./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:13:41,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:13:41,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:13:41,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:13:41,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:13:41,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:13:41,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:13:41,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:13:41,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:13:41,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:13:41,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:13:41,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:13:41,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:13:41,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:13:41,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:13:41,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:13:41,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:13:41,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:13:41,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:13:41,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:13:41,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:13:41,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:13:41,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:13:41,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:13:41,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:13:41,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:13:41,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:13:41,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:13:41,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:13:41,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:13:41,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:13:41,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:13:41,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:13:41,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:13:41,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:13:41,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:13:41,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:13:41,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:13:41,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:13:41,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:13:41,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:13:41,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:13:41,336 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:13:41,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:13:41,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:13:41,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:13:41,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:13:41,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:13:41,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:13:41,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:13:41,340 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:13:41,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:13:41,341 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:13:41,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:13:41,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:13:41,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:13:41,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:13:41,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:13:41,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:13:41,343 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:13:41,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:13:41,343 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:13:41,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:13:41,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:13:41,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:13:41,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:13:41,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:13:41,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:13:41,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:13:41,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:13:41,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:13:41,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:13:41,345 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:13:41,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:13:41,346 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:13:41,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:13:41,347 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:13:41,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:13:41,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:13:41,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:13:41,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:13:41,705 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:13:41,705 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:13:41,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-08-31 00:13:42,891 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:13:43,171 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:13:43,172 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-08-31 00:13:43,183 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c93df19/2ff21648def1438e92bc902b7771ff02/FLAG1775830d2 [2023-08-31 00:13:43,196 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c93df19/2ff21648def1438e92bc902b7771ff02 [2023-08-31 00:13:43,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:13:43,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:13:43,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:13:43,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:13:43,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:13:43,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722ff422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43, skipping insertion in model container [2023-08-31 00:13:43,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:13:43,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:13:43,509 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2023-08-31 00:13:43,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:13:43,549 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:13:43,593 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2023-08-31 00:13:43,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:13:43,664 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:13:43,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43 WrapperNode [2023-08-31 00:13:43,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:13:43,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:13:43,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:13:43,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:13:43,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,722 INFO L138 Inliner]: procedures = 170, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-08-31 00:13:43,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:13:43,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:13:43,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:13:43,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:13:43,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,744 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:13:43,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:13:43,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:13:43,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:13:43,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (1/1) ... [2023-08-31 00:13:43,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:13:43,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:13:43,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:13:43,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:13:43,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:13:43,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:13:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:13:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:13:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:13:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:13:43,837 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:13:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:13:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:13:43,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:13:43,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:13:43,839 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:13:44,016 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:13:44,018 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:13:44,310 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:13:44,319 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:13:44,319 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-31 00:13:44,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:13:44 BoogieIcfgContainer [2023-08-31 00:13:44,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:13:44,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:13:44,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:13:44,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:13:44,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:13:43" (1/3) ... [2023-08-31 00:13:44,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dc3a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:13:44, skipping insertion in model container [2023-08-31 00:13:44,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:13:43" (2/3) ... [2023-08-31 00:13:44,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dc3a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:13:44, skipping insertion in model container [2023-08-31 00:13:44,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:13:44" (3/3) ... [2023-08-31 00:13:44,330 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2023-08-31 00:13:44,337 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:13:44,345 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:13:44,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:13:44,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:13:44,418 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:13:44,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 115 transitions, 238 flow [2023-08-31 00:13:44,538 INFO L130 PetriNetUnfolder]: 17/150 cut-off events. [2023-08-31 00:13:44,539 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:13:44,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 150 events. 17/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 350 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-31 00:13:44,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 115 transitions, 238 flow [2023-08-31 00:13:44,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 110 transitions, 225 flow [2023-08-31 00:13:44,554 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:13:44,572 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 110 transitions, 225 flow [2023-08-31 00:13:44,580 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 110 transitions, 225 flow [2023-08-31 00:13:44,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 110 transitions, 225 flow [2023-08-31 00:13:44,628 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-08-31 00:13:44,630 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:13:44,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 16/145 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 334 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-31 00:13:44,635 INFO L119 LiptonReduction]: Number of co-enabled transitions 2706 [2023-08-31 00:13:47,715 INFO L134 LiptonReduction]: Checked pairs total: 4759 [2023-08-31 00:13:47,715 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-31 00:13:47,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:13:47,733 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;@668429c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:13:47,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:13:47,737 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-31 00:13:47,737 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:13:47,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:13:47,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:13:47,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:13:47,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:13:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash 13525794, now seen corresponding path program 1 times [2023-08-31 00:13:47,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:13:47,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320290404] [2023-08-31 00:13:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:13:47,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:13:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:13:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:13:47,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:13:47,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320290404] [2023-08-31 00:13:47,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320290404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:13:47,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:13:47,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:13:47,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239370263] [2023-08-31 00:13:47,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:13:47,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:13:47,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:13:47,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:13:47,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:13:48,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 208 [2023-08-31 00:13:48,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:48,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:13:48,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 208 [2023-08-31 00:13:48,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:13:48,091 INFO L130 PetriNetUnfolder]: 80/204 cut-off events. [2023-08-31 00:13:48,091 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:13:48,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 204 events. 80/204 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 873 event pairs, 0 based on Foata normal form. 9/191 useless extension candidates. Maximal degree in co-relation 368. Up to 169 conditions per place. [2023-08-31 00:13:48,094 INFO L137 encePairwiseOnDemand]: 196/208 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-08-31 00:13:48,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-08-31 00:13:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:13:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:13:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-31 00:13:48,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-08-31 00:13:48,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-31 00:13:48,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-31 00:13:48,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:13:48,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-31 00:13:48,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:48,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:48,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:48,126 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 338 transitions. [2023-08-31 00:13:48,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-08-31 00:13:48,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:13:48,130 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-08-31 00:13:48,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-31 00:13:48,135 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-31 00:13:48,135 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-08-31 00:13:48,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:48,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:13:48,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:13:48,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:13:48,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:13:48,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:13:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash 104994420, now seen corresponding path program 1 times [2023-08-31 00:13:48,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:13:48,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719605309] [2023-08-31 00:13:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:13:48,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:13:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:13:48,165 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:13:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:13:48,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:13:48,198 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:13:48,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:13:48,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:13:48,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:13:48,201 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:13:48,203 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:13:48,203 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:13:48,221 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:13:48,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2023-08-31 00:13:48,252 INFO L130 PetriNetUnfolder]: 31/244 cut-off events. [2023-08-31 00:13:48,252 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:13:48,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 244 events. 31/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 724 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-31 00:13:48,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 150 transitions, 318 flow [2023-08-31 00:13:48,257 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 150 transitions, 318 flow [2023-08-31 00:13:48,257 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:13:48,258 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 150 transitions, 318 flow [2023-08-31 00:13:48,258 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 150 transitions, 318 flow [2023-08-31 00:13:48,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2023-08-31 00:13:48,297 INFO L130 PetriNetUnfolder]: 31/244 cut-off events. [2023-08-31 00:13:48,297 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:13:48,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 244 events. 31/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 724 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-31 00:13:48,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-08-31 00:13:51,191 INFO L134 LiptonReduction]: Checked pairs total: 16492 [2023-08-31 00:13:51,192 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-31 00:13:51,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:13:51,195 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;@668429c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:13:51,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:13:51,197 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-31 00:13:51,197 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:13:51,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:13:51,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:13:51,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:13:51,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:13:51,198 INFO L85 PathProgramCache]: Analyzing trace with hash 22730768, now seen corresponding path program 1 times [2023-08-31 00:13:51,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:13:51,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385545052] [2023-08-31 00:13:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:13:51,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:13:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:13:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:13:51,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:13:51,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385545052] [2023-08-31 00:13:51,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385545052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:13:51,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:13:51,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:13:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861080299] [2023-08-31 00:13:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:13:51,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:13:51,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:13:51,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:13:51,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:13:51,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 264 [2023-08-31 00:13:51,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:51,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:13:51,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 264 [2023-08-31 00:13:51,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:13:51,610 INFO L130 PetriNetUnfolder]: 1642/2913 cut-off events. [2023-08-31 00:13:51,610 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:13:51,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2913 events. 1642/2913 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 17119 event pairs, 752 based on Foata normal form. 428/3024 useless extension candidates. Maximal degree in co-relation 585. Up to 2673 conditions per place. [2023-08-31 00:13:51,622 INFO L137 encePairwiseOnDemand]: 247/264 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2023-08-31 00:13:51,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-08-31 00:13:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:13:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:13:51,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-31 00:13:51,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492424242424242 [2023-08-31 00:13:51,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-31 00:13:51,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-31 00:13:51,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:13:51,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-31 00:13:51,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:51,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:51,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:51,637 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 435 transitions. [2023-08-31 00:13:51,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-08-31 00:13:51,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:13:51,639 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2023-08-31 00:13:51,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-31 00:13:51,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-31 00:13:51,641 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2023-08-31 00:13:51,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:51,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:13:51,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:13:51,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:13:51,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:13:51,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:13:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash -667154092, now seen corresponding path program 1 times [2023-08-31 00:13:51,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:13:51,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660732068] [2023-08-31 00:13:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:13:51,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:13:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:13:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:13:51,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:13:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660732068] [2023-08-31 00:13:51,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660732068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:13:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976265896] [2023-08-31 00:13:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:13:51,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:13:51,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:13:51,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:13:51,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:13:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:13:51,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:13:51,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:13:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:13:51,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:13:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:13:51,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976265896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:13:51,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:13:51,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:13:51,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127427153] [2023-08-31 00:13:51,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:13:51,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:13:51,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:13:51,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:13:51,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:13:51,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 264 [2023-08-31 00:13:51,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:51,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:13:51,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 264 [2023-08-31 00:13:51,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:13:52,091 INFO L130 PetriNetUnfolder]: 376/769 cut-off events. [2023-08-31 00:13:52,092 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2023-08-31 00:13:52,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3946 event pairs, 0 based on Foata normal form. 90/858 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2023-08-31 00:13:52,097 INFO L137 encePairwiseOnDemand]: 261/264 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-31 00:13:52,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2023-08-31 00:13:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:13:52,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:13:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-08-31 00:13:52,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037878787878788 [2023-08-31 00:13:52,100 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-08-31 00:13:52,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-08-31 00:13:52,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:13:52,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-08-31 00:13:52,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:52,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:52,111 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:52,111 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 5 states and 665 transitions. [2023-08-31 00:13:52,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2023-08-31 00:13:52,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:13:52,115 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-31 00:13:52,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-31 00:13:52,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-08-31 00:13:52,118 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-31 00:13:52,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:52,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:13:52,119 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:13:52,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:13:52,324 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 [2023-08-31 00:13:52,324 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:13:52,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:13:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1531901060, now seen corresponding path program 1 times [2023-08-31 00:13:52,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:13:52,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821142145] [2023-08-31 00:13:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:13:52,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:13:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:13:52,345 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:13:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:13:52,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:13:52,371 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:13:52,372 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:13:52,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:13:52,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:13:52,372 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:13:52,373 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:13:52,373 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:13:52,406 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:13:52,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2023-08-31 00:13:52,473 INFO L130 PetriNetUnfolder]: 50/369 cut-off events. [2023-08-31 00:13:52,474 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:13:52,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 369 events. 50/369 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2023-08-31 00:13:52,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 400 flow [2023-08-31 00:13:52,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 400 flow [2023-08-31 00:13:52,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:13:52,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 185 transitions, 400 flow [2023-08-31 00:13:52,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 185 transitions, 400 flow [2023-08-31 00:13:52,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2023-08-31 00:13:52,522 INFO L130 PetriNetUnfolder]: 50/369 cut-off events. [2023-08-31 00:13:52,522 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:13:52,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 369 events. 50/369 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2023-08-31 00:13:52,539 INFO L119 LiptonReduction]: Number of co-enabled transitions 16038 [2023-08-31 00:13:55,662 INFO L134 LiptonReduction]: Checked pairs total: 34965 [2023-08-31 00:13:55,663 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-31 00:13:55,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:13:55,665 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;@668429c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:13:55,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:13:55,667 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-31 00:13:55,667 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:13:55,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:13:55,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:13:55,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:13:55,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:13:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash 33657601, now seen corresponding path program 1 times [2023-08-31 00:13:55,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:13:55,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601766910] [2023-08-31 00:13:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:13:55,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:13:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:13:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:13:55,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:13:55,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601766910] [2023-08-31 00:13:55,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601766910] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:13:55,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:13:55,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:13:55,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066701650] [2023-08-31 00:13:55,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:13:55,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:13:55,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:13:55,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:13:55,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:13:55,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 320 [2023-08-31 00:13:55,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:55,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:13:55,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 320 [2023-08-31 00:13:55,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:13:59,308 INFO L130 PetriNetUnfolder]: 32280/46608 cut-off events. [2023-08-31 00:13:59,308 INFO L131 PetriNetUnfolder]: For 1321/1321 co-relation queries the response was YES. [2023-08-31 00:13:59,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92837 conditions, 46608 events. 32280/46608 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 303146 event pairs, 21006 based on Foata normal form. 5103/47987 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-08-31 00:13:59,481 INFO L137 encePairwiseOnDemand]: 297/320 looper letters, 44 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2023-08-31 00:13:59,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2023-08-31 00:13:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:13:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:13:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-31 00:13:59,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572916666666666 [2023-08-31 00:13:59,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-31 00:13:59,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-31 00:13:59,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:13:59,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-31 00:13:59,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:59,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:59,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:59,488 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 535 transitions. [2023-08-31 00:13:59,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2023-08-31 00:13:59,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:13:59,493 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2023-08-31 00:13:59,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-31 00:13:59,496 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-31 00:13:59,496 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2023-08-31 00:13:59,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:59,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:13:59,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:13:59,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 00:13:59,497 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:13:59,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:13:59,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1400530544, now seen corresponding path program 1 times [2023-08-31 00:13:59,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:13:59,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872485631] [2023-08-31 00:13:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:13:59,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:13:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:13:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:13:59,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:13:59,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872485631] [2023-08-31 00:13:59,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872485631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:13:59,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206130306] [2023-08-31 00:13:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:13:59,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:13:59,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:13:59,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:13:59,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:13:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:13:59,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:13:59,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:13:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:13:59,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:13:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:13:59,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206130306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:13:59,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:13:59,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:13:59,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954760220] [2023-08-31 00:13:59,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:13:59,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:13:59,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:13:59,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:13:59,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:13:59,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 320 [2023-08-31 00:13:59,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:13:59,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:13:59,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 320 [2023-08-31 00:13:59,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:00,582 INFO L130 PetriNetUnfolder]: 7582/12187 cut-off events. [2023-08-31 00:14:00,583 INFO L131 PetriNetUnfolder]: For 4374/4374 co-relation queries the response was YES. [2023-08-31 00:14:00,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 12187 events. 7582/12187 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 81276 event pairs, 0 based on Foata normal form. 1098/13284 useless extension candidates. Maximal degree in co-relation 3138. Up to 7322 conditions per place. [2023-08-31 00:14:00,640 INFO L137 encePairwiseOnDemand]: 317/320 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2023-08-31 00:14:00,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 411 flow [2023-08-31 00:14:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:14:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:14:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 994 transitions. [2023-08-31 00:14:00,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177083333333333 [2023-08-31 00:14:00,644 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 994 transitions. [2023-08-31 00:14:00,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 994 transitions. [2023-08-31 00:14:00,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:00,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 994 transitions. [2023-08-31 00:14:00,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 165.66666666666666) internal successors, (994), 6 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:00,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:00,652 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:00,652 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 994 transitions. [2023-08-31 00:14:00,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 411 flow [2023-08-31 00:14:00,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 403 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 00:14:00,663 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-31 00:14:00,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-31 00:14:00,664 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-08-31 00:14:00,664 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-31 00:14:00,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:00,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:00,665 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 00:14:00,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 00:14:00,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-31 00:14:00,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:00,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash 666088430, now seen corresponding path program 1 times [2023-08-31 00:14:00,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:00,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028500835] [2023-08-31 00:14:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:00,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:00,891 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:14:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:00,924 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:14:00,924 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:14:00,925 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:14:00,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:14:00,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 00:14:00,926 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:14:00,927 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:14:00,927 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:14:00,960 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:14:00,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2023-08-31 00:14:01,031 INFO L130 PetriNetUnfolder]: 81/558 cut-off events. [2023-08-31 00:14:01,032 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:14:01,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 558 events. 81/558 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2119 event pairs, 6 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 389. Up to 32 conditions per place. [2023-08-31 00:14:01,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 220 transitions, 484 flow [2023-08-31 00:14:01,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 220 transitions, 484 flow [2023-08-31 00:14:01,044 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:01,044 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 196 places, 220 transitions, 484 flow [2023-08-31 00:14:01,044 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 196 places, 220 transitions, 484 flow [2023-08-31 00:14:01,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2023-08-31 00:14:01,107 INFO L130 PetriNetUnfolder]: 81/558 cut-off events. [2023-08-31 00:14:01,107 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:14:01,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 558 events. 81/558 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2119 event pairs, 6 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 389. Up to 32 conditions per place. [2023-08-31 00:14:01,130 INFO L119 LiptonReduction]: Number of co-enabled transitions 26136 [2023-08-31 00:14:04,415 INFO L134 LiptonReduction]: Checked pairs total: 59200 [2023-08-31 00:14:04,415 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-31 00:14:04,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:14:04,417 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;@668429c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:14:04,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:14:04,419 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-31 00:14:04,419 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:14:04,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:04,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:14:04,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:04,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash 46247945, now seen corresponding path program 1 times [2023-08-31 00:14:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:04,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333962402] [2023-08-31 00:14:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:04,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:04,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333962402] [2023-08-31 00:14:04,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333962402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:14:04,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:14:04,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:14:04,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700719300] [2023-08-31 00:14:04,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:14:04,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:14:04,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:04,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:14:04,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:14:04,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 374 [2023-08-31 00:14:04,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:04,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:04,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 374 [2023-08-31 00:14:04,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:40,868 INFO L130 PetriNetUnfolder]: 411276/561314 cut-off events. [2023-08-31 00:14:40,869 INFO L131 PetriNetUnfolder]: For 20950/20950 co-relation queries the response was YES. [2023-08-31 00:14:41,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108130 conditions, 561314 events. 411276/561314 cut-off events. For 20950/20950 co-relation queries the response was YES. Maximal size of possible extension queue 10564. Compared 4250072 event pairs, 302497 based on Foata normal form. 85320/609495 useless extension candidates. Maximal degree in co-relation 94407. Up to 535317 conditions per place. [2023-08-31 00:14:42,822 INFO L137 encePairwiseOnDemand]: 345/374 looper letters, 54 selfloop transitions, 2 changer transitions 11/78 dead transitions. [2023-08-31 00:14:42,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 332 flow [2023-08-31 00:14:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:14:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:14:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-31 00:14:42,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641711229946524 [2023-08-31 00:14:42,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-31 00:14:42,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-31 00:14:42,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:42,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-31 00:14:42,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:42,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:42,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:42,830 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 633 transitions. [2023-08-31 00:14:42,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 332 flow [2023-08-31 00:14:42,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:14:42,836 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 156 flow [2023-08-31 00:14:42,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-08-31 00:14:42,837 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-31 00:14:42,837 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 156 flow [2023-08-31 00:14:42,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:42,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:42,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:14:42,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 00:14:42,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:42,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash 245542397, now seen corresponding path program 1 times [2023-08-31 00:14:42,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:42,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119485535] [2023-08-31 00:14:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:42,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:42,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:14:42,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119485535] [2023-08-31 00:14:42,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119485535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:14:42,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127005158] [2023-08-31 00:14:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:42,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:14:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:14:42,886 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:14:42,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:14:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:14:42,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:14:42,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:14:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:42,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:14:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:14:42,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127005158] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:14:42,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:14:42,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:14:42,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699729395] [2023-08-31 00:14:42,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:14:43,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:14:43,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:14:43,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:14:43,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:14:43,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 374 [2023-08-31 00:14:43,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:43,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:14:43,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 374 [2023-08-31 00:14:43,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:14:57,434 INFO L130 PetriNetUnfolder]: 191482/256657 cut-off events. [2023-08-31 00:14:57,434 INFO L131 PetriNetUnfolder]: For 22240/22240 co-relation queries the response was YES. [2023-08-31 00:14:57,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533262 conditions, 256657 events. 191482/256657 cut-off events. For 22240/22240 co-relation queries the response was YES. Maximal size of possible extension queue 5470. Compared 1791623 event pairs, 7920 based on Foata normal form. 1110/257767 useless extension candidates. Maximal degree in co-relation 54456. Up to 163477 conditions per place. [2023-08-31 00:14:58,778 INFO L137 encePairwiseOnDemand]: 370/374 looper letters, 136 selfloop transitions, 6 changer transitions 0/153 dead transitions. [2023-08-31 00:14:58,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 153 transitions, 636 flow [2023-08-31 00:14:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:14:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:14:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1207 transitions. [2023-08-31 00:14:58,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2023-08-31 00:14:58,781 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1207 transitions. [2023-08-31 00:14:58,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1207 transitions. [2023-08-31 00:14:58,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:14:58,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1207 transitions. [2023-08-31 00:14:58,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.16666666666666) internal successors, (1207), 6 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:58,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:58,789 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:58,789 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 156 flow. Second operand 6 states and 1207 transitions. [2023-08-31 00:14:58,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 153 transitions, 636 flow [2023-08-31 00:14:58,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 153 transitions, 622 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:14:58,810 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-31 00:14:58,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-31 00:14:58,811 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-31 00:14:58,811 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-31 00:14:58,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:14:58,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:14:58,812 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 00:14:58,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 00:14:59,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:14:59,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:14:59,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:14:59,017 INFO L85 PathProgramCache]: Analyzing trace with hash 849532596, now seen corresponding path program 1 times [2023-08-31 00:14:59,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:14:59,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105436223] [2023-08-31 00:14:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:14:59,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:14:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:59,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:14:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:14:59,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:14:59,055 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:14:59,055 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:14:59,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:14:59,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 00:14:59,056 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:14:59,057 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:14:59,057 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 00:14:59,086 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-31 00:14:59,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 570 flow [2023-08-31 00:14:59,164 INFO L130 PetriNetUnfolder]: 140/879 cut-off events. [2023-08-31 00:14:59,165 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:14:59,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 879 events. 140/879 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3954 event pairs, 23 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 603. Up to 80 conditions per place. [2023-08-31 00:14:59,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 255 transitions, 570 flow [2023-08-31 00:14:59,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 255 transitions, 570 flow [2023-08-31 00:14:59,178 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:14:59,178 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 255 transitions, 570 flow [2023-08-31 00:14:59,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 255 transitions, 570 flow [2023-08-31 00:14:59,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 570 flow [2023-08-31 00:14:59,246 INFO L130 PetriNetUnfolder]: 140/879 cut-off events. [2023-08-31 00:14:59,246 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:14:59,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 879 events. 140/879 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3954 event pairs, 23 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 603. Up to 80 conditions per place. [2023-08-31 00:14:59,280 INFO L119 LiptonReduction]: Number of co-enabled transitions 38610 [2023-08-31 00:15:02,642 INFO L134 LiptonReduction]: Checked pairs total: 92266 [2023-08-31 00:15:02,643 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-08-31 00:15:02,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:15:02,644 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;@668429c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:15:02,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:15:02,646 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-31 00:15:02,646 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:15:02,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:15:02,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:15:02,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:15:02,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:15:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash 60590683, now seen corresponding path program 1 times [2023-08-31 00:15:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:15:02,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164697994] [2023-08-31 00:15:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:15:02,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:15:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:15:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:15:02,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:15:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164697994] [2023-08-31 00:15:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164697994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:15:02,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:15:02,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:15:02,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291991804] [2023-08-31 00:15:02,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:15:02,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:15:02,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:15:02,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:15:02,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:15:02,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 431 [2023-08-31 00:15:02,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:15:02,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:15:02,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 431 [2023-08-31 00:15:02,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand