./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i --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/goblint-regression/28-race_reach_79-equ_racefree.i -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 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc --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 18:11:36,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:11:36,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:11:36,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:11:36,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:11:36,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:11:36,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:11:36,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:11:36,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:11:36,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:11:36,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:11:36,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:11:36,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:11:36,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:11:36,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:11:36,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:11:36,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:11:36,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:11:36,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:11:36,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:11:37,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:11:37,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:11:37,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:11:37,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:11:37,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:11:37,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:11:37,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:11:37,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:11:37,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:11:37,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:11:37,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:11:37,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:11:37,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:11:37,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:11:37,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:11:37,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:11:37,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:11:37,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:11:37,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:11:37,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:11:37,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:11:37,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:11:37,049 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:11:37,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:11:37,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:11:37,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:11:37,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:11:37,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:11:37,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:11:37,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:11:37,053 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:11:37,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:11:37,054 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:11:37,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:11:37,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:11:37,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:11:37,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:11:37,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:11:37,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:11:37,056 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:11:37,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:11:37,056 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:11:37,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:11:37,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:11:37,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:11:37,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:11:37,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:11:37,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:11:37,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:11:37,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:11:37,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:11:37,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:11:37,059 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:11:37,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:11:37,059 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:11:37,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:11:37,059 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:11:37,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:11:37,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:11:37,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:11:37,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:11:37,415 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:11:37,415 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:11:37,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-30 18:11:38,612 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:11:38,863 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:11:38,870 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-30 18:11:38,895 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/334c27bf6/bdf40c225c624480ba2e380240a2da43/FLAG5e07212ce [2023-08-30 18:11:38,917 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/334c27bf6/bdf40c225c624480ba2e380240a2da43 [2023-08-30 18:11:38,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:11:38,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:11:38,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:11:38,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:11:38,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:11:38,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:11:38" (1/1) ... [2023-08-30 18:11:38,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635f568d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:38, skipping insertion in model container [2023-08-30 18:11:38,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:11:38" (1/1) ... [2023-08-30 18:11:38,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:11:38,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:11:39,449 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2023-08-30 18:11:39,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:11:39,508 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:11:39,564 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2023-08-30 18:11:39,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:11:39,644 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:11:39,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39 WrapperNode [2023-08-30 18:11:39,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:11:39,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:11:39,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:11:39,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:11:39,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,711 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 204 [2023-08-30 18:11:39,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:11:39,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:11:39,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:11:39,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:11:39,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:11:39,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:11:39,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:11:39,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:11:39,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:11:39,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:39,810 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 18:11:39,828 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 18:11:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:11:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:11:39,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:11:39,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:11:39,866 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 18:11:39,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:11:39,866 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 18:11:39,866 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 18:11:39,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:11:39,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:11:39,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:11:39,868 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 18:11:40,062 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:11:40,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:11:40,277 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:11:40,287 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:11:40,289 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-30 18:11:40,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:11:40 BoogieIcfgContainer [2023-08-30 18:11:40,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:11:40,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:11:40,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:11:40,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:11:40,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:11:38" (1/3) ... [2023-08-30 18:11:40,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e06598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:11:40, skipping insertion in model container [2023-08-30 18:11:40,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39" (2/3) ... [2023-08-30 18:11:40,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e06598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:11:40, skipping insertion in model container [2023-08-30 18:11:40,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:11:40" (3/3) ... [2023-08-30 18:11:40,301 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2023-08-30 18:11:40,309 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:11:40,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:11:40,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 18:11:40,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:11:40,380 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 18:11:40,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 410 flow [2023-08-30 18:11:40,573 INFO L130 PetriNetUnfolder]: 43/271 cut-off events. [2023-08-30 18:11:40,573 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 18:11:40,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 271 events. 43/271 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 823 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-30 18:11:40,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 201 transitions, 410 flow [2023-08-30 18:11:40,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:40,597 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:40,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:40,618 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:40,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:40,675 INFO L130 PetriNetUnfolder]: 41/264 cut-off events. [2023-08-30 18:11:40,676 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:40,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 41/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 803 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-30 18:11:40,687 INFO L119 LiptonReduction]: Number of co-enabled transitions 8664 [2023-08-30 18:11:48,120 INFO L134 LiptonReduction]: Checked pairs total: 18412 [2023-08-30 18:11:48,120 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-30 18:11:48,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:11:48,140 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;@ca201ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:11:48,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 18:11:48,145 INFO L130 PetriNetUnfolder]: 7/29 cut-off events. [2023-08-30 18:11:48,145 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:48,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:48,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 18:11:48,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:48,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash 733617857, now seen corresponding path program 1 times [2023-08-30 18:11:48,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:48,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371697817] [2023-08-30 18:11:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:48,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:48,539 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 18:11:48,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:48,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371697817] [2023-08-30 18:11:48,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371697817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:48,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:48,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:11:48,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316994113] [2023-08-30 18:11:48,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:48,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:11:48,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:48,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:11:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:11:48,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 367 [2023-08-30 18:11:48,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 64 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:48,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:48,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 367 [2023-08-30 18:11:48,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:48,750 INFO L130 PetriNetUnfolder]: 274/651 cut-off events. [2023-08-30 18:11:48,750 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:48,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 651 events. 274/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3505 event pairs, 0 based on Foata normal form. 119/685 useless extension candidates. Maximal degree in co-relation 1175. Up to 529 conditions per place. [2023-08-30 18:11:48,754 INFO L137 encePairwiseOnDemand]: 342/367 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-30 18:11:48,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 225 flow [2023-08-30 18:11:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:11:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:11:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-30 18:11:48,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367847411444142 [2023-08-30 18:11:48,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-30 18:11:48,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-30 18:11:48,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:48,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-30 18:11:48,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:48,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:48,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:48,786 INFO L175 Difference]: Start difference. First operand has 44 places, 64 transitions, 133 flow. Second operand 3 states and 591 transitions. [2023-08-30 18:11:48,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 225 flow [2023-08-30 18:11:48,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:11:48,790 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 97 flow [2023-08-30 18:11:48,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-30 18:11:48,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-30 18:11:48,795 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 97 flow [2023-08-30 18:11:48,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:48,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:48,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:48,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:11:48,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:48,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash 423867485, now seen corresponding path program 1 times [2023-08-30 18:11:48,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:48,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470853846] [2023-08-30 18:11:48,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:48,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:49,062 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 18:11:49,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:49,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470853846] [2023-08-30 18:11:49,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470853846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:49,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:49,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:11:49,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442342158] [2023-08-30 18:11:49,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:49,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:11:49,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:49,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:11:49,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:11:49,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 367 [2023-08-30 18:11:49,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:49,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:49,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 367 [2023-08-30 18:11:49,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:49,336 INFO L130 PetriNetUnfolder]: 301/688 cut-off events. [2023-08-30 18:11:49,336 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 18:11:49,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 688 events. 301/688 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3609 event pairs, 130 based on Foata normal form. 0/622 useless extension candidates. Maximal degree in co-relation 1355. Up to 367 conditions per place. [2023-08-30 18:11:49,339 INFO L137 encePairwiseOnDemand]: 361/367 looper letters, 37 selfloop transitions, 3 changer transitions 25/72 dead transitions. [2023-08-30 18:11:49,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 72 transitions, 290 flow [2023-08-30 18:11:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:11:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:11:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 717 transitions. [2023-08-30 18:11:49,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884196185286104 [2023-08-30 18:11:49,342 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 717 transitions. [2023-08-30 18:11:49,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 717 transitions. [2023-08-30 18:11:49,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:49,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 717 transitions. [2023-08-30 18:11:49,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:49,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:49,348 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:49,348 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 97 flow. Second operand 4 states and 717 transitions. [2023-08-30 18:11:49,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 72 transitions, 290 flow [2023-08-30 18:11:49,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 72 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 18:11:49,350 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 103 flow [2023-08-30 18:11:49,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-08-30 18:11:49,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2023-08-30 18:11:49,351 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 103 flow [2023-08-30 18:11:49,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:49,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:49,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:49,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 18:11:49,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:49,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash 290818371, now seen corresponding path program 1 times [2023-08-30 18:11:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:49,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186755314] [2023-08-30 18:11:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:49,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:49,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186755314] [2023-08-30 18:11:49,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186755314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:49,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306203767] [2023-08-30 18:11:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:49,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:49,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:49,413 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 18:11:49,441 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 18:11:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:49,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:11:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:50,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:50,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306203767] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:50,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:50,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 18:11:50,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356279909] [2023-08-30 18:11:50,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:50,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:11:50,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:50,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:11:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:11:50,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 367 [2023-08-30 18:11:50,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 170.0) internal successors, (1020), 6 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:50,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:50,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 367 [2023-08-30 18:11:50,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:50,453 INFO L130 PetriNetUnfolder]: 32/89 cut-off events. [2023-08-30 18:11:50,454 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 18:11:50,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 89 events. 32/89 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 219 event pairs, 9 based on Foata normal form. 17/103 useless extension candidates. Maximal degree in co-relation 204. Up to 66 conditions per place. [2023-08-30 18:11:50,454 INFO L137 encePairwiseOnDemand]: 364/367 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-30 18:11:50,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 165 flow [2023-08-30 18:11:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:11:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:11:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 708 transitions. [2023-08-30 18:11:50,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4822888283378747 [2023-08-30 18:11:50,457 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 708 transitions. [2023-08-30 18:11:50,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 708 transitions. [2023-08-30 18:11:50,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:50,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 708 transitions. [2023-08-30 18:11:50,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:50,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:50,463 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:50,464 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 103 flow. Second operand 4 states and 708 transitions. [2023-08-30 18:11:50,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 165 flow [2023-08-30 18:11:50,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 37 transitions, 147 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 18:11:50,465 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-30 18:11:50,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-30 18:11:50,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -17 predicate places. [2023-08-30 18:11:50,466 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-30 18:11:50,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 170.0) internal successors, (1020), 6 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:50,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 18:11:50,470 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 18:11:50,470 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 18:11:50,480 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 18:11:50,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:50,677 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 18:11:50,679 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 18:11:50,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 410 flow [2023-08-30 18:11:50,711 INFO L130 PetriNetUnfolder]: 43/271 cut-off events. [2023-08-30 18:11:50,711 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 18:11:50,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 271 events. 43/271 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 823 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-30 18:11:50,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 201 transitions, 410 flow [2023-08-30 18:11:50,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:50,715 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:50,715 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:50,716 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:50,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:50,734 INFO L130 PetriNetUnfolder]: 41/264 cut-off events. [2023-08-30 18:11:50,735 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:50,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 41/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 803 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-30 18:11:50,744 INFO L119 LiptonReduction]: Number of co-enabled transitions 8664 [2023-08-30 18:11:55,805 INFO L134 LiptonReduction]: Checked pairs total: 17867 [2023-08-30 18:11:55,805 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-30 18:11:55,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:11:55,808 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;@ca201ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:11:55,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 18:11:55,811 INFO L130 PetriNetUnfolder]: 15/48 cut-off events. [2023-08-30 18:11:55,812 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:55,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:55,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 18:11:55,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:11:55,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:55,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1729354892, now seen corresponding path program 1 times [2023-08-30 18:11:55,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:55,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965528971] [2023-08-30 18:11:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:55,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:11:55,838 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:11:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:11:55,883 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:11:55,884 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:11:55,884 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 18:11:55,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 18:11:55,884 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 18:11:55,885 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 18:11:55,886 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:11:55,886 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 18:11:55,925 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 18:11:55,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 260 transitions, 538 flow [2023-08-30 18:11:55,970 INFO L130 PetriNetUnfolder]: 72/424 cut-off events. [2023-08-30 18:11:55,970 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 18:11:55,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 72/424 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1596 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 273. Up to 12 conditions per place. [2023-08-30 18:11:55,974 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 260 transitions, 538 flow [2023-08-30 18:11:55,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 258 transitions, 534 flow [2023-08-30 18:11:55,978 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:55,978 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-30 18:11:55,979 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-30 18:11:55,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 258 transitions, 534 flow [2023-08-30 18:11:56,031 INFO L130 PetriNetUnfolder]: 71/422 cut-off events. [2023-08-30 18:11:56,032 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 18:11:56,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 422 events. 71/422 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1612 event pairs, 0 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2023-08-30 18:11:56,049 INFO L119 LiptonReduction]: Number of co-enabled transitions 25080 [2023-08-30 18:12:01,026 INFO L134 LiptonReduction]: Checked pairs total: 52594 [2023-08-30 18:12:01,026 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-30 18:12:01,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:12:01,029 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;@ca201ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:12:01,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:12:01,031 INFO L130 PetriNetUnfolder]: 6/23 cut-off events. [2023-08-30 18:12:01,032 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:12:01,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:01,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 18:12:01,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:01,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:01,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1384375003, now seen corresponding path program 1 times [2023-08-30 18:12:01,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:01,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325529385] [2023-08-30 18:12:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:01,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:01,072 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 18:12:01,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:01,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325529385] [2023-08-30 18:12:01,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325529385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:01,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:01,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:12:01,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888239597] [2023-08-30 18:12:01,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:01,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:12:01,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:01,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:12:01,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:12:01,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 462 [2023-08-30 18:12:01,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:01,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:01,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 462 [2023-08-30 18:12:01,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:02,157 INFO L130 PetriNetUnfolder]: 8903/13936 cut-off events. [2023-08-30 18:12:02,157 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2023-08-30 18:12:02,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26898 conditions, 13936 events. 8903/13936 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 93113 event pairs, 6020 based on Foata normal form. 3325/15003 useless extension candidates. Maximal degree in co-relation 11579. Up to 12844 conditions per place. [2023-08-30 18:12:02,217 INFO L137 encePairwiseOnDemand]: 428/462 looper letters, 66 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 18:12:02,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 320 flow [2023-08-30 18:12:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:12:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:12:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-30 18:12:02,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425685425685426 [2023-08-30 18:12:02,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-30 18:12:02,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-30 18:12:02,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:02,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-30 18:12:02,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:02,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:02,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:02,226 INFO L175 Difference]: Start difference. First operand has 67 places, 98 transitions, 214 flow. Second operand 3 states and 752 transitions. [2023-08-30 18:12:02,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 320 flow [2023-08-30 18:12:02,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:12:02,235 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 164 flow [2023-08-30 18:12:02,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-08-30 18:12:02,239 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-30 18:12:02,239 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 164 flow [2023-08-30 18:12:02,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:02,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:02,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:02,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 18:12:02,241 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:02,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1508875475, now seen corresponding path program 1 times [2023-08-30 18:12:02,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:02,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959263374] [2023-08-30 18:12:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:02,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:02,388 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 18:12:02,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:02,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959263374] [2023-08-30 18:12:02,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959263374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:02,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:02,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:12:02,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511724228] [2023-08-30 18:12:02,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:02,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:12:02,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:12:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:12:02,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 462 [2023-08-30 18:12:02,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:02,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:02,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 462 [2023-08-30 18:12:02,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:03,801 INFO L130 PetriNetUnfolder]: 10858/17603 cut-off events. [2023-08-30 18:12:03,802 INFO L131 PetriNetUnfolder]: For 754/754 co-relation queries the response was YES. [2023-08-30 18:12:03,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35008 conditions, 17603 events. 10858/17603 cut-off events. For 754/754 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 128189 event pairs, 3224 based on Foata normal form. 0/15413 useless extension candidates. Maximal degree in co-relation 34900. Up to 10872 conditions per place. [2023-08-30 18:12:03,875 INFO L137 encePairwiseOnDemand]: 449/462 looper letters, 115 selfloop transitions, 12 changer transitions 8/150 dead transitions. [2023-08-30 18:12:03,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 150 transitions, 626 flow [2023-08-30 18:12:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:12:03,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:12:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 961 transitions. [2023-08-30 18:12:03,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.520021645021645 [2023-08-30 18:12:03,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 961 transitions. [2023-08-30 18:12:03,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 961 transitions. [2023-08-30 18:12:03,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:03,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 961 transitions. [2023-08-30 18:12:03,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 240.25) internal successors, (961), 4 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:03,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:03,887 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:03,887 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 164 flow. Second operand 4 states and 961 transitions. [2023-08-30 18:12:03,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 150 transitions, 626 flow [2023-08-30 18:12:03,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 150 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:12:03,891 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 262 flow [2023-08-30 18:12:03,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2023-08-30 18:12:03,892 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-30 18:12:03,892 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 262 flow [2023-08-30 18:12:03,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:03,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:03,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:03,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 18:12:03,894 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:03,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:03,894 INFO L85 PathProgramCache]: Analyzing trace with hash 283198393, now seen corresponding path program 1 times [2023-08-30 18:12:03,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:03,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845269731] [2023-08-30 18:12:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:03,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:03,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845269731] [2023-08-30 18:12:03,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845269731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:03,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608301182] [2023-08-30 18:12:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:03,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:03,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:03,943 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 18:12:03,949 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 18:12:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:04,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:12:04,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:04,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:04,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608301182] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:04,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:04,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 18:12:04,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095944978] [2023-08-30 18:12:04,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:04,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:12:04,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:12:04,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:12:04,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 462 [2023-08-30 18:12:04,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:04,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:04,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 462 [2023-08-30 18:12:04,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:04,391 INFO L130 PetriNetUnfolder]: 1284/2474 cut-off events. [2023-08-30 18:12:04,391 INFO L131 PetriNetUnfolder]: For 1050/1050 co-relation queries the response was YES. [2023-08-30 18:12:04,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6228 conditions, 2474 events. 1284/2474 cut-off events. For 1050/1050 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15959 event pairs, 34 based on Foata normal form. 296/2674 useless extension candidates. Maximal degree in co-relation 2262. Up to 1557 conditions per place. [2023-08-30 18:12:04,401 INFO L137 encePairwiseOnDemand]: 459/462 looper letters, 66 selfloop transitions, 3 changer transitions 22/100 dead transitions. [2023-08-30 18:12:04,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 100 transitions, 506 flow [2023-08-30 18:12:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:12:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:12:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1146 transitions. [2023-08-30 18:12:04,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4961038961038961 [2023-08-30 18:12:04,405 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1146 transitions. [2023-08-30 18:12:04,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1146 transitions. [2023-08-30 18:12:04,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:04,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1146 transitions. [2023-08-30 18:12:04,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.2) internal successors, (1146), 5 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:04,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 462.0) internal successors, (2772), 6 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:04,414 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 462.0) internal successors, (2772), 6 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:04,414 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 262 flow. Second operand 5 states and 1146 transitions. [2023-08-30 18:12:04,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 100 transitions, 506 flow [2023-08-30 18:12:04,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 100 transitions, 504 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 18:12:04,419 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 128 flow [2023-08-30 18:12:04,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-08-30 18:12:04,420 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-30 18:12:04,420 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 128 flow [2023-08-30 18:12:04,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:04,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:04,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:04,431 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 18:12:04,627 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,SelfDestructingSolverStorable6 [2023-08-30 18:12:04,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:04,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:04,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1390837300, now seen corresponding path program 1 times [2023-08-30 18:12:04,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:04,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235413355] [2023-08-30 18:12:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:04,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:04,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235413355] [2023-08-30 18:12:04,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235413355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312185107] [2023-08-30 18:12:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:04,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:04,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:04,792 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 18:12:04,795 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 18:12:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:04,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 18:12:04,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:04,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:12:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:12:05,026 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 18:12:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:05,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:12:05,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312185107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:05,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:12:05,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-30 18:12:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458298976] [2023-08-30 18:12:05,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:05,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:12:05,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:05,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:12:05,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:12:05,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 462 [2023-08-30 18:12:05,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 195.8) internal successors, (979), 5 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:05,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 462 [2023-08-30 18:12:05,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:05,246 INFO L130 PetriNetUnfolder]: 508/968 cut-off events. [2023-08-30 18:12:05,247 INFO L131 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2023-08-30 18:12:05,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2462 conditions, 968 events. 