./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.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-more-array-sum-alt.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 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --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 20:28:07,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:28:07,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:28:07,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:28:07,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:28:07,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:28:07,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:28:07,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:28:07,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:28:07,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:28:07,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:28:07,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:28:07,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:28:07,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:28:07,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:28:07,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:28:07,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:28:07,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:28:07,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:28:07,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:28:07,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:28:07,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:28:07,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:28:07,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:28:07,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:28:07,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:28:07,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:28:07,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:28:07,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:28:07,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:28:07,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:28:07,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:28:07,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:28:07,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:28:07,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:28:07,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:28:07,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:28:07,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:28:07,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:28:07,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:28:07,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:28:07,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:28:07,955 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:28:07,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:28:07,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:28:07,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:28:07,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:28:07,957 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:28:07,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:28:07,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:28:07,958 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:28:07,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:28:07,959 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:28:07,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:28:07,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:28:07,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:28:07,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:28:07,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:28:07,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:28:07,960 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:28:07,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:28:07,960 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:28:07,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:28:07,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:28:07,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:28:07,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:28:07,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:28:07,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:28:07,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:28:07,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:28:07,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:28:07,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:28:07,962 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:28:07,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:28:07,963 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:28:07,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:28:07,963 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:28:07,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:28:08,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:28:08,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:28:08,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:28:08,297 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:28:08,298 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:28:08,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2023-08-30 20:28:09,535 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:28:09,753 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:28:09,754 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2023-08-30 20:28:09,759 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1f85ccf/f4cc527b814446f180443ec29f2d285b/FLAG144591333 [2023-08-30 20:28:09,773 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1f85ccf/f4cc527b814446f180443ec29f2d285b [2023-08-30 20:28:09,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:28:09,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:28:09,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:28:09,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:28:09,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:28:09,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:28:09" (1/1) ... [2023-08-30 20:28:09,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6099f0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:09, skipping insertion in model container [2023-08-30 20:28:09,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:28:09" (1/1) ... [2023-08-30 20:28:09,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:28:09,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:28:09,961 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2023-08-30 20:28:09,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:28:09,991 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:28:10,027 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2023-08-30 20:28:10,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:28:10,043 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:28:10,044 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:28:10,050 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:28:10,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10 WrapperNode [2023-08-30 20:28:10,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:28:10,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:28:10,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:28:10,052 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:28:10,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,118 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 203 [2023-08-30 20:28:10,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:28:10,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:28:10,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:28:10,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:28:10,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,153 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:28:10,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:28:10,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:28:10,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:28:10,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (1/1) ... [2023-08-30 20:28:10,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:28:10,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:10,186 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 20:28:10,219 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 20:28:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:28:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:28:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:28:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:28:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:28:10,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:28:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:28:10,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:28:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 20:28:10,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 20:28:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:28:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:28:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:28:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:28:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:28:10,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:28:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:28:10,237 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 20:28:10,363 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:28:10,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:28:10,684 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:28:10,810 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:28:10,812 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 20:28:10,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:28:10 BoogieIcfgContainer [2023-08-30 20:28:10,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:28:10,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:28:10,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:28:10,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:28:10,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:28:09" (1/3) ... [2023-08-30 20:28:10,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b723c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:28:10, skipping insertion in model container [2023-08-30 20:28:10,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:28:10" (2/3) ... [2023-08-30 20:28:10,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b723c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:28:10, skipping insertion in model container [2023-08-30 20:28:10,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:28:10" (3/3) ... [2023-08-30 20:28:10,823 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2023-08-30 20:28:10,830 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:28:10,838 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:28:10,838 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:28:10,839 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:28:10,927 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 20:28:10,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 147 transitions, 318 flow [2023-08-30 20:28:11,065 INFO L130 PetriNetUnfolder]: 12/144 cut-off events. [2023-08-30 20:28:11,066 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:28:11,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 144 events. 12/144 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-30 20:28:11,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 147 transitions, 318 flow [2023-08-30 20:28:11,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 134 transitions, 286 flow [2023-08-30 20:28:11,082 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:28:11,102 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 134 transitions, 286 flow [2023-08-30 20:28:11,104 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 134 transitions, 286 flow [2023-08-30 20:28:11,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 134 transitions, 286 flow [2023-08-30 20:28:11,140 INFO L130 PetriNetUnfolder]: 12/134 cut-off events. [2023-08-30 20:28:11,141 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:28:11,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 134 events. 12/134 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 98 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-30 20:28:11,146 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-08-30 20:28:15,918 INFO L134 LiptonReduction]: Checked pairs total: 2063 [2023-08-30 20:28:15,918 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-30 20:28:15,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:28:15,934 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;@b330f25, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:28:15,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 20:28:15,940 INFO L130 PetriNetUnfolder]: 4/25 cut-off events. [2023-08-30 20:28:15,940 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:28:15,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:15,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:15,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:15,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1370048822, now seen corresponding path program 1 times [2023-08-30 20:28:15,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:15,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126514603] [2023-08-30 20:28:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:15,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:16,405 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 20:28:16,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:16,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126514603] [2023-08-30 20:28:16,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126514603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:28:16,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:28:16,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:28:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775721819] [2023-08-30 20:28:16,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:28:16,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:28:16,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:16,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:28:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:28:16,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 274 [2023-08-30 20:28:16,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 20:28:16,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:16,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 274 [2023-08-30 20:28:16,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:16,632 INFO L130 PetriNetUnfolder]: 619/869 cut-off events. [2023-08-30 20:28:16,632 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-30 20:28:16,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 869 events. 619/869 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3396 event pairs, 95 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 1365. Up to 688 conditions per place. [2023-08-30 20:28:16,642 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 36 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2023-08-30 20:28:16,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 203 flow [2023-08-30 20:28:16,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:28:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:28:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-30 20:28:16,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036496350364964 [2023-08-30 20:28:16,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-30 20:28:16,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-30 20:28:16,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:16,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-30 20:28:16,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 20:28:16,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 20:28:16,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 20:28:16,694 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 70 flow. Second operand 3 states and 414 transitions. [2023-08-30 20:28:16,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 203 flow [2023-08-30 20:28:16,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 44 transitions, 181 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 20:28:16,701 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 84 flow [2023-08-30 20:28:16,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-08-30 20:28:16,706 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-30 20:28:16,707 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 84 flow [2023-08-30 20:28:16,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 20:28:16,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:16,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:16,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:28:16,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:16,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1687574261, now seen corresponding path program 1 times [2023-08-30 20:28:16,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:16,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773585806] [2023-08-30 20:28:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:16,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:16,916 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 20:28:16,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:16,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773585806] [2023-08-30 20:28:16,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773585806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:28:16,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:28:16,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:28:16,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470661976] [2023-08-30 20:28:16,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:28:16,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:28:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:16,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:28:16,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:28:16,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 274 [2023-08-30 20:28:16,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 20:28:16,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:16,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 274 [2023-08-30 20:28:16,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:17,229 INFO L130 PetriNetUnfolder]: 1149/1685 cut-off events. [2023-08-30 20:28:17,229 INFO L131 PetriNetUnfolder]: For 279/279 co-relation queries the response was YES. [2023-08-30 20:28:17,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3857 conditions, 1685 events. 