./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/pthread/stack_longer-1.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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 09:01:52,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:01:52,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:01:52,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:01:52,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:01:52,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:01:52,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:01:52,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:01:52,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:01:52,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:01:52,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:01:52,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:01:52,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:01:52,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:01:52,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:01:52,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:01:52,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:01:52,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:01:52,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:01:52,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:01:52,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:01:52,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:01:52,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:01:52,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:01:52,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:01:52,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:01:52,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:01:52,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:01:52,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:01:52,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:01:52,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:01:52,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:01:52,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:01:52,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:01:52,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:01:52,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:01:52,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:01:52,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:01:52,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:01:52,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:01:52,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:01:52,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:01:52,217 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:01:52,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:01:52,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:01:52,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:01:52,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:01:52,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:01:52,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:01:52,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:01:52,221 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:01:52,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:01:52,222 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:01:52,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:01:52,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:01:52,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:01:52,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:01:52,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:01:52,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:01:52,223 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:01:52,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:01:52,223 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:01:52,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:01:52,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:01:52,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:01:52,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:01:52,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:01:52,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:01:52,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:01:52,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:01:52,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:01:52,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:01:52,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:01:52,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:01:52,226 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:01:52,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:01:52,226 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:01:52,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:01:52,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:01:52,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:01:52,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:01:52,581 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:01:52,581 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:01:52,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2023-09-01 09:01:53,766 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:01:54,114 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:01:54,115 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2023-09-01 09:01:54,139 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319665ca3/c053c89a03664a4fa8733e495db7cf72/FLAGb24cc49a2 [2023-09-01 09:01:54,168 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319665ca3/c053c89a03664a4fa8733e495db7cf72 [2023-09-01 09:01:54,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:01:54,172 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:01:54,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:01:54,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:01:54,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:01:54,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@972fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54, skipping insertion in model container [2023-09-01 09:01:54,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:01:54,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:01:54,677 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-09-01 09:01:54,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:01:54,724 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:01:54,767 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-09-01 09:01:54,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:01:54,834 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:01:54,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54 WrapperNode [2023-09-01 09:01:54,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:01:54,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:01:54,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:01:54,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:01:54,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,880 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-09-01 09:01:54,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:01:54,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:01:54,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:01:54,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:01:54,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,905 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:01:54,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:01:54,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:01:54,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:01:54,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (1/1) ... [2023-09-01 09:01:54,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:01:54,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:01:54,945 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) [2023-09-01 09:01:54,950 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 [2023-09-01 09:01:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 09:01:54,973 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 09:01:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 09:01:54,973 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 09:01:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:01:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:01:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 09:01:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:01:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 09:01:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:01:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:01:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:01:54,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:01:54,976 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 09:01:55,124 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:01:55,146 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:01:55,387 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:01:55,394 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:01:55,395 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 09:01:55,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:01:55 BoogieIcfgContainer [2023-09-01 09:01:55,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:01:55,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:01:55,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:01:55,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:01:55,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:01:54" (1/3) ... [2023-09-01 09:01:55,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e03f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:01:55, skipping insertion in model container [2023-09-01 09:01:55,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:54" (2/3) ... [2023-09-01 09:01:55,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e03f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:01:55, skipping insertion in model container [2023-09-01 09:01:55,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:01:55" (3/3) ... [2023-09-01 09:01:55,404 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-09-01 09:01:55,410 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:01:55,418 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:01:55,419 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-09-01 09:01:55,419 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:01:55,534 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 09:01:55,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 332 flow [2023-09-01 09:01:55,675 INFO L130 PetriNetUnfolder]: 10/156 cut-off events. [2023-09-01 09:01:55,675 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:01:55,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 10/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 373 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-09-01 09:01:55,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 158 transitions, 332 flow [2023-09-01 09:01:55,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 147 transitions, 303 flow [2023-09-01 09:01:55,694 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:01:55,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 147 transitions, 303 flow [2023-09-01 09:01:55,709 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 147 transitions, 303 flow [2023-09-01 09:01:55,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 147 transitions, 303 flow [2023-09-01 09:01:55,760 INFO L130 PetriNetUnfolder]: 10/147 cut-off events. [2023-09-01 09:01:55,760 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 09:01:55,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 10/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-09-01 09:01:55,767 INFO L119 LiptonReduction]: Number of co-enabled transitions 7334 [2023-09-01 09:01:59,305 INFO L134 LiptonReduction]: Checked pairs total: 10082 [2023-09-01 09:01:59,305 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-09-01 09:01:59,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 09:01:59,323 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;@2d92c0e1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:01:59,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-09-01 09:01:59,328 INFO L130 PetriNetUnfolder]: 0/12 cut-off events. [2023-09-01 09:01:59,328 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 09:01:59,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:01:59,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 09:01:59,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:01:59,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:01:59,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1684934246, now seen corresponding path program 1 times [2023-09-01 09:01:59,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:01:59,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446604096] [2023-09-01 09:01:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:59,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:01:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:01:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:59,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:01:59,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446604096] [2023-09-01 09:01:59,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446604096] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:01:59,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:01:59,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:01:59,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832125507] [2023-09-01 09:01:59,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:01:59,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:01:59,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:01:59,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:01:59,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:01:59,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 293 [2023-09-01 09:01:59,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:59,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:01:59,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 293 [2023-09-01 09:01:59,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:01:59,922 INFO L130 PetriNetUnfolder]: 845/1382 cut-off events. [2023-09-01 09:01:59,922 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-09-01 09:01:59,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2798 conditions, 1382 events. 845/1382 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5801 event pairs, 243 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 2590. Up to 777 conditions per place. [2023-09-01 09:01:59,931 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-09-01 09:01:59,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 253 flow [2023-09-01 09:01:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:01:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:01:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-09-01 09:01:59,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5563139931740614 [2023-09-01 09:01:59,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-09-01 09:01:59,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-09-01 09:01:59,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:01:59,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-09-01 09:01:59,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:59,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:59,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:59,960 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 489 transitions. [2023-09-01 09:01:59,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 253 flow [2023-09-01 09:01:59,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 09:01:59,965 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-09-01 09:01:59,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-09-01 09:01:59,969 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-09-01 09:01:59,969 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-09-01 09:01:59,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:59,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:01:59,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:01:59,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:01:59,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:01:59,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:01:59,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1024065199, now seen corresponding path program 1 times [2023-09-01 09:01:59,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:01:59,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691463825] [2023-09-01 09:01:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:59,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:01:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:00,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:00,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691463825] [2023-09-01 09:02:00,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691463825] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:00,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:00,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:02:00,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839447360] [2023-09-01 09:02:00,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:00,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:02:00,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:00,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:02:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:02:00,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 293 [2023-09-01 09:02:00,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:00,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 293 [2023-09-01 09:02:00,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:00,301 INFO L130 PetriNetUnfolder]: 889/1469 cut-off events. [2023-09-01 09:02:00,301 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2023-09-01 09:02:00,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 1469 events. 889/1469 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6039 event pairs, 401 based on Foata normal form. 22/1279 useless extension candidates. Maximal degree in co-relation 2803. Up to 1189 conditions per place. [2023-09-01 09:02:00,309 INFO L137 encePairwiseOnDemand]: 290/293 looper letters, 48 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-09-01 09:02:00,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 249 flow [2023-09-01 09:02:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:02:00,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:02:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-09-01 09:02:00,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494880546075085 [2023-09-01 09:02:00,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-09-01 09:02:00,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-09-01 09:02:00,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:00,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-09-01 09:02:00,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,318 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 483 transitions. [2023-09-01 09:02:00,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 249 flow [2023-09-01 09:02:00,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 09:02:00,321 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-09-01 09:02:00,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-09-01 09:02:00,322 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-09-01 09:02:00,322 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-09-01 09:02:00,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:00,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:00,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:02:00,324 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:00,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash 794946535, now seen corresponding path program 1 times [2023-09-01 09:02:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:00,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763587715] [2023-09-01 09:02:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:00,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:00,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:00,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763587715] [2023-09-01 09:02:00,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763587715] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:00,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:00,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:02:00,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472043944] [2023-09-01 09:02:00,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:00,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:02:00,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:00,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:02:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:02:00,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 293 [2023-09-01 09:02:00,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:00,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 293 [2023-09-01 09:02:00,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:00,571 INFO L130 PetriNetUnfolder]: 942/1555 cut-off events. [2023-09-01 09:02:00,571 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-09-01 09:02:00,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1555 events. 942/1555 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6593 event pairs, 653 based on Foata normal form. 50/1437 useless extension candidates. Maximal degree in co-relation 3052. Up to 1389 conditions per place. [2023-09-01 09:02:00,580 INFO L137 encePairwiseOnDemand]: 290/293 looper letters, 51 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-09-01 09:02:00,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 266 flow [2023-09-01 09:02:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:02:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:02:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-09-01 09:02:00,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5449374288964732 [2023-09-01 09:02:00,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-09-01 09:02:00,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-09-01 09:02:00,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:00,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-09-01 09:02:00,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,587 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 479 transitions. [2023-09-01 09:02:00,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 266 flow [2023-09-01 09:02:00,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:02:00,589 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-09-01 09:02:00,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-09-01 09:02:00,590 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-09-01 09:02:00,590 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-09-01 09:02:00,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:00,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:00,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:02:00,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:00,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1768410213, now seen corresponding path program 1 times [2023-09-01 09:02:00,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:00,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860737243] [2023-09-01 09:02:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:00,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:00,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:00,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860737243] [2023-09-01 09:02:00,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860737243] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:00,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268238305] [2023-09-01 09:02:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:00,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:00,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:00,697 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) [2023-09-01 09:02:00,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 09:02:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:00,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 09:02:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:00,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:02:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:00,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268238305] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:02:00,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:02:00,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-09-01 09:02:00,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786236550] [2023-09-01 09:02:00,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:02:00,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 09:02:00,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:00,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 09:02:00,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 09:02:01,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 293 [2023-09-01 09:02:01,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:01,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:01,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 293 [2023-09-01 09:02:01,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:01,500 INFO L130 PetriNetUnfolder]: 1815/3000 cut-off events. [2023-09-01 09:02:01,500 INFO L131 PetriNetUnfolder]: For 1075/1075 co-relation queries the response was YES. [2023-09-01 09:02:01,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7073 conditions, 3000 events. 1815/3000 cut-off events. For 1075/1075 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14146 event pairs, 349 based on Foata normal form. 48/2736 useless extension candidates. Maximal degree in co-relation 6486. Up to 844 conditions per place. [2023-09-01 09:02:01,515 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 164 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2023-09-01 09:02:01,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 187 transitions, 900 flow [2023-09-01 09:02:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 09:02:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 09:02:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1585 transitions. [2023-09-01 09:02:01,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409556313993175 [2023-09-01 09:02:01,520 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1585 transitions. [2023-09-01 09:02:01,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1585 transitions. [2023-09-01 09:02:01,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:01,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1585 transitions. [2023-09-01 09:02:01,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:01,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 293.0) internal successors, (3223), 11 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:01,530 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 293.0) internal successors, (3223), 11 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:01,530 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1585 transitions. [2023-09-01 09:02:01,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 187 transitions, 900 flow [2023-09-01 09:02:01,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 187 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:02:01,537 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-09-01 09:02:01,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-09-01 09:02:01,538 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-09-01 09:02:01,538 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-09-01 09:02:01,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:01,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:01,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:01,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 09:02:01,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:01,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:01,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:01,746 INFO L85 PathProgramCache]: Analyzing trace with hash 362891190, now seen corresponding path program 1 times [2023-09-01 09:02:01,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:01,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738875802] [2023-09-01 09:02:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:01,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:01,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:01,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738875802] [2023-09-01 09:02:01,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738875802] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:01,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:01,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:02:01,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370926261] [2023-09-01 09:02:01,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:01,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:02:01,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:01,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:02:01,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:02:01,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 293 [2023-09-01 09:02:01,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:01,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:01,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 293 [2023-09-01 09:02:01,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:01,974 INFO L130 PetriNetUnfolder]: 613/1142 cut-off events. [2023-09-01 09:02:01,974 INFO L131 PetriNetUnfolder]: For 302/302 co-relation queries the response was YES. [2023-09-01 09:02:01,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 1142 events. 613/1142 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4886 event pairs, 98 based on Foata normal form. 0/1062 useless extension candidates. Maximal degree in co-relation 1750. Up to 861 conditions per place. [2023-09-01 09:02:01,981 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 49 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-09-01 09:02:01,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 335 flow [2023-09-01 09:02:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:02:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:02:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-09-01 09:02:01,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5301478953356087 [2023-09-01 09:02:01,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-09-01 09:02:01,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-09-01 09:02:01,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:01,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-09-01 09:02:01,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:01,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:01,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:01,987 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 466 transitions. [2023-09-01 09:02:01,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 335 flow [2023-09-01 09:02:01,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 323 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 09:02:01,991 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-09-01 09:02:01,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-09-01 09:02:01,994 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-09-01 09:02:01,994 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-09-01 09:02:01,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:01,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:01,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:01,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:02:01,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:01,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:01,996 INFO L85 PathProgramCache]: Analyzing trace with hash 647657202, now seen corresponding path program 1 times [2023-09-01 09:02:01,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:01,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430825922] [2023-09-01 09:02:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:02,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:02,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:02,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430825922] [2023-09-01 09:02:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430825922] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:02,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:02,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 09:02:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763535942] [2023-09-01 09:02:02,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:02,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:02:02,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:02,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:02:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:02:02,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 293 [2023-09-01 09:02:02,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:02,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:02,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 293 [2023-09-01 09:02:02,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:02,387 INFO L130 PetriNetUnfolder]: 727/1350 cut-off events. [2023-09-01 09:02:02,387 INFO L131 PetriNetUnfolder]: For 423/423 co-relation queries the response was YES. [2023-09-01 09:02:02,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3420 conditions, 1350 events. 727/1350 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5723 event pairs, 207 based on Foata normal form. 12/1362 useless extension candidates. Maximal degree in co-relation 2672. Up to 529 conditions per place. [2023-09-01 09:02:02,405 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 80 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-09-01 09:02:02,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 92 transitions, 526 flow [2023-09-01 09:02:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 09:02:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 09:02:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 784 transitions. [2023-09-01 09:02:02,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351535836177475 [2023-09-01 09:02:02,409 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 784 transitions. [2023-09-01 09:02:02,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 784 transitions. [2023-09-01 09:02:02,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:02,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 784 transitions. [2023-09-01 09:02:02,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:02,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:02,417 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:02,417 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 5 states and 784 transitions. [2023-09-01 09:02:02,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 92 transitions, 526 flow [2023-09-01 09:02:02,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 513 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:02:02,422 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 258 flow [2023-09-01 09:02:02,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-09-01 09:02:02,425 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-09-01 09:02:02,426 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 258 flow [2023-09-01 09:02:02,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:02,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:02,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:02,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:02:02,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:02,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:02,427 INFO L85 PathProgramCache]: Analyzing trace with hash 461657146, now seen corresponding path program 1 times [2023-09-01 09:02:02,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:02,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971016904] [2023-09-01 09:02:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:02,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:03,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:03,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971016904] [2023-09-01 09:02:03,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971016904] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:03,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:03,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 09:02:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6973363] [2023-09-01 09:02:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:03,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 09:02:03,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 09:02:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-09-01 09:02:03,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 09:02:03,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 258 flow. Second operand has 11 states, 11 states have (on average 126.0) internal successors, (1386), 11 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:03,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:03,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 09:02:03,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:04,255 INFO L130 PetriNetUnfolder]: 1075/1997 cut-off events. [2023-09-01 09:02:04,256 INFO L131 PetriNetUnfolder]: For 1232/1232 co-relation queries the response was YES. [2023-09-01 09:02:04,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5096 conditions, 1997 events. 1075/1997 cut-off events. For 1232/1232 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9740 event pairs, 295 based on Foata normal form. 0/1979 useless extension candidates. Maximal degree in co-relation 3100. Up to 1191 conditions per place. [2023-09-01 09:02:04,266 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 115 selfloop transitions, 11 changer transitions 3/130 dead transitions. [2023-09-01 09:02:04,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 130 transitions, 796 flow [2023-09-01 09:02:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 09:02:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 09:02:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1226 transitions. [2023-09-01 09:02:04,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46492226014410315 [2023-09-01 09:02:04,271 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1226 transitions. [2023-09-01 09:02:04,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1226 transitions. [2023-09-01 09:02:04,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:04,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1226 transitions. [2023-09-01 09:02:04,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.22222222222223) internal successors, (1226), 9 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:04,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:04,280 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:04,280 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 258 flow. Second operand 9 states and 1226 transitions. [2023-09-01 09:02:04,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 130 transitions, 796 flow [2023-09-01 09:02:04,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 130 transitions, 776 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 09:02:04,286 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 327 flow [2023-09-01 09:02:04,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=327, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-09-01 09:02:04,286 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 31 predicate places. [2023-09-01 09:02:04,287 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 327 flow [2023-09-01 09:02:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 126.0) internal successors, (1386), 11 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:04,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:04,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:04,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:02:04,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:04,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash -329150994, now seen corresponding path program 2 times [2023-09-01 09:02:04,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:04,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730002232] [2023-09-01 09:02:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:04,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:04,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:04,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730002232] [2023-09-01 09:02:04,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730002232] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:04,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:04,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 09:02:04,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110621989] [2023-09-01 09:02:04,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:04,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 09:02:04,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:04,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 09:02:04,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-09-01 09:02:05,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 293 [2023-09-01 09:02:05,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 327 flow. Second operand has 11 states, 11 states have (on average 126.0) internal successors, (1386), 11 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:05,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:05,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 293 [2023-09-01 09:02:05,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:06,152 INFO L130 PetriNetUnfolder]: 1373/2553 cut-off events. [2023-09-01 09:02:06,153 INFO L131 PetriNetUnfolder]: For 1522/1522 co-relation queries the response was YES. [2023-09-01 09:02:06,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6951 conditions, 2553 events. 1373/2553 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12875 event pairs, 355 based on Foata normal form. 0/2529 useless extension candidates. Maximal degree in co-relation 4514. Up to 1110 conditions per place. [2023-09-01 09:02:06,169 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 115 selfloop transitions, 16 changer transitions 3/135 dead transitions. [2023-09-01 09:02:06,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 885 flow [2023-09-01 09:02:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 09:02:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 09:02:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1226 transitions. [2023-09-01 09:02:06,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46492226014410315 [2023-09-01 09:02:06,173 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1226 transitions. [2023-09-01 09:02:06,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1226 transitions. [2023-09-01 09:02:06,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:06,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1226 transitions. [2023-09-01 09:02:06,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.22222222222223) internal successors, (1226), 9 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:06,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:06,181 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:06,181 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 327 flow. Second operand 9 states and 1226 transitions. [2023-09-01 09:02:06,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 885 flow [2023-09-01 09:02:06,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 885 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 09:02:06,188 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 419 flow [2023-09-01 09:02:06,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=419, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2023-09-01 09:02:06,189 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2023-09-01 09:02:06,189 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 419 flow [2023-09-01 09:02:06,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 126.0) internal successors, (1386), 11 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:06,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:06,190 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:06,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:02:06,190 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:06,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1790252439, now seen corresponding path program 1 times [2023-09-01 09:02:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:06,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350097043] [2023-09-01 09:02:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 09:02:06,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:06,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350097043] [2023-09-01 09:02:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350097043] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:06,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:06,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 09:02:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345096618] [2023-09-01 09:02:06,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:06,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 09:02:06,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 09:02:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 09:02:06,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 293 [2023-09-01 09:02:06,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 135.42857142857142) internal successors, (948), 7 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:06,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:06,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 293 [2023-09-01 09:02:06,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:06,800 INFO L130 PetriNetUnfolder]: 1393/2595 cut-off events. [2023-09-01 09:02:06,800 INFO L131 PetriNetUnfolder]: For 2184/2184 co-relation queries the response was YES. [2023-09-01 09:02:06,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7489 conditions, 2595 events. 1393/2595 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12907 event pairs, 474 based on Foata normal form. 16/2581 useless extension candidates. Maximal degree in co-relation 5306. Up to 926 conditions per place. [2023-09-01 09:02:06,827 INFO L137 encePairwiseOnDemand]: 285/293 looper letters, 113 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2023-09-01 09:02:06,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 134 transitions, 961 flow [2023-09-01 09:02:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 09:02:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 09:02:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1291 transitions. [2023-09-01 09:02:06,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895714827455442 [2023-09-01 09:02:06,831 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1291 transitions. [2023-09-01 09:02:06,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1291 transitions. [2023-09-01 09:02:06,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:06,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1291 transitions. [2023-09-01 09:02:06,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.44444444444446) internal successors, (1291), 9 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:06,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:06,839 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:06,839 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 419 flow. Second operand 9 states and 1291 transitions. [2023-09-01 09:02:06,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 134 transitions, 961 flow [2023-09-01 09:02:06,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 134 transitions, 931 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-09-01 09:02:06,853 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 554 flow [2023-09-01 09:02:06,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=554, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2023-09-01 09:02:06,854 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 50 predicate places. [2023-09-01 09:02:06,854 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 554 flow [2023-09-01 09:02:06,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.42857142857142) internal successors, (948), 7 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:06,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:06,855 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:06,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:02:06,856 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:06,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:06,856 INFO L85 PathProgramCache]: Analyzing trace with hash 566216759, now seen corresponding path program 1 times [2023-09-01 09:02:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:06,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642645844] [2023-09-01 09:02:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:06,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:02:06,887 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:02:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:02:06,946 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:02:06,946 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:02:06,947 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-09-01 09:02:06,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-09-01 09:02:06,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-09-01 09:02:06,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-09-01 09:02:06,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-09-01 09:02:06,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-09-01 09:02:06,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:02:06,950 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:06,955 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 09:02:06,955 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 09:02:07,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 09:02:07 BasicIcfg [2023-09-01 09:02:07,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 09:02:07,023 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 09:02:07,023 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 09:02:07,024 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 09:02:07,024 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:01:55" (3/4) ... [2023-09-01 09:02:07,026 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-09-01 09:02:07,090 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 09:02:07,090 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 09:02:07,091 INFO L158 Benchmark]: Toolchain (without parser) took 12918.81ms. Allocated memory was 65.0MB in the beginning and 241.2MB in the end (delta: 176.2MB). Free memory was 40.4MB in the beginning and 180.8MB in the end (delta: -140.3MB). Peak memory consumption was 38.9MB. Max. memory is 16.1GB. [2023-09-01 09:02:07,091 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 65.0MB. Free memory is still 42.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:02:07,091 INFO L158 Benchmark]: CACSL2BoogieTranslator took 660.51ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 40.1MB in the beginning and 41.3MB in the end (delta: -1.2MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2023-09-01 09:02:07,091 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.88ms. Allocated memory is still 79.7MB. Free memory was 40.9MB in the beginning and 38.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:02:07,092 INFO L158 Benchmark]: Boogie Preprocessor took 27.70ms. Allocated memory is still 79.7MB. Free memory was 38.5MB in the beginning and 36.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:02:07,092 INFO L158 Benchmark]: RCFGBuilder took 487.50ms. Allocated memory is still 79.7MB. Free memory was 36.7MB in the beginning and 44.3MB in the end (delta: -7.5MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. [2023-09-01 09:02:07,092 INFO L158 Benchmark]: TraceAbstraction took 11624.36ms. Allocated memory was 79.7MB in the beginning and 241.2MB in the end (delta: 161.5MB). Free memory was 43.9MB in the beginning and 191.3MB in the end (delta: -147.4MB). Peak memory consumption was 144.8MB. Max. memory is 16.1GB. [2023-09-01 09:02:07,093 INFO L158 Benchmark]: Witness Printer took 66.82ms. Allocated memory is still 241.2MB. Free memory was 191.3MB in the beginning and 180.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 09:02:07,095 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 65.0MB. Free memory is still 42.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 660.51ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 40.1MB in the beginning and 41.3MB in the end (delta: -1.2MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.88ms. Allocated memory is still 79.7MB. Free memory was 40.9MB in the beginning and 38.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.70ms. Allocated memory is still 79.7MB. Free memory was 38.5MB in the beginning and 36.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 487.50ms. Allocated memory is still 79.7MB. Free memory was 36.7MB in the beginning and 44.3MB in the end (delta: -7.5MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. * TraceAbstraction took 11624.36ms. Allocated memory was 79.7MB in the beginning and 241.2MB in the end (delta: 161.5MB). Free memory was 43.9MB in the beginning and 191.3MB in the end (delta: -147.4MB). Peak memory consumption was 144.8MB. Max. memory is 16.1GB. * Witness Printer took 66.82ms. Allocated memory is still 241.2MB. Free memory was 191.3MB in the beginning and 180.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6s, 144 PlacesBefore, 35 PlacesAfterwards, 147 TransitionsBefore, 33 TransitionsAfterwards, 7334 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 5 ChoiceCompositions, 135 TotalNumberOfCompositions, 10082 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7371, independent: 7178, independent conditional: 0, independent unconditional: 7178, dependent: 193, dependent conditional: 0, dependent unconditional: 193, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4167, independent: 4119, independent conditional: 0, independent unconditional: 4119, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7371, independent: 3059, independent conditional: 0, independent unconditional: 3059, dependent: 145, dependent conditional: 0, dependent unconditional: 145, unknown: 4167, unknown conditional: 0, unknown unconditional: 4167] , Statistics on independence cache: Total cache size (in pairs): 178, Positive cache size: 162, Positive conditional cache size: 0, Positive unconditional cache size: 162, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 940]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 250 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11.4s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1199 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1019 mSDsluCounter, 851 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 844 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3528 IncrementalHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 7 mSDtfsCounter, 3528 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=554occurred in iteration=9, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 1523 SizeOfPredicates, 1 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-09-01 09:02:07,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE