./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.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_07-cond_racing2.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 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef --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 17:45:46,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:45:46,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:45:46,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:45:46,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:45:46,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:45:46,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:45:46,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:45:46,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:45:46,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:45:46,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:45:46,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:45:46,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:45:46,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:45:46,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:45:46,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:45:46,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:45:46,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:45:46,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:45:46,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:45:46,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:45:46,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:45:46,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:45:46,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:45:46,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:45:46,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:45:46,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:45:46,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:45:46,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:45:46,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:45:46,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:45:46,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:45:46,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:45:46,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:45:46,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:45:46,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:45:46,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:45:46,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:45:46,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:45:46,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:45:46,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:45:46,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:45:46,914 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:45:46,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:45:46,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:45:46,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:45:46,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:45:46,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:45:46,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:45:46,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:45:46,917 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:45:46,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:45:46,918 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:45:46,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:45:46,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:45:46,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:45:46,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:45:46,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:45:46,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:45:46,920 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:45:46,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:45:46,920 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:45:46,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:45:46,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:45:46,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:45:46,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:45:46,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:45:46,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:45:46,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:45:46,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:45:46,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:45:46,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:45:46,922 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:45:46,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:45:46,923 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:45:46,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:45:46,923 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:45:46,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:45:47,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:45:47,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:45:47,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:45:47,258 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:45:47,259 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:45:47,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-30 17:45:48,464 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:45:48,703 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:45:48,707 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-30 17:45:48,726 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0659a354/6a691df2e52147c1a2c5765b4cd27ad2/FLAGa7813c1d7 [2023-08-30 17:45:48,737 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0659a354/6a691df2e52147c1a2c5765b4cd27ad2 [2023-08-30 17:45:48,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:45:48,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:45:48,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:45:48,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:45:48,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:45:48,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:45:48" (1/1) ... [2023-08-30 17:45:48,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b37242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:48, skipping insertion in model container [2023-08-30 17:45:48,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:45:48" (1/1) ... [2023-08-30 17:45:48,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:45:48,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:45:49,131 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_07-cond_racing2.i[41322,41335] [2023-08-30 17:45:49,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:45:49,170 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:45:49,211 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_07-cond_racing2.i[41322,41335] [2023-08-30 17:45:49,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:45:49,288 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:45:49,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49 WrapperNode [2023-08-30 17:45:49,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:45:49,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:45:49,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:45:49,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:45:49,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,352 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2023-08-30 17:45:49,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:45:49,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:45:49,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:45:49,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:45:49,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,398 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:45:49,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:45:49,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:45:49,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:45:49,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (1/1) ... [2023-08-30 17:45:49,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:45:49,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:45:49,443 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 17:45:49,445 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 17:45:49,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:45:49,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:45:49,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:45:49,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:45:49,477 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:45:49,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:45:49,477 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:45:49,477 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:45:49,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:45:49,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:45:49,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:45:49,479 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 17:45:49,585 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:45:49,587 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:45:49,863 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:45:49,870 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:45:49,870 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 17:45:49,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:45:49 BoogieIcfgContainer [2023-08-30 17:45:49,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:45:49,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:45:49,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:45:49,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:45:49,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:45:48" (1/3) ... [2023-08-30 17:45:49,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f3c406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:45:49, skipping insertion in model container [2023-08-30 17:45:49,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:49" (2/3) ... [2023-08-30 17:45:49,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f3c406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:45:49, skipping insertion in model container [2023-08-30 17:45:49,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:45:49" (3/3) ... [2023-08-30 17:45:49,888 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2023-08-30 17:45:49,896 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:45:49,904 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:45:49,905 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:45:49,905 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:45:49,988 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:45:50,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 121 transitions, 250 flow [2023-08-30 17:45:50,109 INFO L130 PetriNetUnfolder]: 23/163 cut-off events. [2023-08-30 17:45:50,110 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:45:50,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 163 events. 23/163 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 81. Up to 6 conditions per place. [2023-08-30 17:45:50,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 121 transitions, 250 flow [2023-08-30 17:45:50,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 116 transitions, 237 flow [2023-08-30 17:45:50,124 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:45:50,145 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 116 transitions, 237 flow [2023-08-30 17:45:50,151 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 116 transitions, 237 flow [2023-08-30 17:45:50,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 116 transitions, 237 flow [2023-08-30 17:45:50,183 INFO L130 PetriNetUnfolder]: 22/158 cut-off events. [2023-08-30 17:45:50,185 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:50,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 158 events. 22/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 349 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 81. Up to 6 conditions per place. [2023-08-30 17:45:50,190 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 17:45:53,236 INFO L134 LiptonReduction]: Checked pairs total: 4289 [2023-08-30 17:45:53,237 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-30 17:45:53,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:45:53,254 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;@587bb43d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:45:53,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:45:53,257 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 17:45:53,257 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:53,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:53,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:45:53,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:45:53,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:53,263 INFO L85 PathProgramCache]: Analyzing trace with hash 14433895, now seen corresponding path program 1 times [2023-08-30 17:45:53,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:53,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769128527] [2023-08-30 17:45:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:53,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:53,617 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 17:45:53,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:45:53,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769128527] [2023-08-30 17:45:53,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769128527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:45:53,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:45:53,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:45:53,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766625435] [2023-08-30 17:45:53,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:45:53,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:45:53,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:45:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:45:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:45:53,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 224 [2023-08-30 17:45:53,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:53,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:45:53,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 224 [2023-08-30 17:45:53,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:45:53,782 INFO L130 PetriNetUnfolder]: 97/210 cut-off events. [2023-08-30 17:45:53,783 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:53,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 210 events. 97/210 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 739 event pairs, 70 based on Foata normal form. 12/186 useless extension candidates. Maximal degree in co-relation 409. Up to 197 conditions per place. [2023-08-30 17:45:53,785 INFO L137 encePairwiseOnDemand]: 212/224 looper letters, 21 selfloop transitions, 2 changer transitions 9/33 dead transitions. [2023-08-30 17:45:53,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 133 flow [2023-08-30 17:45:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:45:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:45:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-08-30 17:45:53,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2023-08-30 17:45:53,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-08-30 17:45:53,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-08-30 17:45:53,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:45:53,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-08-30 17:45:53,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:53,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:53,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:53,823 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 356 transitions. [2023-08-30 17:45:53,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 133 flow [2023-08-30 17:45:53,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:45:53,827 INFO L231 Difference]: Finished difference. Result has 29 places, 16 transitions, 43 flow [2023-08-30 17:45:53,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2023-08-30 17:45:53,831 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-30 17:45:53,832 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 43 flow [2023-08-30 17:45:53,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:53,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:53,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:45:53,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:45:53,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:45:53,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash -595896086, now seen corresponding path program 1 times [2023-08-30 17:45:53,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:53,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42759465] [2023-08-30 17:45:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:53,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:45:54,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:45:54,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42759465] [2023-08-30 17:45:54,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42759465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:45:54,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:45:54,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:45:54,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593434608] [2023-08-30 17:45:54,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:45:54,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:45:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:45:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:45:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:45:54,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 224 [2023-08-30 17:45:54,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:54,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:45:54,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 224 [2023-08-30 17:45:54,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:45:54,052 INFO L130 PetriNetUnfolder]: 37/91 cut-off events. [2023-08-30 17:45:54,052 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 17:45:54,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 91 events. 37/91 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 230 event pairs, 13 based on Foata normal form. 3/93 useless extension candidates. Maximal degree in co-relation 202. Up to 66 conditions per place. [2023-08-30 17:45:54,053 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 16 selfloop transitions, 2 changer transitions 1/20 dead transitions. [2023-08-30 17:45:54,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 94 flow [2023-08-30 17:45:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:45:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:45:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-08-30 17:45:54,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2023-08-30 17:45:54,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-08-30 17:45:54,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-08-30 17:45:54,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:45:54,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-08-30 17:45:54,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:54,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:54,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:54,059 INFO L175 Difference]: Start difference. First operand has 29 places, 16 transitions, 43 flow. Second operand 3 states and 332 transitions. [2023-08-30 17:45:54,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 94 flow [2023-08-30 17:45:54,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 20 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 17:45:54,061 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 47 flow [2023-08-30 17:45:54,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-08-30 17:45:54,061 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-08-30 17:45:54,062 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 47 flow [2023-08-30 17:45:54,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:54,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:54,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:45:54,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 17:45:54,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:45:54,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1171259821, now seen corresponding path program 1 times [2023-08-30 17:45:54,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:54,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996192043] [2023-08-30 17:45:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:54,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:45:54,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:45:54,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996192043] [2023-08-30 17:45:54,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996192043] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:45:54,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109411320] [2023-08-30 17:45:54,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:54,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:45:54,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:45:54,124 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 17:45:54,136 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 17:45:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:54,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:45:54,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:45:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:45:54,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:45:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:45:54,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109411320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:45:54,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:45:54,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:45:54,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354747633] [2023-08-30 17:45:54,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:45:54,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:45:54,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:45:54,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:45:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:45:54,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 224 [2023-08-30 17:45:54,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 105.28571428571429) internal successors, (737), 7 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:54,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:45:54,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 224 [2023-08-30 17:45:54,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:45:54,432 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-30 17:45:54,432 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 17:45:54,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 46 events. 16/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 100. Up to 34 conditions per place. [2023-08-30 17:45:54,433 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-30 17:45:54,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 100 flow [2023-08-30 17:45:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:45:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:45:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 430 transitions. [2023-08-30 17:45:54,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799107142857143 [2023-08-30 17:45:54,435 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 430 transitions. [2023-08-30 17:45:54,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 430 transitions. [2023-08-30 17:45:54,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:45:54,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 430 transitions. [2023-08-30 17:45:54,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:54,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:54,443 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:54,443 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 47 flow. Second operand 4 states and 430 transitions. [2023-08-30 17:45:54,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 100 flow [2023-08-30 17:45:54,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 17:45:54,444 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-30 17:45:54,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-30 17:45:54,446 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -7 predicate places. [2023-08-30 17:45:54,446 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-30 17:45:54,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 105.28571428571429) internal successors, (737), 7 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:54,449 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:45:54,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 17:45:54,655 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 17:45:54,656 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:45:54,658 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:45:54,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 121 transitions, 250 flow [2023-08-30 17:45:54,679 INFO L130 PetriNetUnfolder]: 23/163 cut-off events. [2023-08-30 17:45:54,680 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:45:54,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 163 events. 23/163 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 81. Up to 6 conditions per place. [2023-08-30 17:45:54,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 121 transitions, 250 flow [2023-08-30 17:45:54,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 116 transitions, 237 flow [2023-08-30 17:45:54,682 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:45:54,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 116 transitions, 237 flow [2023-08-30 17:45:54,683 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 116 transitions, 237 flow [2023-08-30 17:45:54,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 116 transitions, 237 flow [2023-08-30 17:45:54,695 INFO L130 PetriNetUnfolder]: 22/158 cut-off events. [2023-08-30 17:45:54,695 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:54,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 158 events. 22/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 349 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 81. Up to 6 conditions per place. [2023-08-30 17:45:54,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 17:45:57,365 INFO L134 LiptonReduction]: Checked pairs total: 4267 [2023-08-30 17:45:57,366 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-30 17:45:57,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:45:57,369 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;@587bb43d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:45:57,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:45:57,371 INFO L130 PetriNetUnfolder]: 4/25 cut-off events. [2023-08-30 17:45:57,372 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:57,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:57,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:45:57,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:45:57,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:57,373 INFO L85 PathProgramCache]: Analyzing trace with hash -292019310, now seen corresponding path program 1 times [2023-08-30 17:45:57,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:57,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063677593] [2023-08-30 17:45:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:57,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:45:57,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:45:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:45:57,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:45:57,432 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:45:57,432 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:45:57,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:45:57,432 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:45:57,433 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:45:57,434 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:45:57,434 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:45:57,454 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:45:57,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 151 transitions, 320 flow [2023-08-30 17:45:57,484 INFO L130 PetriNetUnfolder]: 40/259 cut-off events. [2023-08-30 17:45:57,484 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:45:57,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 40/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 723 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 165. Up to 9 conditions per place. [2023-08-30 17:45:57,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 151 transitions, 320 flow [2023-08-30 17:45:57,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 151 transitions, 320 flow [2023-08-30 17:45:57,489 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:45:57,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 151 transitions, 320 flow [2023-08-30 17:45:57,490 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 151 transitions, 320 flow [2023-08-30 17:45:57,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 151 transitions, 320 flow [2023-08-30 17:45:57,511 INFO L130 PetriNetUnfolder]: 40/259 cut-off events. [2023-08-30 17:45:57,511 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:45:57,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 40/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 723 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 165. Up to 9 conditions per place. [2023-08-30 17:45:57,517 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-30 17:46:00,115 INFO L134 LiptonReduction]: Checked pairs total: 17052 [2023-08-30 17:46:00,115 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-30 17:46:00,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:46:00,118 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;@587bb43d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:46:00,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:46:00,120 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 17:46:00,120 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:46:00,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:00,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:46:00,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:00,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:00,121 INFO L85 PathProgramCache]: Analyzing trace with hash 26777844, now seen corresponding path program 1 times [2023-08-30 17:46:00,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:00,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615712927] [2023-08-30 17:46:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:00,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:00,168 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 17:46:00,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:00,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615712927] [2023-08-30 17:46:00,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615712927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:46:00,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:46:00,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:46:00,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612888649] [2023-08-30 17:46:00,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:46:00,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:46:00,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:46:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:46:00,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 268 [2023-08-30 17:46:00,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:00,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 268 [2023-08-30 17:46:00,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:00,434 INFO L130 PetriNetUnfolder]: 1446/2610 cut-off events. [2023-08-30 17:46:00,435 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:46:00,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 2610 events. 1446/2610 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 15923 event pairs, 648 based on Foata normal form. 290/2601 useless extension candidates. Maximal degree in co-relation 669. Up to 2327 conditions per place. [2023-08-30 17:46:00,443 INFO L137 encePairwiseOnDemand]: 250/268 looper letters, 28 selfloop transitions, 2 changer transitions 12/51 dead transitions. [2023-08-30 17:46:00,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 200 flow [2023-08-30 17:46:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:46:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:46:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2023-08-30 17:46:00,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435323383084577 [2023-08-30 17:46:00,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2023-08-30 17:46:00,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2023-08-30 17:46:00,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:00,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2023-08-30 17:46:00,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,449 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 437 transitions. [2023-08-30 17:46:00,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 200 flow [2023-08-30 17:46:00,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:46:00,452 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 82 flow [2023-08-30 17:46:00,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2023-08-30 17:46:00,458 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-30 17:46:00,459 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 82 flow [2023-08-30 17:46:00,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:00,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:46:00,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 17:46:00,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:00,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash 542627917, now seen corresponding path program 1 times [2023-08-30 17:46:00,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:00,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298138025] [2023-08-30 17:46:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:00,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:46:00,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:00,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298138025] [2023-08-30 17:46:00,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298138025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:46:00,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:46:00,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:46:00,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839180975] [2023-08-30 17:46:00,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:46:00,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:46:00,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:00,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:46:00,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:46:00,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 268 [2023-08-30 17:46:00,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:00,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 268 [2023-08-30 17:46:00,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:00,686 INFO L130 PetriNetUnfolder]: 811/1455 cut-off events. [2023-08-30 17:46:00,686 INFO L131 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2023-08-30 17:46:00,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021 conditions, 1455 events. 811/1455 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7519 event pairs, 313 based on Foata normal form. 12/1464 useless extension candidates. Maximal degree in co-relation 2950. Up to 1218 conditions per place. [2023-08-30 17:46:00,693 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 34 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-08-30 17:46:00,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 192 flow [2023-08-30 17:46:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:46:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:46:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-08-30 17:46:00,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074626865671642 [2023-08-30 17:46:00,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-08-30 17:46:00,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-08-30 17:46:00,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:00,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-08-30 17:46:00,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,703 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 82 flow. Second operand 3 states and 408 transitions. [2023-08-30 17:46:00,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 192 flow [2023-08-30 17:46:00,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:46:00,705 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 99 flow [2023-08-30 17:46:00,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-30 17:46:00,707 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2023-08-30 17:46:00,707 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 99 flow [2023-08-30 17:46:00,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:00,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:46:00,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:46:00,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:00,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:00,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1095377554, now seen corresponding path program 1 times [2023-08-30 17:46:00,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:00,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084842008] [2023-08-30 17:46:00,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:00,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:46:00,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:00,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084842008] [2023-08-30 17:46:00,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084842008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:46:00,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967329822] [2023-08-30 17:46:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:00,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:46:00,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:46:00,785 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 17:46:00,812 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 17:46:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:00,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:46:00,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:46:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:46:00,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:46:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:46:00,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967329822] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:46:00,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:46:00,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:46:00,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465315470] [2023-08-30 17:46:00,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:46:00,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:46:00,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:00,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:46:00,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:46:00,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 268 [2023-08-30 17:46:00,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 99 flow. Second operand has 7 states, 7 states have (on average 126.85714285714286) internal successors, (888), 7 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:00,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:00,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 268 [2023-08-30 17:46:00,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:01,015 INFO L130 PetriNetUnfolder]: 301/582 cut-off events. [2023-08-30 17:46:01,015 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2023-08-30 17:46:01,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 582 events. 301/582 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2700 event pairs, 55 based on Foata normal form. 76/657 useless extension candidates. Maximal degree in co-relation 803. Up to 370 conditions per place. [2023-08-30 17:46:01,017 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-30 17:46:01,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 228 flow [2023-08-30 17:46:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:46:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:46:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-08-30 17:46:01,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4955223880597015 [2023-08-30 17:46:01,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-08-30 17:46:01,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-08-30 17:46:01,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:01,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-08-30 17:46:01,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:01,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:01,024 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:01,025 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 99 flow. Second operand 5 states and 664 transitions. [2023-08-30 17:46:01,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 228 flow [2023-08-30 17:46:01,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:46:01,027 INFO L231 Difference]: Finished difference. Result has 41 places, 0 transitions, 0 flow [2023-08-30 17:46:01,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=41, PETRI_TRANSITIONS=0} [2023-08-30 17:46:01,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2023-08-30 17:46:01,028 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 0 transitions, 0 flow [2023-08-30 17:46:01,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 126.85714285714286) internal successors, (888), 7 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:01,029 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:46:01,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 17:46:01,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-30 17:46:01,234 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:46:01,235 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:46:01,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 151 transitions, 320 flow [2023-08-30 17:46:01,255 INFO L130 PetriNetUnfolder]: 40/259 cut-off events. [2023-08-30 17:46:01,255 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:46:01,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 40/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 723 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 165. Up to 9 conditions per place. [2023-08-30 17:46:01,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 151 transitions, 320 flow [2023-08-30 17:46:01,257 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 151 transitions, 320 flow [2023-08-30 17:46:01,258 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:46:01,258 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 151 transitions, 320 flow [2023-08-30 17:46:01,258 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 151 transitions, 320 flow [2023-08-30 17:46:01,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 151 transitions, 320 flow [2023-08-30 17:46:01,274 INFO L130 PetriNetUnfolder]: 40/259 cut-off events. [2023-08-30 17:46:01,274 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:46:01,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 40/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 723 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 165. Up to 9 conditions per place. [2023-08-30 17:46:01,279 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-30 17:46:03,808 INFO L134 LiptonReduction]: Checked pairs total: 17240 [2023-08-30 17:46:03,808 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-30 17:46:03,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:46:03,810 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;@587bb43d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:46:03,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:46:03,815 INFO L130 PetriNetUnfolder]: 13/60 cut-off events. [2023-08-30 17:46:03,815 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:46:03,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:03,815 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:46:03,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:46:03,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1024651417, now seen corresponding path program 1 times [2023-08-30 17:46:03,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:03,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165875675] [2023-08-30 17:46:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:46:03,834 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:46:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:46:03,847 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:46:03,847 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:46:03,847 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:46:03,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 17:46:03,848 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:46:03,849 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:46:03,849 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:46:03,849 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:46:03,869 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:46:03,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:03,905 INFO L130 PetriNetUnfolder]: 62/386 cut-off events. [2023-08-30 17:46:03,905 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:46:03,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 386 events. 62/386 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-08-30 17:46:03,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:03,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:03,910 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:46:03,910 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:03,911 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:03,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:03,942 INFO L130 PetriNetUnfolder]: 62/386 cut-off events. [2023-08-30 17:46:03,943 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:46:03,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 386 events. 62/386 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-08-30 17:46:03,954 INFO L119 LiptonReduction]: Number of co-enabled transitions 13944 [2023-08-30 17:46:06,602 INFO L134 LiptonReduction]: Checked pairs total: 33953 [2023-08-30 17:46:06,603 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-30 17:46:06,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:46:06,604 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;@587bb43d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:46:06,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:46:06,606 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 17:46:06,607 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:46:06,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:06,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:46:06,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:06,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:06,607 INFO L85 PathProgramCache]: Analyzing trace with hash 40938300, now seen corresponding path program 1 times [2023-08-30 17:46:06,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:06,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239030955] [2023-08-30 17:46:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:06,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:06,645 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 17:46:06,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:06,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239030955] [2023-08-30 17:46:06,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239030955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:46:06,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:46:06,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:46:06,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903538360] [2023-08-30 17:46:06,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:46:06,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:46:06,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:46:06,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:46:06,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 313 [2023-08-30 17:46:06,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:06,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:06,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 313 [2023-08-30 17:46:06,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:08,699 INFO L130 PetriNetUnfolder]: 16282/24958 cut-off events. [2023-08-30 17:46:08,700 INFO L131 PetriNetUnfolder]: For 709/709 co-relation queries the response was YES. [2023-08-30 17:46:08,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48518 conditions, 24958 events. 16282/24958 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 180180 event pairs, 13853 based on Foata normal form. 5644/27919 useless extension candidates. Maximal degree in co-relation 9279. Up to 22994 conditions per place. [2023-08-30 17:46:08,837 INFO L137 encePairwiseOnDemand]: 289/313 looper letters, 35 selfloop transitions, 2 changer transitions 13/64 dead transitions. [2023-08-30 17:46:08,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 254 flow [2023-08-30 17:46:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:46:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:46:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-30 17:46:08,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505857294994675 [2023-08-30 17:46:08,839 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-30 17:46:08,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-30 17:46:08,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:08,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-30 17:46:08,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:08,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:08,843 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:08,843 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 182 flow. Second operand 3 states and 517 transitions. [2023-08-30 17:46:08,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 254 flow [2023-08-30 17:46:08,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:46:08,849 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 113 flow [2023-08-30 17:46:08,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-30 17:46:08,850 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-30 17:46:08,850 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 113 flow [2023-08-30 17:46:08,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:08,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:08,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:46:08,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:46:08,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:08,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:08,851 INFO L85 PathProgramCache]: Analyzing trace with hash 706245034, now seen corresponding path program 1 times [2023-08-30 17:46:08,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:08,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825920646] [2023-08-30 17:46:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:08,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:46:08,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:08,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825920646] [2023-08-30 17:46:08,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825920646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:46:08,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:46:08,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:46:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628731149] [2023-08-30 17:46:08,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:46:08,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:46:08,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:46:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:46:08,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 313 [2023-08-30 17:46:08,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:08,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:08,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 313 [2023-08-30 17:46:08,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:10,260 INFO L130 PetriNetUnfolder]: 11746/17529 cut-off events. [2023-08-30 17:46:10,260 INFO L131 PetriNetUnfolder]: For 2127/2127 co-relation queries the response was YES. [2023-08-30 17:46:10,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36160 conditions, 17529 events. 11746/17529 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 110247 event pairs, 5236 based on Foata normal form. 39/17540 useless extension candidates. Maximal degree in co-relation 36088. Up to 16113 conditions per place. [2023-08-30 17:46:10,358 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 46 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-30 17:46:10,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 264 flow [2023-08-30 17:46:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:46:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:46:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-30 17:46:10,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122470713525027 [2023-08-30 17:46:10,361 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-30 17:46:10,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-30 17:46:10,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:10,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-30 17:46:10,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:10,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:10,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:10,365 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 113 flow. Second operand 3 states and 481 transitions. [2023-08-30 17:46:10,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 264 flow [2023-08-30 17:46:10,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 257 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 17:46:10,369 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 135 flow [2023-08-30 17:46:10,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-08-30 17:46:10,370 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-08-30 17:46:10,370 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 135 flow [2023-08-30 17:46:10,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:10,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:10,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:46:10,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:46:10,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:10,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1202037844, now seen corresponding path program 1 times [2023-08-30 17:46:10,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:10,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509683682] [2023-08-30 17:46:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:10,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:46:10,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:10,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509683682] [2023-08-30 17:46:10,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509683682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:46:10,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201066548] [2023-08-30 17:46:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:10,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:46:10,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:46:10,422 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 17:46:10,425 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 17:46:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:10,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:46:10,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:46:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:46:10,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:46:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:46:10,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201066548] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:46:10,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:46:10,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:46:10,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775199859] [2023-08-30 17:46:10,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:46:10,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:46:10,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:10,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:46:10,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:46:10,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 313 [2023-08-30 17:46:10,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 135 flow. Second operand has 7 states, 7 states have (on average 148.85714285714286) internal successors, (1042), 7 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:10,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:10,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 313 [2023-08-30 17:46:10,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:11,112 INFO L130 PetriNetUnfolder]: 3846/5928 cut-off events. [2023-08-30 17:46:11,112 INFO L131 PetriNetUnfolder]: For 1053/1053 co-relation queries the response was YES. [2023-08-30 17:46:11,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12691 conditions, 5928 events. 3846/5928 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 35376 event pairs, 525 based on Foata normal form. 619/6499 useless extension candidates. Maximal degree in co-relation 8103. Up to 3794 conditions per place. [2023-08-30 17:46:11,134 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 0 selfloop transitions, 0 changer transitions 90/90 dead transitions. [2023-08-30 17:46:11,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 377 flow [2023-08-30 17:46:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:46:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:46:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 950 transitions. [2023-08-30 17:46:11,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058572949946751 [2023-08-30 17:46:11,138 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 950 transitions. [2023-08-30 17:46:11,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 950 transitions. [2023-08-30 17:46:11,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:11,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 950 transitions. [2023-08-30 17:46:11,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:11,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:11,146 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:11,146 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 135 flow. Second operand 6 states and 950 transitions. [2023-08-30 17:46:11,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 377 flow [2023-08-30 17:46:11,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 371 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:46:11,149 INFO L231 Difference]: Finished difference. Result has 56 places, 0 transitions, 0 flow [2023-08-30 17:46:11,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=56, PETRI_TRANSITIONS=0} [2023-08-30 17:46:11,150 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2023-08-30 17:46:11,150 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 0 transitions, 0 flow [2023-08-30 17:46:11,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.85714285714286) internal successors, (1042), 7 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:11,151 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:46:11,158 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 17:46:11,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:46:11,357 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:46:11,357 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:46:11,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:11,429 INFO L130 PetriNetUnfolder]: 62/386 cut-off events. [2023-08-30 17:46:11,429 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:46:11,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 386 events. 62/386 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-08-30 17:46:11,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:11,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:11,433 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:46:11,433 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:11,434 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:11,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 181 transitions, 392 flow [2023-08-30 17:46:11,466 INFO L130 PetriNetUnfolder]: 62/386 cut-off events. [2023-08-30 17:46:11,467 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:46:11,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 386 events. 62/386 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-08-30 17:46:11,479 INFO L119 LiptonReduction]: Number of co-enabled transitions 13944 [2023-08-30 17:46:14,329 INFO L134 LiptonReduction]: Checked pairs total: 37857 [2023-08-30 17:46:14,329 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-30 17:46:14,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:46:14,331 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;@587bb43d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:46:14,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:46:14,339 INFO L130 PetriNetUnfolder]: 23/97 cut-off events. [2023-08-30 17:46:14,340 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:46:14,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:14,340 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:46:14,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:46:14,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash -749551721, now seen corresponding path program 1 times [2023-08-30 17:46:14,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:14,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395969584] [2023-08-30 17:46:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:14,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:46:14,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:46:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:46:14,363 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:46:14,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:46:14,364 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:46:14,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 17:46:14,364 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:46:14,365 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:46:14,365 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:46:14,365 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:46:14,382 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:46:14,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 211 transitions, 466 flow [2023-08-30 17:46:14,450 INFO L130 PetriNetUnfolder]: 96/577 cut-off events. [2023-08-30 17:46:14,451 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:46:14,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 577 events. 96/577 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2109 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 406. Up to 32 conditions per place. [2023-08-30 17:46:14,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 211 transitions, 466 flow [2023-08-30 17:46:14,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 211 transitions, 466 flow [2023-08-30 17:46:14,461 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:46:14,461 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 211 transitions, 466 flow [2023-08-30 17:46:14,461 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 211 transitions, 466 flow [2023-08-30 17:46:14,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 211 transitions, 466 flow [2023-08-30 17:46:14,525 INFO L130 PetriNetUnfolder]: 96/577 cut-off events. [2023-08-30 17:46:14,526 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:46:14,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 577 events. 96/577 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2109 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 406. Up to 32 conditions per place. [2023-08-30 17:46:14,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 22064 [2023-08-30 17:46:17,205 INFO L134 LiptonReduction]: Checked pairs total: 58636 [2023-08-30 17:46:17,205 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-30 17:46:17,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:46:17,206 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;@587bb43d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:46:17,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:46:17,208 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-30 17:46:17,208 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:46:17,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:17,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:46:17,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:17,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:17,209 INFO L85 PathProgramCache]: Analyzing trace with hash 56853106, now seen corresponding path program 1 times [2023-08-30 17:46:17,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:17,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453407300] [2023-08-30 17:46:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:17,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:17,235 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 17:46:17,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:17,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453407300] [2023-08-30 17:46:17,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453407300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:46:17,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:46:17,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:46:17,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120494957] [2023-08-30 17:46:17,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:46:17,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:46:17,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:46:17,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:46:17,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 355 [2023-08-30 17:46:17,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:17,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:17,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 355 [2023-08-30 17:46:17,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:46,189 INFO L130 PetriNetUnfolder]: 321014/444979 cut-off events. [2023-08-30 17:46:46,190 INFO L131 PetriNetUnfolder]: For 14774/14774 co-relation queries the response was YES. [2023-08-30 17:46:46,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870170 conditions, 444979 events. 321014/444979 cut-off events. For 14774/14774 co-relation queries the response was YES. Maximal size of possible extension queue 9900. Compared 3527783 event pairs, 231426 based on Foata normal form. 78568/483801 useless extension candidates. Maximal degree in co-relation 76389. Up to 416874 conditions per place. [2023-08-30 17:46:48,124 INFO L137 encePairwiseOnDemand]: 324/355 looper letters, 49 selfloop transitions, 2 changer transitions 15/80 dead transitions. [2023-08-30 17:46:48,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 332 flow [2023-08-30 17:46:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:46:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:46:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2023-08-30 17:46:48,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5690140845070423 [2023-08-30 17:46:48,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2023-08-30 17:46:48,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2023-08-30 17:46:48,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:48,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2023-08-30 17:46:48,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:48,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:48,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:48,131 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 238 flow. Second operand 3 states and 606 transitions. [2023-08-30 17:46:48,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 332 flow [2023-08-30 17:46:48,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:46:48,135 INFO L231 Difference]: Finished difference. Result has 77 places, 56 transitions, 146 flow [2023-08-30 17:46:48,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=77, PETRI_TRANSITIONS=56} [2023-08-30 17:46:48,137 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-08-30 17:46:48,137 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 56 transitions, 146 flow [2023-08-30 17:46:48,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:48,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:48,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:46:48,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 17:46:48,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:48,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1650482086, now seen corresponding path program 1 times [2023-08-30 17:46:48,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:48,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160150938] [2023-08-30 17:46:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:48,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:46:48,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:48,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160150938] [2023-08-30 17:46:48,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160150938] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:46:48,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:46:48,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:46:48,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576415274] [2023-08-30 17:46:48,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:46:48,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:46:48,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:46:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:46:48,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 355 [2023-08-30 17:46:48,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 56 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:46:48,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:48,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 355 [2023-08-30 17:46:48,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:59,053 INFO L130 PetriNetUnfolder]: 145558/197376 cut-off events. [2023-08-30 17:46:59,053 INFO L131 PetriNetUnfolder]: For 22476/22476 co-relation queries the response was YES. [2023-08-30 17:46:59,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405872 conditions, 197376 events. 145558/197376 cut-off events. For 22476/22476 co-relation queries the response was YES. Maximal size of possible extension queue 4570. Compared 1372613 event pairs, 72898 based on Foata normal form. 120/197434 useless extension candidates. Maximal degree in co-relation 405799. Up to 187779 conditions per place. [2023-08-30 17:47:00,336 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 58 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2023-08-30 17:47:00,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 76 transitions, 340 flow [2023-08-30 17:47:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:47:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:47:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-30 17:47:00,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201877934272301 [2023-08-30 17:47:00,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-30 17:47:00,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-30 17:47:00,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:47:00,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-30 17:47:00,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:00,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:00,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:00,344 INFO L175 Difference]: Start difference. First operand has 77 places, 56 transitions, 146 flow. Second operand 3 states and 554 transitions. [2023-08-30 17:47:00,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 76 transitions, 340 flow [2023-08-30 17:47:00,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 325 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 17:47:00,352 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 171 flow [2023-08-30 17:47:00,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2023-08-30 17:47:00,353 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2023-08-30 17:47:00,353 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 171 flow [2023-08-30 17:47:00,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:00,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:47:00,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:47:00,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 17:47:00,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:47:00,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:47:00,354 INFO L85 PathProgramCache]: Analyzing trace with hash 369761885, now seen corresponding path program 1 times [2023-08-30 17:47:00,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:47:00,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424785143] [2023-08-30 17:47:00,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:47:00,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:47:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:47:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:47:00,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:47:00,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424785143] [2023-08-30 17:47:00,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424785143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:47:00,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29812657] [2023-08-30 17:47:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:47:00,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:47:00,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:47:00,408 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 17:47:00,414 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 17:47:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:47:00,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:47:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:47:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:47:00,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:47:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:47:00,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29812657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:47:00,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:47:00,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:47:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592025128] [2023-08-30 17:47:00,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:47:00,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:47:00,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:47:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:47:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:47:00,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 355 [2023-08-30 17:47:00,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 171 flow. Second operand has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:00,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:47:00,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 355 [2023-08-30 17:47:00,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:47:09,733 INFO L130 PetriNetUnfolder]: 123388/164916 cut-off events. [2023-08-30 17:47:09,734 INFO L131 PetriNetUnfolder]: For 21309/21309 co-relation queries the response was YES. [2023-08-30 17:47:10,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363115 conditions, 164916 events. 123388/164916 cut-off events. For 21309/21309 co-relation queries the response was YES. Maximal size of possible extension queue 4067. Compared 1129460 event pairs, 8326 based on Foata normal form. 738/165652 useless extension candidates. Maximal degree in co-relation 281626. Up to 105544 conditions per place. [2023-08-30 17:47:10,580 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 133 selfloop transitions, 5 changer transitions 1/153 dead transitions. [2023-08-30 17:47:10,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 153 transitions, 687 flow [2023-08-30 17:47:10,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:47:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:47:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1137 transitions. [2023-08-30 17:47:10,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338028169014084 [2023-08-30 17:47:10,583 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1137 transitions. [2023-08-30 17:47:10,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1137 transitions. [2023-08-30 17:47:10,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:47:10,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1137 transitions. [2023-08-30 17:47:10,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 189.5) internal successors, (1137), 6 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:10,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:10,590 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:10,591 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 171 flow. Second operand 6 states and 1137 transitions. [2023-08-30 17:47:10,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 153 transitions, 687 flow [2023-08-30 17:47:10,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 153 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:47:10,595 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 200 flow [2023-08-30 17:47:10,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2023-08-30 17:47:10,596 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-08-30 17:47:10,596 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 200 flow [2023-08-30 17:47:10,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:10,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:47:10,597 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:47:10,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 17:47:10,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 17:47:10,802 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:47:10,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:47:10,802 INFO L85 PathProgramCache]: Analyzing trace with hash 25668583, now seen corresponding path program 1 times [2023-08-30 17:47:10,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:47:10,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603225944] [2023-08-30 17:47:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:47:10,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:47:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:47:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:47:10,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:47:10,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603225944] [2023-08-30 17:47:10,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603225944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:47:10,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144707161] [2023-08-30 17:47:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:47:10,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:47:10,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:47:10,894 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 17:47:11,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 17:47:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:47:11,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:47:11,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:47:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:47:11,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:47:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:47:11,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144707161] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:47:11,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:47:11,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 17:47:11,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982727539] [2023-08-30 17:47:11,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:47:11,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 17:47:11,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:47:11,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 17:47:11,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 17:47:11,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 355 [2023-08-30 17:47:11,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 200 flow. Second operand has 13 states, 13 states have (on average 171.15384615384616) internal successors, (2225), 13 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:11,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:47:11,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 355 [2023-08-30 17:47:11,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:47:14,829 INFO L130 PetriNetUnfolder]: 41092/57685 cut-off events. [2023-08-30 17:47:14,829 INFO L131 PetriNetUnfolder]: For 52156/52156 co-relation queries the response was YES. [2023-08-30 17:47:14,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141407 conditions, 57685 events. 41092/57685 cut-off events. For 52156/52156 co-relation queries the response was YES. Maximal size of possible extension queue 1546. Compared 384727 event pairs, 1620 based on Foata normal form. 5832/63516 useless extension candidates. Maximal degree in co-relation 18761. Up to 26487 conditions per place. [2023-08-30 17:47:15,030 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 0 selfloop transitions, 0 changer transitions 149/149 dead transitions. [2023-08-30 17:47:15,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 149 transitions, 678 flow [2023-08-30 17:47:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:47:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:47:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1299 transitions. [2023-08-30 17:47:15,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227364185110664 [2023-08-30 17:47:15,036 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1299 transitions. [2023-08-30 17:47:15,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1299 transitions. [2023-08-30 17:47:15,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:47:15,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1299 transitions. [2023-08-30 17:47:15,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.57142857142858) internal successors, (1299), 7 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:15,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:15,043 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:15,043 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 200 flow. Second operand 7 states and 1299 transitions. [2023-08-30 17:47:15,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 149 transitions, 678 flow [2023-08-30 17:47:15,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 149 transitions, 659 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 17:47:15,137 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-30 17:47:15,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-08-30 17:47:15,137 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-08-30 17:47:15,138 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-30 17:47:15,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.15384615384616) internal successors, (2225), 13 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:15,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:47:15,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 17:47:15,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 17:47:15,343 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 17:47:15,344 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:47:15,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 211 transitions, 466 flow [2023-08-30 17:47:15,380 INFO L130 PetriNetUnfolder]: 96/577 cut-off events. [2023-08-30 17:47:15,380 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:47:15,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 577 events. 96/577 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2109 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 406. Up to 32 conditions per place. [2023-08-30 17:47:15,384 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 211 transitions, 466 flow [2023-08-30 17:47:15,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 211 transitions, 466 flow [2023-08-30 17:47:15,385 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:47:15,385 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 211 transitions, 466 flow [2023-08-30 17:47:15,386 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 211 transitions, 466 flow [2023-08-30 17:47:15,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 211 transitions, 466 flow [2023-08-30 17:47:15,424 INFO L130 PetriNetUnfolder]: 96/577 cut-off events. [2023-08-30 17:47:15,424 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:47:15,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 577 events. 96/577 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2109 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 406. Up to 32 conditions per place. [2023-08-30 17:47:15,439 INFO L119 LiptonReduction]: Number of co-enabled transitions 22064 [2023-08-30 17:47:18,100 INFO L134 LiptonReduction]: Checked pairs total: 65202 [2023-08-30 17:47:18,101 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-30 17:47:18,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:47:18,102 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;@587bb43d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:47:18,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:47:18,111 INFO L130 PetriNetUnfolder]: 38/148 cut-off events. [2023-08-30 17:47:18,111 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 17:47:18,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:47:18,111 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 17:47:18,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:47:18,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:47:18,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1598658654, now seen corresponding path program 1 times [2023-08-30 17:47:18,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:47:18,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813998409] [2023-08-30 17:47:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:47:18,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:47:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:47:18,125 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:47:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:47:18,138 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:47:18,138 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:47:18,139 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:47:18,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 17:47:18,139 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:47:18,139 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:47:18,139 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:47:18,140 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 17:47:18,157 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 17:47:18,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 241 transitions, 542 flow [2023-08-30 17:47:18,255 INFO L130 PetriNetUnfolder]: 158/900 cut-off events. [2023-08-30 17:47:18,255 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:47:18,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 158/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3855 event pairs, 23 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 622. Up to 80 conditions per place. [2023-08-30 17:47:18,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 241 transitions, 542 flow [2023-08-30 17:47:18,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 241 transitions, 542 flow [2023-08-30 17:47:18,274 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:47:18,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 241 transitions, 542 flow [2023-08-30 17:47:18,274 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 241 transitions, 542 flow [2023-08-30 17:47:18,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 241 transitions, 542 flow [2023-08-30 17:47:18,342 INFO L130 PetriNetUnfolder]: 158/900 cut-off events. [2023-08-30 17:47:18,342 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:47:18,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 158/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3855 event pairs, 23 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 622. Up to 80 conditions per place. [2023-08-30 17:47:18,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 31920 [2023-08-30 17:47:21,141 INFO L134 LiptonReduction]: Checked pairs total: 89067 [2023-08-30 17:47:21,141 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-30 17:47:21,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:47:21,142 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;@587bb43d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:47:21,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:47:21,144 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-30 17:47:21,144 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:47:21,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:47:21,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:47:21,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:47:21,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:47:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash 74585676, now seen corresponding path program 1 times [2023-08-30 17:47:21,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:47:21,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875110270] [2023-08-30 17:47:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:47:21,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:47:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:47:21,187 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 17:47:21,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:47:21,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875110270] [2023-08-30 17:47:21,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875110270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:47:21,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:47:21,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:47:21,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101781004] [2023-08-30 17:47:21,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:47:21,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:47:21,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:47:21,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:47:21,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:47:21,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 402 [2023-08-30 17:47:21,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:47:21,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:47:21,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 402 [2023-08-30 17:47:21,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand