./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/stack-2.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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:49:39,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:49:39,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:49:39,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:49:39,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:49:39,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:49:39,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:49:39,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:49:39,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:49:39,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:49:39,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:49:39,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:49:39,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:49:39,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:49:39,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:49:39,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:49:39,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:49:39,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:49:39,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:49:39,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:49:39,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:49:39,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:49:39,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:49:39,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:49:39,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:49:39,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:49:39,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:49:39,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:49:39,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:49:39,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:49:39,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:49:39,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:49:39,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:49:39,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:49:39,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:49:39,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:49:39,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:49:39,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:49:39,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:49:39,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:49:39,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:49:39,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:49:39,449 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:49:39,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:49:39,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:49:39,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:49:39,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:49:39,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:49:39,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:49:39,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:49:39,451 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:49:39,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:49:39,451 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:49:39,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:49:39,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:49:39,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:49:39,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:49:39,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:49:39,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:49:39,452 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:49:39,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:49:39,452 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:49:39,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:49:39,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:49:39,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:49:39,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:49:39,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:49:39,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:49:39,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:49:39,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:49:39,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:49:39,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:49:39,454 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:49:39,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:49:39,454 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:49:39,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:49:39,454 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:49:39,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:49:39,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:49:39,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:49:39,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:49:39,749 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:49:39,749 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:49:39,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-08-30 22:49:40,866 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:49:41,138 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:49:41,139 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-08-30 22:49:41,151 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7146a53c5/9e7323baab304634988b4ec16bb42fbd/FLAG3af2098bf [2023-08-30 22:49:41,441 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7146a53c5/9e7323baab304634988b4ec16bb42fbd [2023-08-30 22:49:41,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:49:41,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:49:41,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:49:41,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:49:41,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:49:41,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:41,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e8d1ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41, skipping insertion in model container [2023-08-30 22:49:41,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:41,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:49:41,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:49:41,828 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-2.i[41520,41533] [2023-08-30 22:49:41,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:49:41,871 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:49:41,912 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-2.i[41520,41533] [2023-08-30 22:49:41,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:49:41,996 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:49:41,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41 WrapperNode [2023-08-30 22:49:41,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:49:41,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:49:41,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:49:41,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:49:42,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,052 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 160 [2023-08-30 22:49:42,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:49:42,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:49:42,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:49:42,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:49:42,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,100 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:49:42,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:49:42,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:49:42,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:49:42,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (1/1) ... [2023-08-30 22:49:42,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:49:42,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:49:42,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 22:49:42,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 22:49:42,187 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 22:49:42,187 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 22:49:42,187 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 22:49:42,188 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 22:49:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:49:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:49:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 22:49:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:49:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 22:49:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:49:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:49:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:49:42,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:49:42,191 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:49:42,354 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:49:42,356 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:49:42,661 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:49:42,670 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:49:42,673 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 22:49:42,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:49:42 BoogieIcfgContainer [2023-08-30 22:49:42,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:49:42,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:49:42,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:49:42,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:49:42,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:49:41" (1/3) ... [2023-08-30 22:49:42,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f657fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:49:42, skipping insertion in model container [2023-08-30 22:49:42,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:49:41" (2/3) ... [2023-08-30 22:49:42,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f657fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:49:42, skipping insertion in model container [2023-08-30 22:49:42,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:49:42" (3/3) ... [2023-08-30 22:49:42,684 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-08-30 22:49:42,692 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:49:42,701 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:49:42,701 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 22:49:42,701 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:49:42,804 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 22:49:42,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 162 transitions, 340 flow [2023-08-30 22:49:42,926 INFO L130 PetriNetUnfolder]: 10/160 cut-off events. [2023-08-30 22:49:42,926 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:49:42,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 10/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 379 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-08-30 22:49:42,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 162 transitions, 340 flow [2023-08-30 22:49:42,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 151 transitions, 311 flow [2023-08-30 22:49:42,945 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:49:42,954 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 151 transitions, 311 flow [2023-08-30 22:49:42,956 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 151 transitions, 311 flow [2023-08-30 22:49:42,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 151 transitions, 311 flow [2023-08-30 22:49:42,994 INFO L130 PetriNetUnfolder]: 10/151 cut-off events. [2023-08-30 22:49:43,005 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:49:43,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 151 events. 10/151 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 311 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-08-30 22:49:43,011 INFO L119 LiptonReduction]: Number of co-enabled transitions 7334 [2023-08-30 22:49:46,668 INFO L134 LiptonReduction]: Checked pairs total: 9688 [2023-08-30 22:49:46,669 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-30 22:49:46,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:49:46,686 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;@72d00728, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:49:46,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 22:49:46,691 INFO L130 PetriNetUnfolder]: 0/12 cut-off events. [2023-08-30 22:49:46,691 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:49:46,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:49:46,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 22:49:46,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:49:46,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:49:46,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2091505467, now seen corresponding path program 1 times [2023-08-30 22:49:46,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:49:46,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857410019] [2023-08-30 22:49:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:49:46,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:49:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:49:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:49:47,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:49:47,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857410019] [2023-08-30 22:49:47,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857410019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:49:47,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:49:47,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:49:47,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026992878] [2023-08-30 22:49:47,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:49:47,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:49:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:49:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:49:47,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:49:47,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 303 [2023-08-30 22:49:47,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:49:47,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 303 [2023-08-30 22:49:47,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:49:47,286 INFO L130 PetriNetUnfolder]: 839/1372 cut-off events. [2023-08-30 22:49:47,286 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-30 22:49:47,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2780 conditions, 1372 events. 839/1372 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5785 event pairs, 240 based on Foata normal form. 0/1074 useless extension candidates. Maximal degree in co-relation 2556. Up to 772 conditions per place. [2023-08-30 22:49:47,295 INFO L137 encePairwiseOnDemand]: 298/303 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-30 22:49:47,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 253 flow [2023-08-30 22:49:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:49:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:49:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-30 22:49:47,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511551155115512 [2023-08-30 22:49:47,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-30 22:49:47,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-30 22:49:47,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:49:47,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-30 22:49:47,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,378 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 501 transitions. [2023-08-30 22:49:47,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 253 flow [2023-08-30 22:49:47,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 22:49:47,384 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-08-30 22:49:47,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, 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} [2023-08-30 22:49:47,401 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-08-30 22:49:47,401 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-08-30 22:49:47,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:49:47,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:49:47,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:49:47,403 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:49:47,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:49:47,403 INFO L85 PathProgramCache]: Analyzing trace with hash 985591015, now seen corresponding path program 1 times [2023-08-30 22:49:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:49:47,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114655604] [2023-08-30 22:49:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:49:47,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:49:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:49:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:49:47,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:49:47,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114655604] [2023-08-30 22:49:47,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114655604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:49:47,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:49:47,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:49:47,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337941785] [2023-08-30 22:49:47,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:49:47,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:49:47,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:49:47,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:49:47,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:49:47,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 303 [2023-08-30 22:49:47,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:49:47,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 303 [2023-08-30 22:49:47,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:49:47,654 INFO L130 PetriNetUnfolder]: 897/1480 cut-off events. [2023-08-30 22:49:47,654 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-08-30 22:49:47,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 1480 events. 897/1480 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6152 event pairs, 398 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2952. Up to 1184 conditions per place. [2023-08-30 22:49:47,661 INFO L137 encePairwiseOnDemand]: 300/303 looper letters, 48 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-08-30 22:49:47,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 249 flow [2023-08-30 22:49:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:49:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:49:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-30 22:49:47,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5445544554455446 [2023-08-30 22:49:47,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-30 22:49:47,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-30 22:49:47,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:49:47,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-30 22:49:47,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,669 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 495 transitions. [2023-08-30 22:49:47,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 249 flow [2023-08-30 22:49:47,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 22:49:47,672 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-08-30 22:49:47,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, 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} [2023-08-30 22:49:47,673 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-30 22:49:47,673 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-08-30 22:49:47,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:49:47,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:49:47,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:49:47,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:49:47,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:49:47,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1796788492, now seen corresponding path program 1 times [2023-08-30 22:49:47,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:49:47,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837733296] [2023-08-30 22:49:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:49:47,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:49:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:49:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:49:47,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:49:47,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837733296] [2023-08-30 22:49:47,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837733296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:49:47,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:49:47,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:49:47,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109581384] [2023-08-30 22:49:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:49:47,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:49:47,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:49:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:49:47,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:49:47,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 303 [2023-08-30 22:49:47,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:49:47,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 303 [2023-08-30 22:49:47,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:49:47,943 INFO L130 PetriNetUnfolder]: 953/1566 cut-off events. [2023-08-30 22:49:47,944 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2023-08-30 22:49:47,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 1566 events. 953/1566 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6650 event pairs, 659 based on Foata normal form. 56/1460 useless extension candidates. Maximal degree in co-relation 3214. Up to 1397 conditions per place. [2023-08-30 22:49:47,951 INFO L137 encePairwiseOnDemand]: 300/303 looper letters, 52 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-08-30 22:49:47,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 270 flow [2023-08-30 22:49:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:49:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:49:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-30 22:49:47,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412541254125413 [2023-08-30 22:49:47,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-30 22:49:47,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-30 22:49:47,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:49:47,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-30 22:49:47,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,957 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 492 transitions. [2023-08-30 22:49:47,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 270 flow [2023-08-30 22:49:47,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:49:47,959 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-08-30 22:49:47,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, 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} [2023-08-30 22:49:47,960 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-08-30 22:49:47,960 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-08-30 22:49:47,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:47,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:49:47,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:49:47,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:49:47,962 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:49:47,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:49:47,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1638577751, now seen corresponding path program 1 times [2023-08-30 22:49:47,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:49:47,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787458764] [2023-08-30 22:49:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:49:47,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:49:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:49:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:49:48,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:49:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787458764] [2023-08-30 22:49:48,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787458764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:49:48,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265497278] [2023-08-30 22:49:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:49:48,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:49:48,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:49:48,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:49:48,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 22:49:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:49:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 22:49:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:49:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:49:48,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:49:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:49:48,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265497278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:49:48,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:49:48,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 22:49:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043373219] [2023-08-30 22:49:48,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:49:48,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 22:49:48,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:49:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 22:49:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 22:49:48,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 303 [2023-08-30 22:49:48,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 147.375) internal successors, (1179), 8 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:48,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:49:48,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 303 [2023-08-30 22:49:48,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:49:48,891 INFO L130 PetriNetUnfolder]: 1986/3223 cut-off events. [2023-08-30 22:49:48,891 INFO L131 PetriNetUnfolder]: For 1186/1186 co-relation queries the response was YES. [2023-08-30 22:49:48,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7663 conditions, 3223 events. 1986/3223 cut-off events. For 1186/1186 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 15001 event pairs, 399 based on Foata normal form. 52/2955 useless extension candidates. Maximal degree in co-relation 7184. Up to 909 conditions per place. [2023-08-30 22:49:48,907 INFO L137 encePairwiseOnDemand]: 297/303 looper letters, 173 selfloop transitions, 22 changer transitions 0/195 dead transitions. [2023-08-30 22:49:48,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 195 transitions, 934 flow [2023-08-30 22:49:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 22:49:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 22:49:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1634 transitions. [2023-08-30 22:49:48,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392739273927393 [2023-08-30 22:49:48,912 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1634 transitions. [2023-08-30 22:49:48,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1634 transitions. [2023-08-30 22:49:48,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:49:48,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1634 transitions. [2023-08-30 22:49:48,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 163.4) internal successors, (1634), 10 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:48,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 303.0) internal successors, (3333), 11 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:48,923 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 303.0) internal successors, (3333), 11 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:48,923 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1634 transitions. [2023-08-30 22:49:48,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 195 transitions, 934 flow [2023-08-30 22:49:48,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 195 transitions, 921 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:49:48,930 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-08-30 22:49:48,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, 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} [2023-08-30 22:49:48,931 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-08-30 22:49:48,931 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-08-30 22:49:48,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.375) internal successors, (1179), 8 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:48,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:49:48,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:49:48,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 22:49:49,138 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 [2023-08-30 22:49:49,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:49:49,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:49:49,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1568042570, now seen corresponding path program 1 times [2023-08-30 22:49:49,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:49:49,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902884003] [2023-08-30 22:49:49,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:49:49,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:49:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:49:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:49:49,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:49:49,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902884003] [2023-08-30 22:49:49,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902884003] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:49:49,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:49:49,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:49:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161312801] [2023-08-30 22:49:49,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:49:49,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:49:49,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:49:49,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:49:49,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:49:49,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 303 [2023-08-30 22:49:49,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:49,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:49:49,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 303 [2023-08-30 22:49:49,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:49:49,396 INFO L130 PetriNetUnfolder]: 606/1135 cut-off events. [2023-08-30 22:49:49,396 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2023-08-30 22:49:49,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2770 conditions, 1135 events. 606/1135 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4845 event pairs, 98 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 2292. Up to 850 conditions per place. [2023-08-30 22:49:49,402 INFO L137 encePairwiseOnDemand]: 298/303 looper letters, 47 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-08-30 22:49:49,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 331 flow [2023-08-30 22:49:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:49:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:49:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-30 22:49:49,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258525852585259 [2023-08-30 22:49:49,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-30 22:49:49,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-30 22:49:49,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:49:49,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-30 22:49:49,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:49,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:49,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:49,409 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 478 transitions. [2023-08-30 22:49:49,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 331 flow [2023-08-30 22:49:49,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 319 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 22:49:49,413 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-08-30 22:49:49,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, 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} [2023-08-30 22:49:49,417 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-08-30 22:49:49,417 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-08-30 22:49:49,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:49,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:49:49,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:49:49,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 22:49:49,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:49:49,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:49:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash 321710418, now seen corresponding path program 1 times [2023-08-30 22:49:49,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:49:49,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137739904] [2023-08-30 22:49:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:49:49,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:49:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:49:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:49:49,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:49:49,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137739904] [2023-08-30 22:49:49,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137739904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:49:49,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:49:49,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:49:49,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312476173] [2023-08-30 22:49:49,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:49:49,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:49:49,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:49:49,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:49:49,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:49:49,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 303 [2023-08-30 22:49:49,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:49,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:49:49,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 303 [2023-08-30 22:49:49,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:49:49,775 INFO L130 PetriNetUnfolder]: 718/1317 cut-off events. [2023-08-30 22:49:49,776 INFO L131 PetriNetUnfolder]: For 378/378 co-relation queries the response was YES. [2023-08-30 22:49:49,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3320 conditions, 1317 events. 718/1317 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5602 event pairs, 236 based on Foata normal form. 18/1335 useless extension candidates. Maximal degree in co-relation 2798. Up to 702 conditions per place. [2023-08-30 22:49:49,782 INFO L137 encePairwiseOnDemand]: 297/303 looper letters, 81 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2023-08-30 22:49:49,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 95 transitions, 534 flow [2023-08-30 22:49:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:49:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:49:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 953 transitions. [2023-08-30 22:49:49,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242024202420242 [2023-08-30 22:49:49,786 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 953 transitions. [2023-08-30 22:49:49,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 953 transitions. [2023-08-30 22:49:49,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:49:49,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 953 transitions. [2023-08-30 22:49:49,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.83333333333334) internal successors, (953), 6 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:49,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:49,792 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:49,792 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 6 states and 953 transitions. [2023-08-30 22:49:49,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 95 transitions, 534 flow [2023-08-30 22:49:49,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 95 transitions, 521 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:49:49,796 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 271 flow [2023-08-30 22:49:49,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-30 22:49:49,797 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 21 predicate places. [2023-08-30 22:49:49,797 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 271 flow [2023-08-30 22:49:49,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:49,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:49:49,798 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] [2023-08-30 22:49:49,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 22:49:49,798 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:49:49,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:49:49,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2070456889, now seen corresponding path program 1 times [2023-08-30 22:49:49,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:49:49,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745483013] [2023-08-30 22:49:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:49:49,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:49:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:49:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:49:50,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:49:50,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745483013] [2023-08-30 22:49:50,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745483013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:49:50,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:49:50,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 22:49:50,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614573797] [2023-08-30 22:49:50,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:49:50,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 22:49:50,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:49:50,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 22:49:50,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-08-30 22:49:52,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 303 [2023-08-30 22:49:52,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 271 flow. Second operand has 16 states, 16 states have (on average 119.375) internal successors, (1910), 16 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:52,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:49:52,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 303 [2023-08-30 22:49:52,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:49:53,165 INFO L130 PetriNetUnfolder]: 1006/1842 cut-off events. [2023-08-30 22:49:53,166 INFO L131 PetriNetUnfolder]: For 1064/1064 co-relation queries the response was YES. [2023-08-30 22:49:53,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4739 conditions, 1842 events. 1006/1842 cut-off events. For 1064/1064 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8702 event pairs, 306 based on Foata normal form. 4/1828 useless extension candidates. Maximal degree in co-relation 3526. Up to 1181 conditions per place. [2023-08-30 22:49:53,176 INFO L137 encePairwiseOnDemand]: 286/303 looper letters, 136 selfloop transitions, 23 changer transitions 3/162 dead transitions. [2023-08-30 22:49:53,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 162 transitions, 917 flow [2023-08-30 22:49:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 22:49:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 22:49:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1800 transitions. [2023-08-30 22:49:53,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243281471004243 [2023-08-30 22:49:53,182 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1800 transitions. [2023-08-30 22:49:53,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1800 transitions. [2023-08-30 22:49:53,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:49:53,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1800 transitions. [2023-08-30 22:49:53,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 128.57142857142858) internal successors, (1800), 14 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:53,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:53,193 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:53,193 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 271 flow. Second operand 14 states and 1800 transitions. [2023-08-30 22:49:53,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 162 transitions, 917 flow [2023-08-30 22:49:53,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 162 transitions, 894 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 22:49:53,200 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 465 flow [2023-08-30 22:49:53,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=465, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2023-08-30 22:49:53,201 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2023-08-30 22:49:53,201 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 465 flow [2023-08-30 22:49:53,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 119.375) internal successors, (1910), 16 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:53,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:49:53,202 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] [2023-08-30 22:49:53,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 22:49:53,202 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:49:53,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:49:53,203 INFO L85 PathProgramCache]: Analyzing trace with hash -734851743, now seen corresponding path program 2 times [2023-08-30 22:49:53,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:49:53,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013411434] [2023-08-30 22:49:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:49:53,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:49:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:49:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:49:54,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:49:54,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013411434] [2023-08-30 22:49:54,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013411434] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:49:54,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:49:54,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 22:49:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317243734] [2023-08-30 22:49:54,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:49:54,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 22:49:54,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:49:54,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 22:49:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-30 22:49:55,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 303 [2023-08-30 22:49:55,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 465 flow. Second operand has 16 states, 16 states have (on average 119.375) internal successors, (1910), 16 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:55,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:49:55,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 303 [2023-08-30 22:49:55,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:49:56,409 INFO L130 PetriNetUnfolder]: 1244/2276 cut-off events. [2023-08-30 22:49:56,409 INFO L131 PetriNetUnfolder]: For 1796/1796 co-relation queries the response was YES. [2023-08-30 22:49:56,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6565 conditions, 2276 events. 1244/2276 cut-off events. For 1796/1796 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 10700 event pairs, 350 based on Foata normal form. 4/2256 useless extension candidates. Maximal degree in co-relation 4346. Up to 1108 conditions per place. [2023-08-30 22:49:56,422 INFO L137 encePairwiseOnDemand]: 287/303 looper letters, 138 selfloop transitions, 36 changer transitions 3/177 dead transitions. [2023-08-30 22:49:56,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 177 transitions, 1195 flow [2023-08-30 22:49:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 22:49:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 22:49:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1800 transitions. [2023-08-30 22:49:56,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243281471004243 [2023-08-30 22:49:56,428 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1800 transitions. [2023-08-30 22:49:56,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1800 transitions. [2023-08-30 22:49:56,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:49:56,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1800 transitions. [2023-08-30 22:49:56,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 128.57142857142858) internal successors, (1800), 14 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:56,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:56,439 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:56,439 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 465 flow. Second operand 14 states and 1800 transitions. [2023-08-30 22:49:56,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 177 transitions, 1195 flow [2023-08-30 22:49:56,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 177 transitions, 1191 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 22:49:56,448 INFO L231 Difference]: Finished difference. Result has 100 places, 86 transitions, 730 flow [2023-08-30 22:49:56,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=730, PETRI_PLACES=100, PETRI_TRANSITIONS=86} [2023-08-30 22:49:56,449 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 65 predicate places. [2023-08-30 22:49:56,449 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 86 transitions, 730 flow [2023-08-30 22:49:56,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 119.375) internal successors, (1910), 16 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:49:56,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:49:56,450 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] [2023-08-30 22:49:56,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 22:49:56,451 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:49:56,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:49:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2144319276, now seen corresponding path program 1 times [2023-08-30 22:49:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:49:56,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067696287] [2023-08-30 22:49:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:49:56,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:49:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:49:56,478 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:49:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:49:56,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:49:56,527 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:49:56,528 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-30 22:49:56,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-30 22:49:56,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-30 22:49:56,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 22:49:56,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 22:49:56,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 22:49:56,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 22:49:56,532 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:49:56,537 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 22:49:56,537 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 22:49:56,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 10:49:56 BasicIcfg [2023-08-30 22:49:56,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 22:49:56,596 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 22:49:56,596 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 22:49:56,597 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 22:49:56,597 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:49:42" (3/4) ... [2023-08-30 22:49:56,599 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-08-30 22:49:56,668 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 22:49:56,668 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 22:49:56,669 INFO L158 Benchmark]: Toolchain (without parser) took 15225.14ms. Allocated memory was 71.3MB in the beginning and 249.6MB in the end (delta: 178.3MB). Free memory was 45.1MB in the beginning and 124.4MB in the end (delta: -79.2MB). Peak memory consumption was 99.9MB. Max. memory is 16.1GB. [2023-08-30 22:49:56,669 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 71.3MB. Free memory is still 49.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 22:49:56,669 INFO L158 Benchmark]: CACSL2BoogieTranslator took 552.30ms. Allocated memory was 71.3MB in the beginning and 88.1MB in the end (delta: 16.8MB). Free memory was 45.0MB in the beginning and 53.9MB in the end (delta: -8.9MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2023-08-30 22:49:56,670 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.88ms. Allocated memory is still 88.1MB. Free memory was 53.9MB in the beginning and 51.4MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 22:49:56,670 INFO L158 Benchmark]: Boogie Preprocessor took 58.10ms. Allocated memory is still 88.1MB. Free memory was 51.4MB in the beginning and 49.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 22:49:56,670 INFO L158 Benchmark]: RCFGBuilder took 563.67ms. Allocated memory is still 88.1MB. Free memory was 49.3MB in the beginning and 62.9MB in the end (delta: -13.6MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2023-08-30 22:49:56,670 INFO L158 Benchmark]: TraceAbstraction took 13916.83ms. Allocated memory was 88.1MB in the beginning and 249.6MB in the end (delta: 161.5MB). Free memory was 62.4MB in the beginning and 133.8MB in the end (delta: -71.4MB). Peak memory consumption was 89.6MB. Max. memory is 16.1GB. [2023-08-30 22:49:56,671 INFO L158 Benchmark]: Witness Printer took 72.05ms. Allocated memory is still 249.6MB. Free memory was 133.8MB in the beginning and 124.4MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 22:49:56,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 71.3MB. Free memory is still 49.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 552.30ms. Allocated memory was 71.3MB in the beginning and 88.1MB in the end (delta: 16.8MB). Free memory was 45.0MB in the beginning and 53.9MB in the end (delta: -8.9MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.88ms. Allocated memory is still 88.1MB. Free memory was 53.9MB in the beginning and 51.4MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.10ms. Allocated memory is still 88.1MB. Free memory was 51.4MB in the beginning and 49.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 563.67ms. Allocated memory is still 88.1MB. Free memory was 49.3MB in the beginning and 62.9MB in the end (delta: -13.6MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. * TraceAbstraction took 13916.83ms. Allocated memory was 88.1MB in the beginning and 249.6MB in the end (delta: 161.5MB). Free memory was 62.4MB in the beginning and 133.8MB in the end (delta: -71.4MB). Peak memory consumption was 89.6MB. Max. memory is 16.1GB. * Witness Printer took 72.05ms. Allocated memory is still 249.6MB. Free memory was 133.8MB in the beginning and 124.4MB in the end (delta: 9.4MB). 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: 3.7s, 148 PlacesBefore, 35 PlacesAfterwards, 151 TransitionsBefore, 33 TransitionsAfterwards, 7334 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 84 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 141 TotalNumberOfCompositions, 9688 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6870, independent: 6685, independent conditional: 0, independent unconditional: 6685, dependent: 185, dependent conditional: 0, dependent unconditional: 185, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4087, independent: 4036, independent conditional: 0, independent unconditional: 4036, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6870, independent: 2649, independent conditional: 0, independent unconditional: 2649, dependent: 134, dependent conditional: 0, dependent unconditional: 134, unknown: 4087, unknown conditional: 0, unknown unconditional: 4087] , Statistics on independence cache: Total cache size (in pairs): 168, Positive cache size: 151, Positive conditional cache size: 0, Positive unconditional cache size: 151, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 941]: 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[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={9:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={9:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=4, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=4, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: 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: 1024]: 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: 941]: 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, 254 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: 13.7s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1695 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1521 mSDsluCounter, 3211 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3207 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8861 IncrementalHoareTripleChecker+Invalid, 8914 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 4 mSDtfsCounter, 8861 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=730occurred in iteration=8, InterpolantAutomatonStates: 56, 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, 2.3s InterpolantComputationTime, 158 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 136 ConstructedInterpolants, 0 QuantifiedInterpolants, 1281 SizeOfPredicates, 1 NumberOfNonLiveVariables, 193 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 3/9 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! [2023-08-30 22:49:56,702 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