDestructingSolverStorable16 [2023-08-30 20:23:26,753 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:26,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:26,754 INFO L85 PathProgramCache]: Analyzing trace with hash 270066790, now seen corresponding path program 13 times [2023-08-30 20:23:26,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:26,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945451185] [2023-08-30 20:23:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:26,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:26,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:26,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945451185] [2023-08-30 20:23:26,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945451185] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:26,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49338722] [2023-08-30 20:23:26,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:23:26,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:26,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:26,913 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) [2023-08-30 20:23:26,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:23:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:26,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:23:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:27,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:27,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49338722] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:27,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:27,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 20:23:27,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888365399] [2023-08-30 20:23:27,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:27,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:23:27,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:27,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:23:27,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:23:27,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:27,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 676 transitions, 15440 flow. Second operand has 17 states, 17 states have (on average 63.76470588235294) internal successors, (1084), 17 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:27,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:27,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:27,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:30,023 INFO L130 PetriNetUnfolder]: 2312/4614 cut-off events. [2023-08-30 20:23:30,024 INFO L131 PetriNetUnfolder]: For 486549/486549 co-relation queries the response was YES. [2023-08-30 20:23:30,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54379 conditions, 4614 events. 2312/4614 cut-off events. For 486549/486549 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 35739 event pairs, 229 based on Foata normal form. 90/4704 useless extension candidates. Maximal degree in co-relation 53799. Up to 1654 conditions per place. [2023-08-30 20:23:30,076 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 569 selfloop transitions, 324 changer transitions 20/913 dead transitions. [2023-08-30 20:23:30,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 913 transitions, 21042 flow [2023-08-30 20:23:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 20:23:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 20:23:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2383 transitions. [2023-08-30 20:23:30,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508987701040681 [2023-08-30 20:23:30,081 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2383 transitions. [2023-08-30 20:23:30,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2383 transitions. [2023-08-30 20:23:30,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:30,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2383 transitions. [2023-08-30 20:23:30,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 68.08571428571429) internal successors, (2383), 35 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:30,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:30,090 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:30,090 INFO L175 Difference]: Start difference. First operand has 285 places, 676 transitions, 15440 flow. Second operand 35 states and 2383 transitions. [2023-08-30 20:23:30,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 913 transitions, 21042 flow [2023-08-30 20:23:31,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 913 transitions, 18678 flow, removed 1059 selfloop flow, removed 17 redundant places. [2023-08-30 20:23:31,746 INFO L231 Difference]: Finished difference. Result has 307 places, 734 transitions, 15851 flow [2023-08-30 20:23:31,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=13381, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15851, PETRI_PLACES=307, PETRI_TRANSITIONS=734} [2023-08-30 20:23:31,747 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 287 predicate places. [2023-08-30 20:23:31,747 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 734 transitions, 15851 flow [2023-08-30 20:23:31,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 63.76470588235294) internal successors, (1084), 17 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:31,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:31,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:31,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:31,953 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,SelfDestructingSolverStorable17 [2023-08-30 20:23:31,953 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:31,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1139673124, now seen corresponding path program 14 times [2023-08-30 20:23:31,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:31,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568087181] [2023-08-30 20:23:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:31,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:32,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:32,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568087181] [2023-08-30 20:23:32,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568087181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:32,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772961047] [2023-08-30 20:23:32,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:23:32,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:32,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:32,185 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) [2023-08-30 20:23:32,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:23:32,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:23:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:23:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:32,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:32,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772961047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:32,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:32,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-08-30 20:23:32,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471105861] [2023-08-30 20:23:32,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:32,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 20:23:32,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:32,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 20:23:32,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-08-30 20:23:32,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:32,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 734 transitions, 15851 flow. Second operand has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:32,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:32,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:32,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:35,409 INFO L130 PetriNetUnfolder]: 2324/4664 cut-off events. [2023-08-30 20:23:35,409 INFO L131 PetriNetUnfolder]: For 560320/560320 co-relation queries the response was YES. [2023-08-30 20:23:35,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54453 conditions, 4664 events. 2324/4664 cut-off events. For 560320/560320 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 36423 event pairs, 172 based on Foata normal form. 72/4736 useless extension candidates. Maximal degree in co-relation 53939. Up to 1105 conditions per place. [2023-08-30 20:23:35,457 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 374 selfloop transitions, 541 changer transitions 3/918 dead transitions. [2023-08-30 20:23:35,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 918 transitions, 20073 flow [2023-08-30 20:23:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 20:23:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 20:23:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2992 transitions. [2023-08-30 20:23:35,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503311258278146 [2023-08-30 20:23:35,462 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2992 transitions. [2023-08-30 20:23:35,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2992 transitions. [2023-08-30 20:23:35,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:35,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2992 transitions. [2023-08-30 20:23:35,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 68.0) internal successors, (2992), 44 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:35,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:35,473 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:35,473 INFO L175 Difference]: Start difference. First operand has 307 places, 734 transitions, 15851 flow. Second operand 44 states and 2992 transitions. [2023-08-30 20:23:35,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 918 transitions, 20073 flow [2023-08-30 20:23:37,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 918 transitions, 19432 flow, removed 223 selfloop flow, removed 17 redundant places. [2023-08-30 20:23:37,165 INFO L231 Difference]: Finished difference. Result has 343 places, 742 transitions, 16941 flow [2023-08-30 20:23:37,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=15020, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16941, PETRI_PLACES=343, PETRI_TRANSITIONS=742} [2023-08-30 20:23:37,166 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 323 predicate places. [2023-08-30 20:23:37,166 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 742 transitions, 16941 flow [2023-08-30 20:23:37,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:37,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:37,166 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:37,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:37,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:37,367 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:37,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:37,367 INFO L85 PathProgramCache]: Analyzing trace with hash -452021610, now seen corresponding path program 15 times [2023-08-30 20:23:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:37,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841299663] [2023-08-30 20:23:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:37,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:37,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:37,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841299663] [2023-08-30 20:23:37,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841299663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:37,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310678604] [2023-08-30 20:23:37,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:23:37,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:37,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:37,507 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) [2023-08-30 20:23:37,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 20:23:37,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 20:23:37,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:37,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:23:37,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:37,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:37,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310678604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:37,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-30 20:23:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649534357] [2023-08-30 20:23:37,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:37,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:23:37,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:23:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:23:37,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:37,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 742 transitions, 16941 flow. Second operand has 18 states, 18 states have (on average 63.72222222222222) internal successors, (1147), 18 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:37,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:37,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:37,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:41,258 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 [] [2023-08-30 20:23:43,416 INFO L130 PetriNetUnfolder]: 2789/5587 cut-off events. [2023-08-30 20:23:43,416 INFO L131 PetriNetUnfolder]: For 841141/841141 co-relation queries the response was YES. [2023-08-30 20:23:43,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69341 conditions, 5587 events. 2789/5587 cut-off events. For 841141/841141 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45175 event pairs, 696 based on Foata normal form. 90/5677 useless extension candidates. Maximal degree in co-relation 68655. Up to 3278 conditions per place. [2023-08-30 20:23:43,469 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 615 selfloop transitions, 410 changer transitions 24/1049 dead transitions. [2023-08-30 20:23:43,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1049 transitions, 25028 flow [2023-08-30 20:23:43,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 20:23:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 20:23:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2762 transitions. [2023-08-30 20:23:43,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461314811823615 [2023-08-30 20:23:43,474 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2762 transitions. [2023-08-30 20:23:43,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2762 transitions. [2023-08-30 20:23:43,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:43,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2762 transitions. [2023-08-30 20:23:43,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 67.36585365853658) internal successors, (2762), 41 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:43,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:43,484 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:43,484 INFO L175 Difference]: Start difference. First operand has 343 places, 742 transitions, 16941 flow. Second operand 41 states and 2762 transitions. [2023-08-30 20:23:43,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1049 transitions, 25028 flow [2023-08-30 20:23:45,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1049 transitions, 24238 flow, removed 117 selfloop flow, removed 32 redundant places. [2023-08-30 20:23:45,789 INFO L231 Difference]: Finished difference. Result has 364 places, 865 transitions, 21360 flow [2023-08-30 20:23:45,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=16275, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=21360, PETRI_PLACES=364, PETRI_TRANSITIONS=865} [2023-08-30 20:23:45,790 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 344 predicate places. [2023-08-30 20:23:45,791 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 865 transitions, 21360 flow [2023-08-30 20:23:45,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.72222222222222) internal successors, (1147), 18 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:45,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:45,791 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:45,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:45,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:45,997 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:45,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:45,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1486062540, now seen corresponding path program 16 times [2023-08-30 20:23:45,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:45,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21263096] [2023-08-30 20:23:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:45,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:46,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:46,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21263096] [2023-08-30 20:23:46,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21263096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:46,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633039698] [2023-08-30 20:23:46,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:23:46,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:46,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:46,129 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) [2023-08-30 20:23:46,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 20:23:46,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:23:46,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:46,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:23:46,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:46,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:46,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633039698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:46,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:46,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 20:23:46,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78222231] [2023-08-30 20:23:46,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:46,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:23:46,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:46,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:23:46,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:23:46,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:46,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 865 transitions, 21360 flow. Second operand has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:46,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:46,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:46,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:49,731 INFO L130 PetriNetUnfolder]: 3178/6320 cut-off events. [2023-08-30 20:23:49,731 INFO L131 PetriNetUnfolder]: For 1055485/1055485 co-relation queries the response was YES. [2023-08-30 20:23:49,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82781 conditions, 6320 events. 3178/6320 cut-off events. For 1055485/1055485 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 51918 event pairs, 976 based on Foata normal form. 58/6378 useless extension candidates. Maximal degree in co-relation 81829. Up to 4281 conditions per place. [2023-08-30 20:23:49,812 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 854 selfloop transitions, 312 changer transitions 4/1170 dead transitions. [2023-08-30 20:23:49,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1170 transitions, 28762 flow [2023-08-30 20:23:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 20:23:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 20:23:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2652 transitions. [2023-08-30 20:23:49,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503311258278146 [2023-08-30 20:23:49,817 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2652 transitions. [2023-08-30 20:23:49,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2652 transitions. [2023-08-30 20:23:49,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:49,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2652 transitions. [2023-08-30 20:23:49,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 68.0) internal successors, (2652), 39 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:49,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:49,829 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:49,829 INFO L175 Difference]: Start difference. First operand has 364 places, 865 transitions, 21360 flow. Second operand 39 states and 2652 transitions. [2023-08-30 20:23:49,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1170 transitions, 28762 flow [2023-08-30 20:23:53,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1170 transitions, 28239 flow, removed 202 selfloop flow, removed 19 redundant places. [2023-08-30 20:23:53,107 INFO L231 Difference]: Finished difference. Result has 395 places, 969 transitions, 24660 flow [2023-08-30 20:23:53,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=20847, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24660, PETRI_PLACES=395, PETRI_TRANSITIONS=969} [2023-08-30 20:23:53,108 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2023-08-30 20:23:53,109 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 969 transitions, 24660 flow [2023-08-30 20:23:53,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:53,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:53,109 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:53,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:53,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:53,309 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:53,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:53,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1267300304, now seen corresponding path program 17 times [2023-08-30 20:23:53,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:53,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467939226] [2023-08-30 20:23:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:53,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:53,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:53,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467939226] [2023-08-30 20:23:53,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467939226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:53,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965284098] [2023-08-30 20:23:53,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:23:53,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:53,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:53,441 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) [2023-08-30 20:23:53,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 20:23:53,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:23:53,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:53,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:23:53,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:53,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:53,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965284098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:53,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:53,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 20:23:53,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132251929] [2023-08-30 20:23:53,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:53,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:23:53,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:53,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:23:53,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:23:53,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:23:53,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 969 transitions, 24660 flow. Second operand has 17 states, 17 states have (on average 63.8235294117647) internal successors, (1085), 17 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:53,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:53,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:23:53,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:57,639 INFO L130 PetriNetUnfolder]: 3456/6883 cut-off events. [2023-08-30 20:23:57,639 INFO L131 PetriNetUnfolder]: For 1265975/1265975 co-relation queries the response was YES. [2023-08-30 20:23:57,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93386 conditions, 6883 events. 3456/6883 cut-off events. For 1265975/1265975 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 57290 event pairs, 1244 based on Foata normal form. 56/6939 useless extension candidates. Maximal degree in co-relation 92435. Up to 5461 conditions per place. [2023-08-30 20:23:57,731 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 915 selfloop transitions, 244 changer transitions 24/1183 dead transitions. [2023-08-30 20:23:57,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1183 transitions, 30799 flow [2023-08-30 20:23:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 20:23:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 20:23:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1840 transitions. [2023-08-30 20:23:57,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513122393917096 [2023-08-30 20:23:57,734 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1840 transitions. [2023-08-30 20:23:57,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1840 transitions. [2023-08-30 20:23:57,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:57,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1840 transitions. [2023-08-30 20:23:57,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 68.14814814814815) internal successors, (1840), 27 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:57,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 151.0) internal successors, (4228), 28 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:57,741 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 151.0) internal successors, (4228), 28 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:57,741 INFO L175 Difference]: Start difference. First operand has 395 places, 969 transitions, 24660 flow. Second operand 27 states and 1840 transitions. [2023-08-30 20:23:57,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1183 transitions, 30799 flow [2023-08-30 20:24:02,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1183 transitions, 30022 flow, removed 345 selfloop flow, removed 11 redundant places. [2023-08-30 20:24:02,291 INFO L231 Difference]: Finished difference. Result has 420 places, 1030 transitions, 26451 flow [2023-08-30 20:24:02,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=23839, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=26451, PETRI_PLACES=420, PETRI_TRANSITIONS=1030} [2023-08-30 20:24:02,292 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 400 predicate places. [2023-08-30 20:24:02,292 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1030 transitions, 26451 flow [2023-08-30 20:24:02,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 63.8235294117647) internal successors, (1085), 17 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:02,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:24:02,293 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:24:02,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 20:24:02,498 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,SelfDestructingSolverStorable21 [2023-08-30 20:24:02,498 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:24:02,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:24:02,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2075125822, now seen corresponding path program 18 times [2023-08-30 20:24:02,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:24:02,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552872459] [2023-08-30 20:24:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:24:02,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:24:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:24:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:02,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:24:02,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552872459] [2023-08-30 20:24:02,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552872459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:24:02,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360177509] [2023-08-30 20:24:02,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:24:02,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:24:02,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:24:02,625 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) [2023-08-30 20:24:02,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 20:24:02,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:24:02,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:24:02,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:24:02,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:24:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:02,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:24:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:02,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360177509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:24:02,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:24:02,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 20:24:02,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194947421] [2023-08-30 20:24:02,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:24:02,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:24:02,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:24:02,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:24:02,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:24:02,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:24:02,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1030 transitions, 26451 flow. Second operand has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:02,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:24:02,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:24:02,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:24:06,660 INFO L130 PetriNetUnfolder]: 3726/7375 cut-off events. [2023-08-30 20:24:06,660 INFO L131 PetriNetUnfolder]: For 1467705/1467705 co-relation queries the response was YES. [2023-08-30 20:24:06,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100365 conditions, 7375 events. 3726/7375 cut-off events. For 1467705/1467705 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 61838 event pairs, 1357 based on Foata normal form. 96/7471 useless extension candidates. Maximal degree in co-relation 98807. Up to 6093 conditions per place. [2023-08-30 20:24:06,743 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 1043 selfloop transitions, 263 changer transitions 3/1309 dead transitions. [2023-08-30 20:24:06,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1309 transitions, 34648 flow [2023-08-30 20:24:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 20:24:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 20:24:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2444 transitions. [2023-08-30 20:24:06,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495952906548933 [2023-08-30 20:24:06,746 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2444 transitions. [2023-08-30 20:24:06,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2444 transitions. [2023-08-30 20:24:06,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:24:06,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2444 transitions. [2023-08-30 20:24:06,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 67.88888888888889) internal successors, (2444), 36 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:06,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:06,754 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:06,754 INFO L175 Difference]: Start difference. First operand has 420 places, 1030 transitions, 26451 flow. Second operand 36 states and 2444 transitions. [2023-08-30 20:24:06,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1309 transitions, 34648 flow [2023-08-30 20:24:12,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1309 transitions, 33939 flow, removed 279 selfloop flow, removed 12 redundant places. [2023-08-30 20:24:12,528 INFO L231 Difference]: Finished difference. Result has 457 places, 1131 transitions, 29835 flow [2023-08-30 20:24:12,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=25991, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=29835, PETRI_PLACES=457, PETRI_TRANSITIONS=1131} [2023-08-30 20:24:12,529 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 437 predicate places. [2023-08-30 20:24:12,529 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1131 transitions, 29835 flow [2023-08-30 20:24:12,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:12,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:24:12,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:24:12,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 20:24:12,730 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,SelfDestructingSolverStorable22 [2023-08-30 20:24:12,730 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:24:12,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:24:12,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2047021096, now seen corresponding path program 19 times [2023-08-30 20:24:12,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:24:12,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252056656] [2023-08-30 20:24:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:24:12,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:24:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:24:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:12,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:24:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252056656] [2023-08-30 20:24:12,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252056656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:24:12,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874064367] [2023-08-30 20:24:12,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:24:12,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:24:12,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:24:12,861 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) [2023-08-30 20:24:12,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 20:24:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:24:12,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:24:12,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:24:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:13,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:24:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:13,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874064367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:24:13,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:24:13,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 20:24:13,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597454933] [2023-08-30 20:24:13,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:24:13,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:24:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:24:13,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:24:13,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:24:13,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:24:13,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1131 transitions, 29835 flow. Second operand has 16 states, 16 states have (on average 63.8125) internal successors, (1021), 16 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:13,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:24:13,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:24:13,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:24:17,064 INFO L130 PetriNetUnfolder]: 3929/7754 cut-off events. [2023-08-30 20:24:17,064 INFO L131 PetriNetUnfolder]: For 1847116/1847116 co-relation queries the response was YES. [2023-08-30 20:24:17,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108331 conditions, 7754 events. 3929/7754 cut-off events. For 1847116/1847116 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 65401 event pairs, 1523 based on Foata normal form. 140/7894 useless extension candidates. Maximal degree in co-relation 107213. Up to 6927 conditions per place. [2023-08-30 20:24:17,172 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 1158 selfloop transitions, 186 changer transitions 4/1348 dead transitions. [2023-08-30 20:24:17,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1348 transitions, 35943 flow [2023-08-30 20:24:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 20:24:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 20:24:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2440 transitions. [2023-08-30 20:24:17,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44885945548197204 [2023-08-30 20:24:17,175 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2440 transitions. [2023-08-30 20:24:17,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2440 transitions. [2023-08-30 20:24:17,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:24:17,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2440 transitions. [2023-08-30 20:24:17,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 67.77777777777777) internal successors, (2440), 36 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:17,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:17,182 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:17,182 INFO L175 Difference]: Start difference. First operand has 457 places, 1131 transitions, 29835 flow. Second operand 36 states and 2440 transitions. [2023-08-30 20:24:17,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1348 transitions, 35943 flow [2023-08-30 20:24:25,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1348 transitions, 34927 flow, removed 427 selfloop flow, removed 15 redundant places. [2023-08-30 20:24:25,298 INFO L231 Difference]: Finished difference. Result has 493 places, 1210 transitions, 31314 flow [2023-08-30 20:24:25,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=28819, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31314, PETRI_PLACES=493, PETRI_TRANSITIONS=1210} [2023-08-30 20:24:25,300 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 473 predicate places. [2023-08-30 20:24:25,300 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1210 transitions, 31314 flow [2023-08-30 20:24:25,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.8125) internal successors, (1021), 16 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:25,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:24:25,301 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:24:25,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 20:24:25,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:24:25,506 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:24:25,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:24:25,506 INFO L85 PathProgramCache]: Analyzing trace with hash -447011944, now seen corresponding path program 20 times [2023-08-30 20:24:25,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:24:25,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080122656] [2023-08-30 20:24:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:24:25,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:24:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:24:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:25,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:24:25,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080122656] [2023-08-30 20:24:25,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080122656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:24:25,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265101038] [2023-08-30 20:24:25,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:24:25,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:24:25,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:24:25,759 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) [2023-08-30 20:24:25,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 20:24:25,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:24:25,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:24:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:24:25,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:24:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:25,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:24:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:26,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265101038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:24:26,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:24:26,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-30 20:24:26,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800714470] [2023-08-30 20:24:26,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:24:26,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:24:26,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:24:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:24:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:24:26,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:24:26,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1210 transitions, 31314 flow. Second operand has 21 states, 21 states have (on average 63.61904761904762) internal successors, (1336), 21 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:26,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:24:26,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:24:26,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:24:31,839 INFO L130 PetriNetUnfolder]: 4369/8746 cut-off events. [2023-08-30 20:24:31,839 INFO L131 PetriNetUnfolder]: For 2475670/2475670 co-relation queries the response was YES. [2023-08-30 20:24:31,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129968 conditions, 8746 events. 4369/8746 cut-off events. For 2475670/2475670 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 76357 event pairs, 753 based on Foata normal form. 66/8812 useless extension candidates. Maximal degree in co-relation 128951. Up to 3024 conditions per place. [2023-08-30 20:24:31,970 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 654 selfloop transitions, 859 changer transitions 15/1528 dead transitions. [2023-08-30 20:24:31,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 1528 transitions, 41320 flow [2023-08-30 20:24:31,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 20:24:31,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 20:24:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2344 transitions. [2023-08-30 20:24:31,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565640825866771 [2023-08-30 20:24:31,973 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2344 transitions. [2023-08-30 20:24:31,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2344 transitions. [2023-08-30 20:24:31,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:24:31,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2344 transitions. [2023-08-30 20:24:31,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 68.94117647058823) internal successors, (2344), 34 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:31,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 151.0) internal successors, (5285), 35 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:31,980 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 151.0) internal successors, (5285), 35 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:31,980 INFO L175 Difference]: Start difference. First operand has 493 places, 1210 transitions, 31314 flow. Second operand 34 states and 2344 transitions. [2023-08-30 20:24:31,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 1528 transitions, 41320 flow [2023-08-30 20:24:41,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1528 transitions, 39723 flow, removed 731 selfloop flow, removed 10 redundant places. [2023-08-30 20:24:41,774 INFO L231 Difference]: Finished difference. Result has 531 places, 1327 transitions, 36308 flow [2023-08-30 20:24:41,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=30014, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=36308, PETRI_PLACES=531, PETRI_TRANSITIONS=1327} [2023-08-30 20:24:41,775 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 511 predicate places. [2023-08-30 20:24:41,775 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1327 transitions, 36308 flow [2023-08-30 20:24:41,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.61904761904762) internal successors, (1336), 21 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:41,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:24:41,775 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:24:41,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 20:24:41,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:24:41,976 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:24:41,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:24:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash -431522972, now seen corresponding path program 21 times [2023-08-30 20:24:41,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:24:41,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127427153] [2023-08-30 20:24:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:24:41,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:24:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:24:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:42,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:24:42,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127427153] [2023-08-30 20:24:42,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127427153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:24:42,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753637627] [2023-08-30 20:24:42,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:24:42,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:24:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:24:42,184 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) [2023-08-30 20:24:42,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 20:24:42,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 20:24:42,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:24:42,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:24:42,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:24:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:42,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:24:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:42,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753637627] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:24:42,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:24:42,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-30 20:24:42,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351606868] [2023-08-30 20:24:42,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:24:42,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:24:42,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:24:42,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:24:42,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:24:42,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:24:42,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1327 transitions, 36308 flow. Second operand has 21 states, 21 states have (on average 63.57142857142857) internal successors, (1335), 21 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:42,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:24:42,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:24:42,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:24:49,421 INFO L130 PetriNetUnfolder]: 4343/8662 cut-off events. [2023-08-30 20:24:49,421 INFO L131 PetriNetUnfolder]: For 2683576/2683576 co-relation queries the response was YES. [2023-08-30 20:24:49,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137974 conditions, 8662 events. 4343/8662 cut-off events. For 2683576/2683576 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 75308 event pairs, 309 based on Foata normal form. 22/8684 useless extension candidates. Maximal degree in co-relation 136861. Up to 2242 conditions per place. [2023-08-30 20:24:49,535 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 462 selfloop transitions, 1043 changer transitions 20/1525 dead transitions. [2023-08-30 20:24:49,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1525 transitions, 43576 flow [2023-08-30 20:24:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 20:24:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 20:24:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3532 transitions. [2023-08-30 20:24:49,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441334499562664 [2023-08-30 20:24:49,538 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3532 transitions. [2023-08-30 20:24:49,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3532 transitions. [2023-08-30 20:24:49,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:24:49,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3532 transitions. [2023-08-30 20:24:49,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 66.64150943396227) internal successors, (3532), 53 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:49,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 151.0) internal successors, (8154), 54 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:49,548 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 151.0) internal successors, (8154), 54 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:49,548 INFO L175 Difference]: Start difference. First operand has 531 places, 1327 transitions, 36308 flow. Second operand 53 states and 3532 transitions. [2023-08-30 20:24:49,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1525 transitions, 43576 flow [2023-08-30 20:25:00,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1525 transitions, 42749 flow, removed 368 selfloop flow, removed 14 redundant places. [2023-08-30 20:25:00,646 INFO L231 Difference]: Finished difference. Result has 576 places, 1372 transitions, 39675 flow [2023-08-30 20:25:00,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=35525, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=39675, PETRI_PLACES=576, PETRI_TRANSITIONS=1372} [2023-08-30 20:25:00,647 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 556 predicate places. [2023-08-30 20:25:00,647 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1372 transitions, 39675 flow [2023-08-30 20:25:00,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.57142857142857) internal successors, (1335), 21 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:00,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:25:00,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:25:00,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 20:25:00,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 20:25:00,848 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:25:00,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:25:00,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1260313288, now seen corresponding path program 22 times [2023-08-30 20:25:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:25:00,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416891932] [2023-08-30 20:25:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:25:00,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:25:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:25:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:00,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:25:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416891932] [2023-08-30 20:25:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416891932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:25:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106419353] [2023-08-30 20:25:00,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:25:00,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:25:00,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:25:00,969 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) [2023-08-30 20:25:01,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 20:25:01,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:25:01,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:25:01,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:25:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:25:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:01,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:25:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:01,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106419353] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:25:01,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:25:01,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 20:25:01,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199577384] [2023-08-30 20:25:01,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:25:01,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:25:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:25:01,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:25:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:25:01,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:25:01,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1372 transitions, 39675 flow. Second operand has 17 states, 17 states have (on average 63.705882352941174) internal successors, (1083), 17 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:01,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:25:01,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:25:01,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:25:07,082 INFO L130 PetriNetUnfolder]: 4554/9035 cut-off events. [2023-08-30 20:25:07,083 INFO L131 PetriNetUnfolder]: For 2969489/2969489 co-relation queries the response was YES. [2023-08-30 20:25:07,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145649 conditions, 9035 events. 4554/9035 cut-off events. For 2969489/2969489 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 78522 event pairs, 1398 based on Foata normal form. 70/9105 useless extension candidates. Maximal degree in co-relation 144763. Up to 6692 conditions per place. [2023-08-30 20:25:07,214 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1085 selfloop transitions, 463 changer transitions 21/1569 dead transitions. [2023-08-30 20:25:07,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1569 transitions, 47022 flow [2023-08-30 20:25:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 20:25:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 20:25:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1969 transitions. [2023-08-30 20:25:07,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44964603790819824 [2023-08-30 20:25:07,216 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1969 transitions. [2023-08-30 20:25:07,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1969 transitions. [2023-08-30 20:25:07,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:25:07,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1969 transitions. [2023-08-30 20:25:07,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 67.89655172413794) internal successors, (1969), 29 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:07,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 151.0) internal successors, (4530), 30 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:07,222 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 151.0) internal successors, (4530), 30 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:07,222 INFO L175 Difference]: Start difference. First operand has 576 places, 1372 transitions, 39675 flow. Second operand 29 states and 1969 transitions. [2023-08-30 20:25:07,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1569 transitions, 47022 flow [2023-08-30 20:25:20,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1569 transitions, 44869 flow, removed 842 selfloop flow, removed 19 redundant places. [2023-08-30 20:25:20,970 INFO L231 Difference]: Finished difference. Result has 592 places, 1442 transitions, 41737 flow [2023-08-30 20:25:20,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=37992, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=41737, PETRI_PLACES=592, PETRI_TRANSITIONS=1442} [2023-08-30 20:25:20,971 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 572 predicate places. [2023-08-30 20:25:20,971 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1442 transitions, 41737 flow [2023-08-30 20:25:20,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 63.705882352941174) internal successors, (1083), 17 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:20,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:25:20,972 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:25:20,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 20:25:21,176 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,SelfDestructingSolverStorable26 [2023-08-30 20:25:21,177 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:25:21,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:25:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1434236764, now seen corresponding path program 23 times [2023-08-30 20:25:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:25:21,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4383507] [2023-08-30 20:25:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:25:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:25:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:25:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:21,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:25:21,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4383507] [2023-08-30 20:25:21,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4383507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:25:21,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121374165] [2023-08-30 20:25:21,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:25:21,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:25:21,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:25:21,325 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) [2023-08-30 20:25:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 20:25:21,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:25:21,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:25:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 20:25:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:25:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:25:21,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:25:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:25:21,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121374165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:25:21,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:25:21,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 20:25:21,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063341760] [2023-08-30 20:25:21,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:25:21,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:25:21,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:25:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:25:21,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:25:21,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 151 [2023-08-30 20:25:21,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1442 transitions, 41737 flow. Second operand has 13 states, 13 states have (on average 68.46153846153847) internal successors, (890), 13 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:21,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:25:21,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 151 [2023-08-30 20:25:21,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:25:28,145 INFO L130 PetriNetUnfolder]: 5686/11328 cut-off events. [2023-08-30 20:25:28,145 INFO L131 PetriNetUnfolder]: For 3857478/3857478 co-relation queries the response was YES. [2023-08-30 20:25:28,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191662 conditions, 11328 events. 5686/11328 cut-off events. For 3857478/3857478 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 102236 event pairs, 603 based on Foata normal form. 194/11522 useless extension candidates. Maximal degree in co-relation 190401. Up to 5610 conditions per place. [2023-08-30 20:25:28,326 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1065 selfloop transitions, 701 changer transitions 149/1917 dead transitions. [2023-08-30 20:25:28,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 1917 transitions, 59403 flow [2023-08-30 20:25:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:25:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:25:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 523 transitions. [2023-08-30 20:25:28,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49479659413434246 [2023-08-30 20:25:28,327 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 523 transitions. [2023-08-30 20:25:28,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 523 transitions. [2023-08-30 20:25:28,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:25:28,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 523 transitions. [2023-08-30 20:25:28,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.71428571428571) internal successors, (523), 7 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:28,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:28,329 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:28,329 INFO L175 Difference]: Start difference. First operand has 592 places, 1442 transitions, 41737 flow. Second operand 7 states and 523 transitions. [2023-08-30 20:25:28,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 1917 transitions, 59403 flow [2023-08-30 20:25:47,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 1917 transitions, 58893 flow, removed 167 selfloop flow, removed 19 redundant places. [2023-08-30 20:25:47,120 INFO L231 Difference]: Finished difference. Result has 580 places, 1641 transitions, 52029 flow [2023-08-30 20:25:47,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=41214, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52029, PETRI_PLACES=580, PETRI_TRANSITIONS=1641} [2023-08-30 20:25:47,121 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2023-08-30 20:25:47,122 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1641 transitions, 52029 flow [2023-08-30 20:25:47,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 68.46153846153847) internal successors, (890), 13 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:47,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:25:47,122 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:25:47,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 20:25:47,327 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,SelfDestructingSolverStorable27 [2023-08-30 20:25:47,327 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:25:47,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:25:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -145152391, now seen corresponding path program 24 times [2023-08-30 20:25:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:25:47,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424580207] [2023-08-30 20:25:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:25:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:25:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:25:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:47,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:25:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424580207] [2023-08-30 20:25:47,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424580207] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:25:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052836105] [2023-08-30 20:25:47,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:25:47,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:25:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:25:47,497 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) [2023-08-30 20:25:47,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 20:25:47,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:25:47,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:25:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 20:25:47,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:25:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:47,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:25:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:47,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052836105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:25:47,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:25:47,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-30 20:25:47,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684450125] [2023-08-30 20:25:47,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:25:47,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:25:47,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:25:47,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:25:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:25:47,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:25:47,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1641 transitions, 52029 flow. Second operand has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:47,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:25:47,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:25:47,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:26:01,538 INFO L130 PetriNetUnfolder]: 9340/18621 cut-off events. [2023-08-30 20:26:01,538 INFO L131 PetriNetUnfolder]: For 6470012/6470012 co-relation queries the response was YES. [2023-08-30 20:26:01,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314644 conditions, 18621 events. 9340/18621 cut-off events. For 6470012/6470012 co-relation queries the response was YES. Maximal size of possible extension queue 1456. Compared 179437 event pairs, 1197 based on Foata normal form. 166/18787 useless extension candidates. Maximal degree in co-relation 312947. Up to 6831 conditions per place. [2023-08-30 20:26:01,858 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 2495 selfloop transitions, 630 changer transitions 2/3127 dead transitions. [2023-08-30 20:26:01,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 3127 transitions, 101680 flow [2023-08-30 20:26:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 20:26:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 20:26:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1791 transitions. [2023-08-30 20:26:01,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45618950585838003 [2023-08-30 20:26:01,860 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1791 transitions. [2023-08-30 20:26:01,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1791 transitions. [2023-08-30 20:26:01,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:26:01,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1791 transitions. [2023-08-30 20:26:01,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 68.88461538461539) internal successors, (1791), 26 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:26:01,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:26:01,865 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:26:01,865 INFO L175 Difference]: Start difference. First operand has 580 places, 1641 transitions, 52029 flow. Second operand 26 states and 1791 transitions. [2023-08-30 20:26:01,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 3127 transitions, 101680 flow [2023-08-30 20:26:37,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 3127 transitions, 100162 flow, removed 692 selfloop flow, removed 16 redundant places. [2023-08-30 20:26:37,347 INFO L231 Difference]: Finished difference. Result has 582 places, 2016 transitions, 64382 flow [2023-08-30 20:26:37,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=51163, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=64382, PETRI_PLACES=582, PETRI_TRANSITIONS=2016} [2023-08-30 20:26:37,350 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 562 predicate places. [2023-08-30 20:26:37,350 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 2016 transitions, 64382 flow [2023-08-30 20:26:37,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:26:37,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:26:37,351 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:26:37,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 20:26:37,556 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,SelfDestructingSolverStorable28 [2023-08-30 20:26:37,557 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:26:37,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:26:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2084131937, now seen corresponding path program 25 times [2023-08-30 20:26:37,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:26:37,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626821915] [2023-08-30 20:26:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:26:37,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:26:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:26:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:26:37,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:26:37,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626821915] [2023-08-30 20:26:37,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626821915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:26:37,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965887423] [2023-08-30 20:26:37,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:26:37,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:26:37,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:26:37,741 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) [2023-08-30 20:26:37,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 20:26:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:26:37,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 20:26:37,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:26:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:26:37,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:26:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:26:38,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965887423] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:26:38,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:26:38,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 20:26:38,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021659637] [2023-08-30 20:26:38,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:26:38,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 20:26:38,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:26:38,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 20:26:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-08-30 20:26:38,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:26:38,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 2016 transitions, 64382 flow. Second operand has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:26:38,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:26:38,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:26:38,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:27:00,069 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 [] [2023-08-30 20:27:49,591 INFO L130 PetriNetUnfolder]: 10436/21121 cut-off events. [2023-08-30 20:27:49,592 INFO L131 PetriNetUnfolder]: For 7299485/7299485 co-relation queries the response was YES. [2023-08-30 20:27:49,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377370 conditions, 21121 events. 10436/21121 cut-off events. For 7299485/7299485 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 210437 event pairs, 326 based on Foata normal form. 84/21205 useless extension candidates. Maximal degree in co-relation 375631. Up to 4533 conditions per place. [2023-08-30 20:27:50,093 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 785 selfloop transitions, 2966 changer transitions 72/3823 dead transitions. [2023-08-30 20:27:50,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 3823 transitions, 129828 flow [2023-08-30 20:27:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-08-30 20:27:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2023-08-30 20:27:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 7444 transitions. [2023-08-30 20:27:50,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481637567730283 [2023-08-30 20:27:50,098 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 7444 transitions. [2023-08-30 20:27:50,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 7444 transitions. [2023-08-30 20:27:50,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:27:50,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 7444 transitions. [2023-08-30 20:27:50,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 67.67272727272727) internal successors, (7444), 110 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:27:50,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 151.0) internal successors, (16761), 111 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:27:50,115 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 151.0) internal successors, (16761), 111 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:27:50,115 INFO L175 Difference]: Start difference. First operand has 582 places, 2016 transitions, 64382 flow. Second operand 110 states and 7444 transitions. [2023-08-30 20:27:50,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 3823 transitions, 129828 flow [2023-08-30 20:28:35,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 3823 transitions, 127564 flow, removed 1034 selfloop flow, removed 10 redundant places. [2023-08-30 20:28:35,615 INFO L231 Difference]: Finished difference. Result has 718 places, 3250 transitions, 115680 flow [2023-08-30 20:28:35,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=62622, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=115680, PETRI_PLACES=718, PETRI_TRANSITIONS=3250} [2023-08-30 20:28:35,617 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 698 predicate places. [2023-08-30 20:28:35,617 INFO L495 AbstractCegarLoop]: Abstraction has has 718 places, 3250 transitions, 115680 flow [2023-08-30 20:28:35,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:28:35,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:35,618 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:35,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 20:28:35,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:35,823 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:28:35,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:35,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1255341621, now seen corresponding path program 26 times [2023-08-30 20:28:35,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:35,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203534341] [2023-08-30 20:28:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:35,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:35,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:35,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203534341] [2023-08-30 20:28:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203534341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:35,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72993890] [2023-08-30 20:28:35,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:28:35,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:35,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:35,992 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) [2023-08-30 20:28:35,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 20:28:36,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:28:36,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:28:36,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 20:28:36,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:36,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:36,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72993890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:28:36,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:28:36,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-30 20:28:36,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927275070] [2023-08-30 20:28:36,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:28:36,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:28:36,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:36,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:28:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:28:36,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:28:36,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 718 places, 3250 transitions, 115680 flow. Second operand has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:28:36,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:36,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:28:36,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:41,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:29:15,150 INFO L130 PetriNetUnfolder]: 12396/25172 cut-off events. [2023-08-30 20:29:15,150 INFO L131 PetriNetUnfolder]: For 17538152/17538152 co-relation queries the response was YES. [2023-08-30 20:29:15,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517059 conditions, 25172 events. 12396/25172 cut-off events. For 17538152/17538152 co-relation queries the response was YES. Maximal size of possible extension queue 1853. Compared 257390 event pairs, 1261 based on Foata normal form. 630/25802 useless extension candidates. Maximal degree in co-relation 514695. Up to 5707 conditions per place. [2023-08-30 20:29:15,713 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 2437 selfloop transitions, 1987 changer transitions 90/4514 dead transitions. [2023-08-30 20:29:15,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 4514 transitions, 161950 flow [2023-08-30 20:29:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-30 20:29:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-30 20:29:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5111 transitions. [2023-08-30 20:29:15,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45130242825607064 [2023-08-30 20:29:15,719 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5111 transitions. [2023-08-30 20:29:15,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5111 transitions. [2023-08-30 20:29:15,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:29:15,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5111 transitions. [2023-08-30 20:29:15,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 68.14666666666666) internal successors, (5111), 75 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:29:15,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:29:15,733 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:29:15,733 INFO L175 Difference]: Start difference. First operand has 718 places, 3250 transitions, 115680 flow. Second operand 75 states and 5111 transitions. [2023-08-30 20:29:15,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 4514 transitions, 161950 flow [2023-08-30 20:31:47,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 4514 transitions, 145713 flow, removed 7641 selfloop flow, removed 26 redundant places. [2023-08-30 20:31:47,800 INFO L231 Difference]: Finished difference. Result has 800 places, 3816 transitions, 129047 flow [2023-08-30 20:31:47,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=103467, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=129047, PETRI_PLACES=800, PETRI_TRANSITIONS=3816} [2023-08-30 20:31:47,804 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 780 predicate places. [2023-08-30 20:31:47,804 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 3816 transitions, 129047 flow [2023-08-30 20:31:47,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:31:47,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:31:47,804 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:31:47,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 20:31:48,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:31:48,009 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:31:48,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:31:48,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2067403275, now seen corresponding path program 27 times [2023-08-30 20:31:48,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:31:48,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719054055] [2023-08-30 20:31:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:31:48,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:31:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:31:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:31:48,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:31:48,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719054055] [2023-08-30 20:31:48,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719054055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:31:48,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156914737] [2023-08-30 20:31:48,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:31:48,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:31:48,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:31:48,193 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) [2023-08-30 20:31:48,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 20:31:48,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 20:31:48,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:31:48,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 20:31:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:31:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:31:48,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:31:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:31:48,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156914737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:31:48,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:31:48,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 20:31:48,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768753662] [2023-08-30 20:31:48,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:31:48,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 20:31:48,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:31:48,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 20:31:48,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-08-30 20:31:48,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:31:48,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 3816 transitions, 129047 flow. Second operand has 23 states, 23 states have (on average 63.608695652173914) internal successors, (1463), 23 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:31:48,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:31:48,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:31:48,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:31:52,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:31:57,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:32:56,829 INFO L130 PetriNetUnfolder]: 13497/27696 cut-off events. [2023-08-30 20:32:56,829 INFO L131 PetriNetUnfolder]: For 22553315/22553315 co-relation queries the response was YES. [2023-08-30 20:32:57,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608026 conditions, 27696 events. 13497/27696 cut-off events. For 22553315/22553315 co-relation queries the response was YES. Maximal size of possible extension queue 1933. Compared 288041 event pairs, 880 based on Foata normal form. 246/27942 useless extension candidates. Maximal degree in co-relation 606339. Up to 5833 conditions per place. [2023-08-30 20:32:57,607 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1487 selfloop transitions, 3181 changer transitions 25/4693 dead transitions. [2023-08-30 20:32:57,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 4693 transitions, 162082 flow [2023-08-30 20:32:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-30 20:32:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-30 20:32:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 6362 transitions. [2023-08-30 20:32:57,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4530371003346863 [2023-08-30 20:32:57,612 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 6362 transitions. [2023-08-30 20:32:57,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 6362 transitions. [2023-08-30 20:32:57,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:57,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 6362 transitions. [2023-08-30 20:32:57,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 68.40860215053763) internal successors, (6362), 93 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:57,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 151.0) internal successors, (14194), 94 states have internal predecessors, (14194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:57,625 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 151.0) internal successors, (14194), 94 states have internal predecessors, (14194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:57,625 INFO L175 Difference]: Start difference. First operand has 800 places, 3816 transitions, 129047 flow. Second operand 93 states and 6362 transitions. [2023-08-30 20:32:57,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 4693 transitions, 162082 flow [2023-08-30 20:35:48,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 867 places, 4693 transitions, 156933 flow, removed 2060 selfloop flow, removed 25 redundant places. [2023-08-30 20:35:49,076 INFO L231 Difference]: Finished difference. Result has 890 places, 4081 transitions, 140781 flow [2023-08-30 20:35:49,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=123670, PETRI_DIFFERENCE_MINUEND_PLACES=775, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2909, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=140781, PETRI_PLACES=890, PETRI_TRANSITIONS=4081} [2023-08-30 20:35:49,080 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 870 predicate places. [2023-08-30 20:35:49,080 INFO L495 AbstractCegarLoop]: Abstraction has has 890 places, 4081 transitions, 140781 flow [2023-08-30 20:35:49,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.608695652173914) internal successors, (1463), 23 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:49,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:35:49,080 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:35:49,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-30 20:35:49,285 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,SelfDestructingSolverStorable31 [2023-08-30 20:35:49,285 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:35:49,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:35:49,285 INFO L85 PathProgramCache]: Analyzing trace with hash 468633813, now seen corresponding path program 28 times [2023-08-30 20:35:49,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:35:49,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855647991] [2023-08-30 20:35:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:35:49,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:35:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:35:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:35:49,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:35:49,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855647991] [2023-08-30 20:35:49,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855647991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:35:49,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379860103] [2023-08-30 20:35:49,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:35:49,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:35:49,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:35:49,457 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) [2023-08-30 20:35:49,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 20:35:49,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:35:49,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:35:49,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 20:35:49,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:35:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:35:49,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:35:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:35:49,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379860103] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:35:49,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:35:49,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-08-30 20:35:49,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570527361] [2023-08-30 20:35:49,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:35:49,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:35:49,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:35:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:35:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:35:49,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 20:35:49,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 890 places, 4081 transitions, 140781 flow. Second operand has 21 states, 21 states have (on average 63.61904761904762) internal successors, (1336), 21 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:49,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:35:49,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 20:35:49,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15