1149/1685 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7707 event pairs, 604 based on Foata normal form. 62/1379 useless extension candidates. Maximal degree in co-relation 1014. Up to 872 conditions per place. [2023-08-30 20:28:17,239 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 60 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-30 20:28:17,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 66 transitions, 316 flow [2023-08-30 20:28:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:28:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:28:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 658 transitions. [2023-08-30 20:28:17,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802919708029197 [2023-08-30 20:28:17,242 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 658 transitions. [2023-08-30 20:28:17,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 658 transitions. [2023-08-30 20:28:17,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:17,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 658 transitions. [2023-08-30 20:28:17,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 20:28:17,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 20:28:17,248 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 20:28:17,248 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 84 flow. Second operand 5 states and 658 transitions. [2023-08-30 20:28:17,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 66 transitions, 316 flow [2023-08-30 20:28:17,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:28:17,251 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 110 flow [2023-08-30 20:28:17,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-30 20:28:17,252 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-30 20:28:17,252 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 110 flow [2023-08-30 20:28:17,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 20:28:17,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:17,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:17,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:28:17,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:17,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1620014424, now seen corresponding path program 1 times [2023-08-30 20:28:17,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:17,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111188995] [2023-08-30 20:28:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:17,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:17,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:17,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111188995] [2023-08-30 20:28:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111188995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534905063] [2023-08-30 20:28:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:17,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:17,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:17,385 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 20:28:17,407 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 20:28:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:17,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:28:17,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:17,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:17,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534905063] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:17,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:28:17,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-08-30 20:28:17,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957463272] [2023-08-30 20:28:17,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:28:17,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:28:17,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:17,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:28:17,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:28:17,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-30 20:28:17,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 20:28:17,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:17,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-30 20:28:17,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:18,235 INFO L130 PetriNetUnfolder]: 1377/2035 cut-off events. [2023-08-30 20:28:18,236 INFO L131 PetriNetUnfolder]: For 771/847 co-relation queries the response was YES. [2023-08-30 20:28:18,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 2035 events. 1377/2035 cut-off events. For 771/847 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9548 event pairs, 437 based on Foata normal form. 76/1813 useless extension candidates. Maximal degree in co-relation 3286. Up to 520 conditions per place. [2023-08-30 20:28:18,247 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 105 selfloop transitions, 23 changer transitions 0/130 dead transitions. [2023-08-30 20:28:18,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 130 transitions, 653 flow [2023-08-30 20:28:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:28:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:28:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1225 transitions. [2023-08-30 20:28:18,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470802919708029 [2023-08-30 20:28:18,251 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1225 transitions. [2023-08-30 20:28:18,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1225 transitions. [2023-08-30 20:28:18,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:18,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1225 transitions. [2023-08-30 20:28:18,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.5) internal successors, (1225), 10 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 20:28:18,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 274.0) internal successors, (3014), 11 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states 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 20:28:18,262 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 274.0) internal successors, (3014), 11 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states 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 20:28:18,262 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 110 flow. Second operand 10 states and 1225 transitions. [2023-08-30 20:28:18,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 130 transitions, 653 flow [2023-08-30 20:28:18,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 130 transitions, 649 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:28:18,266 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 269 flow [2023-08-30 20:28:18,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2023-08-30 20:28:18,266 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-08-30 20:28:18,267 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 269 flow [2023-08-30 20:28:18,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 20:28:18,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:18,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:18,276 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 20:28:18,473 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 20:28:18,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:18,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:18,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1693539329, now seen corresponding path program 1 times [2023-08-30 20:28:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:18,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14994094] [2023-08-30 20:28:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:18,664 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 20:28:18,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:18,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14994094] [2023-08-30 20:28:18,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14994094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:28:18,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:28:18,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:28:18,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21249392] [2023-08-30 20:28:18,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:28:18,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:28:18,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:18,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:28:18,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:28:18,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 274 [2023-08-30 20:28:18,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 20:28:18,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:18,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 274 [2023-08-30 20:28:18,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:18,979 INFO L130 PetriNetUnfolder]: 1115/1653 cut-off events. [2023-08-30 20:28:18,980 INFO L131 PetriNetUnfolder]: For 2227/2285 co-relation queries the response was YES. [2023-08-30 20:28:18,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5250 conditions, 1653 events. 1115/1653 cut-off events. For 2227/2285 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7554 event pairs, 556 based on Foata normal form. 98/1731 useless extension candidates. Maximal degree in co-relation 4186. Up to 1284 conditions per place. [2023-08-30 20:28:18,990 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 67 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-08-30 20:28:18,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 481 flow [2023-08-30 20:28:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:28:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:28:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-08-30 20:28:18,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737226277372263 [2023-08-30 20:28:18,992 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-08-30 20:28:18,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-08-30 20:28:18,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:18,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-08-30 20:28:18,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 20:28:18,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 20:28:18,997 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 20:28:18,998 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 269 flow. Second operand 5 states and 649 transitions. [2023-08-30 20:28:18,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 481 flow [2023-08-30 20:28:19,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 480 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:28:19,007 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 271 flow [2023-08-30 20:28:19,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-08-30 20:28:19,007 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-30 20:28:19,008 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 271 flow [2023-08-30 20:28:19,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 20:28:19,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:19,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:19,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:28:19,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:19,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:19,009 INFO L85 PathProgramCache]: Analyzing trace with hash -590735817, now seen corresponding path program 1 times [2023-08-30 20:28:19,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:19,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310545003] [2023-08-30 20:28:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:19,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:19,129 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 20:28:19,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:19,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310545003] [2023-08-30 20:28:19,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310545003] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:28:19,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:28:19,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:28:19,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28910538] [2023-08-30 20:28:19,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:28:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:28:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:19,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:28:19,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:28:19,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 274 [2023-08-30 20:28:19,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 20:28:19,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:19,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 274 [2023-08-30 20:28:19,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:19,523 INFO L130 PetriNetUnfolder]: 937/1384 cut-off events. [2023-08-30 20:28:19,523 INFO L131 PetriNetUnfolder]: For 1939/2017 co-relation queries the response was YES. [2023-08-30 20:28:19,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 1384 events. 937/1384 cut-off events. For 1939/2017 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6114 event pairs, 376 based on Foata normal form. 92/1470 useless extension candidates. Maximal degree in co-relation 4143. Up to 975 conditions per place. [2023-08-30 20:28:19,532 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 52 selfloop transitions, 3 changer transitions 25/83 dead transitions. [2023-08-30 20:28:19,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 541 flow [2023-08-30 20:28:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:28:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:28:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 767 transitions. [2023-08-30 20:28:19,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46654501216545013 [2023-08-30 20:28:19,536 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 767 transitions. [2023-08-30 20:28:19,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 767 transitions. [2023-08-30 20:28:19,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:19,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 767 transitions. [2023-08-30 20:28:19,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.83333333333333) internal successors, (767), 6 states have internal predecessors, (767), 0 states have call successors, (0), 0 states 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 20:28:19,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states 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 20:28:19,541 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states 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 20:28:19,541 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 271 flow. Second operand 6 states and 767 transitions. [2023-08-30 20:28:19,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 541 flow [2023-08-30 20:28:19,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 511 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-30 20:28:19,550 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 219 flow [2023-08-30 20:28:19,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-30 20:28:19,551 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-30 20:28:19,551 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 219 flow [2023-08-30 20:28:19,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 20:28:19,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:19,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:19,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 20:28:19,552 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:19,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash 705664608, now seen corresponding path program 2 times [2023-08-30 20:28:19,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:19,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823909477] [2023-08-30 20:28:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:19,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:19,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823909477] [2023-08-30 20:28:19,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823909477] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:19,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555544916] [2023-08-30 20:28:19,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:28:19,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:19,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:19,679 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 20:28:19,697 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 20:28:19,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:28:19,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:28:19,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:28:19,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:19,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:19,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555544916] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:19,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:28:19,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-08-30 20:28:19,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817014855] [2023-08-30 20:28:19,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:28:19,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:28:19,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:19,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:28:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:28:20,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-30 20:28:20,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 219 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 20:28:20,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:20,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-30 20:28:20,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:20,425 INFO L130 PetriNetUnfolder]: 1525/2203 cut-off events. [2023-08-30 20:28:20,427 INFO L131 PetriNetUnfolder]: For 2637/2637 co-relation queries the response was YES. [2023-08-30 20:28:20,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7095 conditions, 2203 events. 1525/2203 cut-off events. For 2637/2637 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10103 event pairs, 265 based on Foata normal form. 16/2216 useless extension candidates. Maximal degree in co-relation 7067. Up to 772 conditions per place. [2023-08-30 20:28:20,441 INFO L137 encePairwiseOnDemand]: 263/274 looper letters, 74 selfloop transitions, 33 changer transitions 0/108 dead transitions. [2023-08-30 20:28:20,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 108 transitions, 719 flow [2023-08-30 20:28:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:28:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:28:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 965 transitions. [2023-08-30 20:28:20,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4402372262773723 [2023-08-30 20:28:20,444 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 965 transitions. [2023-08-30 20:28:20,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 965 transitions. [2023-08-30 20:28:20,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:20,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 965 transitions. [2023-08-30 20:28:20,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:28:20,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 20:28:20,453 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 20:28:20,453 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 219 flow. Second operand 8 states and 965 transitions. [2023-08-30 20:28:20,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 108 transitions, 719 flow [2023-08-30 20:28:20,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 108 transitions, 687 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-30 20:28:20,472 INFO L231 Difference]: Finished difference. Result has 53 places, 64 transitions, 469 flow [2023-08-30 20:28:20,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=469, PETRI_PLACES=53, PETRI_TRANSITIONS=64} [2023-08-30 20:28:20,474 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-30 20:28:20,474 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 64 transitions, 469 flow [2023-08-30 20:28:20,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 20:28:20,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:20,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:20,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:28:20,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 20:28:20,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:20,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash -186636764, now seen corresponding path program 3 times [2023-08-30 20:28:20,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:20,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534922204] [2023-08-30 20:28:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:20,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:20,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:20,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534922204] [2023-08-30 20:28:20,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534922204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:20,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471493736] [2023-08-30 20:28:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:28:20,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:20,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:20,841 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 20:28:20,869 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 20:28:20,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:28:20,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:28:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:28:20,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:21,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:21,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471493736] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:21,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:28:21,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-08-30 20:28:21,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699688180] [2023-08-30 20:28:21,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:28:21,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:28:21,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:21,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:28:21,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:28:21,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-30 20:28:21,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 469 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 20:28:21,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:21,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-30 20:28:21,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:21,640 INFO L130 PetriNetUnfolder]: 1631/2359 cut-off events. [2023-08-30 20:28:21,640 INFO L131 PetriNetUnfolder]: For 4764/4764 co-relation queries the response was YES. [2023-08-30 20:28:21,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9333 conditions, 2359 events. 1631/2359 cut-off events. For 4764/4764 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10944 event pairs, 201 based on Foata normal form. 12/2370 useless extension candidates. Maximal degree in co-relation 9304. Up to 720 conditions per place. [2023-08-30 20:28:21,660 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 100 selfloop transitions, 39 changer transitions 0/140 dead transitions. [2023-08-30 20:28:21,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 140 transitions, 1134 flow [2023-08-30 20:28:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:28:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:28:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1094 transitions. [2023-08-30 20:28:21,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44363341443633414 [2023-08-30 20:28:21,664 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1094 transitions. [2023-08-30 20:28:21,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1094 transitions. [2023-08-30 20:28:21,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:21,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1094 transitions. [2023-08-30 20:28:21,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.55555555555556) internal successors, (1094), 9 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states 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 20:28:21,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states 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 20:28:21,671 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states 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 20:28:21,671 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 469 flow. Second operand 9 states and 1094 transitions. [2023-08-30 20:28:21,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 140 transitions, 1134 flow [2023-08-30 20:28:21,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 140 transitions, 1123 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 20:28:21,696 INFO L231 Difference]: Finished difference. Result has 64 places, 81 transitions, 777 flow [2023-08-30 20:28:21,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=777, PETRI_PLACES=64, PETRI_TRANSITIONS=81} [2023-08-30 20:28:21,697 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-08-30 20:28:21,697 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 81 transitions, 777 flow [2023-08-30 20:28:21,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 20:28:21,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:21,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:21,706 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 20:28:21,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:21,904 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:21,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:21,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1323058908, now seen corresponding path program 4 times [2023-08-30 20:28:21,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:21,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906692848] [2023-08-30 20:28:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:21,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:22,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906692848] [2023-08-30 20:28:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906692848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113482529] [2023-08-30 20:28:22,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:28:22,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:22,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:22,058 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 20:28:22,061 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 20:28:22,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:28:22,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:28:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:28:22,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:22,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:22,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113482529] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:22,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:28:22,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-08-30 20:28:22,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002634179] [2023-08-30 20:28:22,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:28:22,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:28:22,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:22,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:28:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:28:22,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-30 20:28:22,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 777 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 20:28:22,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:22,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-30 20:28:22,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:22,824 INFO L130 PetriNetUnfolder]: 1611/2320 cut-off events. [2023-08-30 20:28:22,824 INFO L131 PetriNetUnfolder]: For 8614/8614 co-relation queries the response was YES. [2023-08-30 20:28:22,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10748 conditions, 2320 events. 1611/2320 cut-off events. For 8614/8614 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10623 event pairs, 217 based on Foata normal form. 16/2335 useless extension candidates. Maximal degree in co-relation 10713. Up to 770 conditions per place. [2023-08-30 20:28:22,844 INFO L137 encePairwiseOnDemand]: 263/274 looper letters, 81 selfloop transitions, 54 changer transitions 0/136 dead transitions. [2023-08-30 20:28:22,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 136 transitions, 1287 flow [2023-08-30 20:28:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:28:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:28:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1092 transitions. [2023-08-30 20:28:22,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44282238442822386 [2023-08-30 20:28:22,848 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1092 transitions. [2023-08-30 20:28:22,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1092 transitions. [2023-08-30 20:28:22,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:22,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1092 transitions. [2023-08-30 20:28:22,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.33333333333333) internal successors, (1092), 9 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states 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 20:28:22,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states 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 20:28:22,855 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states 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 20:28:22,855 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 777 flow. Second operand 9 states and 1092 transitions. [2023-08-30 20:28:22,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 136 transitions, 1287 flow [2023-08-30 20:28:22,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 136 transitions, 1262 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-30 20:28:22,894 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 1016 flow [2023-08-30 20:28:22,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2023-08-30 20:28:22,895 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2023-08-30 20:28:22,895 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 1016 flow [2023-08-30 20:28:22,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 20:28:22,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:22,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:22,907 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 20:28:23,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:23,102 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:23,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:23,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1413007916, now seen corresponding path program 5 times [2023-08-30 20:28:23,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:23,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143424128] [2023-08-30 20:28:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:23,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:23,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:23,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143424128] [2023-08-30 20:28:23,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143424128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:23,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355687017] [2023-08-30 20:28:23,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:28:23,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:23,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:23,233 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 20:28:23,257 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 20:28:23,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:28:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:28:23,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:28:23,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:23,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:23,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355687017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:28:23,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:28:23,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-30 20:28:23,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285990011] [2023-08-30 20:28:23,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:28:23,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:28:23,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:23,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:28:23,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:28:23,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 274 [2023-08-30 20:28:23,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 1016 flow. Second operand has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 20:28:23,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:23,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 274 [2023-08-30 20:28:23,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:24,380 INFO L130 PetriNetUnfolder]: 1887/2767 cut-off events. [2023-08-30 20:28:24,381 INFO L131 PetriNetUnfolder]: For 15862/15862 co-relation queries the response was YES. [2023-08-30 20:28:24,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14436 conditions, 2767 events. 1887/2767 cut-off events. For 15862/15862 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12397 event pairs, 30 based on Foata normal form. 14/2780 useless extension candidates. Maximal degree in co-relation 14396. Up to 727 conditions per place. [2023-08-30 20:28:24,402 INFO L137 encePairwiseOnDemand]: 263/274 looper letters, 144 selfloop transitions, 160 changer transitions 0/304 dead transitions. [2023-08-30 20:28:24,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 304 transitions, 3651 flow [2023-08-30 20:28:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:28:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:28:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2447 transitions. [2023-08-30 20:28:24,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42526937782412233 [2023-08-30 20:28:24,408 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2447 transitions. [2023-08-30 20:28:24,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2447 transitions. [2023-08-30 20:28:24,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:24,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2447 transitions. [2023-08-30 20:28:24,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 116.52380952380952) internal successors, (2447), 21 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states 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 20:28:24,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 274.0) internal successors, (6028), 22 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states 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 20:28:24,423 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 274.0) internal successors, (6028), 22 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states 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 20:28:24,423 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 1016 flow. Second operand 21 states and 2447 transitions. [2023-08-30 20:28:24,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 304 transitions, 3651 flow [2023-08-30 20:28:24,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 304 transitions, 3553 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 20:28:24,491 INFO L231 Difference]: Finished difference. Result has 98 places, 199 transitions, 2868 flow [2023-08-30 20:28:24,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2868, PETRI_PLACES=98, PETRI_TRANSITIONS=199} [2023-08-30 20:28:24,492 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 66 predicate places. [2023-08-30 20:28:24,492 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 199 transitions, 2868 flow [2023-08-30 20:28:24,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 20:28:24,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:24,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:24,501 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 20:28:24,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:24,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:24,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:24,699 INFO L85 PathProgramCache]: Analyzing trace with hash 533701012, now seen corresponding path program 6 times [2023-08-30 20:28:24,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:24,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164343767] [2023-08-30 20:28:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:24,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:24,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:24,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164343767] [2023-08-30 20:28:24,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164343767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:24,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618511767] [2023-08-30 20:28:24,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:28:24,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:24,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:24,825 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 20:28:24,827 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 20:28:24,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:28:24,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:28:24,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:28:24,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:25,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:25,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618511767] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:25,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:28:25,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-08-30 20:28:25,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078641693] [2023-08-30 20:28:25,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:28:25,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:28:25,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:28:25,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:28:25,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-08-30 20:28:25,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 199 transitions, 2868 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 20:28:25,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:25,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-08-30 20:28:25,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:25,656 INFO L130 PetriNetUnfolder]: 1846/2692 cut-off events. [2023-08-30 20:28:25,657 INFO L131 PetriNetUnfolder]: For 20393/20393 co-relation queries the response was YES. [2023-08-30 20:28:25,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15823 conditions, 2692 events. 1846/2692 cut-off events. For 20393/20393 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11980 event pairs, 176 based on Foata normal form. 14/2705 useless extension candidates. Maximal degree in co-relation 15775. Up to 764 conditions per place. [2023-08-30 20:28:25,683 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 75 selfloop transitions, 152 changer transitions 0/236 dead transitions. [2023-08-30 20:28:25,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 236 transitions, 3478 flow [2023-08-30 20:28:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:28:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:28:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 962 transitions. [2023-08-30 20:28:25,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43886861313868614 [2023-08-30 20:28:25,686 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 962 transitions. [2023-08-30 20:28:25,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 962 transitions. [2023-08-30 20:28:25,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:25,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 962 transitions. [2023-08-30 20:28:25,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.25) internal successors, (962), 8 states have internal predecessors, (962), 0 states have call successors, (0), 0 states 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 20:28:25,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 20:28:25,692 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 20:28:25,692 INFO L175 Difference]: Start difference. First operand has 98 places, 199 transitions, 2868 flow. Second operand 8 states and 962 transitions. [2023-08-30 20:28:25,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 236 transitions, 3478 flow [2023-08-30 20:28:25,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 236 transitions, 3249 flow, removed 77 selfloop flow, removed 3 redundant places. [2023-08-30 20:28:25,874 INFO L231 Difference]: Finished difference. Result has 105 places, 202 transitions, 3194 flow [2023-08-30 20:28:25,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3194, PETRI_PLACES=105, PETRI_TRANSITIONS=202} [2023-08-30 20:28:25,876 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2023-08-30 20:28:25,876 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 202 transitions, 3194 flow [2023-08-30 20:28:25,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 20:28:25,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:25,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:25,884 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 20:28:26,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:26,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:26,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:26,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1990448776, now seen corresponding path program 1 times [2023-08-30 20:28:26,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:26,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332190988] [2023-08-30 20:28:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:26,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:26,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:26,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332190988] [2023-08-30 20:28:26,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332190988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:26,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084660850] [2023-08-30 20:28:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:26,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:26,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:26,173 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 20:28:26,197 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 20:28:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:26,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:28:26,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:26,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:26,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084660850] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:26,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:28:26,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-30 20:28:26,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861711648] [2023-08-30 20:28:26,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:28:26,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:28:26,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:26,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:28:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 20:28:26,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 274 [2023-08-30 20:28:26,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 202 transitions, 3194 flow. Second operand has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states 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 20:28:26,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:26,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 274 [2023-08-30 20:28:26,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:26,783 INFO L130 PetriNetUnfolder]: 1718/2489 cut-off events. [2023-08-30 20:28:26,783 INFO L131 PetriNetUnfolder]: For 26288/26611 co-relation queries the response was YES. [2023-08-30 20:28:26,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15963 conditions, 2489 events. 1718/2489 cut-off events. For 26288/26611 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11148 event pairs, 505 based on Foata normal form. 320/2739 useless extension candidates. Maximal degree in co-relation 15912. Up to 1920 conditions per place. [2023-08-30 20:28:26,805 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 243 selfloop transitions, 13 changer transitions 0/275 dead transitions. [2023-08-30 20:28:26,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 275 transitions, 4786 flow [2023-08-30 20:28:26,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:28:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:28:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 623 transitions. [2023-08-30 20:28:26,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45474452554744527 [2023-08-30 20:28:26,808 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 623 transitions. [2023-08-30 20:28:26,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 623 transitions. [2023-08-30 20:28:26,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:26,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 623 transitions. [2023-08-30 20:28:26,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 20:28:26,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 20:28:26,812 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states 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 20:28:26,812 INFO L175 Difference]: Start difference. First operand has 105 places, 202 transitions, 3194 flow. Second operand 5 states and 623 transitions. [2023-08-30 20:28:26,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 275 transitions, 4786 flow [2023-08-30 20:28:26,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 275 transitions, 4615 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 20:28:26,914 INFO L231 Difference]: Finished difference. Result has 105 places, 203 transitions, 3110 flow [2023-08-30 20:28:26,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3110, PETRI_PLACES=105, PETRI_TRANSITIONS=203} [2023-08-30 20:28:26,915 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2023-08-30 20:28:26,915 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 203 transitions, 3110 flow [2023-08-30 20:28:26,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states 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 20:28:26,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:26,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:26,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 20:28:27,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:27,121 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:27,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:27,122 INFO L85 PathProgramCache]: Analyzing trace with hash 3263289, now seen corresponding path program 1 times [2023-08-30 20:28:27,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:27,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835146547] [2023-08-30 20:28:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:27,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:27,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835146547] [2023-08-30 20:28:27,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835146547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173694829] [2023-08-30 20:28:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:27,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:27,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:27,597 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 20:28:27,624 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 20:28:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 20:28:27,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:27,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:28:27,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:28:27,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:28:27,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 20:28:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:27,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:28,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173694829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:28:28,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:28:28,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 5] total 15 [2023-08-30 20:28:28,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574068662] [2023-08-30 20:28:28,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:28:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:28:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:28:28,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:28:28,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 274 [2023-08-30 20:28:28,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 203 transitions, 3110 flow. Second operand has 17 states, 17 states have (on average 107.52941176470588) internal successors, (1828), 17 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 20:28:28,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:28,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 274 [2023-08-30 20:28:28,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:29,345 INFO L130 PetriNetUnfolder]: 2808/4087 cut-off events. [2023-08-30 20:28:29,345 INFO L131 PetriNetUnfolder]: For 35184/35377 co-relation queries the response was YES. [2023-08-30 20:28:29,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25510 conditions, 4087 events. 2808/4087 cut-off events. For 35184/35377 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19427 event pairs, 415 based on Foata normal form. 167/4232 useless extension candidates. Maximal degree in co-relation 25459. Up to 2601 conditions per place. [2023-08-30 20:28:29,429 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 304 selfloop transitions, 124 changer transitions 1/443 dead transitions. [2023-08-30 20:28:29,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 443 transitions, 6977 flow [2023-08-30 20:28:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:28:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:28:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1504 transitions. [2023-08-30 20:28:29,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42223469960696236 [2023-08-30 20:28:29,436 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1504 transitions. [2023-08-30 20:28:29,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1504 transitions. [2023-08-30 20:28:29,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:29,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1504 transitions. [2023-08-30 20:28:29,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.6923076923077) internal successors, (1504), 13 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 20:28:29,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 20:28:29,458 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 20:28:29,458 INFO L175 Difference]: Start difference. First operand has 105 places, 203 transitions, 3110 flow. Second operand 13 states and 1504 transitions. [2023-08-30 20:28:29,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 443 transitions, 6977 flow [2023-08-30 20:28:29,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 443 transitions, 6940 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 20:28:29,668 INFO L231 Difference]: Finished difference. Result has 122 places, 295 transitions, 5023 flow [2023-08-30 20:28:29,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5023, PETRI_PLACES=122, PETRI_TRANSITIONS=295} [2023-08-30 20:28:29,669 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2023-08-30 20:28:29,669 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 295 transitions, 5023 flow [2023-08-30 20:28:29,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.52941176470588) internal successors, (1828), 17 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states 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 20:28:29,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:29,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:29,682 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 20:28:29,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 20:28:29,871 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:29,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1941319685, now seen corresponding path program 1 times [2023-08-30 20:28:29,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:29,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124275340] [2023-08-30 20:28:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:29,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:30,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:30,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124275340] [2023-08-30 20:28:30,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124275340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:30,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667072787] [2023-08-30 20:28:30,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:30,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:30,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:30,496 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 20:28:30,521 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 20:28:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:30,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 20:28:30,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:30,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:28:30,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-08-30 20:28:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:31,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:31,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:28:31,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:28:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:31,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667072787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:28:31,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:28:31,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2023-08-30 20:28:31,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467014298] [2023-08-30 20:28:31,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:28:31,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:28:31,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:28:31,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-08-30 20:28:32,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-08-30 20:28:32,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 295 transitions, 5023 flow. Second operand has 28 states, 28 states have (on average 97.17857142857143) internal successors, (2721), 28 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states 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 20:28:32,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:32,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-08-30 20:28:32,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:35,786 INFO L130 PetriNetUnfolder]: 5451/8012 cut-off events. [2023-08-30 20:28:35,787 INFO L131 PetriNetUnfolder]: For 85174/85174 co-relation queries the response was YES. [2023-08-30 20:28:35,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54672 conditions, 8012 events. 5451/8012 cut-off events. For 85174/85174 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42715 event pairs, 420 based on Foata normal form. 4/8014 useless extension candidates. Maximal degree in co-relation 53139. Up to 4552 conditions per place. [2023-08-30 20:28:35,866 INFO L137 encePairwiseOnDemand]: 259/274 looper letters, 517 selfloop transitions, 375 changer transitions 9/901 dead transitions. [2023-08-30 20:28:35,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 901 transitions, 15005 flow [2023-08-30 20:28:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 20:28:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 20:28:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3750 transitions. [2023-08-30 20:28:35,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38017031630170317 [2023-08-30 20:28:35,880 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3750 transitions. [2023-08-30 20:28:35,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3750 transitions. [2023-08-30 20:28:35,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:35,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3750 transitions. [2023-08-30 20:28:35,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 104.16666666666667) internal successors, (3750), 36 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 20:28:35,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 274.0) internal successors, (10138), 37 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states 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 20:28:35,902 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 274.0) internal successors, (10138), 37 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states 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 20:28:35,903 INFO L175 Difference]: Start difference. First operand has 122 places, 295 transitions, 5023 flow. Second operand 36 states and 3750 transitions. [2023-08-30 20:28:35,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 901 transitions, 15005 flow [2023-08-30 20:28:36,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 901 transitions, 14823 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-08-30 20:28:36,469 INFO L231 Difference]: Finished difference. Result has 170 places, 603 transitions, 11912 flow [2023-08-30 20:28:36,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11912, PETRI_PLACES=170, PETRI_TRANSITIONS=603} [2023-08-30 20:28:36,470 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 138 predicate places. [2023-08-30 20:28:36,470 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 603 transitions, 11912 flow [2023-08-30 20:28:36,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 97.17857142857143) internal successors, (2721), 28 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states 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 20:28:36,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:36,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:36,483 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 20:28:36,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 20:28:36,677 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:36,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:36,678 INFO L85 PathProgramCache]: Analyzing trace with hash 246589533, now seen corresponding path program 2 times [2023-08-30 20:28:36,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:36,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158866164] [2023-08-30 20:28:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:36,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:37,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:37,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158866164] [2023-08-30 20:28:37,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158866164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:37,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729815346] [2023-08-30 20:28:37,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:28:37,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:37,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:37,065 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 20:28:37,076 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 20:28:37,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:28:37,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:28:37,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 20:28:37,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:37,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 20:28:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:37,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:37,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:28:37,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-08-30 20:28:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:28:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729815346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:28:37,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:28:37,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-30 20:28:37,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390308896] [2023-08-30 20:28:37,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:28:37,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:28:37,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:37,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:28:37,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:28:37,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-08-30 20:28:37,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 603 transitions, 11912 flow. Second operand has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states 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 20:28:37,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:37,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-08-30 20:28:37,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:39,525 INFO L130 PetriNetUnfolder]: 7193/10612 cut-off events. [2023-08-30 20:28:39,526 INFO L131 PetriNetUnfolder]: For 168243/168713 co-relation queries the response was YES. [2023-08-30 20:28:39,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82501 conditions, 10612 events. 7193/10612 cut-off events. For 168243/168713 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 61372 event pairs, 786 based on Foata normal form. 354/10876 useless extension candidates. Maximal degree in co-relation 82293. Up to 6266 conditions per place. [2023-08-30 20:28:39,637 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 511 selfloop transitions, 368 changer transitions 1/905 dead transitions. [2023-08-30 20:28:39,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 905 transitions, 18562 flow [2023-08-30 20:28:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:28:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:28:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1377 transitions. [2023-08-30 20:28:39,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568679495686795 [2023-08-30 20:28:39,640 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1377 transitions. [2023-08-30 20:28:39,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1377 transitions. [2023-08-30 20:28:39,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:39,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1377 transitions. [2023-08-30 20:28:39,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 125.18181818181819) internal successors, (1377), 11 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 20:28:39,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 20:28:39,646 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 20:28:39,647 INFO L175 Difference]: Start difference. First operand has 170 places, 603 transitions, 11912 flow. Second operand 11 states and 1377 transitions. [2023-08-30 20:28:39,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 905 transitions, 18562 flow [2023-08-30 20:28:40,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 905 transitions, 18110 flow, removed 225 selfloop flow, removed 1 redundant places. [2023-08-30 20:28:40,880 INFO L231 Difference]: Finished difference. Result has 185 places, 747 transitions, 15579 flow [2023-08-30 20:28:40,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=11598, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15579, PETRI_PLACES=185, PETRI_TRANSITIONS=747} [2023-08-30 20:28:40,881 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 153 predicate places. [2023-08-30 20:28:40,881 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 747 transitions, 15579 flow [2023-08-30 20:28:40,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states 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 20:28:40,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:40,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:40,889 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 20:28:41,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 20:28:41,087 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:41,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:41,088 INFO L85 PathProgramCache]: Analyzing trace with hash 818684429, now seen corresponding path program 2 times [2023-08-30 20:28:41,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:41,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694690263] [2023-08-30 20:28:41,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:41,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:42,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:42,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694690263] [2023-08-30 20:28:42,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694690263] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:42,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202678337] [2023-08-30 20:28:42,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:28:42,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:42,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:42,040 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 20:28:42,042 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 20:28:42,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:28:42,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:28:42,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 20:28:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:42,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:28:42,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-08-30 20:28:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:42,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:42,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:28:42,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:28:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:42,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202678337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:28:42,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:28:42,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-30 20:28:42,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783847291] [2023-08-30 20:28:42,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:28:42,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 20:28:42,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:42,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 20:28:42,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2023-08-30 20:28:43,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 274 [2023-08-30 20:28:43,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 747 transitions, 15579 flow. Second operand has 31 states, 31 states have (on average 90.03225806451613) internal successors, (2791), 31 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states 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 20:28:43,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:43,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 274 [2023-08-30 20:28:43,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:28:50,744 INFO L130 PetriNetUnfolder]: 12880/19067 cut-off events. [2023-08-30 20:28:50,744 INFO L131 PetriNetUnfolder]: For 331470/331470 co-relation queries the response was YES. [2023-08-30 20:28:50,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154945 conditions, 19067 events. 12880/19067 cut-off events. For 331470/331470 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 119864 event pairs, 1424 based on Foata normal form. 9/19076 useless extension candidates. Maximal degree in co-relation 154692. Up to 9189 conditions per place. [2023-08-30 20:28:50,968 INFO L137 encePairwiseOnDemand]: 259/274 looper letters, 760 selfloop transitions, 1216 changer transitions 12/1988 dead transitions. [2023-08-30 20:28:50,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1988 transitions, 39870 flow [2023-08-30 20:28:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-30 20:28:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-30 20:28:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 7303 transitions. [2023-08-30 20:28:50,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507011140991164 [2023-08-30 20:28:50,979 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 7303 transitions. [2023-08-30 20:28:50,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 7303 transitions. [2023-08-30 20:28:50,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:28:50,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 7303 transitions. [2023-08-30 20:28:50,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 96.09210526315789) internal successors, (7303), 76 states have internal predecessors, (7303), 0 states have call successors, (0), 0 states 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 20:28:51,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 274.0) internal successors, (21098), 77 states have internal predecessors, (21098), 0 states have call successors, (0), 0 states 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 20:28:51,178 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 274.0) internal successors, (21098), 77 states have internal predecessors, (21098), 0 states have call successors, (0), 0 states 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 20:28:51,184 INFO L175 Difference]: Start difference. First operand has 185 places, 747 transitions, 15579 flow. Second operand 76 states and 7303 transitions. [2023-08-30 20:28:51,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1988 transitions, 39870 flow [2023-08-30 20:28:53,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1988 transitions, 38677 flow, removed 403 selfloop flow, removed 2 redundant places. [2023-08-30 20:28:53,852 INFO L231 Difference]: Finished difference. Result has 289 places, 1566 transitions, 35700 flow [2023-08-30 20:28:53,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=15053, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=35700, PETRI_PLACES=289, PETRI_TRANSITIONS=1566} [2023-08-30 20:28:53,853 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 257 predicate places. [2023-08-30 20:28:53,853 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 1566 transitions, 35700 flow [2023-08-30 20:28:53,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 90.03225806451613) internal successors, (2791), 31 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states 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 20:28:53,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:53,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:53,862 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 20:28:54,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 20:28:54,059 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:28:54,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash 665140195, now seen corresponding path program 3 times [2023-08-30 20:28:54,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:54,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185924124] [2023-08-30 20:28:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:54,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:54,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185924124] [2023-08-30 20:28:54,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185924124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:54,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6752308] [2023-08-30 20:28:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:28:54,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:54,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:54,795 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 20:28:54,797 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 20:28:54,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:28:54,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:28:54,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 20:28:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:55,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:28:55,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:28:55,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:28:55,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-08-30 20:28:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:55,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:55,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:28:55,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2023-08-30 20:28:55,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-08-30 20:28:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:55,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6752308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:28:55,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:28:55,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-08-30 20:28:55,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066048405] [2023-08-30 20:28:55,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:28:55,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 20:28:55,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:55,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 20:28:56,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=987, Unknown=4, NotChecked=0, Total=1122 [2023-08-30 20:28:57,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 274 [2023-08-30 20:28:57,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 1566 transitions, 35700 flow. Second operand has 34 states, 34 states have (on average 70.79411764705883) internal successors, (2407), 34 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states 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 20:28:57,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:57,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 274 [2023-08-30 20:28:57,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:29:09,157 INFO L130 PetriNetUnfolder]: 16411/24255 cut-off events. [2023-08-30 20:29:09,158 INFO L131 PetriNetUnfolder]: For 522053/522053 co-relation queries the response was YES. [2023-08-30 20:29:09,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221910 conditions, 24255 events. 16411/24255 cut-off events. For 522053/522053 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 157504 event pairs, 1220 based on Foata normal form. 6/24261 useless extension candidates. Maximal degree in co-relation 221466. Up to 10730 conditions per place. [2023-08-30 20:29:09,513 INFO L137 encePairwiseOnDemand]: 257/274 looper letters, 745 selfloop transitions, 1855 changer transitions 12/2612 dead transitions. [2023-08-30 20:29:09,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 2612 transitions, 58363 flow [2023-08-30 20:29:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 20:29:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 20:29:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5035 transitions. [2023-08-30 20:29:09,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2871236313868613 [2023-08-30 20:29:09,520 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5035 transitions. [2023-08-30 20:29:09,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5035 transitions. [2023-08-30 20:29:09,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:29:09,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5035 transitions. [2023-08-30 20:29:09,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 78.671875) internal successors, (5035), 64 states have internal predecessors, (5035), 0 states have call successors, (0), 0 states 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 20:29:09,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 274.0) internal successors, (17810), 65 states have internal predecessors, (17810), 0 states have call successors, (0), 0 states 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 20:29:09,542 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 274.0) internal successors, (17810), 65 states have internal predecessors, (17810), 0 states have call successors, (0), 0 states 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 20:29:09,542 INFO L175 Difference]: Start difference. First operand has 289 places, 1566 transitions, 35700 flow. Second operand 64 states and 5035 transitions. [2023-08-30 20:29:09,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 2612 transitions, 58363 flow [2023-08-30 20:29:18,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 2612 transitions, 56308 flow, removed 950 selfloop flow, removed 5 redundant places. [2023-08-30 20:29:18,242 INFO L231 Difference]: Finished difference. Result has 377 places, 2234 transitions, 55044 flow [2023-08-30 20:29:18,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=34171, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=55044, PETRI_PLACES=377, PETRI_TRANSITIONS=2234} [2023-08-30 20:29:18,243 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 345 predicate places. [2023-08-30 20:29:18,244 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 2234 transitions, 55044 flow [2023-08-30 20:29:18,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 70.79411764705883) internal successors, (2407), 34 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states 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 20:29:18,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:29:18,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:29:18,252 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 20:29:18,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 20:29:18,450 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:29:18,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:29:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1207527799, now seen corresponding path program 3 times [2023-08-30 20:29:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:29:18,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334194505] [2023-08-30 20:29:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:29:18,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:29:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:29:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:29:18,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:29:18,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334194505] [2023-08-30 20:29:18,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334194505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:29:18,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200856043] [2023-08-30 20:29:18,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:29:18,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:29:18,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:29:18,861 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 20:29:18,863 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 20:29:18,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:29:18,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:29:18,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 20:29:18,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:29:19,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:29:19,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:29:19,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 20:29:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:29:19,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:29:19,212 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_658 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_658) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))))) is different from false [2023-08-30 20:29:19,217 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_658 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_658) c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2023-08-30 20:29:19,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:29:19,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2023-08-30 20:29:19,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-08-30 20:29:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-30 20:29:19,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200856043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:29:19,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:29:19,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-08-30 20:29:19,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203711450] [2023-08-30 20:29:19,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:29:19,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:29:19,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:29:19,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:29:19,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=311, Unknown=2, NotChecked=74, Total=462 [2023-08-30 20:29:19,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-08-30 20:29:19,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 2234 transitions, 55044 flow. Second operand has 22 states, 22 states have (on average 97.18181818181819) internal successors, (2138), 22 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states 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 20:29:19,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:29:19,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-08-30 20:29:19,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:29:30,731 INFO L130 PetriNetUnfolder]: 16753/24793 cut-off events. [2023-08-30 20:29:30,732 INFO L131 PetriNetUnfolder]: For 728939/729671 co-relation queries the response was YES. [2023-08-30 20:29:31,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250507 conditions, 24793 events. 16753/24793 cut-off events. For 728939/729671 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 163375 event pairs, 1713 based on Foata normal form. 352/24903 useless extension candidates. Maximal degree in co-relation 250006. Up to 14651 conditions per place. [2023-08-30 20:29:31,393 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 1214 selfloop transitions, 1178 changer transitions 2/2449 dead transitions. [2023-08-30 20:29:31,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2449 transitions, 63541 flow [2023-08-30 20:29:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:29:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:29:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1402 transitions. [2023-08-30 20:29:31,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935991016282987 [2023-08-30 20:29:31,396 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1402 transitions. [2023-08-30 20:29:31,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1402 transitions. [2023-08-30 20:29:31,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:29:31,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1402 transitions. [2023-08-30 20:29:31,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.84615384615384) internal successors, (1402), 13 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states 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 20:29:31,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 20:29:31,401 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 20:29:31,401 INFO L175 Difference]: Start difference. First operand has 377 places, 2234 transitions, 55044 flow. Second operand 13 states and 1402 transitions. [2023-08-30 20:29:31,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2449 transitions, 63541 flow [2023-08-30 20:29:47,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 2449 transitions, 61866 flow, removed 816 selfloop flow, removed 5 redundant places. [2023-08-30 20:29:47,184 INFO L231 Difference]: Finished difference. Result has 390 places, 2316 transitions, 58068 flow [2023-08-30 20:29:47,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=53511, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1087, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=58068, PETRI_PLACES=390, PETRI_TRANSITIONS=2316} [2023-08-30 20:29:47,186 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 358 predicate places. [2023-08-30 20:29:47,186 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 2316 transitions, 58068 flow [2023-08-30 20:29:47,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.18181818181819) internal successors, (2138), 22 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states 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 20:29:47,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:29:47,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:29:47,193 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 20:29:47,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 20:29:47,392 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:29:47,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:29:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1758949043, now seen corresponding path program 4 times [2023-08-30 20:29:47,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:29:47,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129715479] [2023-08-30 20:29:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:29:47,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:29:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:29:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:29:47,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:29:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129715479] [2023-08-30 20:29:47,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129715479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:29:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213992428] [2023-08-30 20:29:47,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:29:47,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:29:47,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:29:47,724 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 20:29:47,729 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 20:29:47,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:29:47,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:29:47,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 20:29:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:29:47,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 20:29:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:29:47,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:29:47,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:29:47,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:29:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:29:48,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213992428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:29:48,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:29:48,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-30 20:29:48,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887119728] [2023-08-30 20:29:48,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:29:48,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:29:48,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:29:48,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:29:48,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:29:48,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-08-30 20:29:48,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 2316 transitions, 58068 flow. Second operand has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states 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 20:29:48,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:29:48,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-08-30 20:29:48,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:30:01,640 INFO L130 PetriNetUnfolder]: 19717/29132 cut-off events. [2023-08-30 20:30:01,640 INFO L131 PetriNetUnfolder]: For 933011/934114 co-relation queries the response was YES. [2023-08-30 20:30:02,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298065 conditions, 29132 events. 19717/29132 cut-off events. For 933011/934114 co-relation queries the response was YES. Maximal size of possible extension queue 1536. Compared 196633 event pairs, 4793 based on Foata normal form. 558/29342 useless extension candidates. Maximal degree in co-relation 297513. Up to 23691 conditions per place. [2023-08-30 20:30:02,334 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 1931 selfloop transitions, 805 changer transitions 1/2792 dead transitions. [2023-08-30 20:30:02,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 2792 transitions, 74500 flow [2023-08-30 20:30:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:30:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:30:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1370 transitions. [2023-08-30 20:30:02,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-30 20:30:02,336 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1370 transitions. [2023-08-30 20:30:02,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1370 transitions. [2023-08-30 20:30:02,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:30:02,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1370 transitions. [2023-08-30 20:30:02,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 124.54545454545455) internal successors, (1370), 11 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states 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 20:30:02,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 20:30:02,339 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 20:30:02,339 INFO L175 Difference]: Start difference. First operand has 390 places, 2316 transitions, 58068 flow. Second operand 11 states and 1370 transitions. [2023-08-30 20:30:02,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 2792 transitions, 74500 flow [2023-08-30 20:30:22,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 2792 transitions, 73290 flow, removed 77 selfloop flow, removed 3 redundant places. [2023-08-30 20:30:22,354 INFO L231 Difference]: Finished difference. Result has 403 places, 2602 transitions, 67072 flow [2023-08-30 20:30:22,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=57003, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=67072, PETRI_PLACES=403, PETRI_TRANSITIONS=2602} [2023-08-30 20:30:22,357 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 371 predicate places. [2023-08-30 20:30:22,357 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 2602 transitions, 67072 flow [2023-08-30 20:30:22,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states 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 20:30:22,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:30:22,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:30:22,363 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 20:30:22,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:30:22,563 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:30:22,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:30:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash -209660607, now seen corresponding path program 5 times [2023-08-30 20:30:22,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:30:22,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802860437] [2023-08-30 20:30:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:30:22,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:30:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:30:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:30:22,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:30:22,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802860437] [2023-08-30 20:30:22,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802860437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:30:22,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665555967] [2023-08-30 20:30:22,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:30:22,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:30:22,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:30:22,885 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 20:30:22,892 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 20:30:23,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:30:23,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:30:23,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 20:30:23,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:30:23,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-08-30 20:30:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:30:23,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:30:23,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:30:23,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:30:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:30:23,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665555967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:30:23,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:30:23,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2023-08-30 20:30:23,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615509245] [2023-08-30 20:30:23,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:30:23,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:30:23,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:30:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:30:23,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:30:23,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-08-30 20:30:23,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 2602 transitions, 67072 flow. Second operand has 14 states, 14 states have (on average 114.85714285714286) internal successors, (1608), 14 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 20:30:23,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:30:23,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-08-30 20:30:23,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:30:37,885 INFO L130 PetriNetUnfolder]: 20363/30059 cut-off events. [2023-08-30 20:30:37,885 INFO L131 PetriNetUnfolder]: For 975206/976288 co-relation queries the response was YES. [2023-08-30 20:30:38,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314847 conditions, 30059 events. 20363/30059 cut-off events. For 975206/976288 co-relation queries the response was YES. Maximal size of possible extension queue 1574. Compared 203597 event pairs, 5544 based on Foata normal form. 574/30242 useless extension candidates. Maximal degree in co-relation 314280. Up to 27584 conditions per place. [2023-08-30 20:30:38,765 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 2195 selfloop transitions, 580 changer transitions 1/2831 dead transitions. [2023-08-30 20:30:38,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 2831 transitions, 77135 flow [2023-08-30 20:30:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:30:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:30:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1348 transitions. [2023-08-30 20:30:38,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44724618447246184 [2023-08-30 20:30:38,767 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1348 transitions. [2023-08-30 20:30:38,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1348 transitions. [2023-08-30 20:30:38,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:30:38,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1348 transitions. [2023-08-30 20:30:38,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 122.54545454545455) internal successors, (1348), 11 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states 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 20:30:38,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 20:30:38,770 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 20:30:38,770 INFO L175 Difference]: Start difference. First operand has 403 places, 2602 transitions, 67072 flow. Second operand 11 states and 1348 transitions. [2023-08-30 20:30:38,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 2831 transitions, 77135 flow [2023-08-30 20:31:00,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 2831 transitions, 75959 flow, removed 343 selfloop flow, removed 3 redundant places. [2023-08-30 20:31:00,086 INFO L231 Difference]: Finished difference. Result has 413 places, 2711 transitions, 69927 flow [2023-08-30 20:31:00,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=65896, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2046, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=69927, PETRI_PLACES=413, PETRI_TRANSITIONS=2711} [2023-08-30 20:31:00,088 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 381 predicate places. [2023-08-30 20:31:00,088 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 2711 transitions, 69927 flow [2023-08-30 20:31:00,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 114.85714285714286) internal successors, (1608), 14 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 20:31:00,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:31:00,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:31:00,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 20:31:00,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:31:00,293 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:31:00,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:31:00,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1100337783, now seen corresponding path program 4 times [2023-08-30 20:31:00,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:31:00,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230589704] [2023-08-30 20:31:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:31:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:31:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:31:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:31:00,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:31:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230589704] [2023-08-30 20:31:00,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230589704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:31:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802700111] [2023-08-30 20:31:00,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:31:00,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:31:00,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:31:00,825 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 20:31:00,829 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 20:31:00,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:31:00,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:31:00,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 20:31:00,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:31:01,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:31:01,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-08-30 20:31:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:31:01,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:31:01,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:31:01,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:31:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:31:01,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802700111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:31:01,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:31:01,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 27 [2023-08-30 20:31:01,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214002775] [2023-08-30 20:31:01,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:31:01,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:31:01,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:31:01,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:31:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:31:02,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-08-30 20:31:02,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 2711 transitions, 69927 flow. Second operand has 29 states, 29 states have (on average 97.0) internal successors, (2813), 29 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 20:31:02,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:31:02,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-08-30 20:31:02,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:31:20,989 INFO L130 PetriNetUnfolder]: 22523/33297 cut-off events. [2023-08-30 20:31:20,990 INFO L131 PetriNetUnfolder]: For 1009333/1009333 co-relation queries the response was YES. [2023-08-30 20:31:21,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346535 conditions, 33297 events. 22523/33297 cut-off events. For 1009333/1009333 co-relation queries the response was YES. Maximal size of possible extension queue 1674. Compared 226853 event pairs, 4962 based on Foata normal form. 4/33301 useless extension candidates. Maximal degree in co-relation 345956. Up to 24600 conditions per place. [2023-08-30 20:31:22,013 INFO L137 encePairwiseOnDemand]: 261/274 looper letters, 1754 selfloop transitions, 1436 changer transitions 9/3199 dead transitions. [2023-08-30 20:31:22,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 3199 transitions, 86309 flow [2023-08-30 20:31:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 20:31:22,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 20:31:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4403 transitions. [2023-08-30 20:31:22,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3737056526905449 [2023-08-30 20:31:22,020 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4403 transitions. [2023-08-30 20:31:22,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4403 transitions. [2023-08-30 20:31:22,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:31:22,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4403 transitions. [2023-08-30 20:31:22,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 102.3953488372093) internal successors, (4403), 43 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states 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 20:31:22,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 274.0) internal successors, (12056), 44 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states 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 20:31:22,036 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 274.0) internal successors, (12056), 44 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states 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 20:31:22,036 INFO L175 Difference]: Start difference. First operand has 413 places, 2711 transitions, 69927 flow. Second operand 43 states and 4403 transitions. [2023-08-30 20:31:22,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 3199 transitions, 86309 flow [2023-08-30 20:31:47,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 3199 transitions, 85047 flow, removed 289 selfloop flow, removed 6 redundant places. [2023-08-30 20:31:47,874 INFO L231 Difference]: Finished difference. Result has 463 places, 2999 transitions, 81530 flow [2023-08-30 20:31:47,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=68826, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=81530, PETRI_PLACES=463, PETRI_TRANSITIONS=2999} [2023-08-30 20:31:47,877 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 431 predicate places. [2023-08-30 20:31:47,877 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 2999 transitions, 81530 flow [2023-08-30 20:31:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 97.0) internal successors, (2813), 29 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 20:31:47,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:31:47,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:31:47,886 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 20:31:48,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:31:48,084 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:31:48,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:31:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1925660755, now seen corresponding path program 6 times [2023-08-30 20:31:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:31:48,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758094493] [2023-08-30 20:31:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:31:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:31:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:31:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:31:48,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:31:48,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758094493] [2023-08-30 20:31:48,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758094493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:31:48,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893642012] [2023-08-30 20:31:48,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:31:48,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:31:48,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:31:48,469 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 20:31:48,504 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 20:31:48,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:31:48,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:31:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 20:31:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:31:48,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:31:48,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:31:48,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 20:31:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:31:48,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:31:48,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:31:48,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2023-08-30 20:31:48,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-08-30 20:31:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:31:48,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893642012] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:31:48,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:31:48,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 20:31:48,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607065884] [2023-08-30 20:31:48,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:31:48,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 20:31:48,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:31:48,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 20:31:48,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=407, Unknown=4, NotChecked=0, Total=506 [2023-08-30 20:31:49,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-08-30 20:31:49,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 2999 transitions, 81530 flow. Second operand has 23 states, 23 states have (on average 97.21739130434783) internal successors, (2236), 23 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states 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 20:31:49,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:31:49,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-08-30 20:31:49,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:10,199 INFO L130 PetriNetUnfolder]: 23882/35299 cut-off events. [2023-08-30 20:32:10,200 INFO L131 PetriNetUnfolder]: For 1301011/1302196 co-relation queries the response was YES. [2023-08-30 20:32:11,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386896 conditions, 35299 events. 23882/35299 cut-off events. For 1301011/1302196 co-relation queries the response was YES. Maximal size of possible extension queue 1856. Compared 244923 event pairs, 5438 based on Foata normal form. 625/35543 useless extension candidates. Maximal degree in co-relation 386112. Up to 27997 conditions per place. [2023-08-30 20:32:11,366 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 2342 selfloop transitions, 911 changer transitions 1/3314 dead transitions. [2023-08-30 20:32:11,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 3314 transitions, 95411 flow [2023-08-30 20:32:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:32:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:32:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2023-08-30 20:32:11,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38838199513381993 [2023-08-30 20:32:11,369 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2023-08-30 20:32:11,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2023-08-30 20:32:11,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:11,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2023-08-30 20:32:11,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states 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 20:32:11,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 20:32:11,374 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 20:32:11,374 INFO L175 Difference]: Start difference. First operand has 463 places, 2999 transitions, 81530 flow. Second operand 12 states and 1277 transitions. [2023-08-30 20:32:11,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 3314 transitions, 95411 flow [2023-08-30 20:32:44,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 3314 transitions, 94373 flow, removed 346 selfloop flow, removed 6 redundant places. [2023-08-30 20:32:44,648 INFO L231 Difference]: Finished difference. Result has 474 places, 3162 transitions, 87596 flow [2023-08-30 20:32:44,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=80614, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=774, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=87596, PETRI_PLACES=474, PETRI_TRANSITIONS=3162} [2023-08-30 20:32:44,650 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 442 predicate places. [2023-08-30 20:32:44,650 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 3162 transitions, 87596 flow [2023-08-30 20:32:44,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 97.21739130434783) internal successors, (2236), 23 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states 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 20:32:44,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:44,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:32:44,655 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 20:32:44,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:44,851 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:44,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:44,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1421372669, now seen corresponding path program 5 times [2023-08-30 20:32:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:44,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615149991] [2023-08-30 20:32:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:45,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:45,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615149991] [2023-08-30 20:32:45,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615149991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:45,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991144387] [2023-08-30 20:32:45,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:32:45,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:45,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:45,301 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 20:32:45,303 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 20:32:45,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:32:45,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:45,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 20:32:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:45,703 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:32:45,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:45,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 20:32:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:45,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:45,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:45,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:32:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:46,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991144387] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:46,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:46,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 26 [2023-08-30 20:32:46,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450986599] [2023-08-30 20:32:46,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:46,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:32:46,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:32:46,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-08-30 20:32:46,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 274 [2023-08-30 20:32:46,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 3162 transitions, 87596 flow. Second operand has 28 states, 28 states have (on average 98.07142857142857) internal successors, (2746), 28 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states 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 20:32:46,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:46,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 274 [2023-08-30 20:32:46,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:33:28,931 INFO L130 PetriNetUnfolder]: 40359/61115 cut-off events. [2023-08-30 20:33:28,931 INFO L131 PetriNetUnfolder]: For 2324797/2324797 co-relation queries the response was YES. [2023-08-30 20:33:31,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663920 conditions, 61115 events. 40359/61115 cut-off events. For 2324797/2324797 co-relation queries the response was YES. Maximal size of possible extension queue 3148. Compared 475029 event pairs, 3384 based on Foata normal form. 11/61126 useless extension candidates. Maximal degree in co-relation 663154. Up to 18258 conditions per place. [2023-08-30 20:33:31,455 INFO L137 encePairwiseOnDemand]: 257/274 looper letters, 2631 selfloop transitions, 3595 changer transitions 20/6246 dead transitions. [2023-08-30 20:33:31,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 6246 transitions, 183469 flow [2023-08-30 20:33:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 20:33:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 20:33:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5157 transitions. [2023-08-30 20:33:31,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38410546700431997 [2023-08-30 20:33:31,460 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5157 transitions. [2023-08-30 20:33:31,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5157 transitions. [2023-08-30 20:33:31,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:33:31,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5157 transitions. [2023-08-30 20:33:31,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 105.24489795918367) internal successors, (5157), 49 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states 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 20:33:31,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 274.0) internal successors, (13700), 50 states have internal predecessors, (13700), 0 states have call successors, (0), 0 states 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 20:33:31,477 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 274.0) internal successors, (13700), 50 states have internal predecessors, (13700), 0 states have call successors, (0), 0 states 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 20:33:31,477 INFO L175 Difference]: Start difference. First operand has 474 places, 3162 transitions, 87596 flow. Second operand 49 states and 5157 transitions. [2023-08-30 20:33:31,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 6246 transitions, 183469 flow [2023-08-30 20:34:58,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 6246 transitions, 181650 flow, removed 718 selfloop flow, removed 2 redundant places. [2023-08-30 20:34:58,642 INFO L231 Difference]: Finished difference. Result has 535 places, 5085 transitions, 158215 flow [2023-08-30 20:34:58,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=86634, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1963, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=158215, PETRI_PLACES=535, PETRI_TRANSITIONS=5085} [2023-08-30 20:34:58,645 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 503 predicate places. [2023-08-30 20:34:58,645 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 5085 transitions, 158215 flow [2023-08-30 20:34:58,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.07142857142857) internal successors, (2746), 28 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states 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 20:34:58,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:34:58,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:34:58,650 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 20:34:58,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:58,846 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:34:58,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:34:58,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2024277337, now seen corresponding path program 7 times [2023-08-30 20:34:58,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:34:58,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975695368] [2023-08-30 20:34:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:34:58,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:34:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:34:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:59,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:34:59,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975695368] [2023-08-30 20:34:59,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975695368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:34:59,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826101782] [2023-08-30 20:34:59,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:34:59,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:59,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:34:59,221 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 20:34:59,228 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 20:34:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:34:59,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-30 20:34:59,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:34:59,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:34:59,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:34:59,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:34:59,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:34:59,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:34:59,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 20:34:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:34:59,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:34:59,620 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_928 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset)) c_~res2~0))) is different from false [2023-08-30 20:34:59,676 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_928 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-08-30 20:34:59,684 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_928 (Array Int Int)) (v_ArrVal_927 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_927))) (= (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-08-30 20:34:59,694 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_926 (Array Int Int)) (v_ArrVal_928 (Array Int Int)) (v_ArrVal_927 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_926) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_927))) (= (+ c_~res1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-08-30 20:34:59,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:34:59,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2023-08-30 20:34:59,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10294 treesize of output 9654 [2023-08-30 20:34:59,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2023-08-30 20:34:59,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-30 20:34:59,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2023-08-30 20:34:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 20:34:59,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826101782] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:34:59,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:34:59,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-08-30 20:34:59,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016693979] [2023-08-30 20:34:59,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:34:59,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 20:34:59,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:34:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 20:34:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=379, Unknown=6, NotChecked=172, Total=650 [2023-08-30 20:34:59,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 274 [2023-08-30 20:34:59,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 5085 transitions, 158215 flow. Second operand has 26 states, 26 states have (on average 85.8076923076923) internal successors, (2231), 26 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states 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 20:34:59,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:34:59,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 274 [2023-08-30 20:34:59,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:36:04,472 INFO L130 PetriNetUnfolder]: 41527/63085 cut-off events. [2023-08-30 20:36:04,473 INFO L131 PetriNetUnfolder]: For 2992166/2994921 co-relation queries the response was YES. [2023-08-30 20:36:07,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752504 conditions, 63085 events. 41527/63085 cut-off events. For 2992166/2994921 co-relation queries the response was YES. Maximal size of possible extension queue 3483. Compared 498203 event pairs, 9324 based on Foata normal form. 1361/63803 useless extension candidates. Maximal degree in co-relation 752017. Up to 51793 conditions per place. [2023-08-30 20:36:07,567 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 4116 selfloop transitions, 1364 changer transitions 1/5579 dead transitions. [2023-08-30 20:36:07,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 5579 transitions, 183480 flow [2023-08-30 20:36:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:36:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:36:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1233 transitions. [2023-08-30 20:36:07,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2023-08-30 20:36:07,568 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1233 transitions. [2023-08-30 20:36:07,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1233 transitions. [2023-08-30 20:36:07,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:36:07,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1233 transitions. [2023-08-30 20:36:07,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 94.84615384615384) internal successors, (1233), 13 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states 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 20:36:07,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 20:36:07,573 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 20:36:07,573 INFO L175 Difference]: Start difference. First operand has 535 places, 5085 transitions, 158215 flow. Second operand 13 states and 1233 transitions. [2023-08-30 20:36:07,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 5579 transitions, 183480 flow [2023-08-30 20:38:11,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 5579 transitions, 180336 flow, removed 1169 selfloop flow, removed 24 redundant places. [2023-08-30 20:38:11,857 INFO L231 Difference]: Finished difference. Result has 530 places, 5295 transitions, 167148 flow [2023-08-30 20:38:11,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=155364, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5085, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=167148, PETRI_PLACES=530, PETRI_TRANSITIONS=5295} [2023-08-30 20:38:11,861 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 498 predicate places. [2023-08-30 20:38:11,861 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 5295 transitions, 167148 flow [2023-08-30 20:38:11,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 85.8076923076923) internal successors, (2231), 26 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states 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 20:38:11,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:38:11,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:38:11,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-30 20:38:12,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:12,062 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:38:12,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:38:12,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1171616155, now seen corresponding path program 8 times [2023-08-30 20:38:12,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:38:12,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079108757] [2023-08-30 20:38:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:38:12,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:38:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:38:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:12,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:38:12,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079108757] [2023-08-30 20:38:12,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079108757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:38:12,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265574219] [2023-08-30 20:38:12,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:38:12,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:12,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:38:12,457 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 20:38:12,483 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 20:38:12,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:38:12,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:38:12,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 20:38:12,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:38:12,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:38:12,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:38:12,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 20:38:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:12,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:38:12,853 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_973 (Array Int Int))) (= c_~res2~0 (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_973) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))))) is different from false [2023-08-30 20:38:12,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:38:12,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2023-08-30 20:38:12,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-08-30 20:38:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-30 20:38:12,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265574219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:38:12,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:38:12,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 20:38:12,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119027190] [2023-08-30 20:38:12,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:38:12,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 20:38:12,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:38:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 20:38:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=372, Unknown=2, NotChecked=40, Total=506 [2023-08-30 20:38:13,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-08-30 20:38:13,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 5295 transitions, 167148 flow. Second operand has 23 states, 23 states have (on average 97.17391304347827) internal successors, (2235), 23 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states 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 20:38:13,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:38:13,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-08-30 20:38:13,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:39:27,980 INFO L130 PetriNetUnfolder]: 42324/64214 cut-off events. [2023-08-30 20:39:27,980 INFO L131 PetriNetUnfolder]: For 3020607/3023471 co-relation queries the response was YES. [2023-08-30 20:39:30,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764757 conditions, 64214 events. 42324/64214 cut-off events. For 3020607/3023471 co-relation queries the response was YES. Maximal size of possible extension queue 3564. Compared 507139 event pairs, 10575 based on Foata normal form. 1407/64896 useless extension candidates. Maximal degree in co-relation 763900. Up to 59557 conditions per place. [2023-08-30 20:39:31,116 INFO L137 encePairwiseOnDemand]: 261/274 looper letters, 4533 selfloop transitions, 976 changer transitions 1/5608 dead transitions. [2023-08-30 20:39:31,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 5608 transitions, 186746 flow [2023-08-30 20:39:31,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:39:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:39:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1263 transitions. [2023-08-30 20:39:31,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841240875912409 [2023-08-30 20:39:31,122 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1263 transitions. [2023-08-30 20:39:31,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1263 transitions. [2023-08-30 20:39:31,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:39:31,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1263 transitions. [2023-08-30 20:39:31,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 105.25) internal successors, (1263), 12 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 20:39:31,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 20:39:31,125 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 20:39:31,125 INFO L175 Difference]: Start difference. First operand has 530 places, 5295 transitions, 167148 flow. Second operand 12 states and 1263 transitions. [2023-08-30 20:39:31,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 5608 transitions, 186746 flow [2023-08-30 20:41:31,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 5608 transitions, 185089 flow, removed 598 selfloop flow, removed 4 redundant places. [2023-08-30 20:41:31,859 INFO L231 Difference]: Finished difference. Result has 541 places, 5490 transitions, 174330 flow [2023-08-30 20:41:31,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=165493, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=174330, PETRI_PLACES=541, PETRI_TRANSITIONS=5490} [2023-08-30 20:41:31,863 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 509 predicate places. [2023-08-30 20:41:31,864 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 5490 transitions, 174330 flow [2023-08-30 20:41:31,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 97.17391304347827) internal successors, (2235), 23 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states 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 20:41:31,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:41:31,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:41:31,869 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 20:41:32,065 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,SelfDestructingSolverStorable23 [2023-08-30 20:41:32,065 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:41:32,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:41:32,066 INFO L85 PathProgramCache]: Analyzing trace with hash -983720255, now seen corresponding path program 9 times [2023-08-30 20:41:32,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:41:32,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006691902] [2023-08-30 20:41:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:32,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:41:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:41:32,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:41:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006691902] [2023-08-30 20:41:32,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006691902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:41:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101701032] [2023-08-30 20:41:32,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:41:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:41:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:41:32,449 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 20:41:32,476 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 20:41:32,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:41:32,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:41:32,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 20:41:32,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:41:32,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2023-08-30 20:41:32,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:41:32,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:41:32,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 20:41:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:41:32,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:41:32,770 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1022 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1022) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-08-30 20:41:32,777 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1022 (Array Int Int)) (v_ArrVal_1021 (Array Int Int))) (= (+ c_~res2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1021) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1022) c_~A~0.base) c_~A~0.offset)) c_~res1~0)) is different from false [2023-08-30 20:41:32,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:41:32,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 146 [2023-08-30 20:41:32,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2023-08-30 20:41:32,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-30 20:41:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:41:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101701032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:41:32,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:41:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-08-30 20:41:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129719135] [2023-08-30 20:41:32,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:41:32,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:41:32,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:41:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:41:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=221, Unknown=2, NotChecked=62, Total=342 [2023-08-30 20:41:32,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 274 [2023-08-30 20:41:32,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 5490 transitions, 174330 flow. Second operand has 19 states, 19 states have (on average 94.15789473684211) internal successors, (1789), 19 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states 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 20:41:32,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:41:32,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 274 [2023-08-30 20:41:32,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15