./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.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/chl-chromosome-trans.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 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --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 18:52:23,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:52:23,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:52:23,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:52:23,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:52:23,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:52:23,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:52:23,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:52:23,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:52:23,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:52:23,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:52:23,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:52:23,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:52:23,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:52:23,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:52:23,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:52:23,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:52:23,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:52:23,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:52:23,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:52:23,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:52:23,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:52:23,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:52:23,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:52:23,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:52:23,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:52:23,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:52:23,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:52:23,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:52:23,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:52:23,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:52:23,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:52:23,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:52:23,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:52:23,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:52:23,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:52:23,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:52:23,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:52:23,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:52:23,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:52:23,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:52:23,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:52:24,016 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:52:24,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:52:24,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:52:24,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:52:24,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:52:24,023 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:52:24,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:52:24,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:52:24,024 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:52:24,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:52:24,025 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:52:24,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:52:24,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:52:24,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:52:24,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:52:24,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:52:24,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:52:24,026 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:52:24,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:52:24,027 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:52:24,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:52:24,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:52:24,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:52:24,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:52:24,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:52:24,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:52:24,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:52:24,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:52:24,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:52:24,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:52:24,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:52:24,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:52:24,030 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:52:24,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:52:24,030 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:52:24,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:52:24,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:52:24,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:52:24,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:52:24,349 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:52:24,349 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:52:24,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-30 18:52:25,595 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:52:25,785 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:52:25,786 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-30 18:52:25,791 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65cca61dc/7369a80e63e545a9864f54f2f34abefe/FLAG9965a6569 [2023-08-30 18:52:25,806 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65cca61dc/7369a80e63e545a9864f54f2f34abefe [2023-08-30 18:52:25,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:52:25,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:52:25,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:52:25,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:52:25,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:52:25,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:52:25" (1/1) ... [2023-08-30 18:52:25,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a6f142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:25, skipping insertion in model container [2023-08-30 18:52:25,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:52:25" (1/1) ... [2023-08-30 18:52:25,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:52:25,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:52:25,968 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/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-30 18:52:25,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:52:25,985 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:52:26,006 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/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-30 18:52:26,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:52:26,023 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:52:26,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26 WrapperNode [2023-08-30 18:52:26,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:52:26,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:52:26,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:52:26,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:52:26,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,088 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 277 [2023-08-30 18:52:26,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:52:26,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:52:26,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:52:26,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:52:26,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,143 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:52:26,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:52:26,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:52:26,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:52:26,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (1/1) ... [2023-08-30 18:52:26,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:52:26,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:26,202 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 18:52:26,233 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 18:52:26,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:52:26,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:52:26,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:52:26,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:52:26,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 18:52:26,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 18:52:26,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 18:52:26,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 18:52:26,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 18:52:26,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 18:52:26,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:52:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:52:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:52:26,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:52:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:52:26,252 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 18:52:26,408 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:52:26,410 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:52:26,779 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:52:26,789 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:52:26,789 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 18:52:26,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:52:26 BoogieIcfgContainer [2023-08-30 18:52:26,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:52:26,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:52:26,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:52:26,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:52:26,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:52:25" (1/3) ... [2023-08-30 18:52:26,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f330f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:52:26, skipping insertion in model container [2023-08-30 18:52:26,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:52:26" (2/3) ... [2023-08-30 18:52:26,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f330f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:52:26, skipping insertion in model container [2023-08-30 18:52:26,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:52:26" (3/3) ... [2023-08-30 18:52:26,810 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-08-30 18:52:26,830 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:52:26,839 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:52:26,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:52:26,857 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:52:27,100 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 18:52:27,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 318 transitions, 660 flow [2023-08-30 18:52:27,307 INFO L130 PetriNetUnfolder]: 28/315 cut-off events. [2023-08-30 18:52:27,308 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:52:27,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 315 events. 28/315 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 492 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-08-30 18:52:27,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 300 places, 318 transitions, 660 flow [2023-08-30 18:52:27,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 305 transitions, 628 flow [2023-08-30 18:52:27,327 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:52:27,342 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 305 transitions, 628 flow [2023-08-30 18:52:27,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 305 transitions, 628 flow [2023-08-30 18:52:27,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 305 transitions, 628 flow [2023-08-30 18:52:27,411 INFO L130 PetriNetUnfolder]: 28/305 cut-off events. [2023-08-30 18:52:27,411 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:52:27,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 305 events. 28/305 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 491 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-08-30 18:52:27,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 15390 [2023-08-30 18:52:35,182 INFO L134 LiptonReduction]: Checked pairs total: 14128 [2023-08-30 18:52:35,183 INFO L136 LiptonReduction]: Total number of compositions: 343 [2023-08-30 18:52:35,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:52:35,200 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;@2316d9c4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:52:35,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:52:35,205 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2023-08-30 18:52:35,206 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:52:35,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:35,206 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 18:52:35,207 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 18:52:35,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:35,211 INFO L85 PathProgramCache]: Analyzing trace with hash -153494726, now seen corresponding path program 1 times [2023-08-30 18:52:35,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:35,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650419083] [2023-08-30 18:52:35,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:35,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:35,639 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 18:52:35,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:35,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650419083] [2023-08-30 18:52:35,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650419083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:35,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:52:35,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:52:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234416006] [2023-08-30 18:52:35,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:35,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:52:35,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:35,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:52:35,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:52:35,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 661 [2023-08-30 18:52:35,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:35,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:35,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 661 [2023-08-30 18:52:35,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:35,909 INFO L130 PetriNetUnfolder]: 370/545 cut-off events. [2023-08-30 18:52:35,909 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-30 18:52:35,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 545 events. 370/545 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1531 event pairs, 253 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 936. Up to 543 conditions per place. [2023-08-30 18:52:35,913 INFO L137 encePairwiseOnDemand]: 653/661 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-08-30 18:52:35,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 150 flow [2023-08-30 18:52:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:52:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:52:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2023-08-30 18:52:35,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437720625315179 [2023-08-30 18:52:35,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2023-08-30 18:52:35,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2023-08-30 18:52:35,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:35,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2023-08-30 18:52:35,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:35,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 661.0) internal successors, (2644), 4 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:35,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 661.0) internal successors, (2644), 4 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:35,948 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 868 transitions. [2023-08-30 18:52:35,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 150 flow [2023-08-30 18:52:35,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 18:52:35,953 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 98 flow [2023-08-30 18:52:35,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-08-30 18:52:35,957 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-08-30 18:52:35,957 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 98 flow [2023-08-30 18:52:35,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:35,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:35,958 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, 1] [2023-08-30 18:52:35,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:52:35,959 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 18:52:35,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash 567514681, now seen corresponding path program 1 times [2023-08-30 18:52:35,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:35,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501915787] [2023-08-30 18:52:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:52:36,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:36,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501915787] [2023-08-30 18:52:36,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501915787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299992300] [2023-08-30 18:52:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:36,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:36,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:36,225 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 18:52:36,252 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 18:52:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 18:52:36,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:52:36,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:52:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:52:36,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299992300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:52:36,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:52:36,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-30 18:52:36,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907991541] [2023-08-30 18:52:36,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:52:36,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 18:52:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 18:52:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:52:36,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 661 [2023-08-30 18:52:36,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 274.875) internal successors, (2199), 8 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:36,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:36,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 661 [2023-08-30 18:52:36,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:36,791 INFO L130 PetriNetUnfolder]: 370/554 cut-off events. [2023-08-30 18:52:36,791 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:52:36,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 554 events. 370/554 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1529 event pairs, 253 based on Foata normal form. 6/445 useless extension candidates. Maximal degree in co-relation 1106. Up to 543 conditions per place. [2023-08-30 18:52:36,794 INFO L137 encePairwiseOnDemand]: 654/661 looper letters, 27 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2023-08-30 18:52:36,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 218 flow [2023-08-30 18:52:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:52:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:52:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1677 transitions. [2023-08-30 18:52:36,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228441754916793 [2023-08-30 18:52:36,799 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1677 transitions. [2023-08-30 18:52:36,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1677 transitions. [2023-08-30 18:52:36,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:36,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1677 transitions. [2023-08-30 18:52:36,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 279.5) internal successors, (1677), 6 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:36,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:36,812 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:36,812 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 98 flow. Second operand 6 states and 1677 transitions. [2023-08-30 18:52:36,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 218 flow [2023-08-30 18:52:36,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 42 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:52:36,814 INFO L231 Difference]: Finished difference. Result has 38 places, 42 transitions, 188 flow [2023-08-30 18:52:36,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=38, PETRI_TRANSITIONS=42} [2023-08-30 18:52:36,815 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-30 18:52:36,816 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 42 transitions, 188 flow [2023-08-30 18:52:36,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 274.875) internal successors, (2199), 8 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:36,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:36,817 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:36,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 18:52:37,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:37,032 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 18:52:37,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:37,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1258852288, now seen corresponding path program 2 times [2023-08-30 18:52:37,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:37,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834096199] [2023-08-30 18:52:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:37,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 18:52:37,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:37,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834096199] [2023-08-30 18:52:37,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834096199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:37,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573706051] [2023-08-30 18:52:37,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:52:37,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:37,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:37,255 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 18:52:37,287 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 18:52:37,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:52:37,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:37,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 18:52:37,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:37,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:52:37,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573706051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:37,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:52:37,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-30 18:52:37,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812643368] [2023-08-30 18:52:37,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:37,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:52:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:52:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:52:37,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 661 [2023-08-30 18:52:37,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 42 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:37,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:37,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 661 [2023-08-30 18:52:37,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:37,680 INFO L130 PetriNetUnfolder]: 644/962 cut-off events. [2023-08-30 18:52:37,680 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 18:52:37,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 962 events. 644/962 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3428 event pairs, 253 based on Foata normal form. 14/762 useless extension candidates. Maximal degree in co-relation 1928. Up to 555 conditions per place. [2023-08-30 18:52:37,684 INFO L137 encePairwiseOnDemand]: 657/661 looper letters, 69 selfloop transitions, 3 changer transitions 2/74 dead transitions. [2023-08-30 18:52:37,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 407 flow [2023-08-30 18:52:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:52:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:52:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1199 transitions. [2023-08-30 18:52:37,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45347957639939485 [2023-08-30 18:52:37,688 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1199 transitions. [2023-08-30 18:52:37,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1199 transitions. [2023-08-30 18:52:37,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:37,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1199 transitions. [2023-08-30 18:52:37,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 299.75) internal successors, (1199), 4 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:37,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:37,697 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:37,697 INFO L175 Difference]: Start difference. First operand has 38 places, 42 transitions, 188 flow. Second operand 4 states and 1199 transitions. [2023-08-30 18:52:37,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 74 transitions, 407 flow [2023-08-30 18:52:37,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 74 transitions, 383 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 18:52:37,702 INFO L231 Difference]: Finished difference. Result has 42 places, 44 transitions, 184 flow [2023-08-30 18:52:37,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2023-08-30 18:52:37,704 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2023-08-30 18:52:37,704 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 184 flow [2023-08-30 18:52:37,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:37,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:37,708 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:37,715 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 18:52:37,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 18:52:37,915 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 18:52:37,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:37,915 INFO L85 PathProgramCache]: Analyzing trace with hash 445073096, now seen corresponding path program 3 times [2023-08-30 18:52:37,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:37,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545437748] [2023-08-30 18:52:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:37,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 18:52:38,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:38,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545437748] [2023-08-30 18:52:38,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545437748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:38,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491299300] [2023-08-30 18:52:38,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:52:38,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:38,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:38,103 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 18:52:38,105 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 18:52:38,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 18:52:38,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:38,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 18:52:38,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:38,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:52:38,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491299300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:38,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:52:38,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-30 18:52:38,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127571961] [2023-08-30 18:52:38,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:38,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:52:38,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:52:38,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:52:38,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 661 [2023-08-30 18:52:38,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:38,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:38,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 661 [2023-08-30 18:52:38,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:38,556 INFO L130 PetriNetUnfolder]: 758/1124 cut-off events. [2023-08-30 18:52:38,556 INFO L131 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2023-08-30 18:52:38,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 1124 events. 758/1124 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4232 event pairs, 104 based on Foata normal form. 24/974 useless extension candidates. Maximal degree in co-relation 2598. Up to 775 conditions per place. [2023-08-30 18:52:38,561 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 63 selfloop transitions, 5 changer transitions 1/69 dead transitions. [2023-08-30 18:52:38,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 392 flow [2023-08-30 18:52:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:52:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:52:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1186 transitions. [2023-08-30 18:52:38,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485627836611195 [2023-08-30 18:52:38,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1186 transitions. [2023-08-30 18:52:38,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1186 transitions. [2023-08-30 18:52:38,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:38,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1186 transitions. [2023-08-30 18:52:38,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.5) internal successors, (1186), 4 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:38,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:38,574 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:38,574 INFO L175 Difference]: Start difference. First operand has 42 places, 44 transitions, 184 flow. Second operand 4 states and 1186 transitions. [2023-08-30 18:52:38,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 69 transitions, 392 flow [2023-08-30 18:52:38,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 69 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:52:38,577 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 213 flow [2023-08-30 18:52:38,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-30 18:52:38,578 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-08-30 18:52:38,578 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 213 flow [2023-08-30 18:52:38,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:38,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:38,579 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:38,588 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 18:52:38,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:38,786 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 18:52:38,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash -447520588, now seen corresponding path program 4 times [2023-08-30 18:52:38,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:38,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881420047] [2023-08-30 18:52:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:38,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 18:52:38,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:38,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881420047] [2023-08-30 18:52:38,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881420047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:38,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558450499] [2023-08-30 18:52:38,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:52:38,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:38,976 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 18:52:38,979 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 18:52:39,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:52:39,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:39,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 18:52:39,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 18:52:39,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:52:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 18:52:39,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558450499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:52:39,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:52:39,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-30 18:52:39,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972959922] [2023-08-30 18:52:39,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:52:39,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 18:52:39,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 18:52:39,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-30 18:52:39,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 661 [2023-08-30 18:52:39,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 213 flow. Second operand has 17 states, 17 states have (on average 273.3529411764706) internal successors, (4647), 17 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:39,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:39,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 661 [2023-08-30 18:52:39,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:39,815 INFO L130 PetriNetUnfolder]: 758/1127 cut-off events. [2023-08-30 18:52:39,816 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2023-08-30 18:52:39,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2864 conditions, 1127 events. 758/1127 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3903 event pairs, 525 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 2770. Up to 1113 conditions per place. [2023-08-30 18:52:39,823 INFO L137 encePairwiseOnDemand]: 654/661 looper letters, 31 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2023-08-30 18:52:39,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 329 flow [2023-08-30 18:52:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:52:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:52:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1945 transitions. [2023-08-30 18:52:39,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42035876377782583 [2023-08-30 18:52:39,829 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1945 transitions. [2023-08-30 18:52:39,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1945 transitions. [2023-08-30 18:52:39,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:39,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1945 transitions. [2023-08-30 18:52:39,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 277.85714285714283) internal successors, (1945), 7 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:39,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:39,867 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:39,867 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 213 flow. Second operand 7 states and 1945 transitions. [2023-08-30 18:52:39,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 329 flow [2023-08-30 18:52:39,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:52:39,873 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 278 flow [2023-08-30 18:52:39,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-30 18:52:39,876 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-08-30 18:52:39,876 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 278 flow [2023-08-30 18:52:39,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 273.3529411764706) internal successors, (4647), 17 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:39,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:39,878 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 18:52:39,888 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 18:52:40,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:40,085 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 18:52:40,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:40,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1897962517, now seen corresponding path program 5 times [2023-08-30 18:52:40,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:40,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029654094] [2023-08-30 18:52:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:40,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:52:40,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:40,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029654094] [2023-08-30 18:52:40,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029654094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:40,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:52:40,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:52:40,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151355804] [2023-08-30 18:52:40,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:40,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:52:40,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:52:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:52:40,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 661 [2023-08-30 18:52:40,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:40,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:40,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 661 [2023-08-30 18:52:40,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:40,741 INFO L130 PetriNetUnfolder]: 659/978 cut-off events. [2023-08-30 18:52:40,741 INFO L131 PetriNetUnfolder]: For 654/654 co-relation queries the response was YES. [2023-08-30 18:52:40,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 978 events. 659/978 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3439 event pairs, 229 based on Foata normal form. 24/858 useless extension candidates. Maximal degree in co-relation 2402. Up to 582 conditions per place. [2023-08-30 18:52:40,747 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 68 selfloop transitions, 6 changer transitions 3/77 dead transitions. [2023-08-30 18:52:40,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 501 flow [2023-08-30 18:52:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:52:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:52:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1189 transitions. [2023-08-30 18:52:40,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44969742813918306 [2023-08-30 18:52:40,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1189 transitions. [2023-08-30 18:52:40,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1189 transitions. [2023-08-30 18:52:40,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:40,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1189 transitions. [2023-08-30 18:52:40,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:40,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:40,759 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:40,759 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 278 flow. Second operand 4 states and 1189 transitions. [2023-08-30 18:52:40,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 501 flow [2023-08-30 18:52:40,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 465 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 18:52:40,763 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 262 flow [2023-08-30 18:52:40,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-08-30 18:52:40,766 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-08-30 18:52:40,766 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 262 flow [2023-08-30 18:52:40,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:40,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:40,767 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 18:52:40,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 18:52:40,767 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 18:52:40,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:40,768 INFO L85 PathProgramCache]: Analyzing trace with hash 372837355, now seen corresponding path program 1 times [2023-08-30 18:52:40,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:40,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098283899] [2023-08-30 18:52:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:52:41,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:41,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098283899] [2023-08-30 18:52:41,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098283899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:41,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:52:41,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:52:41,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754778296] [2023-08-30 18:52:41,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:41,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:52:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:52:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:52:41,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 661 [2023-08-30 18:52:41,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:41,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:41,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 661 [2023-08-30 18:52:41,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:41,349 INFO L130 PetriNetUnfolder]: 976/1420 cut-off events. [2023-08-30 18:52:41,350 INFO L131 PetriNetUnfolder]: For 1859/1859 co-relation queries the response was YES. [2023-08-30 18:52:41,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3968 conditions, 1420 events. 976/1420 cut-off events. For 1859/1859 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5119 event pairs, 250 based on Foata normal form. 1/1175 useless extension candidates. Maximal degree in co-relation 3870. Up to 916 conditions per place. [2023-08-30 18:52:41,358 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 71 selfloop transitions, 6 changer transitions 2/79 dead transitions. [2023-08-30 18:52:41,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 548 flow [2023-08-30 18:52:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:52:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:52:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1167 transitions. [2023-08-30 18:52:41,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413767019667171 [2023-08-30 18:52:41,362 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1167 transitions. [2023-08-30 18:52:41,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1167 transitions. [2023-08-30 18:52:41,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:41,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1167 transitions. [2023-08-30 18:52:41,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.75) internal successors, (1167), 4 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:41,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:41,384 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:41,385 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 262 flow. Second operand 4 states and 1167 transitions. [2023-08-30 18:52:41,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 548 flow [2023-08-30 18:52:41,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 520 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 18:52:41,389 INFO L231 Difference]: Finished difference. Result has 53 places, 54 transitions, 294 flow [2023-08-30 18:52:41,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=53, PETRI_TRANSITIONS=54} [2023-08-30 18:52:41,390 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-08-30 18:52:41,390 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 54 transitions, 294 flow [2023-08-30 18:52:41,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:41,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:41,393 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 18:52:41,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 18:52:41,393 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 18:52:41,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:41,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1786123932, now seen corresponding path program 1 times [2023-08-30 18:52:41,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:41,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14908605] [2023-08-30 18:52:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:41,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:52:41,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:41,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14908605] [2023-08-30 18:52:41,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14908605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:41,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:52:41,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:52:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99009763] [2023-08-30 18:52:41,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:41,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:52:41,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:41,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:52:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:52:41,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 661 [2023-08-30 18:52:41,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 54 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 286.6) internal successors, (1433), 5 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:41,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:41,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 661 [2023-08-30 18:52:41,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:42,138 INFO L130 PetriNetUnfolder]: 1778/2594 cut-off events. [2023-08-30 18:52:42,138 INFO L131 PetriNetUnfolder]: For 2916/2916 co-relation queries the response was YES. [2023-08-30 18:52:42,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7286 conditions, 2594 events. 1778/2594 cut-off events. For 2916/2916 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11140 event pairs, 691 based on Foata normal form. 20/2402 useless extension candidates. Maximal degree in co-relation 7186. Up to 1445 conditions per place. [2023-08-30 18:52:42,150 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 85 selfloop transitions, 5 changer transitions 17/107 dead transitions. [2023-08-30 18:52:42,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 107 transitions, 719 flow [2023-08-30 18:52:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:52:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:52:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1478 transitions. [2023-08-30 18:52:42,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44720121028744325 [2023-08-30 18:52:42,154 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1478 transitions. [2023-08-30 18:52:42,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1478 transitions. [2023-08-30 18:52:42,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:42,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1478 transitions. [2023-08-30 18:52:42,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 295.6) internal successors, (1478), 5 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:42,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:42,162 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:42,162 INFO L175 Difference]: Start difference. First operand has 53 places, 54 transitions, 294 flow. Second operand 5 states and 1478 transitions. [2023-08-30 18:52:42,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 107 transitions, 719 flow [2023-08-30 18:52:42,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 107 transitions, 717 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 18:52:42,167 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 320 flow [2023-08-30 18:52:42,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-08-30 18:52:42,167 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 26 predicate places. [2023-08-30 18:52:42,168 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 320 flow [2023-08-30 18:52:42,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 286.6) internal successors, (1433), 5 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:42,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:42,168 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 18:52:42,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 18:52:42,169 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 18:52:42,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash 412239492, now seen corresponding path program 2 times [2023-08-30 18:52:42,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:42,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908490402] [2023-08-30 18:52:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:42,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:52:42,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:42,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908490402] [2023-08-30 18:52:42,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908490402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:42,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226232403] [2023-08-30 18:52:42,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:52:42,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:42,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:42,413 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 18:52:42,438 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 18:52:42,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:52:42,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:42,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:52:42,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:52:42,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:52:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:52:42,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226232403] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:42,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:52:42,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-08-30 18:52:42,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339797288] [2023-08-30 18:52:42,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:42,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:52:42,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:42,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:52:42,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:52:42,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 661 [2023-08-30 18:52:42,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:42,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:42,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 661 [2023-08-30 18:52:42,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:43,433 INFO L130 PetriNetUnfolder]: 1810/2621 cut-off events. [2023-08-30 18:52:43,433 INFO L131 PetriNetUnfolder]: For 4276/4276 co-relation queries the response was YES. [2023-08-30 18:52:43,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8286 conditions, 2621 events. 1810/2621 cut-off events. For 4276/4276 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10967 event pairs, 221 based on Foata normal form. 36/2657 useless extension candidates. Maximal degree in co-relation 8182. Up to 695 conditions per place. [2023-08-30 18:52:43,448 INFO L137 encePairwiseOnDemand]: 653/661 looper letters, 113 selfloop transitions, 18 changer transitions 4/135 dead transitions. [2023-08-30 18:52:43,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 135 transitions, 962 flow [2023-08-30 18:52:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:52:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:52:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2042 transitions. [2023-08-30 18:52:43,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44132267127728547 [2023-08-30 18:52:43,453 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2042 transitions. [2023-08-30 18:52:43,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2042 transitions. [2023-08-30 18:52:43,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:43,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2042 transitions. [2023-08-30 18:52:43,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 291.7142857142857) internal successors, (2042), 7 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:43,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:43,465 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:43,465 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 320 flow. Second operand 7 states and 2042 transitions. [2023-08-30 18:52:43,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 135 transitions, 962 flow [2023-08-30 18:52:43,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 135 transitions, 948 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 18:52:43,478 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 425 flow [2023-08-30 18:52:43,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2023-08-30 18:52:43,479 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 31 predicate places. [2023-08-30 18:52:43,479 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 425 flow [2023-08-30 18:52:43,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:43,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:43,480 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 18:52:43,487 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 18:52:43,687 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 18:52:43,688 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 18:52:43,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash -191395198, now seen corresponding path program 3 times [2023-08-30 18:52:43,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:43,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488133079] [2023-08-30 18:52:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:43,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:52:43,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:43,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488133079] [2023-08-30 18:52:43,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488133079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:43,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:52:43,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:52:43,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859620946] [2023-08-30 18:52:43,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:43,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:52:43,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:43,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:52:43,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:52:43,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 661 [2023-08-30 18:52:43,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 425 flow. Second operand has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:43,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:43,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 661 [2023-08-30 18:52:43,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:44,513 INFO L130 PetriNetUnfolder]: 2058/2982 cut-off events. [2023-08-30 18:52:44,513 INFO L131 PetriNetUnfolder]: For 5964/5964 co-relation queries the response was YES. [2023-08-30 18:52:44,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10320 conditions, 2982 events. 2058/2982 cut-off events. For 5964/5964 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12878 event pairs, 633 based on Foata normal form. 20/3002 useless extension candidates. Maximal degree in co-relation 10214. Up to 1481 conditions per place. [2023-08-30 18:52:44,530 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 93 selfloop transitions, 13 changer transitions 16/122 dead transitions. [2023-08-30 18:52:44,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 122 transitions, 927 flow [2023-08-30 18:52:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:52:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:52:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1473 transitions. [2023-08-30 18:52:44,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44568835098335857 [2023-08-30 18:52:44,534 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1473 transitions. [2023-08-30 18:52:44,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1473 transitions. [2023-08-30 18:52:44,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:44,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1473 transitions. [2023-08-30 18:52:44,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.6) internal successors, (1473), 5 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:44,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:44,542 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:44,542 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 425 flow. Second operand 5 states and 1473 transitions. [2023-08-30 18:52:44,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 122 transitions, 927 flow [2023-08-30 18:52:44,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 122 transitions, 912 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 18:52:44,565 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 507 flow [2023-08-30 18:52:44,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=507, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2023-08-30 18:52:44,566 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2023-08-30 18:52:44,566 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 507 flow [2023-08-30 18:52:44,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:44,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:44,567 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 18:52:44,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 18:52:44,567 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 18:52:44,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1805816700, now seen corresponding path program 4 times [2023-08-30 18:52:44,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:44,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623249327] [2023-08-30 18:52:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:44,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:52:44,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:44,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623249327] [2023-08-30 18:52:44,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623249327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:44,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:52:44,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:52:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327867259] [2023-08-30 18:52:44,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:44,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:52:44,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:52:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:52:44,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 661 [2023-08-30 18:52:44,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 507 flow. Second operand has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:44,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:44,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 661 [2023-08-30 18:52:44,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:45,330 INFO L130 PetriNetUnfolder]: 1966/2849 cut-off events. [2023-08-30 18:52:45,330 INFO L131 PetriNetUnfolder]: For 7858/7858 co-relation queries the response was YES. [2023-08-30 18:52:45,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10552 conditions, 2849 events. 1966/2849 cut-off events. For 7858/7858 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12097 event pairs, 683 based on Foata normal form. 20/2869 useless extension candidates. Maximal degree in co-relation 10442. Up to 1800 conditions per place. [2023-08-30 18:52:45,350 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 87 selfloop transitions, 14 changer transitions 18/119 dead transitions. [2023-08-30 18:52:45,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 119 transitions, 984 flow [2023-08-30 18:52:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:52:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:52:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1470 transitions. [2023-08-30 18:52:45,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44478063540090773 [2023-08-30 18:52:45,355 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1470 transitions. [2023-08-30 18:52:45,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1470 transitions. [2023-08-30 18:52:45,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:45,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1470 transitions. [2023-08-30 18:52:45,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.0) internal successors, (1470), 5 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:45,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:45,387 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:45,387 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 507 flow. Second operand 5 states and 1470 transitions. [2023-08-30 18:52:45,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 119 transitions, 984 flow [2023-08-30 18:52:45,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 119 transitions, 967 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 18:52:45,440 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 590 flow [2023-08-30 18:52:45,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=590, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-30 18:52:45,441 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 40 predicate places. [2023-08-30 18:52:45,441 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 590 flow [2023-08-30 18:52:45,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:45,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:45,442 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 18:52:45,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 18:52:45,443 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 18:52:45,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:45,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1234754154, now seen corresponding path program 5 times [2023-08-30 18:52:45,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:45,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000103399] [2023-08-30 18:52:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:45,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:52:45,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:45,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000103399] [2023-08-30 18:52:45,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000103399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:45,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:52:45,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:52:45,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79709529] [2023-08-30 18:52:45,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:45,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:52:45,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:45,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:52:45,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:52:45,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 661 [2023-08-30 18:52:45,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 590 flow. Second operand has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:45,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:45,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 661 [2023-08-30 18:52:45,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:46,328 INFO L130 PetriNetUnfolder]: 1982/2860 cut-off events. [2023-08-30 18:52:46,328 INFO L131 PetriNetUnfolder]: For 9015/9015 co-relation queries the response was YES. [2023-08-30 18:52:46,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 2860 events. 1982/2860 cut-off events. For 9015/9015 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12057 event pairs, 587 based on Foata normal form. 36/2896 useless extension candidates. Maximal degree in co-relation 10758. Up to 1481 conditions per place. [2023-08-30 18:52:46,349 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 113 selfloop transitions, 20 changer transitions 2/135 dead transitions. [2023-08-30 18:52:46,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 135 transitions, 1110 flow [2023-08-30 18:52:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:52:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:52:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1757 transitions. [2023-08-30 18:52:46,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44301563287947554 [2023-08-30 18:52:46,358 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1757 transitions. [2023-08-30 18:52:46,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1757 transitions. [2023-08-30 18:52:46,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:46,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1757 transitions. [2023-08-30 18:52:46,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 292.8333333333333) internal successors, (1757), 6 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:46,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:46,369 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:46,369 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 590 flow. Second operand 6 states and 1757 transitions. [2023-08-30 18:52:46,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 135 transitions, 1110 flow [2023-08-30 18:52:46,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 135 transitions, 1091 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 18:52:46,400 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 659 flow [2023-08-30 18:52:46,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=659, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-08-30 18:52:46,401 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-08-30 18:52:46,401 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 659 flow [2023-08-30 18:52:46,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:46,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:46,402 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 18:52:46,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 18:52:46,403 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 18:52:46,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash -960619028, now seen corresponding path program 6 times [2023-08-30 18:52:46,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:46,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441813402] [2023-08-30 18:52:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:46,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:52:46,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441813402] [2023-08-30 18:52:46,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441813402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:52:46,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:52:46,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:52:46,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321124929] [2023-08-30 18:52:46,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:52:46,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:52:46,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:52:46,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:52:46,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 661 [2023-08-30 18:52:46,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 659 flow. Second operand has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:46,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:46,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 661 [2023-08-30 18:52:46,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:47,198 INFO L130 PetriNetUnfolder]: 1978/2850 cut-off events. [2023-08-30 18:52:47,198 INFO L131 PetriNetUnfolder]: For 10685/10685 co-relation queries the response was YES. [2023-08-30 18:52:47,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 2850 events. 1978/2850 cut-off events. For 10685/10685 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11901 event pairs, 669 based on Foata normal form. 36/2886 useless extension candidates. Maximal degree in co-relation 11499. Up to 1666 conditions per place. [2023-08-30 18:52:47,219 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 110 selfloop transitions, 16 changer transitions 5/131 dead transitions. [2023-08-30 18:52:47,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 1155 flow [2023-08-30 18:52:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:52:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:52:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1752 transitions. [2023-08-30 18:52:47,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44175491679273826 [2023-08-30 18:52:47,224 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1752 transitions. [2023-08-30 18:52:47,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1752 transitions. [2023-08-30 18:52:47,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:47,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1752 transitions. [2023-08-30 18:52:47,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:47,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:47,234 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:47,234 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 659 flow. Second operand 6 states and 1752 transitions. [2023-08-30 18:52:47,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 1155 flow [2023-08-30 18:52:47,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 1135 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 18:52:47,276 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 675 flow [2023-08-30 18:52:47,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=675, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-08-30 18:52:47,277 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2023-08-30 18:52:47,277 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 675 flow [2023-08-30 18:52:47,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:47,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:47,278 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:52:47,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 18:52:47,279 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 18:52:47,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1450948268, now seen corresponding path program 1 times [2023-08-30 18:52:47,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:47,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688380933] [2023-08-30 18:52:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:49,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:49,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688380933] [2023-08-30 18:52:49,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688380933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:49,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647450954] [2023-08-30 18:52:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:49,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:49,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:49,759 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 18:52:49,762 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 18:52:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:49,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 18:52:49,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:50,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:52:50,315 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 18:52:50,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:50,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:52:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:52:50,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:52:51,856 INFO L321 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-08-30 18:52:51,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 233 [2023-08-30 18:52:51,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:51,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 156 [2023-08-30 18:53:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:04,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647450954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:04,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:04,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 12] total 47 [2023-08-30 18:53:04,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040458368] [2023-08-30 18:53:04,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:04,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 18:53:04,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 18:53:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2134, Unknown=29, NotChecked=0, Total=2352 [2023-08-30 18:53:06,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 661 [2023-08-30 18:53:06,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 675 flow. Second operand has 49 states, 49 states have (on average 194.85714285714286) internal successors, (9548), 49 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:06,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:06,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 661 [2023-08-30 18:53:06,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:13,163 INFO L130 PetriNetUnfolder]: 5790/8410 cut-off events. [2023-08-30 18:53:13,163 INFO L131 PetriNetUnfolder]: For 30070/30070 co-relation queries the response was YES. [2023-08-30 18:53:13,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33259 conditions, 8410 events. 5790/8410 cut-off events. For 30070/30070 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 44922 event pairs, 435 based on Foata normal form. 3/8413 useless extension candidates. Maximal degree in co-relation 33144. Up to 2105 conditions per place. [2023-08-30 18:53:13,227 INFO L137 encePairwiseOnDemand]: 641/661 looper letters, 361 selfloop transitions, 190 changer transitions 28/579 dead transitions. [2023-08-30 18:53:13,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 579 transitions, 5132 flow [2023-08-30 18:53:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 18:53:13,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 18:53:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 7931 transitions. [2023-08-30 18:53:13,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3076535164281004 [2023-08-30 18:53:13,250 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 7931 transitions. [2023-08-30 18:53:13,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 7931 transitions. [2023-08-30 18:53:13,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:13,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 7931 transitions. [2023-08-30 18:53:13,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 203.35897435897436) internal successors, (7931), 39 states have internal predecessors, (7931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:13,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 661.0) internal successors, (26440), 40 states have internal predecessors, (26440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:13,300 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 661.0) internal successors, (26440), 40 states have internal predecessors, (26440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:13,300 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 675 flow. Second operand 39 states and 7931 transitions. [2023-08-30 18:53:13,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 579 transitions, 5132 flow [2023-08-30 18:53:13,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 579 transitions, 4672 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-08-30 18:53:13,467 INFO L231 Difference]: Finished difference. Result has 135 places, 274 transitions, 3074 flow [2023-08-30 18:53:13,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3074, PETRI_PLACES=135, PETRI_TRANSITIONS=274} [2023-08-30 18:53:13,468 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 101 predicate places. [2023-08-30 18:53:13,469 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 274 transitions, 3074 flow [2023-08-30 18:53:13,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 194.85714285714286) internal successors, (9548), 49 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:13,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:13,471 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:53:13,483 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 18:53:13,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:13,683 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 18:53:13,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash -926238340, now seen corresponding path program 2 times [2023-08-30 18:53:13,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:13,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989463698] [2023-08-30 18:53:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:13,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:15,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:15,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989463698] [2023-08-30 18:53:15,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989463698] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:15,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048951582] [2023-08-30 18:53:15,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:53:15,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:15,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:15,809 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 18:53:15,813 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 18:53:16,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:53:16,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:53:16,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 18:53:16,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:16,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:16,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:53:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:16,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:17,212 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:53:17,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:53:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:17,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048951582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:17,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:17,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 44 [2023-08-30 18:53:17,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562068836] [2023-08-30 18:53:17,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:17,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 18:53:17,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:17,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 18:53:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2023-08-30 18:53:21,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 661 [2023-08-30 18:53:21,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 274 transitions, 3074 flow. Second operand has 45 states, 45 states have (on average 237.0222222222222) internal successors, (10666), 45 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:21,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:21,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 661 [2023-08-30 18:53:21,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:25,625 INFO L130 PetriNetUnfolder]: 7422/10743 cut-off events. [2023-08-30 18:53:25,626 INFO L131 PetriNetUnfolder]: For 69629/69629 co-relation queries the response was YES. [2023-08-30 18:53:25,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56089 conditions, 10743 events. 7422/10743 cut-off events. For 69629/69629 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 59319 event pairs, 1470 based on Foata normal form. 2/10745 useless extension candidates. Maximal degree in co-relation 55941. Up to 6321 conditions per place. [2023-08-30 18:53:25,716 INFO L137 encePairwiseOnDemand]: 642/661 looper letters, 264 selfloop transitions, 264 changer transitions 125/653 dead transitions. [2023-08-30 18:53:25,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 653 transitions, 7992 flow [2023-08-30 18:53:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 18:53:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 18:53:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 6808 transitions. [2023-08-30 18:53:25,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678409336503134 [2023-08-30 18:53:25,727 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 6808 transitions. [2023-08-30 18:53:25,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 6808 transitions. [2023-08-30 18:53:25,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:25,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 6808 transitions. [2023-08-30 18:53:25,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 243.14285714285714) internal successors, (6808), 28 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:25,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:25,757 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:25,758 INFO L175 Difference]: Start difference. First operand has 135 places, 274 transitions, 3074 flow. Second operand 28 states and 6808 transitions. [2023-08-30 18:53:25,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 653 transitions, 7992 flow [2023-08-30 18:53:26,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 653 transitions, 7775 flow, removed 96 selfloop flow, removed 5 redundant places. [2023-08-30 18:53:26,137 INFO L231 Difference]: Finished difference. Result has 172 places, 406 transitions, 5443 flow [2023-08-30 18:53:26,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5443, PETRI_PLACES=172, PETRI_TRANSITIONS=406} [2023-08-30 18:53:26,138 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 138 predicate places. [2023-08-30 18:53:26,138 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 406 transitions, 5443 flow [2023-08-30 18:53:26,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 237.0222222222222) internal successors, (10666), 45 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:26,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:26,139 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:53:26,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 18:53:26,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:26,340 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 18:53:26,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:26,341 INFO L85 PathProgramCache]: Analyzing trace with hash -958745844, now seen corresponding path program 3 times [2023-08-30 18:53:26,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:26,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873995393] [2023-08-30 18:53:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:26,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:27,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:27,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873995393] [2023-08-30 18:53:27,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873995393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:27,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901021536] [2023-08-30 18:53:27,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:53:27,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:27,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:27,699 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 18:53:27,722 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 18:53:27,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:53:27,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:53:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:53:27,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:28,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:28,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:53:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:28,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:28,818 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:53:28,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:53:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:29,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901021536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:29,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:29,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-08-30 18:53:29,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710248591] [2023-08-30 18:53:29,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:29,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 18:53:29,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 18:53:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2023-08-30 18:53:31,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 18:53:31,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 406 transitions, 5443 flow. Second operand has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:31,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:31,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 18:53:31,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:34,647 INFO L130 PetriNetUnfolder]: 8638/12483 cut-off events. [2023-08-30 18:53:34,647 INFO L131 PetriNetUnfolder]: For 151315/151315 co-relation queries the response was YES. [2023-08-30 18:53:34,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85708 conditions, 12483 events. 8638/12483 cut-off events. For 151315/151315 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 70202 event pairs, 1855 based on Foata normal form. 2/12485 useless extension candidates. Maximal degree in co-relation 85544. Up to 5896 conditions per place. [2023-08-30 18:53:34,783 INFO L137 encePairwiseOnDemand]: 646/661 looper letters, 364 selfloop transitions, 301 changer transitions 13/678 dead transitions. [2023-08-30 18:53:34,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 678 transitions, 9762 flow [2023-08-30 18:53:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 18:53:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 18:53:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5176 transitions. [2023-08-30 18:53:34,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39152798789712556 [2023-08-30 18:53:34,790 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5176 transitions. [2023-08-30 18:53:34,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5176 transitions. [2023-08-30 18:53:34,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:34,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5176 transitions. [2023-08-30 18:53:34,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 258.8) internal successors, (5176), 20 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:34,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 661.0) internal successors, (13881), 21 states have internal predecessors, (13881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:34,808 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 661.0) internal successors, (13881), 21 states have internal predecessors, (13881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:34,809 INFO L175 Difference]: Start difference. First operand has 172 places, 406 transitions, 5443 flow. Second operand 20 states and 5176 transitions. [2023-08-30 18:53:34,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 678 transitions, 9762 flow [2023-08-30 18:53:35,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 678 transitions, 9419 flow, removed 162 selfloop flow, removed 7 redundant places. [2023-08-30 18:53:35,998 INFO L231 Difference]: Finished difference. Result has 186 places, 487 transitions, 7084 flow [2023-08-30 18:53:35,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=5172, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7084, PETRI_PLACES=186, PETRI_TRANSITIONS=487} [2023-08-30 18:53:35,999 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 152 predicate places. [2023-08-30 18:53:35,999 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 487 transitions, 7084 flow [2023-08-30 18:53:36,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:36,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:36,000 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:53:36,007 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 18:53:36,201 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,SelfDestructingSolverStorable15 [2023-08-30 18:53:36,201 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 18:53:36,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:36,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1719213602, now seen corresponding path program 4 times [2023-08-30 18:53:36,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:36,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164370407] [2023-08-30 18:53:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:36,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:37,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:37,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164370407] [2023-08-30 18:53:37,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164370407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:37,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181203214] [2023-08-30 18:53:37,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:53:37,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:37,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:37,393 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 18:53:37,395 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 18:53:37,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:53:37,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:53:37,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:53:37,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:37,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:37,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:53:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:38,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:38,575 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:53:38,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:53:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:38,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181203214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:38,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:38,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 32 [2023-08-30 18:53:38,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936547046] [2023-08-30 18:53:38,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:38,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 18:53:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 18:53:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 18:53:40,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 18:53:40,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 487 transitions, 7084 flow. Second operand has 33 states, 33 states have (on average 250.24242424242425) internal successors, (8258), 33 states have internal predecessors, (8258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:40,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:40,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 18:53:40,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:45,439 INFO L130 PetriNetUnfolder]: 10045/14543 cut-off events. [2023-08-30 18:53:45,440 INFO L131 PetriNetUnfolder]: For 200844/200844 co-relation queries the response was YES. [2023-08-30 18:53:45,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104686 conditions, 14543 events. 10045/14543 cut-off events. For 200844/200844 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 84704 event pairs, 1848 based on Foata normal form. 1/14544 useless extension candidates. Maximal degree in co-relation 104524. Up to 6180 conditions per place. [2023-08-30 18:53:45,675 INFO L137 encePairwiseOnDemand]: 646/661 looper letters, 392 selfloop transitions, 483 changer transitions 20/895 dead transitions. [2023-08-30 18:53:45,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 895 transitions, 13581 flow [2023-08-30 18:53:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 18:53:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 18:53:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 7489 transitions. [2023-08-30 18:53:45,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906828733893265 [2023-08-30 18:53:45,687 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 7489 transitions. [2023-08-30 18:53:45,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 7489 transitions. [2023-08-30 18:53:45,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:45,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 7489 transitions. [2023-08-30 18:53:45,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 258.2413793103448) internal successors, (7489), 29 states have internal predecessors, (7489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:45,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 661.0) internal successors, (19830), 30 states have internal predecessors, (19830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:45,717 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 661.0) internal successors, (19830), 30 states have internal predecessors, (19830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:45,717 INFO L175 Difference]: Start difference. First operand has 186 places, 487 transitions, 7084 flow. Second operand 29 states and 7489 transitions. [2023-08-30 18:53:45,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 895 transitions, 13581 flow [2023-08-30 18:53:47,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 895 transitions, 13303 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-08-30 18:53:47,202 INFO L231 Difference]: Finished difference. Result has 218 places, 665 transitions, 10888 flow [2023-08-30 18:53:47,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=6871, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10888, PETRI_PLACES=218, PETRI_TRANSITIONS=665} [2023-08-30 18:53:47,202 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 184 predicate places. [2023-08-30 18:53:47,203 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 665 transitions, 10888 flow [2023-08-30 18:53:47,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 250.24242424242425) internal successors, (8258), 33 states have internal predecessors, (8258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:47,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:47,204 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:53:47,211 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 18:53:47,409 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,SelfDestructingSolverStorable16 [2023-08-30 18:53:47,409 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 18:53:47,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:47,410 INFO L85 PathProgramCache]: Analyzing trace with hash 88049456, now seen corresponding path program 5 times [2023-08-30 18:53:47,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:47,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839581640] [2023-08-30 18:53:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:47,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:48,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839581640] [2023-08-30 18:53:48,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839581640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118166150] [2023-08-30 18:53:48,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:53:48,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:48,541 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 18:53:48,570 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 18:53:48,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:53:48,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:53:48,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 18:53:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:49,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:49,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-08-30 18:53:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:49,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:51,655 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:53:51,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:53:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:53:51,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118166150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:51,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:51,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 34 [2023-08-30 18:53:51,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982463282] [2023-08-30 18:53:51,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:51,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 18:53:51,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 18:53:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 18:53:54,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:56,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:59,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:54:02,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:54:04,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:54:06,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:54:06,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 661 [2023-08-30 18:54:06,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 665 transitions, 10888 flow. Second operand has 35 states, 35 states have (on average 244.22857142857143) internal successors, (8548), 35 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:06,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:06,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 661 [2023-08-30 18:54:06,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:11,852 INFO L130 PetriNetUnfolder]: 11137/16109 cut-off events. [2023-08-30 18:54:11,852 INFO L131 PetriNetUnfolder]: For 270755/270755 co-relation queries the response was YES. [2023-08-30 18:54:11,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127209 conditions, 16109 events. 11137/16109 cut-off events. For 270755/270755 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 95215 event pairs, 2162 based on Foata normal form. 1/16110 useless extension candidates. Maximal degree in co-relation 127035. Up to 6330 conditions per place. [2023-08-30 18:54:12,064 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 385 selfloop transitions, 505 changer transitions 13/903 dead transitions. [2023-08-30 18:54:12,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 903 transitions, 15449 flow [2023-08-30 18:54:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:54:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:54:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5559 transitions. [2023-08-30 18:54:12,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38227203960940725 [2023-08-30 18:54:12,073 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5559 transitions. [2023-08-30 18:54:12,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5559 transitions. [2023-08-30 18:54:12,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:12,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5559 transitions. [2023-08-30 18:54:12,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 252.6818181818182) internal successors, (5559), 22 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:12,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:12,096 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:12,096 INFO L175 Difference]: Start difference. First operand has 218 places, 665 transitions, 10888 flow. Second operand 22 states and 5559 transitions. [2023-08-30 18:54:12,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 903 transitions, 15449 flow [2023-08-30 18:54:14,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 903 transitions, 15195 flow, removed 73 selfloop flow, removed 10 redundant places. [2023-08-30 18:54:14,752 INFO L231 Difference]: Finished difference. Result has 236 places, 715 transitions, 12682 flow [2023-08-30 18:54:14,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=10639, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12682, PETRI_PLACES=236, PETRI_TRANSITIONS=715} [2023-08-30 18:54:14,753 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 202 predicate places. [2023-08-30 18:54:14,753 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 715 transitions, 12682 flow [2023-08-30 18:54:14,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 244.22857142857143) internal successors, (8548), 35 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:14,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:14,755 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:54:14,763 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 18:54:14,962 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,SelfDestructingSolverStorable17 [2023-08-30 18:54:14,962 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 18:54:14,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:14,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1841694086, now seen corresponding path program 6 times [2023-08-30 18:54:14,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:14,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380238194] [2023-08-30 18:54:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:14,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:54:16,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380238194] [2023-08-30 18:54:16,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380238194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421030522] [2023-08-30 18:54:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:54:16,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:16,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:16,101 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 18:54:16,131 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 18:54:16,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:54:16,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:16,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:54:16,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:16,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:16,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:54:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:54:16,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:17,048 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:54:17,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:54:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:54:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421030522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:17,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:17,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2023-08-30 18:54:17,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8074949] [2023-08-30 18:54:17,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:17,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:54:17,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:54:17,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-08-30 18:54:19,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 18:54:19,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 715 transitions, 12682 flow. Second operand has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:19,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:19,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 18:54:19,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:24,140 INFO L130 PetriNetUnfolder]: 11255/16280 cut-off events. [2023-08-30 18:54:24,140 INFO L131 PetriNetUnfolder]: For 319224/319224 co-relation queries the response was YES. [2023-08-30 18:54:24,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135646 conditions, 16280 events. 11255/16280 cut-off events. For 319224/319224 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 96359 event pairs, 2338 based on Foata normal form. 1/16281 useless extension candidates. Maximal degree in co-relation 135466. Up to 6819 conditions per place. [2023-08-30 18:54:24,313 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 406 selfloop transitions, 489 changer transitions 16/911 dead transitions. [2023-08-30 18:54:24,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 911 transitions, 16645 flow [2023-08-30 18:54:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:54:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:54:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5690 transitions. [2023-08-30 18:54:24,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912804291019117 [2023-08-30 18:54:24,320 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5690 transitions. [2023-08-30 18:54:24,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5690 transitions. [2023-08-30 18:54:24,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:24,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5690 transitions. [2023-08-30 18:54:24,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 258.6363636363636) internal successors, (5690), 22 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:24,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:24,337 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:24,337 INFO L175 Difference]: Start difference. First operand has 236 places, 715 transitions, 12682 flow. Second operand 22 states and 5690 transitions. [2023-08-30 18:54:24,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 911 transitions, 16645 flow [2023-08-30 18:54:27,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 911 transitions, 16144 flow, removed 88 selfloop flow, removed 8 redundant places. [2023-08-30 18:54:27,071 INFO L231 Difference]: Finished difference. Result has 251 places, 719 transitions, 13282 flow [2023-08-30 18:54:27,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=12213, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=13282, PETRI_PLACES=251, PETRI_TRANSITIONS=719} [2023-08-30 18:54:27,073 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 217 predicate places. [2023-08-30 18:54:27,073 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 719 transitions, 13282 flow [2023-08-30 18:54:27,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:27,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:27,074 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:54:27,081 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 18:54:27,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:27,281 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 18:54:27,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1373405120, now seen corresponding path program 7 times [2023-08-30 18:54:27,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:27,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458407766] [2023-08-30 18:54:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:27,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-30 18:54:29,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458407766] [2023-08-30 18:54:29,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458407766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063720923] [2023-08-30 18:54:29,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:54:29,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:29,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:29,394 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 18:54:29,396 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 18:54:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:29,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:54:29,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:29,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:29,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:54:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:54:29,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:30,500 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:54:30,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:54:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:54:30,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063720923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:30,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:30,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 10] total 40 [2023-08-30 18:54:30,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764050327] [2023-08-30 18:54:30,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:30,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 18:54:30,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:30,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 18:54:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 18:54:34,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 661 [2023-08-30 18:54:34,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 719 transitions, 13282 flow. Second operand has 41 states, 41 states have (on average 237.0487804878049) internal successors, (9719), 41 states have internal predecessors, (9719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:34,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:34,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 661 [2023-08-30 18:54:34,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:40,654 INFO L130 PetriNetUnfolder]: 11399/16498 cut-off events. [2023-08-30 18:54:40,654 INFO L131 PetriNetUnfolder]: For 336682/336682 co-relation queries the response was YES. [2023-08-30 18:54:40,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140447 conditions, 16498 events. 11399/16498 cut-off events. For 336682/336682 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 97772 event pairs, 2738 based on Foata normal form. 2/16500 useless extension candidates. Maximal degree in co-relation 140265. Up to 7500 conditions per place. [2023-08-30 18:54:40,954 INFO L137 encePairwiseOnDemand]: 642/661 looper letters, 421 selfloop transitions, 457 changer transitions 11/889 dead transitions. [2023-08-30 18:54:40,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 889 transitions, 16963 flow [2023-08-30 18:54:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 18:54:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 18:54:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6080 transitions. [2023-08-30 18:54:40,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3679273827534039 [2023-08-30 18:54:40,963 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6080 transitions. [2023-08-30 18:54:40,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6080 transitions. [2023-08-30 18:54:40,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:40,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6080 transitions. [2023-08-30 18:54:40,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 243.2) internal successors, (6080), 25 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:40,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 661.0) internal successors, (17186), 26 states have internal predecessors, (17186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:40,988 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 661.0) internal successors, (17186), 26 states have internal predecessors, (17186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:40,989 INFO L175 Difference]: Start difference. First operand has 251 places, 719 transitions, 13282 flow. Second operand 25 states and 6080 transitions. [2023-08-30 18:54:40,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 889 transitions, 16963 flow [2023-08-30 18:54:43,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 889 transitions, 16035 flow, removed 48 selfloop flow, removed 16 redundant places. [2023-08-30 18:54:43,816 INFO L231 Difference]: Finished difference. Result has 261 places, 725 transitions, 13504 flow [2023-08-30 18:54:43,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=12392, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13504, PETRI_PLACES=261, PETRI_TRANSITIONS=725} [2023-08-30 18:54:43,817 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 227 predicate places. [2023-08-30 18:54:43,817 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 725 transitions, 13504 flow [2023-08-30 18:54:43,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 237.0487804878049) internal successors, (9719), 41 states have internal predecessors, (9719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:43,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:43,818 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:54:43,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:44,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:44,019 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 18:54:44,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2083753392, now seen corresponding path program 8 times [2023-08-30 18:54:44,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:44,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259761862] [2023-08-30 18:54:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:44,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:54:45,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:45,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259761862] [2023-08-30 18:54:45,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259761862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:45,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804275197] [2023-08-30 18:54:45,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:54:45,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:45,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:45,077 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 18:54:45,080 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 18:54:45,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:54:45,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:54:45,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:45,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:45,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:54:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:54:45,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:46,135 INFO L321 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-08-30 18:54:46,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 212 [2023-08-30 18:54:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:54:54,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804275197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:54,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:54,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-08-30 18:54:54,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774655615] [2023-08-30 18:54:54,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:54,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 18:54:54,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 18:54:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2023-08-30 18:54:56,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 18:54:56,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 725 transitions, 13504 flow. Second operand has 31 states, 31 states have (on average 250.16129032258064) internal successors, (7755), 31 states have internal predecessors, (7755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:56,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:56,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 18:54:56,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:03,512 INFO L130 PetriNetUnfolder]: 15008/21628 cut-off events. [2023-08-30 18:55:03,512 INFO L131 PetriNetUnfolder]: For 474583/474583 co-relation queries the response was YES. [2023-08-30 18:55:03,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186612 conditions, 21628 events. 15008/21628 cut-off events. For 474583/474583 co-relation queries the response was YES. Maximal size of possible extension queue 1163. Compared 132315 event pairs, 2346 based on Foata normal form. 1/21629 useless extension candidates. Maximal degree in co-relation 186418. Up to 10523 conditions per place. [2023-08-30 18:55:03,803 INFO L137 encePairwiseOnDemand]: 649/661 looper letters, 442 selfloop transitions, 604 changer transitions 125/1171 dead transitions. [2023-08-30 18:55:03,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1171 transitions, 21989 flow [2023-08-30 18:55:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 18:55:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 18:55:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 7227 transitions. [2023-08-30 18:55:03,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904797925221526 [2023-08-30 18:55:03,812 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 7227 transitions. [2023-08-30 18:55:03,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 7227 transitions. [2023-08-30 18:55:03,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:03,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 7227 transitions. [2023-08-30 18:55:03,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 258.10714285714283) internal successors, (7227), 28 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:03,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:03,838 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:03,838 INFO L175 Difference]: Start difference. First operand has 261 places, 725 transitions, 13504 flow. Second operand 28 states and 7227 transitions. [2023-08-30 18:55:03,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1171 transitions, 21989 flow [2023-08-30 18:55:08,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 1171 transitions, 21033 flow, removed 40 selfloop flow, removed 17 redundant places. [2023-08-30 18:55:08,218 INFO L231 Difference]: Finished difference. Result has 289 places, 866 transitions, 17235 flow [2023-08-30 18:55:08,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=12674, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17235, PETRI_PLACES=289, PETRI_TRANSITIONS=866} [2023-08-30 18:55:08,218 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 255 predicate places. [2023-08-30 18:55:08,219 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 866 transitions, 17235 flow [2023-08-30 18:55:08,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 250.16129032258064) internal successors, (7755), 31 states have internal predecessors, (7755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:08,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:08,220 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:55:08,227 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 18:55:08,420 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,SelfDestructingSolverStorable20 [2023-08-30 18:55:08,421 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 18:55:08,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:08,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1152200182, now seen corresponding path program 9 times [2023-08-30 18:55:08,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:08,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344063899] [2023-08-30 18:55:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:08,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:55:09,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:09,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344063899] [2023-08-30 18:55:09,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344063899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:09,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147085378] [2023-08-30 18:55:09,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:55:09,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:09,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:09,313 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 18:55:09,317 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 18:55:09,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:55:09,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:09,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:55:09,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:09,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:09,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:55:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:55:09,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:10,331 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:55:10,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:55:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:55:10,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147085378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:10,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:10,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 29 [2023-08-30 18:55:10,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065225034] [2023-08-30 18:55:10,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:10,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 18:55:10,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 18:55:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2023-08-30 18:55:12,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 18:55:12,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 866 transitions, 17235 flow. Second operand has 30 states, 30 states have (on average 250.33333333333334) internal successors, (7510), 30 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:12,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:12,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 18:55:12,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:19,119 INFO L130 PetriNetUnfolder]: 13257/19159 cut-off events. [2023-08-30 18:55:19,119 INFO L131 PetriNetUnfolder]: For 715015/715015 co-relation queries the response was YES. [2023-08-30 18:55:19,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194977 conditions, 19159 events. 13257/19159 cut-off events. For 715015/715015 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 116389 event pairs, 2427 based on Foata normal form. 1/19160 useless extension candidates. Maximal degree in co-relation 194780. Up to 7040 conditions per place. [2023-08-30 18:55:19,391 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 510 selfloop transitions, 558 changer transitions 39/1107 dead transitions. [2023-08-30 18:55:19,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 1107 transitions, 22947 flow [2023-08-30 18:55:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 18:55:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 18:55:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5937 transitions. [2023-08-30 18:55:19,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3905150299283036 [2023-08-30 18:55:19,399 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5937 transitions. [2023-08-30 18:55:19,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5937 transitions. [2023-08-30 18:55:19,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:19,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5937 transitions. [2023-08-30 18:55:19,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 258.1304347826087) internal successors, (5937), 23 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:19,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:19,419 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:19,419 INFO L175 Difference]: Start difference. First operand has 289 places, 866 transitions, 17235 flow. Second operand 23 states and 5937 transitions. [2023-08-30 18:55:19,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 1107 transitions, 22947 flow [2023-08-30 18:55:26,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1107 transitions, 21907 flow, removed 336 selfloop flow, removed 6 redundant places. [2023-08-30 18:55:26,532 INFO L231 Difference]: Finished difference. Result has 311 places, 885 transitions, 18054 flow [2023-08-30 18:55:26,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=16322, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=18054, PETRI_PLACES=311, PETRI_TRANSITIONS=885} [2023-08-30 18:55:26,533 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 277 predicate places. [2023-08-30 18:55:26,533 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 885 transitions, 18054 flow [2023-08-30 18:55:26,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 250.33333333333334) internal successors, (7510), 30 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:26,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:26,534 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:55:26,540 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 18:55:26,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:26,735 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 18:55:26,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash -200624508, now seen corresponding path program 10 times [2023-08-30 18:55:26,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:26,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898412798] [2023-08-30 18:55:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:26,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:55:27,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:27,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898412798] [2023-08-30 18:55:27,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898412798] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:27,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576183756] [2023-08-30 18:55:27,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:55:27,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:27,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:27,741 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 18:55:27,772 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 18:55:27,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:55:27,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:27,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:55:27,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:28,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:28,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:55:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:55:28,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:28,694 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:55:28,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:55:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:55:28,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576183756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:28,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:28,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2023-08-30 18:55:28,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808829229] [2023-08-30 18:55:28,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:28,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:55:28,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:28,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:55:28,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-08-30 18:55:31,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 18:55:31,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 885 transitions, 18054 flow. Second operand has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:31,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:31,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 18:55:31,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:37,877 INFO L130 PetriNetUnfolder]: 13067/18881 cut-off events. [2023-08-30 18:55:37,877 INFO L131 PetriNetUnfolder]: For 780868/780868 co-relation queries the response was YES. [2023-08-30 18:55:38,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194700 conditions, 18881 events. 13067/18881 cut-off events. For 780868/780868 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 114040 event pairs, 2598 based on Foata normal form. 1/18882 useless extension candidates. Maximal degree in co-relation 194496. Up to 7258 conditions per place. [2023-08-30 18:55:38,146 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 527 selfloop transitions, 547 changer transitions 1/1075 dead transitions. [2023-08-30 18:55:38,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1075 transitions, 22536 flow [2023-08-30 18:55:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:55:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:55:38,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5677 transitions. [2023-08-30 18:55:38,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39038646678586164 [2023-08-30 18:55:38,151 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5677 transitions. [2023-08-30 18:55:38,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5677 transitions. [2023-08-30 18:55:38,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:38,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5677 transitions. [2023-08-30 18:55:38,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 258.04545454545456) internal successors, (5677), 22 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:38,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:38,166 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:38,166 INFO L175 Difference]: Start difference. First operand has 311 places, 885 transitions, 18054 flow. Second operand 22 states and 5677 transitions. [2023-08-30 18:55:38,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1075 transitions, 22536 flow [2023-08-30 18:55:44,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1075 transitions, 21393 flow, removed 96 selfloop flow, removed 15 redundant places. [2023-08-30 18:55:44,076 INFO L231 Difference]: Finished difference. Result has 317 places, 889 transitions, 18139 flow [2023-08-30 18:55:44,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=16938, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=18139, PETRI_PLACES=317, PETRI_TRANSITIONS=889} [2023-08-30 18:55:44,078 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 283 predicate places. [2023-08-30 18:55:44,078 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 889 transitions, 18139 flow [2023-08-30 18:55:44,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:44,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:44,079 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:55:44,084 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 18:55:44,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:44,280 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 18:55:44,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:44,280 INFO L85 PathProgramCache]: Analyzing trace with hash 512198078, now seen corresponding path program 11 times [2023-08-30 18:55:44,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:44,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262831504] [2023-08-30 18:55:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:44,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:55:45,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262831504] [2023-08-30 18:55:45,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262831504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423119564] [2023-08-30 18:55:45,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:55:45,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:45,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:45,294 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 18:55:45,301 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 18:55:45,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:55:45,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:45,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:55:45,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:45,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:45,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:55:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:55:45,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:46,283 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:55:46,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:55:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:55:46,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423119564] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:46,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:46,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-08-30 18:55:46,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287233749] [2023-08-30 18:55:46,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:46,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 18:55:46,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 18:55:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2023-08-30 18:55:48,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 18:55:48,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 889 transitions, 18139 flow. Second operand has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:48,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:48,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 18:55:48,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:56,421 INFO L130 PetriNetUnfolder]: 13611/19666 cut-off events. [2023-08-30 18:55:56,421 INFO L131 PetriNetUnfolder]: For 824202/824202 co-relation queries the response was YES. [2023-08-30 18:55:56,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203844 conditions, 19666 events. 13611/19666 cut-off events. For 824202/824202 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 119346 event pairs, 1960 based on Foata normal form. 1/19667 useless extension candidates. Maximal degree in co-relation 203639. Up to 6668 conditions per place. [2023-08-30 18:55:56,701 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 506 selfloop transitions, 638 changer transitions 31/1175 dead transitions. [2023-08-30 18:55:56,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1175 transitions, 24593 flow [2023-08-30 18:55:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 18:55:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 18:55:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 8250 transitions. [2023-08-30 18:55:56,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900340393343419 [2023-08-30 18:55:56,705 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 8250 transitions. [2023-08-30 18:55:56,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 8250 transitions. [2023-08-30 18:55:56,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:56,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 8250 transitions. [2023-08-30 18:55:56,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 257.8125) internal successors, (8250), 32 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:56,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 661.0) internal successors, (21813), 33 states have internal predecessors, (21813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:56,720 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 661.0) internal successors, (21813), 33 states have internal predecessors, (21813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:56,720 INFO L175 Difference]: Start difference. First operand has 317 places, 889 transitions, 18139 flow. Second operand 32 states and 8250 transitions. [2023-08-30 18:55:56,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1175 transitions, 24593 flow [2023-08-30 18:56:02,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1175 transitions, 23450 flow, removed 64 selfloop flow, removed 19 redundant places. [2023-08-30 18:56:02,913 INFO L231 Difference]: Finished difference. Result has 339 places, 918 transitions, 19231 flow [2023-08-30 18:56:02,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=17119, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=19231, PETRI_PLACES=339, PETRI_TRANSITIONS=918} [2023-08-30 18:56:02,914 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 305 predicate places. [2023-08-30 18:56:02,914 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 918 transitions, 19231 flow [2023-08-30 18:56:02,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:02,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:02,916 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:56:02,930 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 18:56:03,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 18:56:03,122 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 18:56:03,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash -940151146, now seen corresponding path program 12 times [2023-08-30 18:56:03,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:03,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80725188] [2023-08-30 18:56:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:03,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:56:04,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:04,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80725188] [2023-08-30 18:56:04,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80725188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:04,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418424426] [2023-08-30 18:56:04,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:56:04,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:04,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:04,094 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 18:56:04,095 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 18:56:04,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 18:56:04,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:04,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 18:56:04,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:04,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:04,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:56:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:56:04,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:05,447 INFO L321 Elim1Store]: treesize reduction 36, result has 70.2 percent of original size [2023-08-30 18:56:05,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 100 [2023-08-30 18:56:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:56:05,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418424426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:05,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:05,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 31 [2023-08-30 18:56:05,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241226709] [2023-08-30 18:56:05,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:05,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 18:56:05,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:05,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 18:56:05,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2023-08-30 18:56:07,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 661 [2023-08-30 18:56:07,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 918 transitions, 19231 flow. Second operand has 32 states, 32 states have (on average 247.21875) internal successors, (7911), 32 states have internal predecessors, (7911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:07,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:07,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 661 [2023-08-30 18:56:07,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:16,171 INFO L130 PetriNetUnfolder]: 13874/20059 cut-off events. [2023-08-30 18:56:16,171 INFO L131 PetriNetUnfolder]: For 982859/982859 co-relation queries the response was YES. [2023-08-30 18:56:16,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215977 conditions, 20059 events. 13874/20059 cut-off events. For 982859/982859 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 121907 event pairs, 2643 based on Foata normal form. 2/20061 useless extension candidates. Maximal degree in co-relation 215765. Up to 7046 conditions per place. [2023-08-30 18:56:16,713 INFO L137 encePairwiseOnDemand]: 644/661 looper letters, 569 selfloop transitions, 622 changer transitions 5/1196 dead transitions. [2023-08-30 18:56:16,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1196 transitions, 25309 flow [2023-08-30 18:56:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 18:56:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 18:56:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 8413 transitions. [2023-08-30 18:56:16,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856874340989318 [2023-08-30 18:56:16,718 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 8413 transitions. [2023-08-30 18:56:16,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 8413 transitions. [2023-08-30 18:56:16,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:16,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 8413 transitions. [2023-08-30 18:56:16,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 254.93939393939394) internal successors, (8413), 33 states have internal predecessors, (8413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:16,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 661.0) internal successors, (22474), 34 states have internal predecessors, (22474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:16,734 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 661.0) internal successors, (22474), 34 states have internal predecessors, (22474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:16,734 INFO L175 Difference]: Start difference. First operand has 339 places, 918 transitions, 19231 flow. Second operand 33 states and 8413 transitions. [2023-08-30 18:56:16,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1196 transitions, 25309 flow [2023-08-30 18:56:24,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1196 transitions, 24269 flow, removed 136 selfloop flow, removed 20 redundant places. [2023-08-30 18:56:24,114 INFO L231 Difference]: Finished difference. Result has 358 places, 961 transitions, 20837 flow [2023-08-30 18:56:24,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=18255, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=20837, PETRI_PLACES=358, PETRI_TRANSITIONS=961} [2023-08-30 18:56:24,116 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 324 predicate places. [2023-08-30 18:56:24,116 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 961 transitions, 20837 flow [2023-08-30 18:56:24,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 247.21875) internal successors, (7911), 32 states have internal predecessors, (7911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:24,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:24,118 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:56:24,124 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 18:56:24,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:24,319 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:56:24,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1811565466, now seen corresponding path program 13 times [2023-08-30 18:56:24,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:24,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498733771] [2023-08-30 18:56:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:24,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:56:25,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:25,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498733771] [2023-08-30 18:56:25,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498733771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:25,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884801630] [2023-08-30 18:56:25,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:56:25,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:25,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:25,297 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 18:56:25,326 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 18:56:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:25,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:56:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:25,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:25,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:56:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:56:25,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:26,305 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:56:26,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:56:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:56:26,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884801630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:26,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:26,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2023-08-30 18:56:26,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677640782] [2023-08-30 18:56:26,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:26,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:56:26,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:26,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:56:26,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-08-30 18:56:28,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 18:56:28,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 961 transitions, 20837 flow. Second operand has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:28,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:28,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 18:56:28,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:35,445 INFO L130 PetriNetUnfolder]: 13874/20058 cut-off events. [2023-08-30 18:56:35,445 INFO L131 PetriNetUnfolder]: For 1013832/1013832 co-relation queries the response was YES. [2023-08-30 18:56:35,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222470 conditions, 20058 events. 13874/20058 cut-off events. For 1013832/1013832 co-relation queries the response was YES. Maximal size of possible extension queue 1032. Compared 121902 event pairs, 3012 based on Foata normal form. 1/20059 useless extension candidates. Maximal degree in co-relation 222255. Up to 7624 conditions per place. [2023-08-30 18:56:35,875 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 579 selfloop transitions, 530 changer transitions 1/1110 dead transitions. [2023-08-30 18:56:35,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1110 transitions, 24921 flow [2023-08-30 18:56:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 18:56:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 18:56:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4650 transitions. [2023-08-30 18:56:35,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908219868885527 [2023-08-30 18:56:35,879 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4650 transitions. [2023-08-30 18:56:35,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4650 transitions. [2023-08-30 18:56:35,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:35,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4650 transitions. [2023-08-30 18:56:35,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 258.3333333333333) internal successors, (4650), 18 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:35,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 661.0) internal successors, (12559), 19 states have internal predecessors, (12559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:35,893 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 661.0) internal successors, (12559), 19 states have internal predecessors, (12559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:35,893 INFO L175 Difference]: Start difference. First operand has 358 places, 961 transitions, 20837 flow. Second operand 18 states and 4650 transitions. [2023-08-30 18:56:35,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1110 transitions, 24921 flow [2023-08-30 18:56:44,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1110 transitions, 23980 flow, removed 190 selfloop flow, removed 15 redundant places. [2023-08-30 18:56:44,342 INFO L231 Difference]: Finished difference. Result has 361 places, 963 transitions, 21037 flow [2023-08-30 18:56:44,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=19896, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21037, PETRI_PLACES=361, PETRI_TRANSITIONS=963} [2023-08-30 18:56:44,343 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 327 predicate places. [2023-08-30 18:56:44,343 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 963 transitions, 21037 flow [2023-08-30 18:56:44,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:44,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:44,344 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:56:44,349 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 18:56:44,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:44,545 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:56:44,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:44,545 INFO L85 PathProgramCache]: Analyzing trace with hash 320772784, now seen corresponding path program 14 times [2023-08-30 18:56:44,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:44,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279010405] [2023-08-30 18:56:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:44,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:56:45,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:45,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279010405] [2023-08-30 18:56:45,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279010405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:45,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426353362] [2023-08-30 18:56:45,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:56:45,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:45,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:45,473 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 18:56:45,477 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 18:56:45,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:56:45,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:45,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 18:56:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:46,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:46,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-08-30 18:56:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:56:46,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:46,684 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:56:46,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:56:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:56:46,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426353362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:46,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:46,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 35 [2023-08-30 18:56:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339164765] [2023-08-30 18:56:46,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:46,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 18:56:46,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 18:56:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 18:56:49,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 18:56:49,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 963 transitions, 21037 flow. Second operand has 36 states, 36 states have (on average 250.11111111111111) internal successors, (9004), 36 states have internal predecessors, (9004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:49,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:49,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 18:56:49,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:58,713 INFO L130 PetriNetUnfolder]: 15561/22588 cut-off events. [2023-08-30 18:56:58,714 INFO L131 PetriNetUnfolder]: For 1168704/1168704 co-relation queries the response was YES. [2023-08-30 18:56:58,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252656 conditions, 22588 events. 15561/22588 cut-off events. For 1168704/1168704 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 140884 event pairs, 3718 based on Foata normal form. 2/22590 useless extension candidates. Maximal degree in co-relation 252440. Up to 15738 conditions per place. [2023-08-30 18:56:59,120 INFO L137 encePairwiseOnDemand]: 645/661 looper letters, 668 selfloop transitions, 583 changer transitions 2/1253 dead transitions. [2023-08-30 18:56:59,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1253 transitions, 29150 flow [2023-08-30 18:56:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 18:56:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 18:56:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 6948 transitions. [2023-08-30 18:56:59,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38930912758446795 [2023-08-30 18:56:59,124 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 6948 transitions. [2023-08-30 18:56:59,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 6948 transitions. [2023-08-30 18:56:59,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:59,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 6948 transitions. [2023-08-30 18:56:59,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 257.3333333333333) internal successors, (6948), 27 states have internal predecessors, (6948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:59,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 661.0) internal successors, (18508), 28 states have internal predecessors, (18508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:59,142 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 661.0) internal successors, (18508), 28 states have internal predecessors, (18508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:59,142 INFO L175 Difference]: Start difference. First operand has 361 places, 963 transitions, 21037 flow. Second operand 27 states and 6948 transitions. [2023-08-30 18:56:59,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1253 transitions, 29150 flow [2023-08-30 18:57:07,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1253 transitions, 27999 flow, removed 32 selfloop flow, removed 16 redundant places. [2023-08-30 18:57:07,918 INFO L231 Difference]: Finished difference. Result has 378 places, 1063 transitions, 24510 flow [2023-08-30 18:57:07,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=20035, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=24510, PETRI_PLACES=378, PETRI_TRANSITIONS=1063} [2023-08-30 18:57:07,919 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 344 predicate places. [2023-08-30 18:57:07,920 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1063 transitions, 24510 flow [2023-08-30 18:57:07,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 250.11111111111111) internal successors, (9004), 36 states have internal predecessors, (9004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:07,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:07,921 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:57:07,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:08,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:08,127 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:57:08,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:08,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1905575500, now seen corresponding path program 15 times [2023-08-30 18:57:08,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:08,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586968791] [2023-08-30 18:57:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:57:08,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586968791] [2023-08-30 18:57:08,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586968791] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:08,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872364939] [2023-08-30 18:57:08,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:57:08,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:08,926 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 18:57:08,927 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 18:57:09,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 18:57:09,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:57:09,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:57:09,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:09,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:57:09,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:57:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:57:09,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:10,162 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:57:10,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:57:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:57:10,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872364939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:10,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:10,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 32 [2023-08-30 18:57:10,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231558659] [2023-08-30 18:57:10,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:10,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 18:57:10,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:10,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 18:57:10,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 18:57:12,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 18:57:12,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1063 transitions, 24510 flow. Second operand has 33 states, 33 states have (on average 250.06060606060606) internal successors, (8252), 33 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:12,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:12,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 18:57:12,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:20,472 INFO L130 PetriNetUnfolder]: 15725/22834 cut-off events. [2023-08-30 18:57:20,472 INFO L131 PetriNetUnfolder]: For 1234863/1234863 co-relation queries the response was YES. [2023-08-30 18:57:20,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261881 conditions, 22834 events. 15725/22834 cut-off events. For 1234863/1234863 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 142611 event pairs, 3812 based on Foata normal form. 2/22836 useless extension candidates. Maximal degree in co-relation 261658. Up to 16860 conditions per place. [2023-08-30 18:57:20,808 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 596 selfloop transitions, 601 changer transitions 1/1198 dead transitions. [2023-08-30 18:57:20,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1198 transitions, 28864 flow [2023-08-30 18:57:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:57:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:57:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5649 transitions. [2023-08-30 18:57:20,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884610094897538 [2023-08-30 18:57:20,812 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5649 transitions. [2023-08-30 18:57:20,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5649 transitions. [2023-08-30 18:57:20,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:20,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5649 transitions. [2023-08-30 18:57:20,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 256.77272727272725) internal successors, (5649), 22 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:20,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:20,826 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:20,826 INFO L175 Difference]: Start difference. First operand has 378 places, 1063 transitions, 24510 flow. Second operand 22 states and 5649 transitions. [2023-08-30 18:57:20,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1198 transitions, 28864 flow [2023-08-30 18:57:31,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1198 transitions, 28231 flow, removed 146 selfloop flow, removed 13 redundant places. [2023-08-30 18:57:31,102 INFO L231 Difference]: Finished difference. Result has 387 places, 1070 transitions, 25367 flow [2023-08-30 18:57:31,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=23929, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25367, PETRI_PLACES=387, PETRI_TRANSITIONS=1070} [2023-08-30 18:57:31,103 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 353 predicate places. [2023-08-30 18:57:31,103 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1070 transitions, 25367 flow [2023-08-30 18:57:31,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 250.06060606060606) internal successors, (8252), 33 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:31,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:31,105 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 18:57:31,112 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 18:57:31,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 18:57:31,309 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:57:31,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1669845044, now seen corresponding path program 16 times [2023-08-30 18:57:31,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:31,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073023485] [2023-08-30 18:57:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:31,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 18:57:33,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:33,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073023485] [2023-08-30 18:57:33,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073023485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:33,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547827523] [2023-08-30 18:57:33,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:57:33,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:33,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:33,467 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 18:57:33,469 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 18:57:33,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:57:33,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:57:33,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:57:33,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:34,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:57:34,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:57:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:57:34,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:34,861 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 18:57:34,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 18:57:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:57:35,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547827523] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:35,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:35,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 10] total 50 [2023-08-30 18:57:35,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553341639] [2023-08-30 18:57:35,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:35,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-30 18:57:35,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:35,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-30 18:57:35,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2023-08-30 18:57:42,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 661 [2023-08-30 18:57:42,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1070 transitions, 25367 flow. Second operand has 51 states, 51 states have (on average 227.86274509803923) internal successors, (11621), 51 states have internal predecessors, (11621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:42,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:42,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 661 [2023-08-30 18:57:42,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:58:20,174 INFO L130 PetriNetUnfolder]: 63065/91624 cut-off events. [2023-08-30 18:58:20,175 INFO L131 PetriNetUnfolder]: For 5143640/5143640 co-relation queries the response was YES. [2023-08-30 18:58:23,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063758 conditions, 91624 events. 63065/91624 cut-off events. For 5143640/5143640 co-relation queries the response was YES. Maximal size of possible extension queue 4289. Compared 682428 event pairs, 16156 based on Foata normal form. 8/91632 useless extension candidates. Maximal degree in co-relation 1063480. Up to 19441 conditions per place. [2023-08-30 18:58:23,557 INFO L137 encePairwiseOnDemand]: 643/661 looper letters, 2463 selfloop transitions, 2233 changer transitions 4/4700 dead transitions. [2023-08-30 18:58:23,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 4700 transitions, 117214 flow [2023-08-30 18:58:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-30 18:58:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-30 18:58:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 16952 transitions. [2023-08-30 18:58:23,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35619431837283577 [2023-08-30 18:58:23,566 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 16952 transitions. [2023-08-30 18:58:23,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 16952 transitions. [2023-08-30 18:58:23,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:58:23,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 16952 transitions. [2023-08-30 18:58:23,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 235.44444444444446) internal successors, (16952), 72 states have internal predecessors, (16952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:23,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 661.0) internal successors, (48253), 73 states have internal predecessors, (48253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:23,728 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 661.0) internal successors, (48253), 73 states have internal predecessors, (48253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:23,729 INFO L175 Difference]: Start difference. First operand has 387 places, 1070 transitions, 25367 flow. Second operand 72 states and 16952 transitions. [2023-08-30 18:58:23,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 4700 transitions, 117214 flow [2023-08-30 19:02:04,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 4700 transitions, 114814 flow, removed 256 selfloop flow, removed 15 redundant places. [2023-08-30 19:02:04,527 INFO L231 Difference]: Finished difference. Result has 451 places, 2741 transitions, 77784 flow [2023-08-30 19:02:04,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=24772, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=565, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=77784, PETRI_PLACES=451, PETRI_TRANSITIONS=2741} [2023-08-30 19:02:04,529 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 417 predicate places. [2023-08-30 19:02:04,529 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 2741 transitions, 77784 flow [2023-08-30 19:02:04,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 227.86274509803923) internal successors, (11621), 51 states have internal predecessors, (11621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:04,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:04,531 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 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 19:02:04,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:04,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 19:02:04,732 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:02:04,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash -341568430, now seen corresponding path program 17 times [2023-08-30 19:02:04,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:04,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039848776] [2023-08-30 19:02:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:04,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:02:05,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039848776] [2023-08-30 19:02:05,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039848776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518831056] [2023-08-30 19:02:05,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:02:05,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:05,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:05,551 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:05,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 19:02:06,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:02:06,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:06,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 19:02:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:06,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:06,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 19:02:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:02:06,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:06,864 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-30 19:02:06,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-30 19:02:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 19:02:06,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518831056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:06,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:06,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 31 [2023-08-30 19:02:06,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762778288] [2023-08-30 19:02:06,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:06,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 19:02:06,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:06,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 19:02:06,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-08-30 19:02:08,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-08-30 19:02:08,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 2741 transitions, 77784 flow. Second operand has 32 states, 32 states have (on average 250.09375) internal successors, (8003), 32 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:08,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:08,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-08-30 19:02:08,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:57,658 INFO L130 PetriNetUnfolder]: 63061/91616 cut-off events. [2023-08-30 19:02:57,658 INFO L131 PetriNetUnfolder]: For 5097684/5097684 co-relation queries the response was YES. [2023-08-30 19:03:00,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067844 conditions, 91616 events. 63061/91616 cut-off events. For 5097684/5097684 co-relation queries the response was YES. Maximal size of possible extension queue 4289. Compared 681722 event pairs, 15774 based on Foata normal form. 8/91624 useless extension candidates. Maximal degree in co-relation 1067528. Up to 67344 conditions per place. [2023-08-30 19:03:01,306 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 626 selfloop transitions, 2244 changer transitions 1/2871 dead transitions. [2023-08-30 19:03:01,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 2871 transitions, 85266 flow [2023-08-30 19:03:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 19:03:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 19:03:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5899 transitions. [2023-08-30 19:03:01,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38801552325198974 [2023-08-30 19:03:01,310 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5899 transitions. [2023-08-30 19:03:01,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5899 transitions. [2023-08-30 19:03:01,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:01,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5899 transitions. [2023-08-30 19:03:01,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 256.4782608695652) internal successors, (5899), 23 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:01,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:01,321 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:01,321 INFO L175 Difference]: Start difference. First operand has 451 places, 2741 transitions, 77784 flow. Second operand 23 states and 5899 transitions. [2023-08-30 19:03:01,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 2871 transitions, 85266 flow Killed by 15