508/968 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4846 event pairs, 177 based on Foata normal form. 108/989 useless extension candidates. Maximal degree in co-relation 949. Up to 592 conditions per place. [2023-08-30 18:12:05,251 INFO L137 encePairwiseOnDemand]: 451/462 looper letters, 33 selfloop transitions, 11 changer transitions 2/52 dead transitions. [2023-08-30 18:12:05,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 259 flow [2023-08-30 18:12:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:12:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:12:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 822 transitions. [2023-08-30 18:12:05,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2023-08-30 18:12:05,254 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 822 transitions. [2023-08-30 18:12:05,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 822 transitions. [2023-08-30 18:12:05,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:05,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 822 transitions. [2023-08-30 18:12:05,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,259 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 128 flow. Second operand 4 states and 822 transitions. [2023-08-30 18:12:05,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 259 flow [2023-08-30 18:12:05,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 242 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 18:12:05,263 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 137 flow [2023-08-30 18:12:05,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-30 18:12:05,264 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -14 predicate places. [2023-08-30 18:12:05,264 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 137 flow [2023-08-30 18:12:05,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.8) internal successors, (979), 5 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:05,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:05,271 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 18:12:05,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:05,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:05,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash -445906667, now seen corresponding path program 1 times [2023-08-30 18:12:05,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:05,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067602842] [2023-08-30 18:12:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:05,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:05,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:05,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067602842] [2023-08-30 18:12:05,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067602842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:05,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:05,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:12:05,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565935264] [2023-08-30 18:12:05,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:05,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:12:05,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:05,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:12:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:12:05,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 462 [2023-08-30 18:12:05,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:05,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 462 [2023-08-30 18:12:05,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:05,710 INFO L130 PetriNetUnfolder]: 351/808 cut-off events. [2023-08-30 18:12:05,710 INFO L131 PetriNetUnfolder]: For 400/400 co-relation queries the response was YES. [2023-08-30 18:12:05,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1985 conditions, 808 events. 351/808 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4733 event pairs, 86 based on Foata normal form. 33/784 useless extension candidates. Maximal degree in co-relation 930. Up to 394 conditions per place. [2023-08-30 18:12:05,714 INFO L137 encePairwiseOnDemand]: 454/462 looper letters, 41 selfloop transitions, 8 changer transitions 5/63 dead transitions. [2023-08-30 18:12:05,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 63 transitions, 324 flow [2023-08-30 18:12:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:12:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:12:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 657 transitions. [2023-08-30 18:12:05,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2023-08-30 18:12:05,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 657 transitions. [2023-08-30 18:12:05,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 657 transitions. [2023-08-30 18:12:05,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:05,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 657 transitions. [2023-08-30 18:12:05,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,721 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 137 flow. Second operand 3 states and 657 transitions. [2023-08-30 18:12:05,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 63 transitions, 324 flow [2023-08-30 18:12:05,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 18:12:05,724 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 168 flow [2023-08-30 18:12:05,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-30 18:12:05,726 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2023-08-30 18:12:05,726 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 168 flow [2023-08-30 18:12:05,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:05,727 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:05,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 18:12:05,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:05,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1289784363, now seen corresponding path program 2 times [2023-08-30 18:12:05,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:05,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109958849] [2023-08-30 18:12:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:05,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:12:05,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:05,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109958849] [2023-08-30 18:12:05,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109958849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:05,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:05,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:12:05,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166663648] [2023-08-30 18:12:05,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:05,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:12:05,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:05,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:12:05,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:12:05,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 462 [2023-08-30 18:12:05,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:05,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:05,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 462 [2023-08-30 18:12:05,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:06,042 INFO L130 PetriNetUnfolder]: 101/292 cut-off events. [2023-08-30 18:12:06,043 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-08-30 18:12:06,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 292 events. 101/292 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1280 event pairs, 38 based on Foata normal form. 30/305 useless extension candidates. Maximal degree in co-relation 431. Up to 220 conditions per place. [2023-08-30 18:12:06,044 INFO L137 encePairwiseOnDemand]: 457/462 looper letters, 30 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-08-30 18:12:06,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 44 transitions, 235 flow [2023-08-30 18:12:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:12:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:12:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 835 transitions. [2023-08-30 18:12:06,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518398268398268 [2023-08-30 18:12:06,047 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 835 transitions. [2023-08-30 18:12:06,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 835 transitions. [2023-08-30 18:12:06,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:06,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 835 transitions. [2023-08-30 18:12:06,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:06,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:06,053 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:06,053 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 168 flow. Second operand 4 states and 835 transitions. [2023-08-30 18:12:06,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 44 transitions, 235 flow [2023-08-30 18:12:06,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 208 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 18:12:06,055 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 129 flow [2023-08-30 18:12:06,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-08-30 18:12:06,056 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2023-08-30 18:12:06,056 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 129 flow [2023-08-30 18:12:06,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:06,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:06,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:06,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 18:12:06,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:06,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1896164585, now seen corresponding path program 1 times [2023-08-30 18:12:06,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:06,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880088870] [2023-08-30 18:12:06,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:06,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:06,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:06,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880088870] [2023-08-30 18:12:06,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880088870] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:06,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014987456] [2023-08-30 18:12:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:06,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:06,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:06,423 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 18:12:06,425 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 18:12:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:06,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:12:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:06,642 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:12:06,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 124 [2023-08-30 18:12:06,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 106 treesize of output 106 [2023-08-30 18:12:06,695 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 18:12:06,718 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 18:12:06,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:12:06,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:12:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:06,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:06,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014987456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:06,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:06,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 18:12:06,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494862691] [2023-08-30 18:12:06,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:06,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:12:06,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:06,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:12:06,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 18:12:07,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 462 [2023-08-30 18:12:07,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 129 flow. Second operand has 12 states, 12 states have (on average 205.33333333333334) internal successors, (2464), 12 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:07,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:07,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 462 [2023-08-30 18:12:07,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:07,616 INFO L130 PetriNetUnfolder]: 97/322 cut-off events. [2023-08-30 18:12:07,617 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-30 18:12:07,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 322 events. 97/322 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1535 event pairs, 28 based on Foata normal form. 4/308 useless extension candidates. Maximal degree in co-relation 317. Up to 128 conditions per place. [2023-08-30 18:12:07,618 INFO L137 encePairwiseOnDemand]: 453/462 looper letters, 42 selfloop transitions, 11 changer transitions 18/80 dead transitions. [2023-08-30 18:12:07,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 403 flow [2023-08-30 18:12:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:12:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:12:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2293 transitions. [2023-08-30 18:12:07,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512003148366785 [2023-08-30 18:12:07,624 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2293 transitions. [2023-08-30 18:12:07,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2293 transitions. [2023-08-30 18:12:07,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:07,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2293 transitions. [2023-08-30 18:12:07,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 208.45454545454547) internal successors, (2293), 11 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:07,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 462.0) internal successors, (5544), 12 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:07,640 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 462.0) internal successors, (5544), 12 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:07,640 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 129 flow. Second operand 11 states and 2293 transitions. [2023-08-30 18:12:07,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 403 flow [2023-08-30 18:12:07,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 383 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 18:12:07,642 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 187 flow [2023-08-30 18:12:07,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=187, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-08-30 18:12:07,643 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2023-08-30 18:12:07,643 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 187 flow [2023-08-30 18:12:07,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.33333333333334) internal successors, (2464), 12 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:07,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:07,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:07,657 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 18:12:07,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:07,855 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:07,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash -403373324, now seen corresponding path program 1 times [2023-08-30 18:12:07,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:07,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555151325] [2023-08-30 18:12:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:07,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:08,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:08,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555151325] [2023-08-30 18:12:08,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555151325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:08,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34080957] [2023-08-30 18:12:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:08,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:08,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:08,189 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 18:12:08,191 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 18:12:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:08,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:12:08,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:08,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:12:08,415 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:12:08,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 118 [2023-08-30 18:12:08,448 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 18:12:08,481 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 18:12:08,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:12:08,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:12:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:08,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:08,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34080957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:08,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:08,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 18:12:08,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667686742] [2023-08-30 18:12:08,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:08,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:12:08,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:12:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 18:12:09,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 462 [2023-08-30 18:12:09,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 187 flow. Second operand has 12 states, 12 states have (on average 205.16666666666666) internal successors, (2462), 12 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:09,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:09,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 462 [2023-08-30 18:12:09,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:09,461 INFO L130 PetriNetUnfolder]: 138/446 cut-off events. [2023-08-30 18:12:09,461 INFO L131 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2023-08-30 18:12:09,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1198 conditions, 446 events. 138/446 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2443 event pairs, 44 based on Foata normal form. 6/428 useless extension candidates. Maximal degree in co-relation 1181. Up to 160 conditions per place. [2023-08-30 18:12:09,464 INFO L137 encePairwiseOnDemand]: 453/462 looper letters, 69 selfloop transitions, 16 changer transitions 10/104 dead transitions. [2023-08-30 18:12:09,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 104 transitions, 606 flow [2023-08-30 18:12:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:12:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:12:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2307 transitions. [2023-08-30 18:12:09,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539551357733176 [2023-08-30 18:12:09,471 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2307 transitions. [2023-08-30 18:12:09,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2307 transitions. [2023-08-30 18:12:09,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:09,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2307 transitions. [2023-08-30 18:12:09,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 209.72727272727272) internal successors, (2307), 11 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:09,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 462.0) internal successors, (5544), 12 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:09,498 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 462.0) internal successors, (5544), 12 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:09,499 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 187 flow. Second operand 11 states and 2307 transitions. [2023-08-30 18:12:09,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 104 transitions, 606 flow [2023-08-30 18:12:09,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 104 transitions, 580 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 18:12:09,502 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 274 flow [2023-08-30 18:12:09,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=274, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-30 18:12:09,503 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2023-08-30 18:12:09,503 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 274 flow [2023-08-30 18:12:09,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.16666666666666) internal successors, (2462), 12 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:09,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:09,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:09,515 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 18:12:09,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 18:12:09,710 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:09,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash -280300716, now seen corresponding path program 2 times [2023-08-30 18:12:09,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:09,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822003146] [2023-08-30 18:12:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:09,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:10,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:10,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822003146] [2023-08-30 18:12:10,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822003146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:10,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728428401] [2023-08-30 18:12:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:12:10,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:10,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:10,023 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 18:12:10,047 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 18:12:10,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:12:10,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:12:10,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:12:10,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:10,299 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:12:10,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 124 [2023-08-30 18:12:10,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 106 treesize of output 106 [2023-08-30 18:12:10,355 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 18:12:10,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:12:10,454 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 18:12:10,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:12:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:10,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:10,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728428401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:10,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:10,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 18:12:10,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528036300] [2023-08-30 18:12:10,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:10,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 18:12:10,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:10,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 18:12:10,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:12:11,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 462 [2023-08-30 18:12:11,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 274 flow. Second operand has 14 states, 14 states have (on average 204.71428571428572) internal successors, (2866), 14 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:11,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:11,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 462 [2023-08-30 18:12:11,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:11,461 INFO L130 PetriNetUnfolder]: 134/435 cut-off events. [2023-08-30 18:12:11,461 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2023-08-30 18:12:11,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 435 events. 134/435 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2398 event pairs, 60 based on Foata normal form. 3/411 useless extension candidates. Maximal degree in co-relation 1114. Up to 179 conditions per place. [2023-08-30 18:12:11,463 INFO L137 encePairwiseOnDemand]: 454/462 looper letters, 25 selfloop transitions, 2 changer transitions 48/80 dead transitions. [2023-08-30 18:12:11,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 513 flow [2023-08-30 18:12:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:12:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:12:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1461 transitions. [2023-08-30 18:12:11,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517625231910946 [2023-08-30 18:12:11,468 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1461 transitions. [2023-08-30 18:12:11,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1461 transitions. [2023-08-30 18:12:11,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:11,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1461 transitions. [2023-08-30 18:12:11,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.71428571428572) internal successors, (1461), 7 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:11,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 462.0) internal successors, (3696), 8 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:11,477 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 462.0) internal successors, (3696), 8 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:11,477 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 274 flow. Second operand 7 states and 1461 transitions. [2023-08-30 18:12:11,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 513 flow [2023-08-30 18:12:11,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 469 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-08-30 18:12:11,481 INFO L231 Difference]: Finished difference. Result has 74 places, 31 transitions, 123 flow [2023-08-30 18:12:11,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=74, PETRI_TRANSITIONS=31} [2023-08-30 18:12:11,481 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 7 predicate places. [2023-08-30 18:12:11,482 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 31 transitions, 123 flow [2023-08-30 18:12:11,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 204.71428571428572) internal successors, (2866), 14 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:11,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:11,483 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:11,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 18:12:11,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:11,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:11,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1871294106, now seen corresponding path program 2 times [2023-08-30 18:12:11,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:11,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174633863] [2023-08-30 18:12:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:12:12,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:12,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174633863] [2023-08-30 18:12:12,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174633863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:12,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:12,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:12:12,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313320349] [2023-08-30 18:12:12,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:12:12,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:12,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:12:12,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:12:12,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 462 [2023-08-30 18:12:12,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 31 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 204.85714285714286) internal successors, (1434), 7 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:12,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:12,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 462 [2023-08-30 18:12:12,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:12,402 INFO L130 PetriNetUnfolder]: 33/128 cut-off events. [2023-08-30 18:12:12,402 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 18:12:12,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 128 events. 33/128 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 399 event pairs, 26 based on Foata normal form. 1/128 useless extension candidates. Maximal degree in co-relation 331. Up to 75 conditions per place. [2023-08-30 18:12:12,402 INFO L137 encePairwiseOnDemand]: 455/462 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-30 18:12:12,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 34 transitions, 191 flow [2023-08-30 18:12:12,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:12:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:12:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1439 transitions. [2023-08-30 18:12:12,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44495980210265923 [2023-08-30 18:12:12,406 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1439 transitions. [2023-08-30 18:12:12,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1439 transitions. [2023-08-30 18:12:12,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:12,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1439 transitions. [2023-08-30 18:12:12,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:12,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 462.0) internal successors, (3696), 8 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:12,413 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 462.0) internal successors, (3696), 8 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:12,413 INFO L175 Difference]: Start difference. First operand has 74 places, 31 transitions, 123 flow. Second operand 7 states and 1439 transitions. [2023-08-30 18:12:12,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 34 transitions, 191 flow [2023-08-30 18:12:12,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 34 transitions, 175 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 18:12:12,414 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-30 18:12:12,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-30 18:12:12,415 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -20 predicate places. [2023-08-30 18:12:12,415 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-30 18:12:12,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.85714285714286) internal successors, (1434), 7 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:12,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 18:12:12,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 18:12:12,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 18:12:12,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 18:12:12,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 18:12:12,416 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1] [2023-08-30 18:12:12,417 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 18:12:12,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 260 transitions, 538 flow [2023-08-30 18:12:12,459 INFO L130 PetriNetUnfolder]: 72/424 cut-off events. [2023-08-30 18:12:12,459 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 18:12:12,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 72/424 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1596 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 273. Up to 12 conditions per place. [2023-08-30 18:12:12,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 260 transitions, 538 flow [2023-08-30 18:12:12,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 258 transitions, 534 flow [2023-08-30 18:12:12,464 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:12:12,464 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-30 18:12:12,465 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-30 18:12:12,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 258 transitions, 534 flow [2023-08-30 18:12:12,501 INFO L130 PetriNetUnfolder]: 71/422 cut-off events. [2023-08-30 18:12:12,502 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 18:12:12,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 422 events. 71/422 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1612 event pairs, 0 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2023-08-30 18:12:12,515 INFO L119 LiptonReduction]: Number of co-enabled transitions 25080 [2023-08-30 18:12:17,661 INFO L134 LiptonReduction]: Checked pairs total: 51640 [2023-08-30 18:12:17,662 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-30 18:12:17,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:12:17,664 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;@ca201ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:12:17,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 18:12:17,671 INFO L130 PetriNetUnfolder]: 37/109 cut-off events. [2023-08-30 18:12:17,671 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:12:17,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:17,671 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 18:12:17,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:12:17,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash -899889064, now seen corresponding path program 1 times [2023-08-30 18:12:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:17,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520001196] [2023-08-30 18:12:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:17,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:12:17,684 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:12:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:12:17,697 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:12:17,697 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:12:17,697 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 18:12:17,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 18:12:17,698 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 18:12:17,698 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 18:12:17,699 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:12:17,699 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 18:12:17,724 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 18:12:17,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 319 transitions, 668 flow [2023-08-30 18:12:17,792 INFO L130 PetriNetUnfolder]: 106/608 cut-off events. [2023-08-30 18:12:17,792 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 18:12:17,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 608 events. 106/608 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2559 event pairs, 1 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-08-30 18:12:17,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 319 transitions, 668 flow [2023-08-30 18:12:17,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 317 transitions, 664 flow [2023-08-30 18:12:17,805 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:12:17,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 317 transitions, 664 flow [2023-08-30 18:12:17,805 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 317 transitions, 664 flow [2023-08-30 18:12:17,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 317 transitions, 664 flow [2023-08-30 18:12:17,869 INFO L130 PetriNetUnfolder]: 105/606 cut-off events. [2023-08-30 18:12:17,870 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 18:12:17,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 606 events. 105/606 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2552 event pairs, 1 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 430. Up to 16 conditions per place. [2023-08-30 18:12:17,896 INFO L119 LiptonReduction]: Number of co-enabled transitions 47880 [2023-08-30 18:12:23,031 INFO L134 LiptonReduction]: Checked pairs total: 102829 [2023-08-30 18:12:23,031 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-08-30 18:12:23,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:12:23,034 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;@ca201ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:12:23,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 18:12:23,037 INFO L130 PetriNetUnfolder]: 7/26 cut-off events. [2023-08-30 18:12:23,037 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:12:23,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:23,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 18:12:23,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:12:23,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2124670951, now seen corresponding path program 1 times [2023-08-30 18:12:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:23,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868411814] [2023-08-30 18:12:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:23,098 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 18:12:23,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:23,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868411814] [2023-08-30 18:12:23,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868411814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:23,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:23,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:12:23,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732545600] [2023-08-30 18:12:23,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:23,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:12:23,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:23,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:12:23,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:12:23,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 563 [2023-08-30 18:12:23,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 128 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:23,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:23,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 563 [2023-08-30 18:12:23,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:37,990 INFO L130 PetriNetUnfolder]: 187412/264993 cut-off events. [2023-08-30 18:12:37,991 INFO L131 PetriNetUnfolder]: For 3111/3111 co-relation queries the response was YES. [2023-08-30 18:12:38,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511940 conditions, 264993 events. 187412/264993 cut-off events. For 3111/3111 co-relation queries the response was YES. Maximal size of possible extension queue 7504. Compared 2103639 event pairs, 115799 based on Foata normal form. 66267/288155 useless extension candidates. Maximal degree in co-relation 25663. Up to 244876 conditions per place. [2023-08-30 18:12:39,675 INFO L137 encePairwiseOnDemand]: 519/563 looper letters, 82 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-30 18:12:39,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 104 transitions, 406 flow [2023-08-30 18:12:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:12:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:12:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-08-30 18:12:39,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405565423327413 [2023-08-30 18:12:39,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-08-30 18:12:39,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-08-30 18:12:39,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:39,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-08-30 18:12:39,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:39,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:39,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:39,685 INFO L175 Difference]: Start difference. First operand has 87 places, 128 transitions, 286 flow. Second operand 3 states and 913 transitions. [2023-08-30 18:12:39,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 104 transitions, 406 flow [2023-08-30 18:12:39,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 104 transitions, 406 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:12:39,690 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 216 flow [2023-08-30 18:12:39,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-08-30 18:12:39,691 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-30 18:12:39,691 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 216 flow [2023-08-30 18:12:39,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:39,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:39,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:39,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 18:12:39,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:12:39,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:39,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1929137805, now seen corresponding path program 1 times [2023-08-30 18:12:39,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:39,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140682429] [2023-08-30 18:12:39,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:39,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:39,781 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 18:12:39,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140682429] [2023-08-30 18:12:39,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140682429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:39,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:39,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:12:39,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631512446] [2023-08-30 18:12:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:39,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:12:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:12:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:12:39,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 563 [2023-08-30 18:12:39,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 250.75) internal successors, (1003), 4 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:39,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:39,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 563 [2023-08-30 18:12:39,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:59,974 INFO L130 PetriNetUnfolder]: 260867/369664 cut-off events. [2023-08-30 18:12:59,974 INFO L131 PetriNetUnfolder]: For 14388/14388 co-relation queries the response was YES. [2023-08-30 18:13:00,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734054 conditions, 369664 events. 260867/369664 cut-off events. For 14388/14388 co-relation queries the response was YES. Maximal size of possible extension queue 11564. Compared 3049194 event pairs, 62003 based on Foata normal form. 0/324793 useless extension candidates. Maximal degree in co-relation 733940. Up to 225337 conditions per place. [2023-08-30 18:13:01,960 INFO L137 encePairwiseOnDemand]: 546/563 looper letters, 157 selfloop transitions, 18 changer transitions 0/195 dead transitions. [2023-08-30 18:13:01,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 195 transitions, 828 flow [2023-08-30 18:13:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:13:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:13:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1175 transitions. [2023-08-30 18:13:01,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217584369449378 [2023-08-30 18:13:01,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1175 transitions. [2023-08-30 18:13:01,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1175 transitions. [2023-08-30 18:13:01,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:01,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1175 transitions. [2023-08-30 18:13:01,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.75) internal successors, (1175), 4 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:01,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:01,968 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:01,968 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 216 flow. Second operand 4 states and 1175 transitions. [2023-08-30 18:13:01,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 195 transitions, 828 flow [2023-08-30 18:13:01,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 195 transitions, 825 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:13:01,977 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 358 flow [2023-08-30 18:13:01,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2023-08-30 18:13:01,978 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 8 predicate places. [2023-08-30 18:13:01,978 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 358 flow [2023-08-30 18:13:01,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 250.75) internal successors, (1003), 4 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:01,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:01,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:01,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 18:13:01,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:01,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash -804210261, now seen corresponding path program 1 times [2023-08-30 18:13:01,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:01,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645478016] [2023-08-30 18:13:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:01,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:13:02,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:02,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645478016] [2023-08-30 18:13:02,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645478016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:02,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926787786] [2023-08-30 18:13:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:02,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:02,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:02,027 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 18:13:02,030 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 18:13:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:13:02,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:13:02,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:13:02,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926787786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:02,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:02,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 18:13:02,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878615039] [2023-08-30 18:13:02,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:02,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:13:02,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:02,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:13:02,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:13:02,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 563 [2023-08-30 18:13:02,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 358 flow. Second operand has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:02,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:02,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 563 [2023-08-30 18:13:02,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:05,257 INFO L130 PetriNetUnfolder]: 34538/53421 cut-off events. [2023-08-30 18:13:05,257 INFO L131 PetriNetUnfolder]: For 30988/30988 co-relation queries the response was YES. [2023-08-30 18:13:05,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137698 conditions, 53421 events. 34538/53421 cut-off events. For 30988/30988 co-relation queries the response was YES. Maximal size of possible extension queue 2175. Compared 422718 event pairs, 1119 based on Foata normal form. 4795/55765 useless extension candidates. Maximal degree in co-relation 39534. Up to 33949 conditions per place. [2023-08-30 18:13:05,496 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 163 selfloop transitions, 4 changer transitions 2/183 dead transitions. [2023-08-30 18:13:05,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 183 transitions, 961 flow [2023-08-30 18:13:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:13:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:13:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1688 transitions. [2023-08-30 18:13:05,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4997039668442866 [2023-08-30 18:13:05,500 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1688 transitions. [2023-08-30 18:13:05,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1688 transitions. [2023-08-30 18:13:05,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:05,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1688 transitions. [2023-08-30 18:13:05,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 281.3333333333333) internal successors, (1688), 6 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:05,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:05,507 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:05,507 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 358 flow. Second operand 6 states and 1688 transitions. [2023-08-30 18:13:05,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 183 transitions, 961 flow [2023-08-30 18:13:05,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 183 transitions, 955 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 18:13:05,543 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 267 flow [2023-08-30 18:13:05,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2023-08-30 18:13:05,543 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-08-30 18:13:05,543 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 267 flow [2023-08-30 18:13:05,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:05,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:05,544 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:05,550 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 18:13:05,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:05,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:05,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:05,751 INFO L85 PathProgramCache]: Analyzing trace with hash -671050181, now seen corresponding path program 1 times [2023-08-30 18:13:05,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:05,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550964940] [2023-08-30 18:13:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:13:05,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:05,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550964940] [2023-08-30 18:13:05,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550964940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:05,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659295766] [2023-08-30 18:13:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:05,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:05,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:05,861 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 18:13:05,865 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 18:13:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:05,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 18:13:05,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:06,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:13:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:13:06,301 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 18:13:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:13:06,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:13:06,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659295766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:13:06,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:13:06,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-30 18:13:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210566388] [2023-08-30 18:13:06,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:13:06,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:13:06,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:06,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:13:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:13:06,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 563 [2023-08-30 18:13:06,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:06,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:06,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 563 [2023-08-30 18:13:06,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:08,238 INFO L130 PetriNetUnfolder]: 17110/27138 cut-off events. [2023-08-30 18:13:08,238 INFO L131 PetriNetUnfolder]: For 15050/15050 co-relation queries the response was YES. [2023-08-30 18:13:08,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68050 conditions, 27138 events. 17110/27138 cut-off events. For 15050/15050 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 201199 event pairs, 4786 based on Foata normal form. 4278/29136 useless extension candidates. Maximal degree in co-relation 15772. Up to 17984 conditions per place. [2023-08-30 18:13:08,365 INFO L137 encePairwiseOnDemand]: 544/563 looper letters, 65 selfloop transitions, 19 changer transitions 2/95 dead transitions. [2023-08-30 18:13:08,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 505 flow [2023-08-30 18:13:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:13:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:13:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1002 transitions. [2023-08-30 18:13:08,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44493783303730017 [2023-08-30 18:13:08,368 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1002 transitions. [2023-08-30 18:13:08,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1002 transitions. [2023-08-30 18:13:08,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:08,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1002 transitions. [2023-08-30 18:13:08,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.5) internal successors, (1002), 4 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:08,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:08,373 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:08,373 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 267 flow. Second operand 4 states and 1002 transitions. [2023-08-30 18:13:08,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 505 flow [2023-08-30 18:13:08,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 95 transitions, 490 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 18:13:08,382 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 284 flow [2023-08-30 18:13:08,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2023-08-30 18:13:08,382 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-08-30 18:13:08,382 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 284 flow [2023-08-30 18:13:08,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:08,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:08,383 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:08,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 18:13:08,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:08,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:08,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:08,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1522724399, now seen corresponding path program 1 times [2023-08-30 18:13:08,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:08,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752159829] [2023-08-30 18:13:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:08,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:08,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:08,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752159829] [2023-08-30 18:13:08,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752159829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:08,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001641628] [2023-08-30 18:13:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:08,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:08,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:08,705 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 18:13:08,708 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 18:13:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:08,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 18:13:08,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:08,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 18:13:08,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:13:08,861 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 16 treesize of output 18 [2023-08-30 18:13:08,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:13:08,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 18:13:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:08,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:08,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:13:08,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-30 18:13:08,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-08-30 18:13:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001641628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:08,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:08,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 18:13:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439301692] [2023-08-30 18:13:08,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:08,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 18:13:08,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 18:13:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-08-30 18:13:09,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 563 [2023-08-30 18:13:09,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 284 flow. Second operand has 10 states, 10 states have (on average 236.5) internal successors, (2365), 10 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:09,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:09,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 563 [2023-08-30 18:13:09,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:09,672 INFO L130 PetriNetUnfolder]: 914/2260 cut-off events. [2023-08-30 18:13:09,672 INFO L131 PetriNetUnfolder]: For 1331/1331 co-relation queries the response was YES. [2023-08-30 18:13:09,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6190 conditions, 2260 events. 914/2260 cut-off events. For 1331/1331 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 16400 event pairs, 79 based on Foata normal form. 709/2876 useless extension candidates. Maximal degree in co-relation 3929. Up to 1808 conditions per place. [2023-08-30 18:13:09,678 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 60 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-08-30 18:13:09,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 436 flow [2023-08-30 18:13:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:13:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:13:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 990 transitions. [2023-08-30 18:13:09,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43960923623445824 [2023-08-30 18:13:09,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 990 transitions. [2023-08-30 18:13:09,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 990 transitions. [2023-08-30 18:13:09,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:09,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 990 transitions. [2023-08-30 18:13:09,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 247.5) internal successors, (990), 4 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:09,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:09,683 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:09,683 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 284 flow. Second operand 4 states and 990 transitions. [2023-08-30 18:13:09,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 436 flow [2023-08-30 18:13:09,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 78 transitions, 398 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 18:13:09,687 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 242 flow [2023-08-30 18:13:09,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2023-08-30 18:13:09,688 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-08-30 18:13:09,688 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 242 flow [2023-08-30 18:13:09,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 236.5) internal successors, (2365), 10 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:09,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:09,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:09,699 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 18:13:09,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:09,893 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:09,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:09,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2009762394, now seen corresponding path program 1 times [2023-08-30 18:13:09,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:09,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631454331] [2023-08-30 18:13:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:09,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:10,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:10,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631454331] [2023-08-30 18:13:10,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631454331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:10,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450038338] [2023-08-30 18:13:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:10,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:10,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:10,109 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 18:13:10,134 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 18:13:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:10,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:13:10,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:10,361 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:10,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:10,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 126 [2023-08-30 18:13:10,393 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:10,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 128 [2023-08-30 18:13:10,437 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 18:13:10,464 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 18:13:10,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:10,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:10,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:10,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450038338] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:10,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:10,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 18:13:10,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69260188] [2023-08-30 18:13:10,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:10,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:13:10,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:13:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 18:13:11,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 563 [2023-08-30 18:13:11,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 242 flow. Second operand has 12 states, 12 states have (on average 248.16666666666666) internal successors, (2978), 12 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:11,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:11,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 563 [2023-08-30 18:13:11,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:11,700 INFO L130 PetriNetUnfolder]: 1127/3005 cut-off events. [2023-08-30 18:13:11,701 INFO L131 PetriNetUnfolder]: For 1812/1812 co-relation queries the response was YES. [2023-08-30 18:13:11,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7755 conditions, 3005 events. 1127/3005 cut-off events. For 1812/1812 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 24201 event pairs, 313 based on Foata normal form. 28/2903 useless extension candidates. Maximal degree in co-relation 3999. Up to 1058 conditions per place. [2023-08-30 18:13:11,710 INFO L137 encePairwiseOnDemand]: 549/563 looper letters, 149 selfloop transitions, 24 changer transitions 14/201 dead transitions. [2023-08-30 18:13:11,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 201 transitions, 1116 flow [2023-08-30 18:13:11,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:13:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:13:11,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3844 transitions. [2023-08-30 18:13:11,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551805802249852 [2023-08-30 18:13:11,723 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3844 transitions. [2023-08-30 18:13:11,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3844 transitions. [2023-08-30 18:13:11,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:11,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3844 transitions. [2023-08-30 18:13:11,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 256.26666666666665) internal successors, (3844), 15 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:11,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 563.0) internal successors, (9008), 16 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:11,736 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 563.0) internal successors, (9008), 16 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:11,737 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 242 flow. Second operand 15 states and 3844 transitions. [2023-08-30 18:13:11,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 201 transitions, 1116 flow [2023-08-30 18:13:11,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 201 transitions, 1092 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 18:13:11,742 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 437 flow [2023-08-30 18:13:11,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=437, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2023-08-30 18:13:11,743 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 13 predicate places. [2023-08-30 18:13:11,743 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 437 flow [2023-08-30 18:13:11,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 248.16666666666666) internal successors, (2978), 12 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:11,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:11,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:11,752 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 18:13:11,948 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,SelfDestructingSolverStorable20 [2023-08-30 18:13:11,949 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:11,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash 2036307991, now seen corresponding path program 1 times [2023-08-30 18:13:11,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:11,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677563351] [2023-08-30 18:13:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:11,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:12,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:12,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677563351] [2023-08-30 18:13:12,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677563351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:12,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817326707] [2023-08-30 18:13:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:12,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:12,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:12,215 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 18:13:12,217 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 18:13:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:13:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:12,468 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:12,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:12,488 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:12,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:13:12,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 116 treesize of output 116 [2023-08-30 18:13:12,538 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 18:13:12,559 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 18:13:12,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:12,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:12,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:12,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817326707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:12,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:12,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 18:13:12,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443181971] [2023-08-30 18:13:12,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:12,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:13:12,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:12,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:13:12,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 18:13:13,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 563 [2023-08-30 18:13:13,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 437 flow. Second operand has 12 states, 12 states have (on average 248.16666666666666) internal successors, (2978), 12 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:13,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:13,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 563 [2023-08-30 18:13:13,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:13,760 INFO L130 PetriNetUnfolder]: 1363/3675 cut-off events. [2023-08-30 18:13:13,760 INFO L131 PetriNetUnfolder]: For 10908/10908 co-relation queries the response was YES. [2023-08-30 18:13:13,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12195 conditions, 3675 events. 1363/3675 cut-off events. For 10908/10908 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 31117 event pairs, 440 based on Foata normal form. 26/3541 useless extension candidates. Maximal degree in co-relation 11841. Up to 1543 conditions per place. [2023-08-30 18:13:13,774 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 147 selfloop transitions, 24 changer transitions 14/199 dead transitions. [2023-08-30 18:13:13,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 199 transitions, 1298 flow [2023-08-30 18:13:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:13:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:13:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3341 transitions. [2023-08-30 18:13:13,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564831261101243 [2023-08-30 18:13:13,777 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3341 transitions. [2023-08-30 18:13:13,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3341 transitions. [2023-08-30 18:13:13,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:13,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3341 transitions. [2023-08-30 18:13:13,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 257.0) internal successors, (3341), 13 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:13,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 563.0) internal successors, (7882), 14 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:13,786 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 563.0) internal successors, (7882), 14 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:13,786 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 437 flow. Second operand 13 states and 3341 transitions. [2023-08-30 18:13:13,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 199 transitions, 1298 flow [2023-08-30 18:13:13,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 199 transitions, 1276 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 18:13:13,795 INFO L231 Difference]: Finished difference. Result has 113 places, 104 transitions, 665 flow [2023-08-30 18:13:13,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=665, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2023-08-30 18:13:13,795 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 26 predicate places. [2023-08-30 18:13:13,795 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 665 flow [2023-08-30 18:13:13,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 248.16666666666666) internal successors, (2978), 12 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:13,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:13,796 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:13,800 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 18:13:13,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 18:13:13,996 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:13,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1798766152, now seen corresponding path program 2 times [2023-08-30 18:13:13,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:13,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369226900] [2023-08-30 18:13:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:13,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:14,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369226900] [2023-08-30 18:13:14,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369226900] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:14,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661128846] [2023-08-30 18:13:14,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:13:14,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:14,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:14,215 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 18:13:14,240 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 18:13:14,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:13:14,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:13:14,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:13:14,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:14,457 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:14,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:14,477 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:14,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:13:14,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 116 treesize of output 116 [2023-08-30 18:13:14,521 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 18:13:14,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:14,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:14,638 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 18:13:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:13:14,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:14,669 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_864) |c_~#A~0.base|) |c_~#A~0.offset|) 0)) is different from false [2023-08-30 18:13:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 18:13:14,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661128846] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:14,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:14,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 11 [2023-08-30 18:13:14,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006605445] [2023-08-30 18:13:14,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:14,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:13:14,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:13:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=98, Unknown=1, NotChecked=20, Total=156 [2023-08-30 18:13:14,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 563 [2023-08-30 18:13:14,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 104 transitions, 665 flow. Second operand has 13 states, 13 states have (on average 204.23076923076923) internal successors, (2655), 13 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:14,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:14,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 563 [2023-08-30 18:13:14,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:15,368 INFO L130 PetriNetUnfolder]: 1442/3878 cut-off events. [2023-08-30 18:13:15,369 INFO L131 PetriNetUnfolder]: For 24167/24167 co-relation queries the response was YES. [2023-08-30 18:13:15,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14947 conditions, 3878 events. 1442/3878 cut-off events. For 24167/24167 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 33296 event pairs, 641 based on Foata normal form. 13/3718 useless extension candidates. Maximal degree in co-relation 14750. Up to 1517 conditions per place. [2023-08-30 18:13:15,384 INFO L137 encePairwiseOnDemand]: 549/563 looper letters, 132 selfloop transitions, 25 changer transitions 15/185 dead transitions. [2023-08-30 18:13:15,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 185 transitions, 1429 flow [2023-08-30 18:13:15,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:13:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:13:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1734 transitions. [2023-08-30 18:13:15,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3849911190053286 [2023-08-30 18:13:15,386 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1734 transitions. [2023-08-30 18:13:15,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1734 transitions. [2023-08-30 18:13:15,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:15,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1734 transitions. [2023-08-30 18:13:15,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 216.75) internal successors, (1734), 8 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:15,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 563.0) internal successors, (5067), 9 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:15,390 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 563.0) internal successors, (5067), 9 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:15,390 INFO L175 Difference]: Start difference. First operand has 113 places, 104 transitions, 665 flow. Second operand 8 states and 1734 transitions. [2023-08-30 18:13:15,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 185 transitions, 1429 flow [2023-08-30 18:13:15,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 185 transitions, 1383 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-08-30 18:13:15,407 INFO L231 Difference]: Finished difference. Result has 117 places, 105 transitions, 691 flow [2023-08-30 18:13:15,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=691, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2023-08-30 18:13:15,408 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 30 predicate places. [2023-08-30 18:13:15,408 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 691 flow [2023-08-30 18:13:15,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 204.23076923076923) internal successors, (2655), 13 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:15,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:15,408 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:15,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 18:13:15,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 18:13:15,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:15,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1266947748, now seen corresponding path program 2 times [2023-08-30 18:13:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:15,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630266127] [2023-08-30 18:13:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:13:15,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:15,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630266127] [2023-08-30 18:13:15,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630266127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:15,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530326292] [2023-08-30 18:13:15,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:13:15,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:15,869 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 18:13:15,874 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 18:13:15,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:13:15,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:13:15,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 18:13:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:16,119 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:16,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:16,137 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:16,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:13:16,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 116 treesize of output 116 [2023-08-30 18:13:16,184 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 18:13:16,203 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 18:13:16,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:16,292 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 18:13:16,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:13:16,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:16,389 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_941 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_941) |c_~#A~0.base|) |c_~#A~0.offset|) 1)) (forall ((v_ArrVal_941 (Array Int Int))) (<= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_941) |c_~#A~0.base|) |c_~#A~0.offset|)))) is different from false [2023-08-30 18:13:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2023-08-30 18:13:16,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530326292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:16,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:16,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 18:13:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325487261] [2023-08-30 18:13:16,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:16,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 18:13:16,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 18:13:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=140, Unknown=1, NotChecked=24, Total=210 [2023-08-30 18:13:16,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 563 [2023-08-30 18:13:16,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 691 flow. Second operand has 15 states, 15 states have (on average 203.73333333333332) internal successors, (3056), 15 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:16,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:16,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 563 [2023-08-30 18:13:16,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:17,008 INFO L130 PetriNetUnfolder]: 1357/3729 cut-off events. [2023-08-30 18:13:17,008 INFO L131 PetriNetUnfolder]: For 22959/22959 co-relation queries the response was YES. [2023-08-30 18:13:17,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14417 conditions, 3729 events. 1357/3729 cut-off events. For 22959/22959 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 31736 event pairs, 638 based on Foata normal form. 11/3575 useless extension candidates. Maximal degree in co-relation 10540. Up to 1507 conditions per place. [2023-08-30 18:13:17,023 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 117 selfloop transitions, 19 changer transitions 20/169 dead transitions. [2023-08-30 18:13:17,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 169 transitions, 1335 flow [2023-08-30 18:13:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:13:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:13:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1520 transitions. [2023-08-30 18:13:17,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38568891144379597 [2023-08-30 18:13:17,025 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1520 transitions. [2023-08-30 18:13:17,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1520 transitions. [2023-08-30 18:13:17,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:17,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1520 transitions. [2023-08-30 18:13:17,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 217.14285714285714) internal successors, (1520), 7 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:17,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 563.0) internal successors, (4504), 8 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:17,030 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 563.0) internal successors, (4504), 8 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:17,030 INFO L175 Difference]: Start difference. First operand has 117 places, 105 transitions, 691 flow. Second operand 7 states and 1520 transitions. [2023-08-30 18:13:17,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 169 transitions, 1335 flow [2023-08-30 18:13:17,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 169 transitions, 1291 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 18:13:17,045 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 680 flow [2023-08-30 18:13:17,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=680, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2023-08-30 18:13:17,045 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 35 predicate places. [2023-08-30 18:13:17,045 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 680 flow [2023-08-30 18:13:17,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 203.73333333333332) internal successors, (3056), 15 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:17,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:17,046 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:17,052 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 18:13:17,250 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,SelfDestructingSolverStorable23 [2023-08-30 18:13:17,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:17,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:17,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1423626499, now seen corresponding path program 1 times [2023-08-30 18:13:17,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:17,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201566678] [2023-08-30 18:13:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:17,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:17,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:17,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201566678] [2023-08-30 18:13:17,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201566678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:17,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770221857] [2023-08-30 18:13:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:17,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:17,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:17,477 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 18:13:17,505 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 18:13:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:17,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 18:13:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:17,722 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:17,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:17,742 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:17,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:13:17,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 116 treesize of output 116 [2023-08-30 18:13:17,781 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 18:13:17,798 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 18:13:17,818 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 18:13:17,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:17,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:17,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:17,957 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1018 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1018) |c_~#A~0.base|) |c_~#A~0.offset|) 0)) is different from false [2023-08-30 18:13:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-30 18:13:17,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770221857] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:17,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:17,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 18:13:17,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055988776] [2023-08-30 18:13:17,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:17,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:13:17,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:17,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:13:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=100, Unknown=1, NotChecked=20, Total=156 [2023-08-30 18:13:18,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 563 [2023-08-30 18:13:18,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 680 flow. Second operand has 13 states, 13 states have (on average 204.69230769230768) internal successors, (2661), 13 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:18,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:18,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 563 [2023-08-30 18:13:18,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:18,515 INFO L130 PetriNetUnfolder]: 1131/3179 cut-off events. [2023-08-30 18:13:18,516 INFO L131 PetriNetUnfolder]: For 20235/20235 co-relation queries the response was YES. [2023-08-30 18:13:18,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12414 conditions, 3179 events. 1131/3179 cut-off events. For 20235/20235 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 26016 event pairs, 408 based on Foata normal form. 16/3050 useless extension candidates. Maximal degree in co-relation 9051. Up to 1767 conditions per place. [2023-08-30 18:13:18,529 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 137 selfloop transitions, 19 changer transitions 18/187 dead transitions. [2023-08-30 18:13:18,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 187 transitions, 1483 flow [2023-08-30 18:13:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:13:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:13:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2348 transitions. [2023-08-30 18:13:18,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791377361537219 [2023-08-30 18:13:18,532 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2348 transitions. [2023-08-30 18:13:18,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2348 transitions. [2023-08-30 18:13:18,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:18,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2348 transitions. [2023-08-30 18:13:18,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 213.45454545454547) internal successors, (2348), 11 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:18,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:18,539 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:18,539 INFO L175 Difference]: Start difference. First operand has 122 places, 102 transitions, 680 flow. Second operand 11 states and 2348 transitions. [2023-08-30 18:13:18,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 187 transitions, 1483 flow [2023-08-30 18:13:18,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 187 transitions, 1447 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 18:13:18,557 INFO L231 Difference]: Finished difference. Result has 133 places, 118 transitions, 928 flow [2023-08-30 18:13:18,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=928, PETRI_PLACES=133, PETRI_TRANSITIONS=118} [2023-08-30 18:13:18,557 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 46 predicate places. [2023-08-30 18:13:18,557 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 118 transitions, 928 flow [2023-08-30 18:13:18,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 204.69230769230768) internal successors, (2661), 13 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:18,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:18,558 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:18,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 18:13:18,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:18,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:18,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash -83043722, now seen corresponding path program 2 times [2023-08-30 18:13:18,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:18,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920981906] [2023-08-30 18:13:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 18:13:19,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:19,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920981906] [2023-08-30 18:13:19,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920981906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:13:19,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:13:19,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:13:19,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127619422] [2023-08-30 18:13:19,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:13:19,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:13:19,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:13:19,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:13:19,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 563 [2023-08-30 18:13:19,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 118 transitions, 928 flow. Second operand has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:19,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:19,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 563 [2023-08-30 18:13:19,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:19,965 INFO L130 PetriNetUnfolder]: 1114/3199 cut-off events. [2023-08-30 18:13:19,965 INFO L131 PetriNetUnfolder]: For 23037/23041 co-relation queries the response was YES. [2023-08-30 18:13:19,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12939 conditions, 3199 events. 1114/3199 cut-off events. For 23037/23041 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 26394 event pairs, 499 based on Foata normal form. 4/3054 useless extension candidates. Maximal degree in co-relation 12621. Up to 1680 conditions per place. [2023-08-30 18:13:19,985 INFO L137 encePairwiseOnDemand]: 553/563 looper letters, 104 selfloop transitions, 18 changer transitions 15/150 dead transitions. [2023-08-30 18:13:19,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 150 transitions, 1326 flow [2023-08-30 18:13:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:13:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:13:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1802 transitions. [2023-08-30 18:13:19,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457244354224816 [2023-08-30 18:13:19,988 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1802 transitions. [2023-08-30 18:13:19,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1802 transitions. [2023-08-30 18:13:19,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:19,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1802 transitions. [2023-08-30 18:13:19,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 257.42857142857144) internal successors, (1802), 7 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:19,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 563.0) internal successors, (4504), 8 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:19,993 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 563.0) internal successors, (4504), 8 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:19,994 INFO L175 Difference]: Start difference. First operand has 133 places, 118 transitions, 928 flow. Second operand 7 states and 1802 transitions. [2023-08-30 18:13:19,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 150 transitions, 1326 flow [2023-08-30 18:13:20,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 150 transitions, 1200 flow, removed 63 selfloop flow, removed 0 redundant places. [2023-08-30 18:13:20,019 INFO L231 Difference]: Finished difference. Result has 142 places, 113 transitions, 816 flow [2023-08-30 18:13:20,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=816, PETRI_PLACES=142, PETRI_TRANSITIONS=113} [2023-08-30 18:13:20,020 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 55 predicate places. [2023-08-30 18:13:20,020 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 113 transitions, 816 flow [2023-08-30 18:13:20,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:20,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:20,020 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:20,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 18:13:20,020 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:20,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 981358836, now seen corresponding path program 1 times [2023-08-30 18:13:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:20,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230286776] [2023-08-30 18:13:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:20,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:20,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:20,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230286776] [2023-08-30 18:13:20,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230286776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:20,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938034750] [2023-08-30 18:13:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:20,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:20,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:20,437 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 18:13:20,468 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 18:13:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:20,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:13:20,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:20,726 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:20,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:20,747 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:20,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:13:20,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 116 treesize of output 116 [2023-08-30 18:13:20,794 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 18:13:20,815 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 18:13:20,854 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 18:13:20,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:20,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:20,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:20,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:21,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:21,070 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1165 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1165) |c_~#A~0.base|) |c_~#A~0.offset|) 0)) is different from false [2023-08-30 18:13:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-30 18:13:21,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938034750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:21,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:21,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 18:13:21,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111573218] [2023-08-30 18:13:21,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:21,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 18:13:21,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:21,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 18:13:21,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2023-08-30 18:13:21,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 563 [2023-08-30 18:13:21,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 113 transitions, 816 flow. Second operand has 17 states, 17 states have (on average 200.94117647058823) internal successors, (3416), 17 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:21,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:21,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 563 [2023-08-30 18:13:21,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:21,687 INFO L130 PetriNetUnfolder]: 742/2094 cut-off events. [2023-08-30 18:13:21,687 INFO L131 PetriNetUnfolder]: For 12609/12611 co-relation queries the response was YES. [2023-08-30 18:13:21,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8184 conditions, 2094 events. 742/2094 cut-off events. For 12609/12611 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 15296 event pairs, 162 based on Foata normal form. 6/2004 useless extension candidates. Maximal degree in co-relation 7999. Up to 812 conditions per place. [2023-08-30 18:13:21,698 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 184 selfloop transitions, 62 changer transitions 13/272 dead transitions. [2023-08-30 18:13:21,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 272 transitions, 2323 flow [2023-08-30 18:13:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 18:13:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 18:13:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4727 transitions. [2023-08-30 18:13:21,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3650474940149819 [2023-08-30 18:13:21,703 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4727 transitions. [2023-08-30 18:13:21,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4727 transitions. [2023-08-30 18:13:21,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:21,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4727 transitions. [2023-08-30 18:13:21,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 205.52173913043478) internal successors, (4727), 23 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:21,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 563.0) internal successors, (13512), 24 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:21,719 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 563.0) internal successors, (13512), 24 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:21,719 INFO L175 Difference]: Start difference. First operand has 142 places, 113 transitions, 816 flow. Second operand 23 states and 4727 transitions. [2023-08-30 18:13:21,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 272 transitions, 2323 flow [2023-08-30 18:13:21,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 272 transitions, 2220 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-08-30 18:13:21,741 INFO L231 Difference]: Finished difference. Result has 156 places, 147 transitions, 1336 flow [2023-08-30 18:13:21,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1336, PETRI_PLACES=156, PETRI_TRANSITIONS=147} [2023-08-30 18:13:21,742 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 69 predicate places. [2023-08-30 18:13:21,742 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 147 transitions, 1336 flow [2023-08-30 18:13:21,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 200.94117647058823) internal successors, (3416), 17 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:21,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:21,743 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:21,748 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 18:13:21,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 18:13:21,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:21,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1520017161, now seen corresponding path program 1 times [2023-08-30 18:13:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:21,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239878533] [2023-08-30 18:13:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:21,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:22,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:22,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239878533] [2023-08-30 18:13:22,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239878533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:22,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224020270] [2023-08-30 18:13:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:22,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:22,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:22,337 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 18:13:22,354 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 18:13:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:22,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:13:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:22,633 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:22,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:22,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 126 [2023-08-30 18:13:22,663 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:22,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 128 [2023-08-30 18:13:22,715 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 18:13:22,743 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 18:13:22,798 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 18:13:22,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:22,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:22,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:22,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:22,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:23,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224020270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:23,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:23,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-30 18:13:23,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976463306] [2023-08-30 18:13:23,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:23,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 18:13:23,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:23,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 18:13:23,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-08-30 18:13:24,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 563 [2023-08-30 18:13:24,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 147 transitions, 1336 flow. Second operand has 16 states, 16 states have (on average 244.875) internal successors, (3918), 16 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:24,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:24,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 563 [2023-08-30 18:13:24,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:24,556 INFO L130 PetriNetUnfolder]: 777/2248 cut-off events. [2023-08-30 18:13:24,556 INFO L131 PetriNetUnfolder]: For 15984/15990 co-relation queries the response was YES. [2023-08-30 18:13:24,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9275 conditions, 2248 events. 777/2248 cut-off events. For 15984/15990 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 16907 event pairs, 213 based on Foata normal form. 10/2157 useless extension candidates. Maximal degree in co-relation 8656. Up to 1204 conditions per place. [2023-08-30 18:13:24,567 INFO L137 encePairwiseOnDemand]: 549/563 looper letters, 186 selfloop transitions, 55 changer transitions 29/283 dead transitions. [2023-08-30 18:13:24,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 283 transitions, 2745 flow [2023-08-30 18:13:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 18:13:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 18:13:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6206 transitions. [2023-08-30 18:13:24,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409236234458259 [2023-08-30 18:13:24,574 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6206 transitions. [2023-08-30 18:13:24,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6206 transitions. [2023-08-30 18:13:24,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:24,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6206 transitions. [2023-08-30 18:13:24,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 248.24) internal successors, (6206), 25 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:24,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 563.0) internal successors, (14638), 26 states have internal predecessors, (14638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:24,592 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 563.0) internal successors, (14638), 26 states have internal predecessors, (14638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:24,592 INFO L175 Difference]: Start difference. First operand has 156 places, 147 transitions, 1336 flow. Second operand 25 states and 6206 transitions. [2023-08-30 18:13:24,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 283 transitions, 2745 flow [2023-08-30 18:13:24,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 283 transitions, 2299 flow, removed 213 selfloop flow, removed 6 redundant places. [2023-08-30 18:13:24,642 INFO L231 Difference]: Finished difference. Result has 183 places, 167 transitions, 1411 flow [2023-08-30 18:13:24,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1411, PETRI_PLACES=183, PETRI_TRANSITIONS=167} [2023-08-30 18:13:24,642 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 96 predicate places. [2023-08-30 18:13:24,642 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 167 transitions, 1411 flow [2023-08-30 18:13:24,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 244.875) internal successors, (3918), 16 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:24,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:24,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:24,649 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 18:13:24,843 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,SelfDestructingSolverStorable27 [2023-08-30 18:13:24,844 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:24,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash 960878142, now seen corresponding path program 1 times [2023-08-30 18:13:24,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:24,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527499972] [2023-08-30 18:13:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:24,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:25,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:25,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527499972] [2023-08-30 18:13:25,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527499972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:25,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388211181] [2023-08-30 18:13:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:25,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:25,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:25,289 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 18:13:25,317 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 18:13:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:13:25,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:25,571 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:25,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:25,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 126 [2023-08-30 18:13:25,598 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:25,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 128 [2023-08-30 18:13:25,638 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 18:13:25,664 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 18:13:25,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:25,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:25,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:25,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:25,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:25,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:25,920 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1395 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1395) |c_~#A~0.base|) |c_~#A~0.offset|) 0)) is different from false [2023-08-30 18:13:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-30 18:13:25,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388211181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:25,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:25,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 18:13:25,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527283467] [2023-08-30 18:13:25,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:25,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 18:13:25,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 18:13:25,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2023-08-30 18:13:26,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 563 [2023-08-30 18:13:26,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 167 transitions, 1411 flow. Second operand has 17 states, 17 states have (on average 201.0) internal successors, (3417), 17 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:26,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:26,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 563 [2023-08-30 18:13:26,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:26,672 INFO L130 PetriNetUnfolder]: 816/2393 cut-off events. [2023-08-30 18:13:26,672 INFO L131 PetriNetUnfolder]: For 10902/10902 co-relation queries the response was YES. [2023-08-30 18:13:26,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 2393 events. 816/2393 cut-off events. For 10902/10902 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 18381 event pairs, 274 based on Foata normal form. 6/2292 useless extension candidates. Maximal degree in co-relation 9137. Up to 1352 conditions per place. [2023-08-30 18:13:26,685 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 190 selfloop transitions, 45 changer transitions 32/280 dead transitions. [2023-08-30 18:13:26,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 280 transitions, 2607 flow [2023-08-30 18:13:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 18:13:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 18:13:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4697 transitions. [2023-08-30 18:13:26,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36273071279635494 [2023-08-30 18:13:26,690 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4697 transitions. [2023-08-30 18:13:26,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4697 transitions. [2023-08-30 18:13:26,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:26,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4697 transitions. [2023-08-30 18:13:26,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 204.2173913043478) internal successors, (4697), 23 states have internal predecessors, (4697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:26,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 563.0) internal successors, (13512), 24 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:26,708 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 563.0) internal successors, (13512), 24 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:26,708 INFO L175 Difference]: Start difference. First operand has 183 places, 167 transitions, 1411 flow. Second operand 23 states and 4697 transitions. [2023-08-30 18:13:26,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 280 transitions, 2607 flow [2023-08-30 18:13:26,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 280 transitions, 2441 flow, removed 70 selfloop flow, removed 10 redundant places. [2023-08-30 18:13:26,747 INFO L231 Difference]: Finished difference. Result has 201 places, 180 transitions, 1599 flow [2023-08-30 18:13:26,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1599, PETRI_PLACES=201, PETRI_TRANSITIONS=180} [2023-08-30 18:13:26,748 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 114 predicate places. [2023-08-30 18:13:26,748 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 180 transitions, 1599 flow [2023-08-30 18:13:26,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 201.0) internal successors, (3417), 17 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:26,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:26,749 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:26,757 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 18:13:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 18:13:26,954 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:26,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash 846364677, now seen corresponding path program 2 times [2023-08-30 18:13:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:26,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250785393] [2023-08-30 18:13:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:27,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:27,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250785393] [2023-08-30 18:13:27,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250785393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:27,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978219606] [2023-08-30 18:13:27,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:13:27,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:27,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:27,421 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 18:13:27,450 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 18:13:27,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:13:27,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:13:27,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 18:13:27,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:27,803 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:27,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:27,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 126 [2023-08-30 18:13:27,887 INFO L321 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2023-08-30 18:13:27,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 141 treesize of output 160 [2023-08-30 18:13:27,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:13:27,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 18:13:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:13:28,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 18:13:28,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:28,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:28,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:13:28,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 18:13:28,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:28,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:28,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:28,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978219606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:28,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:28,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-30 18:13:28,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854567945] [2023-08-30 18:13:28,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:28,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:13:28,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:13:28,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:13:29,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 563 [2023-08-30 18:13:29,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 180 transitions, 1599 flow. Second operand has 18 states, 18 states have (on average 244.44444444444446) internal successors, (4400), 18 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:29,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:29,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 563 [2023-08-30 18:13:29,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:30,236 INFO L130 PetriNetUnfolder]: 804/2342 cut-off events. [2023-08-30 18:13:30,237 INFO L131 PetriNetUnfolder]: For 11453/11463 co-relation queries the response was YES. [2023-08-30 18:13:30,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9343 conditions, 2342 events. 804/2342 cut-off events. For 11453/11463 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 17867 event pairs, 308 based on Foata normal form. 3/2240 useless extension candidates. Maximal degree in co-relation 9233. Up to 1029 conditions per place. [2023-08-30 18:13:30,251 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 156 selfloop transitions, 25 changer transitions 43/236 dead transitions. [2023-08-30 18:13:30,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 236 transitions, 2420 flow [2023-08-30 18:13:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:13:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:13:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2502 transitions. [2023-08-30 18:13:30,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444404973357016 [2023-08-30 18:13:30,253 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2502 transitions. [2023-08-30 18:13:30,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2502 transitions. [2023-08-30 18:13:30,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:30,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2502 transitions. [2023-08-30 18:13:30,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 250.2) internal successors, (2502), 10 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:30,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 563.0) internal successors, (6193), 11 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:30,261 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 563.0) internal successors, (6193), 11 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:30,261 INFO L175 Difference]: Start difference. First operand has 201 places, 180 transitions, 1599 flow. Second operand 10 states and 2502 transitions. [2023-08-30 18:13:30,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 236 transitions, 2420 flow [2023-08-30 18:13:30,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 236 transitions, 2261 flow, removed 68 selfloop flow, removed 9 redundant places. [2023-08-30 18:13:30,301 INFO L231 Difference]: Finished difference. Result has 200 places, 151 transitions, 1315 flow [2023-08-30 18:13:30,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1315, PETRI_PLACES=200, PETRI_TRANSITIONS=151} [2023-08-30 18:13:30,302 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 113 predicate places. [2023-08-30 18:13:30,302 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 151 transitions, 1315 flow [2023-08-30 18:13:30,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 244.44444444444446) internal successors, (4400), 18 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:30,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:30,303 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:30,308 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 18:13:30,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:30,508 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:30,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash 291005508, now seen corresponding path program 2 times [2023-08-30 18:13:30,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:30,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881261979] [2023-08-30 18:13:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:30,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:30,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:30,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881261979] [2023-08-30 18:13:30,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881261979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:30,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991082055] [2023-08-30 18:13:30,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:13:30,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:30,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:30,852 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 18:13:30,854 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 18:13:31,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:13:31,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:13:31,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 18:13:31,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:31,125 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:31,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:31,167 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2023-08-30 18:13:31,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 158 [2023-08-30 18:13:31,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:13:31,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 18:13:31,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 18:13:31,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:31,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:31,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 18:13:31,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:31,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:31,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:32,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991082055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:32,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:32,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-30 18:13:32,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839983794] [2023-08-30 18:13:32,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:32,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:13:32,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:32,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:13:32,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:13:33,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 563 [2023-08-30 18:13:33,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 151 transitions, 1315 flow. Second operand has 18 states, 18 states have (on average 244.22222222222223) internal successors, (4396), 18 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:33,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:33,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 563 [2023-08-30 18:13:33,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:33,497 INFO L130 PetriNetUnfolder]: 689/1990 cut-off events. [2023-08-30 18:13:33,497 INFO L131 PetriNetUnfolder]: For 9197/9201 co-relation queries the response was YES. [2023-08-30 18:13:33,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7950 conditions, 1990 events. 689/1990 cut-off events. For 9197/9201 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 14480 event pairs, 260 based on Foata normal form. 3/1925 useless extension candidates. Maximal degree in co-relation 7423. Up to 886 conditions per place. [2023-08-30 18:13:33,508 INFO L137 encePairwiseOnDemand]: 551/563 looper letters, 79 selfloop transitions, 12 changer transitions 98/201 dead transitions. [2023-08-30 18:13:33,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 201 transitions, 2044 flow [2023-08-30 18:13:33,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:13:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:13:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2248 transitions. [2023-08-30 18:13:33,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44365502269587526 [2023-08-30 18:13:33,511 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2248 transitions. [2023-08-30 18:13:33,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2248 transitions. [2023-08-30 18:13:33,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:33,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2248 transitions. [2023-08-30 18:13:33,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 249.77777777777777) internal successors, (2248), 9 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:33,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:33,517 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:33,518 INFO L175 Difference]: Start difference. First operand has 200 places, 151 transitions, 1315 flow. Second operand 9 states and 2248 transitions. [2023-08-30 18:13:33,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 201 transitions, 2044 flow [2023-08-30 18:13:33,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 201 transitions, 1853 flow, removed 28 selfloop flow, removed 27 redundant places. [2023-08-30 18:13:33,545 INFO L231 Difference]: Finished difference. Result has 175 places, 84 transitions, 708 flow [2023-08-30 18:13:33,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=708, PETRI_PLACES=175, PETRI_TRANSITIONS=84} [2023-08-30 18:13:33,545 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 88 predicate places. [2023-08-30 18:13:33,545 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 84 transitions, 708 flow [2023-08-30 18:13:33,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 244.22222222222223) internal successors, (4396), 18 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:33,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:33,546 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:33,553 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 18:13:33,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:33,749 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:33,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1103531754, now seen corresponding path program 2 times [2023-08-30 18:13:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:33,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599074540] [2023-08-30 18:13:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:13:34,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:34,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599074540] [2023-08-30 18:13:34,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599074540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:34,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640559286] [2023-08-30 18:13:34,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:13:34,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:34,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:34,238 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 18:13:34,272 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 18:13:34,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:13:34,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:13:34,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 18:13:34,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:34,594 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:34,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:34,617 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:34,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:13:34,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 116 treesize of output 116 [2023-08-30 18:13:34,669 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 18:13:34,699 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 18:13:34,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:34,839 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 18:13:34,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:34,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:35,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 18:13:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:13:35,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:35,088 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1742 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1742) |c_~#A~0.base|) |c_~#A~0.offset|) 1)) is different from false [2023-08-30 18:13:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2023-08-30 18:13:35,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640559286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:35,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:35,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-30 18:13:35,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943533548] [2023-08-30 18:13:35,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:35,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:13:35,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:13:35,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=314, Unknown=1, NotChecked=36, Total=420 [2023-08-30 18:13:35,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 563 [2023-08-30 18:13:35,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 84 transitions, 708 flow. Second operand has 21 states, 21 states have (on average 200.47619047619048) internal successors, (4210), 21 states have internal predecessors, (4210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:35,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:35,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 563 [2023-08-30 18:13:35,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:35,663 INFO L130 PetriNetUnfolder]: 246/733 cut-off events. [2023-08-30 18:13:35,663 INFO L131 PetriNetUnfolder]: For 2691/2693 co-relation queries the response was YES. [2023-08-30 18:13:35,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 733 events. 246/733 cut-off events. For 2691/2693 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4034 event pairs, 127 based on Foata normal form. 3/734 useless extension candidates. Maximal degree in co-relation 2804. Up to 448 conditions per place. [2023-08-30 18:13:35,666 INFO L137 encePairwiseOnDemand]: 552/563 looper letters, 0 selfloop transitions, 0 changer transitions 101/101 dead transitions. [2023-08-30 18:13:35,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 101 transitions, 1037 flow [2023-08-30 18:13:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:13:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:13:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1818 transitions. [2023-08-30 18:13:35,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35879218472468916 [2023-08-30 18:13:35,669 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1818 transitions. [2023-08-30 18:13:35,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1818 transitions. [2023-08-30 18:13:35,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:35,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1818 transitions. [2023-08-30 18:13:35,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 202.0) internal successors, (1818), 9 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:35,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:35,673 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:35,673 INFO L175 Difference]: Start difference. First operand has 175 places, 84 transitions, 708 flow. Second operand 9 states and 1818 transitions. [2023-08-30 18:13:35,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 101 transitions, 1037 flow [2023-08-30 18:13:35,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 101 transitions, 845 flow, removed 39 selfloop flow, removed 29 redundant places. [2023-08-30 18:13:35,680 INFO L231 Difference]: Finished difference. Result has 113 places, 0 transitions, 0 flow [2023-08-30 18:13:35,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=113, PETRI_TRANSITIONS=0} [2023-08-30 18:13:35,680 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 26 predicate places. [2023-08-30 18:13:35,680 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 0 transitions, 0 flow [2023-08-30 18:13:35,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 200.47619047619048) internal successors, (4210), 21 states have internal predecessors, (4210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:35,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-30 18:13:35,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 18:13:35,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 18:13:35,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 18:13:35,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 18:13:35,689 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 18:13:35,881 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,SelfDestructingSolverStorable31 [2023-08-30 18:13:35,882 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 18:13:35,882 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 18:13:35,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 319 transitions, 668 flow [2023-08-30 18:13:35,948 INFO L130 PetriNetUnfolder]: 106/608 cut-off events. [2023-08-30 18:13:35,949 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 18:13:35,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 608 events. 106/608 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2559 event pairs, 1 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-08-30 18:13:35,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 319 transitions, 668 flow [2023-08-30 18:13:35,957 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 317 transitions, 664 flow [2023-08-30 18:13:35,957 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:13:35,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 317 transitions, 664 flow [2023-08-30 18:13:35,958 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 317 transitions, 664 flow [2023-08-30 18:13:35,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 317 transitions, 664 flow [2023-08-30 18:13:36,009 INFO L130 PetriNetUnfolder]: 105/606 cut-off events. [2023-08-30 18:13:36,009 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 18:13:36,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 606 events. 105/606 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2552 event pairs, 1 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 430. Up to 16 conditions per place. [2023-08-30 18:13:36,035 INFO L119 LiptonReduction]: Number of co-enabled transitions 47880 [2023-08-30 18:13:41,013 INFO L134 LiptonReduction]: Checked pairs total: 112969 [2023-08-30 18:13:41,013 INFO L136 LiptonReduction]: Total number of compositions: 239 [2023-08-30 18:13:41,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:13:41,015 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;@ca201ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:13:41,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 18:13:41,023 INFO L130 PetriNetUnfolder]: 58/172 cut-off events. [2023-08-30 18:13:41,023 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 18:13:41,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:41,024 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 18:13:41,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:13:41,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:41,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1482566382, now seen corresponding path program 1 times [2023-08-30 18:13:41,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:41,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970382886] [2023-08-30 18:13:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:41,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:13:41,037 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:13:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:13:41,050 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:13:41,051 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:13:41,051 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 18:13:41,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-30 18:13:41,051 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 18:13:41,052 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 18:13:41,052 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:13:41,052 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 18:13:41,076 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 18:13:41,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 378 transitions, 800 flow [2023-08-30 18:13:41,211 INFO L130 PetriNetUnfolder]: 152/856 cut-off events. [2023-08-30 18:13:41,211 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 18:13:41,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 856 events. 152/856 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3889 event pairs, 6 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 628. Up to 32 conditions per place. [2023-08-30 18:13:41,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 378 transitions, 800 flow [2023-08-30 18:13:41,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 376 transitions, 796 flow [2023-08-30 18:13:41,236 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:13:41,236 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 376 transitions, 796 flow [2023-08-30 18:13:41,236 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 376 transitions, 796 flow [2023-08-30 18:13:41,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 376 transitions, 796 flow [2023-08-30 18:13:41,354 INFO L130 PetriNetUnfolder]: 151/854 cut-off events. [2023-08-30 18:13:41,355 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 18:13:41,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 854 events. 151/854 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3888 event pairs, 6 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 626. Up to 32 conditions per place. [2023-08-30 18:13:41,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 77520 [2023-08-30 18:13:46,646 INFO L134 LiptonReduction]: Checked pairs total: 173327 [2023-08-30 18:13:46,647 INFO L136 LiptonReduction]: Total number of compositions: 288 [2023-08-30 18:13:46,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:13:46,648 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;@ca201ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:13:46,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 18:13:46,651 INFO L130 PetriNetUnfolder]: 7/26 cut-off events. [2023-08-30 18:13:46,651 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:13:46,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:46,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 18:13:46,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 18:13:46,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1204857714, now seen corresponding path program 1 times [2023-08-30 18:13:46,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:46,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607513703] [2023-08-30 18:13:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:46,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:46,670 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 18:13:46,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:46,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607513703] [2023-08-30 18:13:46,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607513703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:13:46,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:13:46,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:13:46,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456304459] [2023-08-30 18:13:46,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:13:46,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:13:46,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:46,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:13:46,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:13:46,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 666 [2023-08-30 18:13:46,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 160 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:46,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:46,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 666 [2023-08-30 18:13:46,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand