./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.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_77-tricky_address4_racing.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 dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --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 00:26:48,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:26:48,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:26:48,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:26:48,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:26:48,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:26:48,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:26:48,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:26:48,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:26:48,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:26:48,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:26:48,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:26:48,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:26:48,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:26:48,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:26:48,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:26:48,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:26:48,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:26:48,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:26:48,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:26:48,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:26:48,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:26:48,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:26:48,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:26:48,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:26:48,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:26:48,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:26:48,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:26:48,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:26:48,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:26:48,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:26:48,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:26:48,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:26:48,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:26:48,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:26:48,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:26:48,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:26:48,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:26:48,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:26:48,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:26:48,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:26:48,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:26:48,869 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:26:48,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:26:48,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:26:48,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:26:48,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:26:48,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:26:48,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:26:48,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:26:48,871 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:26:48,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:26:48,872 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:26:48,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:26:48,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:26:48,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:26:48,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:26:48,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:26:48,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:26:48,873 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:26:48,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:26:48,873 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:26:48,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:26:48,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:26:48,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:26:48,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:26:48,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:26:48,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:26:48,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:26:48,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:26:48,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:26:48,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:26:48,875 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:26:48,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:26:48,875 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:26:48,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:26:48,876 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:26:48,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:26:49,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:26:49,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:26:49,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:26:49,094 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:26:49,095 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:26:49,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-31 00:26:49,965 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:26:50,163 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:26:50,163 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-31 00:26:50,174 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fef679630/156d2e14ceaf4d89914e9575c38ff6a6/FLAG16d79e8f3 [2023-08-31 00:26:50,183 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fef679630/156d2e14ceaf4d89914e9575c38ff6a6 [2023-08-31 00:26:50,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:26:50,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:26:50,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:26:50,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:26:50,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:26:50,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@126f36e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50, skipping insertion in model container [2023-08-31 00:26:50,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:26:50,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:26:50,526 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_77-tricky_address4_racing.i[41323,41336] [2023-08-31 00:26:50,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:26:50,572 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:26:50,604 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_77-tricky_address4_racing.i[41323,41336] [2023-08-31 00:26:50,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:26:50,693 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:26:50,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50 WrapperNode [2023-08-31 00:26:50,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:26:50,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:26:50,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:26:50,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:26:50,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,751 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-08-31 00:26:50,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:26:50,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:26:50,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:26:50,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:26:50,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,793 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:26:50,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:26:50,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:26:50,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:26:50,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (1/1) ... [2023-08-31 00:26:50,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:26:50,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:26:50,827 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 00:26:50,839 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 00:26:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:26:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:26:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:26:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:26:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:26:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:26:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:26:50,859 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:26:50,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:26:50,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:26:50,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:26:50,860 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 00:26:50,964 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:26:50,965 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:26:51,181 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:26:51,186 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:26:51,186 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-31 00:26:51,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:26:51 BoogieIcfgContainer [2023-08-31 00:26:51,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:26:51,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:26:51,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:26:51,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:26:51,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:26:50" (1/3) ... [2023-08-31 00:26:51,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3969e290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:26:51, skipping insertion in model container [2023-08-31 00:26:51,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:26:50" (2/3) ... [2023-08-31 00:26:51,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3969e290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:26:51, skipping insertion in model container [2023-08-31 00:26:51,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:26:51" (3/3) ... [2023-08-31 00:26:51,193 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-08-31 00:26:51,197 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:26:51,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:26:51,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-31 00:26:51,203 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:26:51,267 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:26:51,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-08-31 00:26:51,346 INFO L130 PetriNetUnfolder]: 45/263 cut-off events. [2023-08-31 00:26:51,346 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-31 00:26:51,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 263 events. 45/263 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 814 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-08-31 00:26:51,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-08-31 00:26:51,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-08-31 00:26:51,358 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:26:51,363 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-08-31 00:26:51,365 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-08-31 00:26:51,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-08-31 00:26:51,397 INFO L130 PetriNetUnfolder]: 44/258 cut-off events. [2023-08-31 00:26:51,397 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:26:51,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 258 events. 44/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 778 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-08-31 00:26:51,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 10792 [2023-08-31 00:26:53,499 INFO L134 LiptonReduction]: Checked pairs total: 17790 [2023-08-31 00:26:53,499 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-31 00:26:53,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:26:53,523 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;@73fc1fed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:26:53,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 00:26:53,528 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-08-31 00:26:53,528 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:26:53,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:53,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 00:26:53,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:26:53,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1355205613, now seen corresponding path program 1 times [2023-08-31 00:26:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:53,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374949481] [2023-08-31 00:26:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:53,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:53,672 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 00:26:53,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:26:53,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374949481] [2023-08-31 00:26:53,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374949481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:26:53,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:26:53,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:26:53,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673788898] [2023-08-31 00:26:53,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:26:53,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:26:53,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:26:53,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:26:53,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:26:53,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 357 [2023-08-31 00:26:53,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 00:26:53,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:26:53,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 357 [2023-08-31 00:26:53,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:26:53,826 INFO L130 PetriNetUnfolder]: 272/614 cut-off events. [2023-08-31 00:26:53,826 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:26:53,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 614 events. 272/614 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3057 event pairs, 238 based on Foata normal form. 118/640 useless extension candidates. Maximal degree in co-relation 1094. Up to 528 conditions per place. [2023-08-31 00:26:53,833 INFO L137 encePairwiseOnDemand]: 332/357 looper letters, 34 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-31 00:26:53,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-08-31 00:26:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:26:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:26:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-31 00:26:53,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976657329598506 [2023-08-31 00:26:53,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-31 00:26:53,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-31 00:26:53,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:26:53,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-31 00:26:53,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 00:26:53,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:53,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:53,853 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 533 transitions. [2023-08-31 00:26:53,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-08-31 00:26:53,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:26:53,857 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 105 flow [2023-08-31 00:26:53,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-31 00:26:53,860 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-31 00:26:53,860 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 105 flow [2023-08-31 00:26:53,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 00:26:53,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:53,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:26:53,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:26:53,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:26:53,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1202044733, now seen corresponding path program 1 times [2023-08-31 00:26:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:53,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580518277] [2023-08-31 00:26:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:53,926 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 00:26:53,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:26:53,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580518277] [2023-08-31 00:26:53,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580518277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:26:53,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776562696] [2023-08-31 00:26:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:53,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:26:53,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:26:53,929 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 00:26:53,968 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 00:26:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:54,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 00:26:54,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:26:54,031 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 00:26:54,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:26:54,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776562696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:26:54,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:26:54,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 00:26:54,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316428867] [2023-08-31 00:26:54,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:26:54,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:26:54,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:26:54,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:26:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:26:54,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 357 [2023-08-31 00:26:54,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:54,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:26:54,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 357 [2023-08-31 00:26:54,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:26:54,149 INFO L130 PetriNetUnfolder]: 255/592 cut-off events. [2023-08-31 00:26:54,149 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:26:54,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 592 events. 255/592 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3266 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 1120. Up to 497 conditions per place. [2023-08-31 00:26:54,152 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 49 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-31 00:26:54,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 237 flow [2023-08-31 00:26:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:26:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:26:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-08-31 00:26:54,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2023-08-31 00:26:54,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-08-31 00:26:54,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-08-31 00:26:54,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:26:54,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-08-31 00:26:54,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 00:26:54,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:54,164 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:54,164 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 105 flow. Second operand 3 states and 525 transitions. [2023-08-31 00:26:54,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 237 flow [2023-08-31 00:26:54,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 233 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:26:54,167 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 109 flow [2023-08-31 00:26:54,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-31 00:26:54,167 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-08-31 00:26:54,167 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 109 flow [2023-08-31 00:26:54,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:54,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:54,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 00:26:54,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 00:26:54,372 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 00:26:54,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:26:54,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1382333179, now seen corresponding path program 1 times [2023-08-31 00:26:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:54,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521997897] [2023-08-31 00:26:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:54,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:54,432 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 00:26:54,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:26:54,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521997897] [2023-08-31 00:26:54,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521997897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:26:54,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694909146] [2023-08-31 00:26:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:54,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:26:54,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:26:54,435 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 00:26:54,438 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 00:26:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:54,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:26:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:26:54,520 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 00:26:54,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:26:54,538 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 00:26:54,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694909146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:26:54,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:26:54,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:26:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827005772] [2023-08-31 00:26:54,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:26:54,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:26:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:26:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:26:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:26:54,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 357 [2023-08-31 00:26:54,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 109 flow. Second operand has 7 states, 7 states have (on average 158.57142857142858) internal successors, (1110), 7 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 00:26:54,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:26:54,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 357 [2023-08-31 00:26:54,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:26:54,659 INFO L130 PetriNetUnfolder]: 271/599 cut-off events. [2023-08-31 00:26:54,659 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-08-31 00:26:54,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 599 events. 