./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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_73-funloop_hard_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:22:26,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:22:26,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:22:26,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:22:26,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:22:26,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:22:26,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:22:26,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:22:26,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:22:26,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:22:26,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:22:26,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:22:26,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:22:26,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:22:26,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:22:26,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:22:26,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:22:26,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:22:26,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:22:26,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:22:26,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:22:26,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:22:26,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:22:26,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:22:26,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:22:26,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:22:26,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:22:26,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:22:26,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:22:26,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:22:26,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:22:26,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:22:26,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:22:26,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:22:26,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:22:26,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:22:26,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:22:26,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:22:26,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:22:26,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:22:26,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:22:26,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:22:26,944 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:22:26,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:22:26,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:22:26,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:22:26,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:22:26,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:22:26,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:22:26,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:22:26,947 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:22:26,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:22:26,947 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:22:26,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:22:26,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:22:26,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:22:26,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:22:26,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:22:26,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:22:26,948 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:22:26,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:22:26,949 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:22:26,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:22:26,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:22:26,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:22:26,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:22:26,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:22:26,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:22:26,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:22:26,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:22:26,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:22:26,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:22:26,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:22:26,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:22:26,952 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:22:26,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:22:26,952 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:22:26,952 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:22:27,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:22:27,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:22:27,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:22:27,324 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:22:27,324 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:22:27,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-31 00:22:28,480 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:22:28,833 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:22:28,833 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-31 00:22:28,851 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23afea03/677596f923d8479bbffc3b50e32871d8/FLAGd0f70122f [2023-08-31 00:22:28,870 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23afea03/677596f923d8479bbffc3b50e32871d8 [2023-08-31 00:22:28,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:22:28,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:22:28,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:22:28,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:22:28,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:22:28,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:22:28" (1/1) ... [2023-08-31 00:22:28,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ddeab28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:28, skipping insertion in model container [2023-08-31 00:22:28,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:22:28" (1/1) ... [2023-08-31 00:22:28,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:22:28,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:22:29,386 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_73-funloop_hard_racefree.i[41323,41336] [2023-08-31 00:22:29,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:22:29,444 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:22:29,490 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_73-funloop_hard_racefree.i[41323,41336] [2023-08-31 00:22:29,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:22:29,600 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:22:29,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29 WrapperNode [2023-08-31 00:22:29,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:22:29,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:22:29,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:22:29,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:22:29,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,676 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2023-08-31 00:22:29,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:22:29,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:22:29,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:22:29,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:22:29,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,735 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:22:29,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:22:29,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:22:29,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:22:29,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (1/1) ... [2023-08-31 00:22:29,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:22:29,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:29,782 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) [2023-08-31 00:22:29,809 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 [2023-08-31 00:22:29,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:22:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:22:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:22:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:22:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:22:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:22:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:22:29,824 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:22:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:22:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:22:29,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:22:29,827 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:22:29,992 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:22:29,994 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:22:30,289 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:22:30,296 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:22:30,299 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-31 00:22:30,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:22:30 BoogieIcfgContainer [2023-08-31 00:22:30,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:22:30,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:22:30,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:22:30,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:22:30,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:22:28" (1/3) ... [2023-08-31 00:22:30,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2896c2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:22:30, skipping insertion in model container [2023-08-31 00:22:30,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:22:29" (2/3) ... [2023-08-31 00:22:30,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2896c2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:22:30, skipping insertion in model container [2023-08-31 00:22:30,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:22:30" (3/3) ... [2023-08-31 00:22:30,307 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2023-08-31 00:22:30,314 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:22:30,322 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:22:30,322 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-31 00:22:30,322 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:22:30,399 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:22:30,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 246 transitions, 500 flow [2023-08-31 00:22:30,544 INFO L130 PetriNetUnfolder]: 73/381 cut-off events. [2023-08-31 00:22:30,544 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:22:30,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 381 events. 73/381 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1706 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-31 00:22:30,554 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 246 transitions, 500 flow [2023-08-31 00:22:30,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 241 transitions, 487 flow [2023-08-31 00:22:30,572 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:22:30,583 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 241 transitions, 487 flow [2023-08-31 00:22:30,585 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 241 transitions, 487 flow [2023-08-31 00:22:30,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 241 transitions, 487 flow [2023-08-31 00:22:30,648 INFO L130 PetriNetUnfolder]: 72/376 cut-off events. [2023-08-31 00:22:30,648 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:22:30,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 376 events. 72/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1659 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-31 00:22:30,658 INFO L119 LiptonReduction]: Number of co-enabled transitions 19458 [2023-08-31 00:22:33,256 INFO L134 LiptonReduction]: Checked pairs total: 28650 [2023-08-31 00:22:33,256 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-31 00:22:33,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:22:33,289 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;@782678dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:22:33,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 00:22:33,295 INFO L130 PetriNetUnfolder]: 9/35 cut-off events. [2023-08-31 00:22:33,295 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:22:33,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:33,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:33,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:22:33,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash -454048497, now seen corresponding path program 1 times [2023-08-31 00:22:33,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:33,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464326523] [2023-08-31 00:22:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:33,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:33,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:33,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464326523] [2023-08-31 00:22:33,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464326523] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:22:33,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:22:33,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:22:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844769070] [2023-08-31 00:22:33,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:22:33,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:22:33,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:33,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:22:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:22:33,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 430 [2023-08-31 00:22:33,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:33,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:33,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 430 [2023-08-31 00:22:33,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:33,872 INFO L130 PetriNetUnfolder]: 579/1212 cut-off events. [2023-08-31 00:22:33,872 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:22:33,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 1212 events. 579/1212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6864 event pairs, 465 based on Foata normal form. 213/1209 useless extension candidates. Maximal degree in co-relation 2191. Up to 1060 conditions per place. [2023-08-31 00:22:33,882 INFO L137 encePairwiseOnDemand]: 396/430 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-31 00:22:33,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 243 flow [2023-08-31 00:22:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:22:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:22:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-08-31 00:22:33,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286821705426357 [2023-08-31 00:22:33,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-08-31 00:22:33,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-08-31 00:22:33,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:33,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-08-31 00:22:33,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:33,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:33,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:33,922 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 682 transitions. [2023-08-31 00:22:33,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 243 flow [2023-08-31 00:22:33,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:22:33,929 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 147 flow [2023-08-31 00:22:33,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-08-31 00:22:33,934 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-31 00:22:33,935 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 147 flow [2023-08-31 00:22:33,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:33,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:33,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:33,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:22:33,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:22:33,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:33,938 INFO L85 PathProgramCache]: Analyzing trace with hash 584833530, now seen corresponding path program 1 times [2023-08-31 00:22:33,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:33,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17587251] [2023-08-31 00:22:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:33,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:22:34,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:34,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17587251] [2023-08-31 00:22:34,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17587251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:22:34,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464291550] [2023-08-31 00:22:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:34,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:34,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:34,057 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) [2023-08-31 00:22:34,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:22:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:22:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:22:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:22:34,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:22:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:22:34,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464291550] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:22:34,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:22:34,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:22:34,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358029464] [2023-08-31 00:22:34,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:22:34,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:22:34,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:22:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:22:34,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 430 [2023-08-31 00:22:34,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 147 flow. Second operand has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:34,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:34,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 430 [2023-08-31 00:22:34,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:34,438 INFO L130 PetriNetUnfolder]: 579/1215 cut-off events. [2023-08-31 00:22:34,439 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:22:34,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 1215 events. 579/1215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6863 event pairs, 465 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 2282. Up to 1060 conditions per place. [2023-08-31 00:22:34,445 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 51 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-31 00:22:34,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 271 flow [2023-08-31 00:22:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:22:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:22:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1247 transitions. [2023-08-31 00:22:34,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-08-31 00:22:34,449 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1247 transitions. [2023-08-31 00:22:34,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1247 transitions. [2023-08-31 00:22:34,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:34,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1247 transitions. [2023-08-31 00:22:34,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.83333333333334) internal successors, (1247), 6 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:34,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:34,458 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:34,458 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 147 flow. Second operand 6 states and 1247 transitions. [2023-08-31 00:22:34,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 271 flow [2023-08-31 00:22:34,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 267 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:22:34,460 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 179 flow [2023-08-31 00:22:34,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-08-31 00:22:34,461 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-31 00:22:34,461 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 179 flow [2023-08-31 00:22:34,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:34,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:34,463 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 00:22:34,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:22:34,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:34,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:22:34,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:34,670 INFO L85 PathProgramCache]: Analyzing trace with hash -451628733, now seen corresponding path program 2 times [2023-08-31 00:22:34,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:34,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117007945] [2023-08-31 00:22:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:34,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:22:34,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117007945] [2023-08-31 00:22:34,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117007945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:22:34,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954073488] [2023-08-31 00:22:34,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:22:34,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:34,825 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) [2023-08-31 00:22:34,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:22:34,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:22:34,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:22:34,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:22:34,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:22:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:22:34,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:22:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:22:35,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954073488] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:22:35,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:22:35,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 00:22:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842007227] [2023-08-31 00:22:35,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:22:35,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 00:22:35,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:35,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 00:22:35,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 00:22:35,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 430 [2023-08-31 00:22:35,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 179 flow. Second operand has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:35,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:35,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 430 [2023-08-31 00:22:35,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:35,259 INFO L130 PetriNetUnfolder]: 579/1221 cut-off events. [2023-08-31 00:22:35,259 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-31 00:22:35,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2331 conditions, 1221 events. 579/1221 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6856 event pairs, 465 based on Foata normal form. 6/1012 useless extension candidates. Maximal degree in co-relation 2273. Up to 1060 conditions per place. [2023-08-31 00:22:35,277 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 51 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-08-31 00:22:35,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 339 flow [2023-08-31 00:22:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 00:22:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 00:22:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2444 transitions. [2023-08-31 00:22:35,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47364341085271316 [2023-08-31 00:22:35,284 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2444 transitions. [2023-08-31 00:22:35,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2444 transitions. [2023-08-31 00:22:35,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:35,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2444 transitions. [2023-08-31 00:22:35,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 203.66666666666666) internal successors, (2444), 12 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:35,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:35,300 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:35,300 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 179 flow. Second operand 12 states and 2444 transitions. [2023-08-31 00:22:35,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 339 flow [2023-08-31 00:22:35,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 325 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:22:35,304 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 249 flow [2023-08-31 00:22:35,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=249, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2023-08-31 00:22:35,306 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-08-31 00:22:35,306 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 249 flow [2023-08-31 00:22:35,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:35,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:35,309 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 00:22:35,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 00:22:35,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-31 00:22:35,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:22:35,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:35,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1666983395, now seen corresponding path program 3 times [2023-08-31 00:22:35,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:35,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720621244] [2023-08-31 00:22:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:35,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:22:35,541 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:22:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:22:35,575 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:22:35,580 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:22:35,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-31 00:22:35,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-31 00:22:35,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-31 00:22:35,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-31 00:22:35,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-31 00:22:35,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 00:22:35,583 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 00:22:35,586 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:22:35,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:22:35,624 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:22:35,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-08-31 00:22:35,701 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-08-31 00:22:35,701 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:22:35,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-08-31 00:22:35,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 317 transitions, 652 flow [2023-08-31 00:22:35,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 317 transitions, 652 flow [2023-08-31 00:22:35,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:22:35,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 317 transitions, 652 flow [2023-08-31 00:22:35,713 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 317 transitions, 652 flow [2023-08-31 00:22:35,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-08-31 00:22:35,774 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-08-31 00:22:35,774 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:22:35,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-08-31 00:22:35,807 INFO L119 LiptonReduction]: Number of co-enabled transitions 49956 [2023-08-31 00:22:38,813 INFO L134 LiptonReduction]: Checked pairs total: 86365 [2023-08-31 00:22:38,813 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-08-31 00:22:38,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:22:38,816 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;@782678dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:22:38,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-31 00:22:38,819 INFO L130 PetriNetUnfolder]: 9/34 cut-off events. [2023-08-31 00:22:38,819 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:22:38,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:38,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:38,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:22:38,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1440537533, now seen corresponding path program 1 times [2023-08-31 00:22:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:38,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43963283] [2023-08-31 00:22:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:38,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:38,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43963283] [2023-08-31 00:22:38,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43963283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:22:38,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:22:38,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:22:38,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924842067] [2023-08-31 00:22:38,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:22:38,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:22:38,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:22:38,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:22:38,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 559 [2023-08-31 00:22:38,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 132 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:38,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:38,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 559 [2023-08-31 00:22:38,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:41,178 INFO L130 PetriNetUnfolder]: 19961/30642 cut-off events. [2023-08-31 00:22:41,178 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-08-31 00:22:41,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58969 conditions, 30642 events. 19961/30642 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 212680 event pairs, 17166 based on Foata normal form. 5462/30473 useless extension candidates. Maximal degree in co-relation 20159. Up to 28224 conditions per place. [2023-08-31 00:22:41,466 INFO L137 encePairwiseOnDemand]: 516/559 looper letters, 73 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-31 00:22:41,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-08-31 00:22:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:22:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:22:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2023-08-31 00:22:41,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253428741800835 [2023-08-31 00:22:41,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2023-08-31 00:22:41,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2023-08-31 00:22:41,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:41,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2023-08-31 00:22:41,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:41,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:41,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:41,476 INFO L175 Difference]: Start difference. First operand has 87 places, 132 transitions, 282 flow. Second operand 3 states and 881 transitions. [2023-08-31 00:22:41,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-08-31 00:22:41,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:22:41,482 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 214 flow [2023-08-31 00:22:41,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-08-31 00:22:41,484 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-31 00:22:41,485 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 214 flow [2023-08-31 00:22:41,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:41,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:41,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:41,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:22:41,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:22:41,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:41,492 INFO L85 PathProgramCache]: Analyzing trace with hash 38811947, now seen corresponding path program 1 times [2023-08-31 00:22:41,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:41,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968339656] [2023-08-31 00:22:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:41,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:41,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:41,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968339656] [2023-08-31 00:22:41,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968339656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:22:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831732740] [2023-08-31 00:22:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:41,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:41,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:41,549 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) [2023-08-31 00:22:41,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:22:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:41,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 00:22:41,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:22:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:22:41,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:22:41,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831732740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:22:41,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:22:41,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 00:22:41,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448481586] [2023-08-31 00:22:41,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:22:41,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:22:41,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:41,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:22:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:22:41,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 559 [2023-08-31 00:22:41,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:41,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:41,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 559 [2023-08-31 00:22:41,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:43,590 INFO L130 PetriNetUnfolder]: 19644/30266 cut-off events. [2023-08-31 00:22:43,590 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 00:22:43,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58589 conditions, 30266 events. 19644/30266 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 213381 event pairs, 8256 based on Foata normal form. 0/24593 useless extension candidates. Maximal degree in co-relation 58576. Up to 28177 conditions per place. [2023-08-31 00:22:43,754 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 91 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-31 00:22:43,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 436 flow [2023-08-31 00:22:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:22:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:22:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 858 transitions. [2023-08-31 00:22:43,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2023-08-31 00:22:43,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 858 transitions. [2023-08-31 00:22:43,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 858 transitions. [2023-08-31 00:22:43,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:43,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 858 transitions. [2023-08-31 00:22:43,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:43,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:43,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:43,764 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 214 flow. Second operand 3 states and 858 transitions. [2023-08-31 00:22:43,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 436 flow [2023-08-31 00:22:43,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:22:43,770 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 222 flow [2023-08-31 00:22:43,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-08-31 00:22:43,774 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-08-31 00:22:43,774 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 222 flow [2023-08-31 00:22:43,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:43,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:43,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:43,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 00:22:43,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:43,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:22:43,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:43,981 INFO L85 PathProgramCache]: Analyzing trace with hash 762694548, now seen corresponding path program 1 times [2023-08-31 00:22:43,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:43,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369172307] [2023-08-31 00:22:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:43,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:44,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:44,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369172307] [2023-08-31 00:22:44,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369172307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:22:44,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093116205] [2023-08-31 00:22:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:44,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:44,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:44,015 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) [2023-08-31 00:22:44,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 00:22:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:44,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:22:44,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:22:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:44,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:22:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093116205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:22:44,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:22:44,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:22:44,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63452015] [2023-08-31 00:22:44,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:22:44,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:22:44,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:22:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:22:44,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 559 [2023-08-31 00:22:44,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 256.14285714285717) internal successors, (1793), 7 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:44,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:44,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 559 [2023-08-31 00:22:44,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:45,742 INFO L130 PetriNetUnfolder]: 20049/30556 cut-off events. [2023-08-31 00:22:45,743 INFO L131 PetriNetUnfolder]: For 676/676 co-relation queries the response was YES. [2023-08-31 00:22:45,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59459 conditions, 30556 events. 20049/30556 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 209770 event pairs, 17166 based on Foata normal form. 3/25146 useless extension candidates. Maximal degree in co-relation 59431. Up to 28195 conditions per place. [2023-08-31 00:22:45,908 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-31 00:22:45,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 392 flow [2023-08-31 00:22:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:22:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:22:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1605 transitions. [2023-08-31 00:22:45,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785330948121646 [2023-08-31 00:22:45,914 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1605 transitions. [2023-08-31 00:22:45,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1605 transitions. [2023-08-31 00:22:45,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:45,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1605 transitions. [2023-08-31 00:22:45,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 267.5) internal successors, (1605), 6 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:45,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:45,925 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:45,925 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 222 flow. Second operand 6 states and 1605 transitions. [2023-08-31 00:22:45,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 392 flow [2023-08-31 00:22:45,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:22:45,930 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 256 flow [2023-08-31 00:22:45,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-08-31 00:22:45,932 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-08-31 00:22:45,932 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 256 flow [2023-08-31 00:22:45,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 256.14285714285717) internal successors, (1793), 7 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:45,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:45,933 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:45,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 00:22:46,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:46,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:22:46,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash 73730964, now seen corresponding path program 2 times [2023-08-31 00:22:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:46,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669278467] [2023-08-31 00:22:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:46,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:46,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:46,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669278467] [2023-08-31 00:22:46,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669278467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:22:46,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492165831] [2023-08-31 00:22:46,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:22:46,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:46,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:46,251 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) [2023-08-31 00:22:46,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 00:22:46,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 00:22:46,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:22:46,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:22:46,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:22:46,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-31 00:22:46,419 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:22:46,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-31 00:22:46,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:22:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:22:46,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:22:46,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492165831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:22:46,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:22:46,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-31 00:22:46,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257868653] [2023-08-31 00:22:46,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:22:46,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:22:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:22:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-31 00:22:46,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 559 [2023-08-31 00:22:46,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 243.66666666666666) internal successors, (1462), 6 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:46,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:46,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 559 [2023-08-31 00:22:46,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:49,124 INFO L130 PetriNetUnfolder]: 25470/39959 cut-off events. [2023-08-31 00:22:49,124 INFO L131 PetriNetUnfolder]: For 1007/1007 co-relation queries the response was YES. [2023-08-31 00:22:49,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78013 conditions, 39959 events. 25470/39959 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 299103 event pairs, 4099 based on Foata normal form. 0/32862 useless extension candidates. Maximal degree in co-relation 77977. Up to 27989 conditions per place. [2023-08-31 00:22:49,350 INFO L137 encePairwiseOnDemand]: 549/559 looper letters, 193 selfloop transitions, 16 changer transitions 0/227 dead transitions. [2023-08-31 00:22:49,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 227 transitions, 968 flow [2023-08-31 00:22:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:22:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:22:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1658 transitions. [2023-08-31 00:22:49,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433512224209897 [2023-08-31 00:22:49,362 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1658 transitions. [2023-08-31 00:22:49,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1658 transitions. [2023-08-31 00:22:49,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:49,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1658 transitions. [2023-08-31 00:22:49,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 276.3333333333333) internal successors, (1658), 6 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:49,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:49,377 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:49,377 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 256 flow. Second operand 6 states and 1658 transitions. [2023-08-31 00:22:49,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 227 transitions, 968 flow [2023-08-31 00:22:49,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 227 transitions, 954 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:22:49,385 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 345 flow [2023-08-31 00:22:49,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2023-08-31 00:22:49,387 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 20 predicate places. [2023-08-31 00:22:49,387 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 345 flow [2023-08-31 00:22:49,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 243.66666666666666) internal successors, (1462), 6 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:49,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:49,388 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:49,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 00:22:49,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:49,593 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:22:49,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1832831312, now seen corresponding path program 1 times [2023-08-31 00:22:49,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:49,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097427516] [2023-08-31 00:22:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:22:49,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:49,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097427516] [2023-08-31 00:22:49,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097427516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:22:49,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596272018] [2023-08-31 00:22:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:49,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:49,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:49,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:22:49,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 00:22:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:22:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:22:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:22:49,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:22:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:22:49,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596272018] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:22:49,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:22:49,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-31 00:22:49,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289065195] [2023-08-31 00:22:49,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:22:49,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 00:22:49,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 00:22:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-31 00:22:49,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 559 [2023-08-31 00:22:49,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 345 flow. Second operand has 14 states, 14 states have (on average 252.92857142857142) internal successors, (3541), 14 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:49,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:49,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 559 [2023-08-31 00:22:49,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:52,831 INFO L130 PetriNetUnfolder]: 25483/40304 cut-off events. [2023-08-31 00:22:52,831 INFO L131 PetriNetUnfolder]: For 8365/8367 co-relation queries the response was YES. [2023-08-31 00:22:52,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86542 conditions, 40304 events. 25483/40304 cut-off events. For 8365/8367 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 308071 event pairs, 621 based on Foata normal form. 32/35590 useless extension candidates. Maximal degree in co-relation 86483. Up to 36042 conditions per place. [2023-08-31 00:22:53,063 INFO L137 encePairwiseOnDemand]: 554/559 looper letters, 142 selfloop transitions, 14 changer transitions 0/174 dead transitions. [2023-08-31 00:22:53,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 849 flow [2023-08-31 00:22:53,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 00:22:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 00:22:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3657 transitions. [2023-08-31 00:22:53,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672885254280603 [2023-08-31 00:22:53,073 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3657 transitions. [2023-08-31 00:22:53,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3657 transitions. [2023-08-31 00:22:53,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:53,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3657 transitions. [2023-08-31 00:22:53,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 261.2142857142857) internal successors, (3657), 14 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:53,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 559.0) internal successors, (8385), 15 states have internal predecessors, (8385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:53,096 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 559.0) internal successors, (8385), 15 states have internal predecessors, (8385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:53,096 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 345 flow. Second operand 14 states and 3657 transitions. [2023-08-31 00:22:53,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 849 flow [2023-08-31 00:22:53,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 849 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:22:53,118 INFO L231 Difference]: Finished difference. Result has 121 places, 117 transitions, 415 flow [2023-08-31 00:22:53,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=415, PETRI_PLACES=121, PETRI_TRANSITIONS=117} [2023-08-31 00:22:53,118 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 34 predicate places. [2023-08-31 00:22:53,119 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 117 transitions, 415 flow [2023-08-31 00:22:53,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 252.92857142857142) internal successors, (3541), 14 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:53,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:53,120 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 00:22:53,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 00:22:53,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:53,325 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:22:53,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:53,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1872804745, now seen corresponding path program 1 times [2023-08-31 00:22:53,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:53,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030803648] [2023-08-31 00:22:53,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:53,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:22:53,358 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:22:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:22:53,388 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:22:53,389 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:22:53,389 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-31 00:22:53,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-31 00:22:53,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-31 00:22:53,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-31 00:22:53,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-31 00:22:53,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-31 00:22:53,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 00:22:53,390 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-08-31 00:22:53,391 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:22:53,391 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:22:53,419 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:22:53,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-08-31 00:22:53,510 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-08-31 00:22:53,510 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:22:53,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 872 events. 168/872 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4663 event pairs, 1 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-08-31 00:22:53,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 388 transitions, 806 flow [2023-08-31 00:22:53,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 388 transitions, 806 flow [2023-08-31 00:22:53,534 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:22:53,534 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 388 transitions, 806 flow [2023-08-31 00:22:53,534 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 388 transitions, 806 flow [2023-08-31 00:22:53,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-08-31 00:22:53,621 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-08-31 00:22:53,621 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:22:53,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 872 events. 168/872 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4663 event pairs, 1 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-08-31 00:22:53,673 INFO L119 LiptonReduction]: Number of co-enabled transitions 89838 [2023-08-31 00:22:57,167 INFO L134 LiptonReduction]: Checked pairs total: 142134 [2023-08-31 00:22:57,167 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-08-31 00:22:57,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:22:57,169 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;@782678dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:22:57,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-31 00:22:57,172 INFO L130 PetriNetUnfolder]: 12/38 cut-off events. [2023-08-31 00:22:57,172 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:22:57,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:57,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:57,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:22:57,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:57,173 INFO L85 PathProgramCache]: Analyzing trace with hash 100448795, now seen corresponding path program 1 times [2023-08-31 00:22:57,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:57,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351582808] [2023-08-31 00:22:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:57,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:57,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:57,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351582808] [2023-08-31 00:22:57,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351582808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:22:57,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:22:57,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:22:57,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071264489] [2023-08-31 00:22:57,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:22:57,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:22:57,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:57,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:22:57,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:22:57,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 682 [2023-08-31 00:22:57,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 165 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:57,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:57,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 682 [2023-08-31 00:22:57,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:23:35,309 INFO L130 PetriNetUnfolder]: 477490/661421 cut-off events. [2023-08-31 00:23:35,309 INFO L131 PetriNetUnfolder]: For 4158/4158 co-relation queries the response was YES. [2023-08-31 00:23:36,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274279 conditions, 661421 events. 477490/661421 cut-off events. For 4158/4158 co-relation queries the response was YES. Maximal size of possible extension queue 14829. Compared 5287189 event pairs, 422085 based on Foata normal form. 116547/658008 useless extension candidates. Maximal degree in co-relation 143396. Up to 610562 conditions per place. [2023-08-31 00:23:39,060 INFO L137 encePairwiseOnDemand]: 628/682 looper letters, 91 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2023-08-31 00:23:39,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 446 flow [2023-08-31 00:23:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:23:39,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:23:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1078 transitions. [2023-08-31 00:23:39,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2023-08-31 00:23:39,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1078 transitions. [2023-08-31 00:23:39,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1078 transitions. [2023-08-31 00:23:39,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:23:39,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1078 transitions. [2023-08-31 00:23:39,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:23:39,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:23:39,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:23:39,069 INFO L175 Difference]: Start difference. First operand has 108 places, 165 transitions, 360 flow. Second operand 3 states and 1078 transitions. [2023-08-31 00:23:39,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 446 flow [2023-08-31 00:23:39,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:23:39,073 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 270 flow [2023-08-31 00:23:39,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2023-08-31 00:23:39,074 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-08-31 00:23:39,074 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 270 flow [2023-08-31 00:23:39,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:23:39,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:23:39,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:23:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 00:23:39,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:23:39,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:23:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -673101525, now seen corresponding path program 1 times [2023-08-31 00:23:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:23:39,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698715671] [2023-08-31 00:23:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:23:39,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:23:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:23:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:23:39,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:23:39,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698715671] [2023-08-31 00:23:39,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698715671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:23:39,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771085803] [2023-08-31 00:23:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:23:39,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:23:39,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:23:39,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:23:39,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 00:23:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:23:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 00:23:39,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:23:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:23:39,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:23:39,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771085803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:23:39,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:23:39,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 00:23:39,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126684214] [2023-08-31 00:23:39,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:23:39,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:23:39,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:23:39,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:23:39,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:23:39,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 682 [2023-08-31 00:23:39,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:23:39,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:23:39,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 682 [2023-08-31 00:23:39,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:24:20,758 INFO L130 PetriNetUnfolder]: 485132/667396 cut-off events. [2023-08-31 00:24:20,758 INFO L131 PetriNetUnfolder]: For 3923/3923 co-relation queries the response was YES. [2023-08-31 00:24:22,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280211 conditions, 667396 events. 485132/667396 cut-off events. For 3923/3923 co-relation queries the response was YES. Maximal size of possible extension queue 14984. Compared 5254776 event pairs, 335220 based on Foata normal form. 0/546881 useless extension candidates. Maximal degree in co-relation 1280197. Up to 610515 conditions per place. [2023-08-31 00:24:24,290 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 109 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-08-31 00:24:24,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 528 flow [2023-08-31 00:24:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:24:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:24:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-08-31 00:24:24,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102639296187683 [2023-08-31 00:24:24,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-08-31 00:24:24,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-08-31 00:24:24,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:24:24,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-08-31 00:24:24,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:24:24,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:24:24,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:24:24,299 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 270 flow. Second operand 3 states and 1044 transitions. [2023-08-31 00:24:24,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 528 flow [2023-08-31 00:24:24,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 133 transitions, 524 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:24:24,304 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 278 flow [2023-08-31 00:24:24,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=113, PETRI_TRANSITIONS=116} [2023-08-31 00:24:24,305 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 5 predicate places. [2023-08-31 00:24:24,305 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 278 flow [2023-08-31 00:24:24,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:24:24,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:24:24,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:24:24,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 00:24:24,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:24:24,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:24:24,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:24:24,511 INFO L85 PathProgramCache]: Analyzing trace with hash -751777354, now seen corresponding path program 1 times [2023-08-31 00:24:24,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:24:24,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829486567] [2023-08-31 00:24:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:24:24,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:24:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:24:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:24:24,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:24:24,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829486567] [2023-08-31 00:24:24,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829486567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:24:24,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053218313] [2023-08-31 00:24:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:24:24,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:24:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:24:24,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:24:24,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 00:24:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:24:24,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:24:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:24:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:24:24,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:24:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:24:24,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053218313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:24:24,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:24:24,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:24:24,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014543485] [2023-08-31 00:24:24,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:24:24,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:24:24,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:24:24,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:24:24,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:24:24,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 682 [2023-08-31 00:24:24,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 312.14285714285717) internal successors, (2185), 7 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:24:24,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:24:24,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 682 [2023-08-31 00:24:24,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:25:05,883 INFO L130 PetriNetUnfolder]: 482742/664370 cut-off events. [2023-08-31 00:25:05,884 INFO L131 PetriNetUnfolder]: For 13090/13090 co-relation queries the response was YES. [2023-08-31 00:25:08,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1286508 conditions, 664370 events. 482742/664370 cut-off events. For 13090/13090 co-relation queries the response was YES. Maximal size of possible extension queue 14916. Compared 5235914 event pairs, 422085 based on Foata normal form. 3/548188 useless extension candidates. Maximal degree in co-relation 1286479. Up to 610533 conditions per place. [2023-08-31 00:25:11,149 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 92 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2023-08-31 00:25:11,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 484 flow [2023-08-31 00:25:11,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:25:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:25:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1959 transitions. [2023-08-31 00:25:11,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47873900293255134 [2023-08-31 00:25:11,154 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1959 transitions. [2023-08-31 00:25:11,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1959 transitions. [2023-08-31 00:25:11,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:25:11,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1959 transitions. [2023-08-31 00:25:11,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 326.5) internal successors, (1959), 6 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:25:11,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:25:11,162 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:25:11,163 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 278 flow. Second operand 6 states and 1959 transitions. [2023-08-31 00:25:11,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 484 flow [2023-08-31 00:25:11,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:25:11,176 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 312 flow [2023-08-31 00:25:11,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2023-08-31 00:25:11,177 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 12 predicate places. [2023-08-31 00:25:11,177 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 312 flow [2023-08-31 00:25:11,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 312.14285714285717) internal successors, (2185), 7 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:25:11,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:25:11,178 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:25:11,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 00:25:11,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 00:25:11,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:25:11,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:25:11,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1151730342, now seen corresponding path program 2 times [2023-08-31 00:25:11,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:25:11,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598681675] [2023-08-31 00:25:11,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:25:11,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:25:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:25:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:25:11,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:25:11,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598681675] [2023-08-31 00:25:11,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598681675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:25:11,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245974490] [2023-08-31 00:25:11,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:25:11,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:25:11,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:25:11,713 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:25:11,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 00:25:11,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 00:25:11,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:25:11,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:25:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:25:11,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-31 00:25:11,846 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:25:11,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-31 00:25:11,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:25:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:25:11,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:25:11,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245974490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:25:11,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:25:11,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-31 00:25:11,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710509591] [2023-08-31 00:25:11,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:25:11,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:25:11,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:25:11,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:25:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-31 00:25:12,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 682 [2023-08-31 00:25:12,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 297.6666666666667) internal successors, (1786), 6 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:25:12,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:25:12,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 682 [2023-08-31 00:25:12,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:26:05,677 INFO L130 PetriNetUnfolder]: 577157/806625 cut-off events. [2023-08-31 00:26:05,677 INFO L131 PetriNetUnfolder]: For 17538/17538 co-relation queries the response was YES. [2023-08-31 00:26:08,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1570038 conditions, 806625 events. 577157/806625 cut-off events. For 17538/17538 co-relation queries the response was YES. Maximal size of possible extension queue 18941. Compared 6768393 event pairs, 93910 based on Foata normal form. 0/665647 useless extension candidates. Maximal degree in co-relation 1570001. Up to 599551 conditions per place. [2023-08-31 00:26:11,011 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 263 selfloop transitions, 20 changer transitions 0/305 dead transitions. [2023-08-31 00:26:11,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 305 transitions, 1304 flow [2023-08-31 00:26:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:26:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:26:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2056 transitions. [2023-08-31 00:26:11,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024437927663734 [2023-08-31 00:26:11,015 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2056 transitions. [2023-08-31 00:26:11,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2056 transitions. [2023-08-31 00:26:11,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:26:11,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2056 transitions. [2023-08-31 00:26:11,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 342.6666666666667) internal successors, (2056), 6 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:11,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:11,024 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:11,024 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 312 flow. Second operand 6 states and 2056 transitions. [2023-08-31 00:26:11,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 305 transitions, 1304 flow [2023-08-31 00:26:11,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 305 transitions, 1290 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:26:11,043 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 423 flow [2023-08-31 00:26:11,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2023-08-31 00:26:11,044 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 20 predicate places. [2023-08-31 00:26:11,044 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 423 flow [2023-08-31 00:26:11,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 297.6666666666667) internal successors, (1786), 6 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:11,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:11,045 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:26:11,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-31 00:26:11,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 00:26:11,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:26:11,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:11,441 INFO L85 PathProgramCache]: Analyzing trace with hash 488814818, now seen corresponding path program 1 times [2023-08-31 00:26:11,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:11,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469772327] [2023-08-31 00:26:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:11,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:26:11,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:26:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469772327] [2023-08-31 00:26:11,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469772327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:26:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106271729] [2023-08-31 00:26:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:11,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:26:11,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:26:11,488 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:26:11,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 00:26:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:11,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:26:11,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:26:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:26:11,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:26:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:26:11,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106271729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:26:11,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:26:11,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-31 00:26:11,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337102678] [2023-08-31 00:26:11,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:26:11,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 00:26:11,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:26:11,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 00:26:11,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-31 00:26:11,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 682 [2023-08-31 00:26:11,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 423 flow. Second operand has 14 states, 14 states have (on average 308.92857142857144) internal successors, (4325), 14 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:11,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:26:11,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 682 [2023-08-31 00:26:11,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:27:15,162 INFO L130 PetriNetUnfolder]: 591054/815197 cut-off events. [2023-08-31 00:27:15,162 INFO L131 PetriNetUnfolder]: For 149423/149495 co-relation queries the response was YES. [2023-08-31 00:27:18,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728125 conditions, 815197 events. 591054/815197 cut-off events. For 149423/149495 co-relation queries the response was YES. Maximal size of possible extension queue 19064. Compared 6663139 event pairs, 163387 based on Foata normal form. 32/701836 useless extension candidates. Maximal degree in co-relation 1728065. Up to 766668 conditions per place. [2023-08-31 00:27:21,233 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 165 selfloop transitions, 14 changer transitions 0/201 dead transitions. [2023-08-31 00:27:21,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 201 transitions, 977 flow [2023-08-31 00:27:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 00:27:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 00:27:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4460 transitions. [2023-08-31 00:27:21,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671135316296607 [2023-08-31 00:27:21,240 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4460 transitions. [2023-08-31 00:27:21,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4460 transitions. [2023-08-31 00:27:21,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:27:21,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4460 transitions. [2023-08-31 00:27:21,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 318.57142857142856) internal successors, (4460), 14 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:27:21,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:27:21,256 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:27:21,257 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 423 flow. Second operand 14 states and 4460 transitions. [2023-08-31 00:27:21,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 201 transitions, 977 flow [2023-08-31 00:27:23,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 201 transitions, 977 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:27:23,671 INFO L231 Difference]: Finished difference. Result has 142 places, 144 transitions, 499 flow [2023-08-31 00:27:23,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=499, PETRI_PLACES=142, PETRI_TRANSITIONS=144} [2023-08-31 00:27:23,672 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 34 predicate places. [2023-08-31 00:27:23,672 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 144 transitions, 499 flow [2023-08-31 00:27:23,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 308.92857142857144) internal successors, (4325), 14 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:27:23,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:27:23,673 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:27:23,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 00:27:23,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 00:27:23,876 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:27:23,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:27:23,877 INFO L85 PathProgramCache]: Analyzing trace with hash -672124409, now seen corresponding path program 1 times [2023-08-31 00:27:23,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:27:23,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030730714] [2023-08-31 00:27:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:27:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-31 00:27:24,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:27:24,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030730714] [2023-08-31 00:27:24,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030730714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:27:24,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492174094] [2023-08-31 00:27:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:24,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:27:24,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:27:24,249 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:27:24,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 00:27:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:24,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 00:27:24,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:27:24,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-31 00:27:24,414 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:27:24,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-31 00:27:24,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:27:24,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:27:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-31 00:27:24,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:27:34,533 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_410 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_410) |c_~#cache~0.base|))) is different from false [2023-08-31 00:27:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-31 00:27:34,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492174094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:27:34,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:27:34,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-31 00:27:34,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782282702] [2023-08-31 00:27:34,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:27:34,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 00:27:34,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:27:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 00:27:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=4, NotChecked=18, Total=132 [2023-08-31 00:27:36,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:27:38,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:27:40,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:27:42,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:27:44,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:27:46,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:27:48,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:27:48,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 682 [2023-08-31 00:27:48,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 144 transitions, 499 flow. Second operand has 12 states, 12 states have (on average 261.9166666666667) internal successors, (3143), 12 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:27:48,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:27:48,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 682 [2023-08-31 00:27:48,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:29:11,482 INFO L130 PetriNetUnfolder]: 800226/1094875 cut-off events. [2023-08-31 00:29:11,482 INFO L131 PetriNetUnfolder]: For 220928/220946 co-relation queries the response was YES. [2023-08-31 00:29:16,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2341341 conditions, 1094875 events. 800226/1094875 cut-off events. For 220928/220946 co-relation queries the response was YES. Maximal size of possible extension queue 24430. Compared 8973965 event pairs, 121699 based on Foata normal form. 12/951571 useless extension candidates. Maximal degree in co-relation 2341267. Up to 711006 conditions per place. [2023-08-31 00:29:20,407 INFO L137 encePairwiseOnDemand]: 666/682 looper letters, 343 selfloop transitions, 43 changer transitions 0/405 dead transitions. [2023-08-31 00:29:20,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 405 transitions, 1974 flow [2023-08-31 00:29:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 00:29:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 00:29:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2169 transitions. [2023-08-31 00:29:20,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543359865940511 [2023-08-31 00:29:20,412 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2169 transitions. [2023-08-31 00:29:20,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2169 transitions. [2023-08-31 00:29:20,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:29:20,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2169 transitions. [2023-08-31 00:29:20,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 309.85714285714283) internal successors, (2169), 7 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:20,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 682.0) internal successors, (5456), 8 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:20,421 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 682.0) internal successors, (5456), 8 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:20,421 INFO L175 Difference]: Start difference. First operand has 142 places, 144 transitions, 499 flow. Second operand 7 states and 2169 transitions. [2023-08-31 00:29:20,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 405 transitions, 1974 flow [2023-08-31 00:29:25,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 405 transitions, 1897 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-08-31 00:29:25,648 INFO L231 Difference]: Finished difference. Result has 144 places, 169 transitions, 727 flow [2023-08-31 00:29:25,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=727, PETRI_PLACES=144, PETRI_TRANSITIONS=169} [2023-08-31 00:29:25,648 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 36 predicate places. [2023-08-31 00:29:25,649 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 169 transitions, 727 flow [2023-08-31 00:29:25,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 261.9166666666667) internal successors, (3143), 12 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:25,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:29:25,649 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:29:25,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 00:29:25,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 00:29:25,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:29:25,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:29:25,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1395362984, now seen corresponding path program 1 times [2023-08-31 00:29:25,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:29:25,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953204317] [2023-08-31 00:29:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:25,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:29:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:29:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 00:29:25,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:29:25,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953204317] [2023-08-31 00:29:25,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953204317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:29:25,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393760244] [2023-08-31 00:29:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:25,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:29:25,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:29:25,907 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:29:25,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 00:29:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:29:26,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 00:29:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:29:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 00:29:26,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:29:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 00:29:26,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393760244] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:29:26,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:29:26,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-31 00:29:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494791167] [2023-08-31 00:29:26,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:29:26,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 00:29:26,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:29:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 00:29:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-31 00:29:26,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 682 [2023-08-31 00:29:26,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 169 transitions, 727 flow. Second operand has 9 states, 9 states have (on average 312.8888888888889) internal successors, (2816), 9 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:26,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:29:26,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 682 [2023-08-31 00:29:26,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:29:32,382 INFO L130 PetriNetUnfolder]: 62805/93179 cut-off events. [2023-08-31 00:29:32,382 INFO L131 PetriNetUnfolder]: For 81841/81843 co-relation queries the response was YES. [2023-08-31 00:29:32,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251150 conditions, 93179 events. 62805/93179 cut-off events. For 81841/81843 co-relation queries the response was YES. Maximal size of possible extension queue 2476. Compared 710434 event pairs, 1386 based on Foata normal form. 7580/93552 useless extension candidates. Maximal degree in co-relation 241125. Up to 58758 conditions per place. [2023-08-31 00:29:33,234 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 212 selfloop transitions, 4 changer transitions 0/229 dead transitions. [2023-08-31 00:29:33,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 229 transitions, 1319 flow [2023-08-31 00:29:33,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:29:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:29:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2022 transitions. [2023-08-31 00:29:33,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941348973607038 [2023-08-31 00:29:33,237 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2022 transitions. [2023-08-31 00:29:33,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2022 transitions. [2023-08-31 00:29:33,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:29:33,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2022 transitions. [2023-08-31 00:29:33,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:33,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:33,246 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:33,246 INFO L175 Difference]: Start difference. First operand has 144 places, 169 transitions, 727 flow. Second operand 6 states and 2022 transitions. [2023-08-31 00:29:33,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 229 transitions, 1319 flow [2023-08-31 00:29:33,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 229 transitions, 1267 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-31 00:29:33,401 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 366 flow [2023-08-31 00:29:33,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2023-08-31 00:29:33,401 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -5 predicate places. [2023-08-31 00:29:33,401 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 366 flow [2023-08-31 00:29:33,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 312.8888888888889) internal successors, (2816), 9 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:33,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:29:33,402 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 00:29:33,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 00:29:33,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 00:29:33,603 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:29:33,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:29:33,604 INFO L85 PathProgramCache]: Analyzing trace with hash 562120399, now seen corresponding path program 1 times [2023-08-31 00:29:33,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:29:33,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276013775] [2023-08-31 00:29:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:33,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:29:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:29:33,633 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:29:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:29:33,667 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:29:33,667 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:29:33,667 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-31 00:29:33,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-31 00:29:33,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-31 00:29:33,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-31 00:29:33,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-31 00:29:33,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-31 00:29:33,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-31 00:29:33,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 00:29:33,669 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-31 00:29:33,669 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:29:33,669 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:29:33,708 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:29:33,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 459 transitions, 962 flow [2023-08-31 00:29:33,852 INFO L130 PetriNetUnfolder]: 230/1197 cut-off events. [2023-08-31 00:29:33,852 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:29:33,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 1197 events. 230/1197 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6699 event pairs, 6 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 892. Up to 32 conditions per place. [2023-08-31 00:29:33,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 378 places, 459 transitions, 962 flow [2023-08-31 00:29:33,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 378 places, 459 transitions, 962 flow [2023-08-31 00:29:33,884 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:29:33,884 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 378 places, 459 transitions, 962 flow [2023-08-31 00:29:33,884 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 378 places, 459 transitions, 962 flow [2023-08-31 00:29:33,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 459 transitions, 962 flow [2023-08-31 00:29:33,992 INFO L130 PetriNetUnfolder]: 230/1197 cut-off events. [2023-08-31 00:29:33,992 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:29:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 1197 events. 230/1197 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6699 event pairs, 6 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 892. Up to 32 conditions per place. [2023-08-31 00:29:34,074 INFO L119 LiptonReduction]: Number of co-enabled transitions 139656 [2023-08-31 00:29:37,471 INFO L134 LiptonReduction]: Checked pairs total: 247744 [2023-08-31 00:29:37,471 INFO L136 LiptonReduction]: Total number of compositions: 348 [2023-08-31 00:29:37,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:29:37,473 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;@782678dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:29:37,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-31 00:29:37,475 INFO L130 PetriNetUnfolder]: 12/40 cut-off events. [2023-08-31 00:29:37,475 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:29:37,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:29:37,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:29:37,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-31 00:29:37,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:29:37,475 INFO L85 PathProgramCache]: Analyzing trace with hash 230351614, now seen corresponding path program 1 times [2023-08-31 00:29:37,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:29:37,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824230776] [2023-08-31 00:29:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:37,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:29:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:29:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:29:37,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:29:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824230776] [2023-08-31 00:29:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824230776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:29:37,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:29:37,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:29:37,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840802500] [2023-08-31 00:29:37,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:29:37,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:29:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:29:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:29:37,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:29:37,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 807 [2023-08-31 00:29:37,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 198 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:29:37,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:29:37,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 807 [2023-08-31 00:29:37,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand