./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_93-evilcollapse_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_93-evilcollapse_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 dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --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 18:17:33,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:17:33,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:17:33,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:17:33,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:17:33,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:17:33,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:17:33,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:17:33,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:17:33,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:17:33,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:17:33,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:17:33,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:17:33,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:17:33,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:17:33,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:17:33,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:17:33,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:17:33,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:17:33,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:17:33,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:17:33,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:17:33,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:17:33,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:17:33,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:17:33,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:17:33,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:17:33,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:17:33,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:17:33,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:17:33,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:17:33,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:17:33,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:17:33,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:17:33,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:17:33,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:17:33,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:17:33,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:17:33,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:17:33,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:17:33,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:17:33,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:17:33,912 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:17:33,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:17:33,913 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:17:33,913 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:17:33,914 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:17:33,914 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:17:33,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:17:33,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:17:33,915 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:17:33,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:17:33,916 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:17:33,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:17:33,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:17:33,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:17:33,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:17:33,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:17:33,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:17:33,917 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:17:33,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:17:33,918 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:17:33,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:17:33,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:17:33,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:17:33,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:17:33,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:17:33,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:17:33,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:17:33,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:17:33,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:17:33,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:17:33,920 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:17:33,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:17:33,920 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:17:33,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:17:33,920 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:17:33,921 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:17:34,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:17:34,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:17:34,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:17:34,258 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:17:34,258 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:17:34,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2023-08-30 18:17:35,337 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:17:35,619 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:17:35,619 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2023-08-30 18:17:35,635 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc85f3731/179aa8a385d648128b236984cf028edf/FLAGa3672416c [2023-08-30 18:17:35,649 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc85f3731/179aa8a385d648128b236984cf028edf [2023-08-30 18:17:35,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:17:35,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:17:35,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:17:35,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:17:35,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:17:35,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:17:35" (1/1) ... [2023-08-30 18:17:35,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f7460b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:35, skipping insertion in model container [2023-08-30 18:17:35,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:17:35" (1/1) ... [2023-08-30 18:17:35,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:17:35,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:17:36,036 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_93-evilcollapse_racefree.i[47038,47051] [2023-08-30 18:17:36,101 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:17:36,101 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:17:36,102 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:17:36,102 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:17:36,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:17:36,135 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:17:36,163 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_93-evilcollapse_racefree.i[47038,47051] [2023-08-30 18:17:36,165 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:17:36,166 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:17:36,166 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:17:36,166 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:17:36,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:17:36,227 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:17:36,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36 WrapperNode [2023-08-30 18:17:36,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:17:36,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:17:36,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:17:36,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:17:36,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,306 INFO L138 Inliner]: procedures = 279, calls = 51, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 228 [2023-08-30 18:17:36,307 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:17:36,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:17:36,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:17:36,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:17:36,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,342 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:17:36,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:17:36,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:17:36,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:17:36,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (1/1) ... [2023-08-30 18:17:36,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:17:36,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:17:36,401 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 18:17:36,423 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 18:17:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:17:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 18:17:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:17:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:17:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:17:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 18:17:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:17:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:17:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 18:17:36,438 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 18:17:36,438 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 18:17:36,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:17:36,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:17:36,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:17:36,440 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 18:17:36,641 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:17:36,643 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:17:37,047 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:17:37,059 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:17:37,059 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-30 18:17:37,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:17:37 BoogieIcfgContainer [2023-08-30 18:17:37,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:17:37,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:17:37,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:17:37,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:17:37,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:17:35" (1/3) ... [2023-08-30 18:17:37,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d8789d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:17:37, skipping insertion in model container [2023-08-30 18:17:37,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:17:36" (2/3) ... [2023-08-30 18:17:37,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d8789d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:17:37, skipping insertion in model container [2023-08-30 18:17:37,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:17:37" (3/3) ... [2023-08-30 18:17:37,070 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_93-evilcollapse_racefree.i [2023-08-30 18:17:37,077 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:17:37,085 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:17:37,086 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:17:37,086 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:17:37,173 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 18:17:37,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 237 transitions, 482 flow [2023-08-30 18:17:37,327 INFO L130 PetriNetUnfolder]: 29/253 cut-off events. [2023-08-30 18:17:37,327 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-30 18:17:37,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 253 events. 29/253 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 514 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 138. Up to 4 conditions per place. [2023-08-30 18:17:37,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 237 transitions, 482 flow [2023-08-30 18:17:37,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 232 transitions, 469 flow [2023-08-30 18:17:37,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:17:37,360 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 232 transitions, 469 flow [2023-08-30 18:17:37,364 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 232 transitions, 469 flow [2023-08-30 18:17:37,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 232 transitions, 469 flow [2023-08-30 18:17:37,420 INFO L130 PetriNetUnfolder]: 28/248 cut-off events. [2023-08-30 18:17:37,421 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:17:37,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 248 events. 28/248 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 471 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 4 conditions per place. [2023-08-30 18:17:37,426 INFO L119 LiptonReduction]: Number of co-enabled transitions 3828 [2023-08-30 18:17:51,439 WARN L222 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:17:56,876 WARN L222 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:18:02,921 WARN L222 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:18:07,761 INFO L134 LiptonReduction]: Checked pairs total: 3403 [2023-08-30 18:18:07,762 INFO L136 LiptonReduction]: Total number of compositions: 241 [2023-08-30 18:18:07,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:18:07,777 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;@13202fe8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:18:07,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:18:07,783 INFO L130 PetriNetUnfolder]: 6/24 cut-off events. [2023-08-30 18:18:07,783 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:18:07,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:18:07,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:18:07,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:18:07,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:18:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash -11794566, now seen corresponding path program 1 times [2023-08-30 18:18:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:18:07,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917200568] [2023-08-30 18:18:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:18:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:18:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:18:08,178 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 18:18:08,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:18:08,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917200568] [2023-08-30 18:18:08,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917200568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:18:08,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:18:08,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:18:08,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239066022] [2023-08-30 18:18:08,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:18:08,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:18:08,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:18:08,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:18:08,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:18:08,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 478 [2023-08-30 18:18:08,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:08,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:18:08,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 478 [2023-08-30 18:18:08,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:18:08,455 INFO L130 PetriNetUnfolder]: 48/112 cut-off events. [2023-08-30 18:18:08,455 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:18:08,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 112 events. 48/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 275 event pairs, 33 based on Foata normal form. 8/92 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2023-08-30 18:18:08,457 INFO L137 encePairwiseOnDemand]: 465/478 looper letters, 22 selfloop transitions, 2 changer transitions 1/29 dead transitions. [2023-08-30 18:18:08,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 113 flow [2023-08-30 18:18:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:18:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:18:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2023-08-30 18:18:08,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46443514644351463 [2023-08-30 18:18:08,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2023-08-30 18:18:08,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2023-08-30 18:18:08,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:18:08,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2023-08-30 18:18:08,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:08,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:08,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:08,493 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 77 flow. Second operand 3 states and 666 transitions. [2023-08-30 18:18:08,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 113 flow [2023-08-30 18:18:08,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 113 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:18:08,497 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 67 flow [2023-08-30 18:18:08,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-30 18:18:08,501 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-30 18:18:08,502 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 67 flow [2023-08-30 18:18:08,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:08,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:18:08,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:18:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:18:08,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:18:08,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:18:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash -995339352, now seen corresponding path program 1 times [2023-08-30 18:18:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:18:08,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216630966] [2023-08-30 18:18:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:18:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:18:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:18:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:18:08,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:18:08,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216630966] [2023-08-30 18:18:08,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216630966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:18:08,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:18:08,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:18:08,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120774662] [2023-08-30 18:18:08,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:18:08,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:18:08,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:18:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:18:08,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:18:08,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 478 [2023-08-30 18:18:08,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:08,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:18:08,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 478 [2023-08-30 18:18:08,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:18:08,719 INFO L130 PetriNetUnfolder]: 45/107 cut-off events. [2023-08-30 18:18:08,720 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:18:08,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 107 events. 45/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 242 event pairs, 30 based on Foata normal form. 2/89 useless extension candidates. Maximal degree in co-relation 196. Up to 93 conditions per place. [2023-08-30 18:18:08,721 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 21 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-30 18:18:08,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 115 flow [2023-08-30 18:18:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:18:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:18:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2023-08-30 18:18:08,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45536959553695955 [2023-08-30 18:18:08,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2023-08-30 18:18:08,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2023-08-30 18:18:08,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:18:08,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2023-08-30 18:18:08,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:08,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:08,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:08,731 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 67 flow. Second operand 3 states and 653 transitions. [2023-08-30 18:18:08,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 115 flow [2023-08-30 18:18:08,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:18:08,732 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 79 flow [2023-08-30 18:18:08,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-30 18:18:08,733 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-30 18:18:08,733 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 79 flow [2023-08-30 18:18:08,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:08,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:18:08,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:18:08,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 18:18:08,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:18:08,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:18:08,735 INFO L85 PathProgramCache]: Analyzing trace with hash 804366018, now seen corresponding path program 1 times [2023-08-30 18:18:08,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:18:08,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58372295] [2023-08-30 18:18:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:18:08,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:18:08,774 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:18:08,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442179578] [2023-08-30 18:18:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:18:08,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:18:08,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:18:08,781 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 18:18:08,796 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 18:18:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:18:08,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:18:08,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:18:09,024 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 18:18:09,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:18:09,040 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 18:18:09,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:18:09,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58372295] [2023-08-30 18:18:09,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:18:09,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442179578] [2023-08-30 18:18:09,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442179578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:18:09,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:18:09,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 18:18:09,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962826676] [2023-08-30 18:18:09,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:18:09,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:18:09,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:18:09,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:18:09,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:18:09,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 478 [2023-08-30 18:18:09,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 79 flow. Second operand has 6 states, 6 states have (on average 211.33333333333334) internal successors, (1268), 6 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:09,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:18:09,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 478 [2023-08-30 18:18:09,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:18:09,319 INFO L130 PetriNetUnfolder]: 45/113 cut-off events. [2023-08-30 18:18:09,319 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 18:18:09,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 113 events. 45/113 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 253 event pairs, 30 based on Foata normal form. 6/99 useless extension candidates. Maximal degree in co-relation 203. Up to 93 conditions per place. [2023-08-30 18:18:09,320 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 21 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-08-30 18:18:09,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 143 flow [2023-08-30 18:18:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:18:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:18:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1282 transitions. [2023-08-30 18:18:09,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44700139470013944 [2023-08-30 18:18:09,325 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1282 transitions. [2023-08-30 18:18:09,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1282 transitions. [2023-08-30 18:18:09,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:18:09,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1282 transitions. [2023-08-30 18:18:09,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:09,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:09,336 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:09,336 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 79 flow. Second operand 6 states and 1282 transitions. [2023-08-30 18:18:09,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 143 flow [2023-08-30 18:18:09,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:18:09,338 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 117 flow [2023-08-30 18:18:09,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 18:18:09,339 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2023-08-30 18:18:09,339 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 117 flow [2023-08-30 18:18:09,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.33333333333334) internal successors, (1268), 6 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:09,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:18:09,340 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:18:09,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 18:18:09,547 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 18:18:09,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:18:09,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:18:09,548 INFO L85 PathProgramCache]: Analyzing trace with hash 351619624, now seen corresponding path program 2 times [2023-08-30 18:18:09,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:18:09,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117161456] [2023-08-30 18:18:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:18:09,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:18:09,623 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:18:09,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067436543] [2023-08-30 18:18:09,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:18:09,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:18:09,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:18:09,628 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 18:18:09,649 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 18:18:09,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:18:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:18:09,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:18:10,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:18:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:18:10,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:18:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:18:10,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:18:10,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117161456] [2023-08-30 18:18:10,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:18:10,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067436543] [2023-08-30 18:18:10,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067436543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:18:10,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:18:10,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-30 18:18:10,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669687043] [2023-08-30 18:18:10,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:18:10,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:18:10,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:18:10,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:18:10,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 18:18:10,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 478 [2023-08-30 18:18:10,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 117 flow. Second operand has 12 states, 12 states have (on average 210.66666666666666) internal successors, (2528), 12 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:10,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:18:10,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 478 [2023-08-30 18:18:10,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:18:10,798 INFO L130 PetriNetUnfolder]: 45/125 cut-off events. [2023-08-30 18:18:10,799 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 18:18:10,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 125 events. 45/125 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 303 event pairs, 30 based on Foata normal form. 12/117 useless extension candidates. Maximal degree in co-relation 199. Up to 93 conditions per place. [2023-08-30 18:18:10,800 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 21 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-08-30 18:18:10,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 217 flow [2023-08-30 18:18:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:18:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:18:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2545 transitions. [2023-08-30 18:18:10,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4436889818688982 [2023-08-30 18:18:10,807 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2545 transitions. [2023-08-30 18:18:10,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2545 transitions. [2023-08-30 18:18:10,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:18:10,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2545 transitions. [2023-08-30 18:18:10,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 212.08333333333334) internal successors, (2545), 12 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:10,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:10,850 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:10,850 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 117 flow. Second operand 12 states and 2545 transitions. [2023-08-30 18:18:10,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 217 flow [2023-08-30 18:18:10,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 203 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:18:10,853 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 199 flow [2023-08-30 18:18:10,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=199, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2023-08-30 18:18:10,854 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 26 predicate places. [2023-08-30 18:18:10,854 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 199 flow [2023-08-30 18:18:10,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 210.66666666666666) internal successors, (2528), 12 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:10,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:18:10,855 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:18:10,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 18:18:11,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 18:18:11,063 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:18:11,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:18:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash 965878760, now seen corresponding path program 3 times [2023-08-30 18:18:11,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:18:11,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845869595] [2023-08-30 18:18:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:18:11,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:18:11,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:18:11,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593210656] [2023-08-30 18:18:11,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:18:11,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:18:11,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:18:11,187 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 18:18:11,211 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 18:18:11,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:18:11,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:18:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:18:11,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:18:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:18:11,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:18:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:18:11,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:18:11,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845869595] [2023-08-30 18:18:11,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:18:11,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593210656] [2023-08-30 18:18:11,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593210656] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:18:11,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:18:11,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-30 18:18:11,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100274672] [2023-08-30 18:18:11,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:18:11,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:18:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:18:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:18:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:18:11,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 478 [2023-08-30 18:18:11,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 211.66666666666666) internal successors, (1270), 6 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:11,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:18:11,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 478 [2023-08-30 18:18:11,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:18:12,317 INFO L130 PetriNetUnfolder]: 47/152 cut-off events. [2023-08-30 18:18:12,317 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-30 18:18:12,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 152 events. 47/152 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 241 event pairs, 30 based on Foata normal form. 3/135 useless extension candidates. Maximal degree in co-relation 310. Up to 87 conditions per place. [2023-08-30 18:18:12,319 INFO L137 encePairwiseOnDemand]: 474/478 looper letters, 65 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2023-08-30 18:18:12,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 690 flow [2023-08-30 18:18:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:18:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:18:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1288 transitions. [2023-08-30 18:18:12,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490934449093445 [2023-08-30 18:18:12,323 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1288 transitions. [2023-08-30 18:18:12,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1288 transitions. [2023-08-30 18:18:12,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:18:12,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1288 transitions. [2023-08-30 18:18:12,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.66666666666666) internal successors, (1288), 6 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:12,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:12,332 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:12,332 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 199 flow. Second operand 6 states and 1288 transitions. [2023-08-30 18:18:12,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 690 flow [2023-08-30 18:18:12,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 496 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-30 18:18:12,337 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 234 flow [2023-08-30 18:18:12,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2023-08-30 18:18:12,338 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2023-08-30 18:18:12,338 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 234 flow [2023-08-30 18:18:12,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.66666666666666) internal successors, (1270), 6 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:12,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:18:12,339 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:18:12,346 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 18:18:12,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:18:12,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:18:12,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:18:12,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1171471154, now seen corresponding path program 4 times [2023-08-30 18:18:12,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:18:12,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545886262] [2023-08-30 18:18:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:18:12,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:18:12,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:18:12,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111129301] [2023-08-30 18:18:12,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:18:12,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:18:12,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:18:12,991 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 18:18:13,015 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 18:18:15,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:18:15,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:18:15,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 9518 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 18:18:15,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:18:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-08-30 18:18:15,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:18:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-08-30 18:18:15,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:18:15,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545886262] [2023-08-30 18:18:15,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:18:15,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111129301] [2023-08-30 18:18:15,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111129301] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:18:15,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:18:15,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-08-30 18:18:15,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006605020] [2023-08-30 18:18:15,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:18:15,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:18:15,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:18:15,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:18:15,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:18:15,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 478 [2023-08-30 18:18:15,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 234 flow. Second operand has 24 states, 24 states have (on average 210.45833333333334) internal successors, (5051), 24 states have internal predecessors, (5051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:15,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:18:15,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 478 [2023-08-30 18:18:15,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:18:17,426 INFO L130 PetriNetUnfolder]: 47/200 cut-off events. [2023-08-30 18:18:17,427 INFO L131 PetriNetUnfolder]: For 3489/3489 co-relation queries the response was YES. [2023-08-30 18:18:17,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 200 events. 47/200 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 241 event pairs, 30 based on Foata normal form. 48/228 useless extension candidates. Maximal degree in co-relation 423. Up to 99 conditions per place. [2023-08-30 18:18:17,431 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 23 selfloop transitions, 24 changer transitions 0/51 dead transitions. [2023-08-30 18:18:17,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 51 transitions, 400 flow [2023-08-30 18:18:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 18:18:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 18:18:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5071 transitions. [2023-08-30 18:18:17,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44203277545327757 [2023-08-30 18:18:17,446 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5071 transitions. [2023-08-30 18:18:17,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5071 transitions. [2023-08-30 18:18:17,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:18:17,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5071 transitions. [2023-08-30 18:18:17,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 211.29166666666666) internal successors, (5071), 24 states have internal predecessors, (5071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:17,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 478.0) internal successors, (11950), 25 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:17,482 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 478.0) internal successors, (11950), 25 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:17,482 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 234 flow. Second operand 24 states and 5071 transitions. [2023-08-30 18:18:17,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 51 transitions, 400 flow [2023-08-30 18:18:17,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 51 transitions, 392 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 18:18:17,487 INFO L231 Difference]: Finished difference. Result has 89 places, 51 transitions, 468 flow [2023-08-30 18:18:17,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=468, PETRI_PLACES=89, PETRI_TRANSITIONS=51} [2023-08-30 18:18:17,489 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 64 predicate places. [2023-08-30 18:18:17,490 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 51 transitions, 468 flow [2023-08-30 18:18:17,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 210.45833333333334) internal successors, (5051), 24 states have internal predecessors, (5051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:18:17,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:18:17,505 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:18:17,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 18:18:17,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:18:17,724 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:18:17,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:18:17,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1437136078, now seen corresponding path program 5 times [2023-08-30 18:18:17,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:18:17,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422828413] [2023-08-30 18:18:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:18:17,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:18:18,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:18:18,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458362717] [2023-08-30 18:18:18,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:18:18,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:18:18,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:18:18,541 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 18:18:18,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15