271/599 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2938 event pairs, 238 based on Foata normal form. 3/529 useless extension candidates. Maximal degree in co-relation 1149. Up to 513 conditions per place. [2023-08-31 00:26:54,661 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 34 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-08-31 00:26:54,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 199 flow [2023-08-31 00:26:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:26:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:26:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 984 transitions. [2023-08-31 00:26:54,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45938375350140054 [2023-08-31 00:26:54,663 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 984 transitions. [2023-08-31 00:26:54,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 984 transitions. [2023-08-31 00:26:54,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:26:54,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 984 transitions. [2023-08-31 00:26:54,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 00:26:54,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states 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 00:26:54,669 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states 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 00:26:54,669 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 109 flow. Second operand 6 states and 984 transitions. [2023-08-31 00:26:54,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 199 flow [2023-08-31 00:26:54,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 00:26:54,671 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 141 flow [2023-08-31 00:26:54,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-31 00:26:54,672 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-08-31 00:26:54,672 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 141 flow [2023-08-31 00:26:54,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.57142857142858) internal successors, (1110), 7 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 00:26:54,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:54,673 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 00:26:54,691 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 00:26:54,881 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 00:26:54,881 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:26:54,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:54,882 INFO L85 PathProgramCache]: Analyzing trace with hash 941146001, now seen corresponding path program 2 times [2023-08-31 00:26:54,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:54,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655554680] [2023-08-31 00:26:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:54,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:54,943 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 00:26:54,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:26:54,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655554680] [2023-08-31 00:26:54,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655554680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:26:54,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894181232] [2023-08-31 00:26:54,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:26:54,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:26:54,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:26:54,949 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 00:26:54,951 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 00:26:55,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:26:55,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:26:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:26:55,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:26:55,028 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 00:26:55,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:26:55,078 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 00:26:55,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894181232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:26:55,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:26:55,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 00:26:55,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813588191] [2023-08-31 00:26:55,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:26:55,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 00:26:55,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:26:55,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 00:26:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 00:26:55,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 357 [2023-08-31 00:26:55,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 141 flow. Second operand has 13 states, 13 states have (on average 158.30769230769232) internal successors, (2058), 13 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states 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 00:26:55,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:26:55,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 357 [2023-08-31 00:26:55,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:26:55,224 INFO L130 PetriNetUnfolder]: 270/602 cut-off events. [2023-08-31 00:26:55,224 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-31 00:26:55,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 602 events. 270/602 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2934 event pairs, 238 based on Foata normal form. 6/536 useless extension candidates. Maximal degree in co-relation 1138. Up to 513 conditions per place. [2023-08-31 00:26:55,226 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 34 selfloop transitions, 11 changer transitions 0/54 dead transitions. [2023-08-31 00:26:55,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 267 flow [2023-08-31 00:26:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 00:26:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 00:26:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1935 transitions. [2023-08-31 00:26:55,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45168067226890757 [2023-08-31 00:26:55,230 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1935 transitions. [2023-08-31 00:26:55,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1935 transitions. [2023-08-31 00:26:55,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:26:55,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1935 transitions. [2023-08-31 00:26:55,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 161.25) internal successors, (1935), 12 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states 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 00:26:55,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 357.0) internal successors, (4641), 13 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states 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 00:26:55,240 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 357.0) internal successors, (4641), 13 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states 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 00:26:55,240 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 141 flow. Second operand 12 states and 1935 transitions. [2023-08-31 00:26:55,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 267 flow [2023-08-31 00:26:55,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 253 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:26:55,243 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 211 flow [2023-08-31 00:26:55,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=211, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-08-31 00:26:55,244 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2023-08-31 00:26:55,244 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 211 flow [2023-08-31 00:26:55,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 158.30769230769232) internal successors, (2058), 13 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states 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 00:26:55,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:55,245 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 00:26:55,253 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 00:26:55,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:26:55,452 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:26:55,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1854023505, now seen corresponding path program 3 times [2023-08-31 00:26:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:55,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747038188] [2023-08-31 00:26:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:55,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:26:55,488 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:26:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:26:55,528 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:26:55,528 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:26:55,529 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-31 00:26:55,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-31 00:26:55,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-31 00:26:55,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-31 00:26:55,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:26:55,531 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-31 00:26:55,538 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:26:55,538 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:26:55,571 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:26:55,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-08-31 00:26:55,607 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-08-31 00:26:55,607 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-31 00:26:55,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-08-31 00:26:55,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 266 transitions, 550 flow [2023-08-31 00:26:55,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 266 transitions, 550 flow [2023-08-31 00:26:55,613 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:26:55,613 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 266 transitions, 550 flow [2023-08-31 00:26:55,613 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 266 transitions, 550 flow [2023-08-31 00:26:55,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-08-31 00:26:55,642 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-08-31 00:26:55,642 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-31 00:26:55,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-08-31 00:26:55,664 INFO L119 LiptonReduction]: Number of co-enabled transitions 33228 [2023-08-31 00:26:58,103 INFO L134 LiptonReduction]: Checked pairs total: 56804 [2023-08-31 00:26:58,103 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-31 00:26:58,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:26:58,105 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;@73fc1fed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:26:58,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 00:26:58,107 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-08-31 00:26:58,107 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:26:58,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:58,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 00:26:58,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:26:58,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:58,107 INFO L85 PathProgramCache]: Analyzing trace with hash 685324257, now seen corresponding path program 1 times [2023-08-31 00:26:58,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:58,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032043679] [2023-08-31 00:26:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:58,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:58,123 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 00:26:58,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:26:58,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032043679] [2023-08-31 00:26:58,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032043679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:26:58,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:26:58,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:26:58,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976194849] [2023-08-31 00:26:58,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:26:58,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:26:58,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:26:58,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:26:58,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:26:58,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-31 00:26:58,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:58,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:26:58,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-31 00:26:58,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:26:59,051 INFO L130 PetriNetUnfolder]: 10559/16533 cut-off events. [2023-08-31 00:26:59,052 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 00:26:59,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32068 conditions, 16533 events. 10559/16533 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 109159 event pairs, 9818 based on Foata normal form. 2499/16469 useless extension candidates. Maximal degree in co-relation 13984. Up to 15431 conditions per place. [2023-08-31 00:26:59,106 INFO L137 encePairwiseOnDemand]: 450/485 looper letters, 56 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-31 00:26:59,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-08-31 00:26:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:26:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:26:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2023-08-31 00:26:59,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079037800687285 [2023-08-31 00:26:59,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2023-08-31 00:26:59,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2023-08-31 00:26:59,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:26:59,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2023-08-31 00:26:59,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 00:26:59,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 00:26:59,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 00:26:59,115 INFO L175 Difference]: Start difference. First operand has 68 places, 101 transitions, 220 flow. Second operand 3 states and 739 transitions. [2023-08-31 00:26:59,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-08-31 00:26:59,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:26:59,117 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2023-08-31 00:26:59,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-08-31 00:26:59,120 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-31 00:26:59,120 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2023-08-31 00:26:59,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:59,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:59,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:26:59,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 00:26:59,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:26:59,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash -909660943, now seen corresponding path program 1 times [2023-08-31 00:26:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:59,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085988474] [2023-08-31 00:26:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:59,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:59,166 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 00:26:59,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:26:59,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085988474] [2023-08-31 00:26:59,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085988474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:26:59,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224269844] [2023-08-31 00:26:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:59,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:26:59,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:26:59,169 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 00:26:59,171 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 00:26:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:59,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 00:26:59,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:26:59,224 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 00:26:59,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:26:59,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224269844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:26:59,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:26:59,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 00:26:59,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975102666] [2023-08-31 00:26:59,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:26:59,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:26:59,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:26:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:26:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:26:59,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-31 00:26:59,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states 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 00:26:59,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:26:59,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-31 00:26:59,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:27:00,050 INFO L130 PetriNetUnfolder]: 10416/16508 cut-off events. [2023-08-31 00:27:00,051 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2023-08-31 00:27:00,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32058 conditions, 16508 events. 10416/16508 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 111734 event pairs, 4650 based on Foata normal form. 0/13980 useless extension candidates. Maximal degree in co-relation 32045. Up to 15399 conditions per place. [2023-08-31 00:27:00,111 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-31 00:27:00,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 356 flow [2023-08-31 00:27:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:27:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:27:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2023-08-31 00:27:00,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759450171821307 [2023-08-31 00:27:00,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2023-08-31 00:27:00,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2023-08-31 00:27:00,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:27:00,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2023-08-31 00:27:00,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 00:27:00,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 00:27:00,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 00:27:00,117 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 724 transitions. [2023-08-31 00:27:00,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 356 flow [2023-08-31 00:27:00,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 352 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:27:00,121 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2023-08-31 00:27:00,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-08-31 00:27:00,122 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-31 00:27:00,122 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2023-08-31 00:27:00,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states 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 00:27:00,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:27:00,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:27:00,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 00:27:00,327 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 00:27:00,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:27:00,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:27:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1710054241, now seen corresponding path program 1 times [2023-08-31 00:27:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:27:00,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175091239] [2023-08-31 00:27:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:27:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:00,352 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 00:27:00,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:27:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175091239] [2023-08-31 00:27:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175091239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:27:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869709102] [2023-08-31 00:27:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:27:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:27:00,354 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 00:27:00,355 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 00:27:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:27:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:27:00,417 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 00:27:00,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:27:00,427 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 00:27:00,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869709102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:27:00,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:27:00,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:27:00,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338807129] [2023-08-31 00:27:00,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:27:00,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:27:00,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:27:00,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:27:00,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:27:00,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 485 [2023-08-31 00:27:00,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states 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 00:27:00,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:27:00,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 485 [2023-08-31 00:27:00,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:27:01,318 INFO L130 PetriNetUnfolder]: 10623/16504 cut-off events. [2023-08-31 00:27:01,319 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-08-31 00:27:01,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32633 conditions, 16504 events. 10623/16504 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 108155 event pairs, 9818 based on Foata normal form. 3/14244 useless extension candidates. Maximal degree in co-relation 32605. Up to 15417 conditions per place. [2023-08-31 00:27:01,367 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 57 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-31 00:27:01,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 312 flow [2023-08-31 00:27:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:27:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:27:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1354 transitions. [2023-08-31 00:27:01,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652920962199313 [2023-08-31 00:27:01,371 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1354 transitions. [2023-08-31 00:27:01,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1354 transitions. [2023-08-31 00:27:01,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:27:01,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1354 transitions. [2023-08-31 00:27:01,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 225.66666666666666) internal successors, (1354), 6 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states 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 00:27:01,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states 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 00:27:01,376 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states 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 00:27:01,376 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1354 transitions. [2023-08-31 00:27:01,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 312 flow [2023-08-31 00:27:01,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:27:01,379 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2023-08-31 00:27:01,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-08-31 00:27:01,379 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-08-31 00:27:01,380 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2023-08-31 00:27:01,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states 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 00:27:01,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:27:01,380 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:27:01,385 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 00:27:01,585 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 00:27:01,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:27:01,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:27:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1658605999, now seen corresponding path program 2 times [2023-08-31 00:27:01,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:27:01,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161848864] [2023-08-31 00:27:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:01,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:27:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:01,653 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 00:27:01,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:27:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161848864] [2023-08-31 00:27:01,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161848864] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:27:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626525431] [2023-08-31 00:27:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:27:01,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:27:01,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:27:01,655 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 00:27:01,657 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 00:27:01,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 00:27:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:27:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 00:27:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:27:01,741 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 00:27:01,772 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:27:01,772 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 00:27:01,788 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 00:27:01,834 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 00:27:01,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:27:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626525431] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:27:01,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:27:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-31 00:27:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481525422] [2023-08-31 00:27:01,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:27:01,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:27:01,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:27:01,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:27:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-31 00:27:01,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 485 [2023-08-31 00:27:01,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 207.5) internal successors, (1245), 6 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states 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 00:27:01,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:27:01,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 485 [2023-08-31 00:27:01,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:27:03,015 INFO L130 PetriNetUnfolder]: 10764/16984 cut-off events. [2023-08-31 00:27:03,015 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-08-31 00:27:03,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33923 conditions, 16984 events. 10764/16984 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 115278 event pairs, 2807 based on Foata normal form. 0/14965 useless extension candidates. Maximal degree in co-relation 33887. Up to 12964 conditions per place. [2023-08-31 00:27:03,064 INFO L137 encePairwiseOnDemand]: 475/485 looper letters, 123 selfloop transitions, 14 changer transitions 14/163 dead transitions. [2023-08-31 00:27:03,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 163 transitions, 721 flow [2023-08-31 00:27:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:27:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:27:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1388 transitions. [2023-08-31 00:27:03,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47697594501718216 [2023-08-31 00:27:03,067 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1388 transitions. [2023-08-31 00:27:03,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1388 transitions. [2023-08-31 00:27:03,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:27:03,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1388 transitions. [2023-08-31 00:27:03,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.33333333333334) internal successors, (1388), 6 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states 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 00:27:03,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states 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 00:27:03,072 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states 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 00:27:03,072 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1388 transitions. [2023-08-31 00:27:03,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 163 transitions, 721 flow [2023-08-31 00:27:03,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 163 transitions, 707 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:27:03,075 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 293 flow [2023-08-31 00:27:03,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-31 00:27:03,075 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 20 predicate places. [2023-08-31 00:27:03,076 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 293 flow [2023-08-31 00:27:03,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 207.5) internal successors, (1245), 6 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states 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 00:27:03,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:27:03,076 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 00:27:03,082 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 00:27:03,282 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 00:27:03,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:27:03,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:27:03,283 INFO L85 PathProgramCache]: Analyzing trace with hash -845271688, now seen corresponding path program 1 times [2023-08-31 00:27:03,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:27:03,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228053974] [2023-08-31 00:27:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:03,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:27:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 00:27:03,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:27:03,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228053974] [2023-08-31 00:27:03,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228053974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:27:03,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577002277] [2023-08-31 00:27:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:03,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:27:03,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:27:03,341 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 00:27:03,343 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 00:27:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:27:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:27:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 00:27:03,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:27:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 00:27:03,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577002277] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:27:03,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:27:03,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 00:27:03,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581220620] [2023-08-31 00:27:03,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:27:03,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 00:27:03,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:27:03,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 00:27:03,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 00:27:03,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 485 [2023-08-31 00:27:03,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 293 flow. Second operand has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 00:27:03,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:27:03,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 485 [2023-08-31 00:27:03,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:27:04,575 INFO L130 PetriNetUnfolder]: 10762/17136 cut-off events. [2023-08-31 00:27:04,576 INFO L131 PetriNetUnfolder]: For 5753/5761 co-relation queries the response was YES. [2023-08-31 00:27:04,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38118 conditions, 17136 events. 10762/17136 cut-off events. For 5753/5761 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 117384 event pairs, 9444 based on Foata normal form. 6/16093 useless extension candidates. Maximal degree in co-relation 38059. Up to 16223 conditions per place. [2023-08-31 00:27:04,629 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 69 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-08-31 00:27:04,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 92 transitions, 489 flow [2023-08-31 00:27:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 00:27:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 00:27:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2653 transitions. [2023-08-31 00:27:04,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558419243986254 [2023-08-31 00:27:04,634 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2653 transitions. [2023-08-31 00:27:04,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2653 transitions. [2023-08-31 00:27:04,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:27:04,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2653 transitions. [2023-08-31 00:27:04,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 221.08333333333334) internal successors, (2653), 12 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states 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 00:27:04,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states 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 00:27:04,645 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states 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 00:27:04,645 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 293 flow. Second operand 12 states and 2653 transitions. [2023-08-31 00:27:04,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 92 transitions, 489 flow [2023-08-31 00:27:04,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 92 transitions, 489 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:27:04,660 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 377 flow [2023-08-31 00:27:04,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=377, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2023-08-31 00:27:04,660 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 37 predicate places. [2023-08-31 00:27:04,660 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 377 flow [2023-08-31 00:27:04,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 00:27:04,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:27:04,661 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 00:27:04,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-31 00:27:04,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:27:04,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:27:04,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:27:04,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1266609288, now seen corresponding path program 2 times [2023-08-31 00:27:04,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:27:04,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948331927] [2023-08-31 00:27:04,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:04,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:27:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:27:04,887 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:27:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:27:04,910 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:27:04,910 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:27:04,911 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-31 00:27:04,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-31 00:27:04,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-31 00:27:04,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-31 00:27:04,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-31 00:27:04,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 00:27:04,912 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-08-31 00:27:04,913 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:27:04,913 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:27:04,938 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:27:04,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-08-31 00:27:05,005 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-08-31 00:27:05,005 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-31 00:27:05,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-08-31 00:27:05,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 339 transitions, 708 flow [2023-08-31 00:27:05,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 339 transitions, 708 flow [2023-08-31 00:27:05,017 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:27:05,017 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 339 transitions, 708 flow [2023-08-31 00:27:05,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 339 transitions, 708 flow [2023-08-31 00:27:05,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-08-31 00:27:05,078 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-08-31 00:27:05,078 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-31 00:27:05,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-08-31 00:27:05,105 INFO L119 LiptonReduction]: Number of co-enabled transitions 65604 [2023-08-31 00:27:08,249 INFO L134 LiptonReduction]: Checked pairs total: 110294 [2023-08-31 00:27:08,250 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-08-31 00:27:08,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:27:08,251 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;@73fc1fed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:27:08,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-31 00:27:08,253 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-08-31 00:27:08,253 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:27:08,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:27:08,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 00:27:08,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:27:08,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:27:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash -408859945, now seen corresponding path program 1 times [2023-08-31 00:27:08,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:27:08,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131754493] [2023-08-31 00:27:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:27:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:08,273 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 00:27:08,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:27:08,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131754493] [2023-08-31 00:27:08,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131754493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:27:08,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:27:08,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:27:08,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273316023] [2023-08-31 00:27:08,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:27:08,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:27:08,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:27:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:27:08,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:27:08,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 618 [2023-08-31 00:27:08,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states 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 00:27:08,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:27:08,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 618 [2023-08-31 00:27:08,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:27:22,953 INFO L130 PetriNetUnfolder]: 199024/283218 cut-off events. [2023-08-31 00:27:22,953 INFO L131 PetriNetUnfolder]: For 3132/3132 co-relation queries the response was YES. [2023-08-31 00:27:23,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544637 conditions, 283218 events. 199024/283218 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 7666. Compared 2271673 event pairs, 188343 based on Foata normal form. 51886/290674 useless extension candidates. Maximal degree in co-relation 50654. Up to 259483 conditions per place. [2023-08-31 00:27:24,179 INFO L137 encePairwiseOnDemand]: 573/618 looper letters, 69 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-31 00:27:24,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-08-31 00:27:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:27:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:27:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 936 transitions. [2023-08-31 00:27:24,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048543689320388 [2023-08-31 00:27:24,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 936 transitions. [2023-08-31 00:27:24,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 936 transitions. [2023-08-31 00:27:24,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:27:24,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 936 transitions. [2023-08-31 00:27:24,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 00:27:24,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 00:27:24,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 00:27:24,202 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 936 transitions. [2023-08-31 00:27:24,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-08-31 00:27:24,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:27:24,206 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 220 flow [2023-08-31 00:27:24,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-08-31 00:27:24,207 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-08-31 00:27:24,207 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 220 flow [2023-08-31 00:27:24,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states 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 00:27:24,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:27:24,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:27:24,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 00:27:24,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:27:24,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:27:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1114893743, now seen corresponding path program 1 times [2023-08-31 00:27:24,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:27:24,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178083010] [2023-08-31 00:27:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:24,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:27:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:24,233 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 00:27:24,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:27:24,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178083010] [2023-08-31 00:27:24,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178083010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:27:24,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983095885] [2023-08-31 00:27:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:24,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:27:24,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:27:24,235 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 00:27:24,241 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 00:27:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 00:27:24,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:27:24,309 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 00:27:24,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:27:24,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983095885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:27:24,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:27:24,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 00:27:24,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123650327] [2023-08-31 00:27:24,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:27:24,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:27:24,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:27:24,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:27:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:27:24,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 618 [2023-08-31 00:27:24,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 00:27:24,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:27:24,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 618 [2023-08-31 00:27:24,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:27:38,050 INFO L130 PetriNetUnfolder]: 199267/282410 cut-off events. [2023-08-31 00:27:38,050 INFO L131 PetriNetUnfolder]: For 3094/3094 co-relation queries the response was YES. [2023-08-31 00:27:38,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543876 conditions, 282410 events. 199267/282410 cut-off events. For 3094/3094 co-relation queries the response was YES. Maximal size of possible extension queue 7617. Compared 2244922 event pairs, 123187 based on Foata normal form. 0/238132 useless extension candidates. Maximal degree in co-relation 543862. Up to 259453 conditions per place. [2023-08-31 00:27:39,457 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 85 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-31 00:27:39,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 426 flow [2023-08-31 00:27:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:27:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:27:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 909 transitions. [2023-08-31 00:27:39,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49029126213592233 [2023-08-31 00:27:39,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 909 transitions. [2023-08-31 00:27:39,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 909 transitions. [2023-08-31 00:27:39,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:27:39,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 909 transitions. [2023-08-31 00:27:39,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.0) internal successors, (909), 3 states have internal predecessors, (909), 0 states have call successors, (0), 0 states 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 00:27:39,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 00:27:39,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 00:27:39,463 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 220 flow. Second operand 3 states and 909 transitions. [2023-08-31 00:27:39,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 426 flow [2023-08-31 00:27:39,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 106 transitions, 422 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:27:39,465 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 228 flow [2023-08-31 00:27:39,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2023-08-31 00:27:39,466 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-08-31 00:27:39,466 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 228 flow [2023-08-31 00:27:39,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 00:27:39,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:27:39,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:27:39,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 00:27:39,670 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 00:27:39,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:27:39,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:27:39,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2018648220, now seen corresponding path program 1 times [2023-08-31 00:27:39,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:27:39,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325487053] [2023-08-31 00:27:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:27:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:39,704 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 00:27:39,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:27:39,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325487053] [2023-08-31 00:27:39,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325487053] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:27:39,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011667963] [2023-08-31 00:27:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:39,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:27:39,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:27:39,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:27:39,709 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 00:27:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:39,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:27:39,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:27:39,783 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 00:27:39,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:27:39,791 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 00:27:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011667963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:27:39,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:27:39,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:27:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116416328] [2023-08-31 00:27:39,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:27:39,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:27:39,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:27:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:27:39,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:27:39,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 618 [2023-08-31 00:27:39,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states 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 00:27:39,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:27:39,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 618 [2023-08-31 00:27:39,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:27:54,133 INFO L130 PetriNetUnfolder]: 200915/283582 cut-off events. [2023-08-31 00:27:54,133 INFO L131 PetriNetUnfolder]: For 10256/10256 co-relation queries the response was YES. [2023-08-31 00:27:54,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552245 conditions, 283582 events. 200915/283582 cut-off events. For 10256/10256 co-relation queries the response was YES. Maximal size of possible extension queue 7563. Compared 2231185 event pairs, 188343 based on Foata normal form. 3/242695 useless extension candidates. Maximal degree in co-relation 552216. Up to 259469 conditions per place. [2023-08-31 00:27:55,416 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 70 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-08-31 00:27:55,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 390 flow [2023-08-31 00:27:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:27:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:27:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1715 transitions. [2023-08-31 00:27:55,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46251348435814454 [2023-08-31 00:27:55,419 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1715 transitions. [2023-08-31 00:27:55,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1715 transitions. [2023-08-31 00:27:55,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:27:55,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1715 transitions. [2023-08-31 00:27:55,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.8333333333333) internal successors, (1715), 6 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states 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 00:27:55,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states 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 00:27:55,425 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states 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 00:27:55,425 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 228 flow. Second operand 6 states and 1715 transitions. [2023-08-31 00:27:55,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 390 flow [2023-08-31 00:27:55,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:27:55,576 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 262 flow [2023-08-31 00:27:55,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2023-08-31 00:27:55,577 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-08-31 00:27:55,577 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 262 flow [2023-08-31 00:27:55,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states 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 00:27:55,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:27:55,577 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:27:55,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 00:27:55,777 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 00:27:55,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:27:55,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:27:55,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1180385758, now seen corresponding path program 2 times [2023-08-31 00:27:55,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:27:55,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218030294] [2023-08-31 00:27:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:27:55,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:27:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:27:55,826 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 00:27:55,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:27:55,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218030294] [2023-08-31 00:27:55,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218030294] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:27:55,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297382435] [2023-08-31 00:27:55,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:27:55,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:27:55,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:27:55,827 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 00:27:55,829 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 00:27:55,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 00:27:55,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:27:55,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 00:27:55,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:27:55,908 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 00:27:55,938 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:27:55,938 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 00:27:55,950 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 00:27:55,988 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 00:27:55,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:27:55,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297382435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:27:55,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:27:55,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-31 00:27:55,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295597102] [2023-08-31 00:27:55,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:27:55,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:27:55,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:27:55,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:27:55,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-31 00:27:56,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 618 [2023-08-31 00:27:56,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 263.3333333333333) internal successors, (1580), 6 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states 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 00:27:56,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:27:56,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 618 [2023-08-31 00:27:56,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:28:11,034 INFO L130 PetriNetUnfolder]: 203968/290834 cut-off events. [2023-08-31 00:28:11,034 INFO L131 PetriNetUnfolder]: For 10874/10874 co-relation queries the response was YES. [2023-08-31 00:28:11,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570044 conditions, 290834 events. 203968/290834 cut-off events. For 10874/10874 co-relation queries the response was YES. Maximal size of possible extension queue 8421. Compared 2365730 event pairs, 44972 based on Foata normal form. 0/254408 useless extension candidates. Maximal degree in co-relation 570007. Up to 233441 conditions per place. [2023-08-31 00:28:12,417 INFO L137 encePairwiseOnDemand]: 606/618 looper letters, 184 selfloop transitions, 18 changer transitions 0/221 dead transitions. [2023-08-31 00:28:12,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 221 transitions, 971 flow [2023-08-31 00:28:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:28:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:28:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1779 transitions. [2023-08-31 00:28:12,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797734627831715 [2023-08-31 00:28:12,421 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1779 transitions. [2023-08-31 00:28:12,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1779 transitions. [2023-08-31 00:28:12,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:28:12,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1779 transitions. [2023-08-31 00:28:12,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 296.5) internal successors, (1779), 6 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states 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 00:28:12,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states 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 00:28:12,428 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states 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 00:28:12,428 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 262 flow. Second operand 6 states and 1779 transitions. [2023-08-31 00:28:12,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 221 transitions, 971 flow [2023-08-31 00:28:12,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 221 transitions, 957 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:28:12,437 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 375 flow [2023-08-31 00:28:12,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2023-08-31 00:28:12,438 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 20 predicate places. [2023-08-31 00:28:12,438 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 375 flow [2023-08-31 00:28:12,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 263.3333333333333) internal successors, (1580), 6 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states 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 00:28:12,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:12,439 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 00:28:12,446 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 00:28:12,646 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 00:28:12,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:28:12,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:12,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1169672839, now seen corresponding path program 1 times [2023-08-31 00:28:12,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:12,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463537846] [2023-08-31 00:28:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:12,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 00:28:12,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:28:12,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463537846] [2023-08-31 00:28:12,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463537846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:28:12,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556808430] [2023-08-31 00:28:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:12,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:28:12,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:28:12,693 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 00:28:12,695 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 00:28:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:12,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:28:12,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:28:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 00:28:12,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:28:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 00:28:12,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556808430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:28:12,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:28:12,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 00:28:12,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141753144] [2023-08-31 00:28:12,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:28:12,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 00:28:12,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:28:12,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 00:28:12,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 00:28:12,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 618 [2023-08-31 00:28:12,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 375 flow. Second operand has 13 states, 13 states have (on average 274.46153846153845) internal successors, (3568), 13 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states 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 00:28:12,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:28:12,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 618 [2023-08-31 00:28:12,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:28:30,538 INFO L130 PetriNetUnfolder]: 202260/289008 cut-off events. [2023-08-31 00:28:30,539 INFO L131 PetriNetUnfolder]: For 119335/119685 co-relation queries the response was YES. [2023-08-31 00:28:31,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641967 conditions, 289008 events. 202260/289008 cut-off events. For 119335/119685 co-relation queries the response was YES. Maximal size of possible extension queue 8459. Compared 2350171 event pairs, 179661 based on Foata normal form. 6/269876 useless extension candidates. Maximal degree in co-relation 641907. Up to 267861 conditions per place. [2023-08-31 00:28:32,527 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 86 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2023-08-31 00:28:32,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 116 transitions, 605 flow [2023-08-31 00:28:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 00:28:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 00:28:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3362 transitions. [2023-08-31 00:28:32,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453344120819849 [2023-08-31 00:28:32,532 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3362 transitions. [2023-08-31 00:28:32,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3362 transitions. [2023-08-31 00:28:32,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:28:32,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3362 transitions. [2023-08-31 00:28:32,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 280.1666666666667) internal successors, (3362), 12 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states 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 00:28:32,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 618.0) internal successors, (8034), 13 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states 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 00:28:32,544 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 618.0) internal successors, (8034), 13 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states 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 00:28:32,544 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 375 flow. Second operand 12 states and 3362 transitions. [2023-08-31 00:28:32,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 116 transitions, 605 flow [2023-08-31 00:28:32,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 116 transitions, 605 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:28:32,811 INFO L231 Difference]: Finished difference. Result has 125 places, 116 transitions, 459 flow [2023-08-31 00:28:32,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=125, PETRI_TRANSITIONS=116} [2023-08-31 00:28:32,812 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 37 predicate places. [2023-08-31 00:28:32,812 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 116 transitions, 459 flow [2023-08-31 00:28:32,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 274.46153846153845) internal successors, (3568), 13 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states 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 00:28:32,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:32,812 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 00:28:32,821 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 00:28:33,016 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 00:28:33,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:28:33,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:33,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2036537415, now seen corresponding path program 2 times [2023-08-31 00:28:33,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:33,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66709052] [2023-08-31 00:28:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:33,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:28:33,041 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:28:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:28:33,070 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:28:33,070 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:28:33,070 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-31 00:28:33,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-31 00:28:33,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-31 00:28:33,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-31 00:28:33,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-31 00:28:33,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-31 00:28:33,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 00:28:33,071 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-08-31 00:28:33,072 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:28:33,072 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:28:33,097 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:28:33,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 412 transitions, 868 flow [2023-08-31 00:28:33,181 INFO L130 PetriNetUnfolder]: 157/890 cut-off events. [2023-08-31 00:28:33,181 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-08-31 00:28:33,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 890 events. 157/890 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4207 event pairs, 6 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-08-31 00:28:33,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 348 places, 412 transitions, 868 flow [2023-08-31 00:28:33,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 348 places, 412 transitions, 868 flow [2023-08-31 00:28:33,197 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:28:33,198 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 348 places, 412 transitions, 868 flow [2023-08-31 00:28:33,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 348 places, 412 transitions, 868 flow [2023-08-31 00:28:33,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 412 transitions, 868 flow [2023-08-31 00:28:33,279 INFO L130 PetriNetUnfolder]: 157/890 cut-off events. [2023-08-31 00:28:33,280 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-08-31 00:28:33,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 890 events. 157/890 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4207 event pairs, 6 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-08-31 00:28:33,326 INFO L119 LiptonReduction]: Number of co-enabled transitions 108488 [2023-08-31 00:28:36,746 INFO L134 LiptonReduction]: Checked pairs total: 188751 [2023-08-31 00:28:36,746 INFO L136 LiptonReduction]: Total number of compositions: 337 [2023-08-31 00:28:36,748 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:28:36,749 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;@73fc1fed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:28:36,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-31 00:28:36,750 INFO L130 PetriNetUnfolder]: 7/23 cut-off events. [2023-08-31 00:28:36,750 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:28:36,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:36,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 00:28:36,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 00:28:36,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1929788073, now seen corresponding path program 1 times [2023-08-31 00:28:36,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:36,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807691981] [2023-08-31 00:28:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:36,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:36,769 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 00:28:36,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:28:36,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807691981] [2023-08-31 00:28:36,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807691981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:28:36,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:28:36,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:28:36,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50488718] [2023-08-31 00:28:36,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:28:36,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:28:36,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:28:36,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:28:36,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:28:36,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 749 [2023-08-31 00:28:36,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states 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 00:28:36,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:28:36,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 749 [2023-08-31 00:28:36,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand