./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-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 ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 11:41:36,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 11:41:36,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 11:41:36,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 11:41:36,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 11:41:36,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 11:41:36,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 11:41:36,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 11:41:36,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 11:41:36,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 11:41:36,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 11:41:36,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 11:41:36,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 11:41:36,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 11:41:36,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 11:41:36,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 11:41:36,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 11:41:36,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 11:41:36,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 11:41:36,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 11:41:36,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 11:41:36,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 11:41:36,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 11:41:36,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 11:41:36,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 11:41:36,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 11:41:36,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 11:41:36,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 11:41:36,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 11:41:36,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 11:41:36,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 11:41:36,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 11:41:36,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 11:41:36,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 11:41:36,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 11:41:36,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 11:41:36,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 11:41:36,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 11:41:36,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 11:41:36,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 11:41:36,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 11:41:36,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 11:41:36,259 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 11:41:36,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 11:41:36,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 11:41:36,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 11:41:36,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 11:41:36,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 11:41:36,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 11:41:36,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 11:41:36,263 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 11:41:36,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 11:41:36,264 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 11:41:36,264 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 11:41:36,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 11:41:36,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 11:41:36,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 11:41:36,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 11:41:36,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 11:41:36,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 11:41:36,265 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 11:41:36,266 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 11:41:36,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 11:41:36,266 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 11:41:36,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 11:41:36,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 11:41:36,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 11:41:36,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 11:41:36,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 11:41:36,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 11:41:36,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 11:41:36,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 11:41:36,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 11:41:36,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 11:41:36,268 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 11:41:36,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 11:41:36,268 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 11:41:36,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 11:41:36,269 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 11:41:36,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 11:41:36,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 11:41:36,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 11:41:36,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 11:41:36,563 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 11:41:36,564 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 11:41:36,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-31 11:41:37,637 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 11:41:37,881 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 11:41:37,885 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-31 11:41:37,903 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5494b1cf0/c093c7f4f2144624a4c9e975b45ae0b1/FLAG33c5aa84b [2023-08-31 11:41:37,925 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5494b1cf0/c093c7f4f2144624a4c9e975b45ae0b1 [2023-08-31 11:41:37,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 11:41:37,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 11:41:37,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 11:41:37,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 11:41:37,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 11:41:37,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:41:37" (1/1) ... [2023-08-31 11:41:37,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c34194c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:37, skipping insertion in model container [2023-08-31 11:41:37,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:41:37" (1/1) ... [2023-08-31 11:41:37,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 11:41:38,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 11:41:38,327 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i[31164,31177] [2023-08-31 11:41:38,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 11:41:38,344 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 11:41:38,400 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i[31164,31177] [2023-08-31 11:41:38,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 11:41:38,443 INFO L208 MainTranslator]: Completed translation [2023-08-31 11:41:38,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38 WrapperNode [2023-08-31 11:41:38,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 11:41:38,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 11:41:38,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 11:41:38,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 11:41:38,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,509 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 320 [2023-08-31 11:41:38,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 11:41:38,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 11:41:38,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 11:41:38,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 11:41:38,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,547 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 11:41:38,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 11:41:38,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 11:41:38,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 11:41:38,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (1/1) ... [2023-08-31 11:41:38,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 11:41:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 11:41:38,582 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 11:41:38,606 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 11:41:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 11:41:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 11:41:38,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 11:41:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 11:41:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 11:41:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 11:41:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 11:41:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 11:41:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 11:41:38,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 11:41:38,624 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 11:41:38,833 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 11:41:38,836 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 11:41:39,408 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 11:41:39,675 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 11:41:39,675 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 11:41:39,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:41:39 BoogieIcfgContainer [2023-08-31 11:41:39,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 11:41:39,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 11:41:39,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 11:41:39,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 11:41:39,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 11:41:37" (1/3) ... [2023-08-31 11:41:39,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d791d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:41:39, skipping insertion in model container [2023-08-31 11:41:39,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:41:38" (2/3) ... [2023-08-31 11:41:39,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d791d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:41:39, skipping insertion in model container [2023-08-31 11:41:39,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:41:39" (3/3) ... [2023-08-31 11:41:39,685 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-08-31 11:41:39,693 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 11:41:39,700 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 11:41:39,701 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-31 11:41:39,701 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 11:41:39,788 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:41:39,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 181 transitions, 367 flow [2023-08-31 11:41:39,905 INFO L130 PetriNetUnfolder]: 11/191 cut-off events. [2023-08-31 11:41:39,906 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:41:39,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 191 events. 11/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 157. Up to 4 conditions per place. [2023-08-31 11:41:39,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 181 transitions, 367 flow [2023-08-31 11:41:39,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 181 transitions, 367 flow [2023-08-31 11:41:39,923 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:41:39,933 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 181 transitions, 367 flow [2023-08-31 11:41:39,936 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 181 transitions, 367 flow [2023-08-31 11:41:39,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 181 transitions, 367 flow [2023-08-31 11:41:39,976 INFO L130 PetriNetUnfolder]: 11/191 cut-off events. [2023-08-31 11:41:39,977 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:41:39,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 191 events. 11/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 157. Up to 4 conditions per place. [2023-08-31 11:41:39,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 3770 [2023-08-31 11:41:46,170 INFO L134 LiptonReduction]: Checked pairs total: 4399 [2023-08-31 11:41:46,171 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-31 11:41:46,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:41:46,202 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:41:46,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:41:46,211 INFO L130 PetriNetUnfolder]: 2/20 cut-off events. [2023-08-31 11:41:46,220 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:41:46,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:41:46,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 11:41:46,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:41:46,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:41:46,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1874194445, now seen corresponding path program 1 times [2023-08-31 11:41:46,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:41:46,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777799856] [2023-08-31 11:41:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:41:46,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:41:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:41:46,382 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:41:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:41:46,440 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:41:46,442 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:41:46,443 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:41:46,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 11:41:46,445 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:41:46,450 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:41:46,451 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:41:46,451 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 11:41:46,570 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:41:46,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 327 transitions, 666 flow [2023-08-31 11:41:46,649 INFO L130 PetriNetUnfolder]: 21/349 cut-off events. [2023-08-31 11:41:46,649 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:41:46,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 349 events. 21/349 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 949 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 302. Up to 6 conditions per place. [2023-08-31 11:41:46,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 313 places, 327 transitions, 666 flow [2023-08-31 11:41:46,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 313 places, 327 transitions, 666 flow [2023-08-31 11:41:46,657 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:41:46,658 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 313 places, 327 transitions, 666 flow [2023-08-31 11:41:46,658 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 313 places, 327 transitions, 666 flow [2023-08-31 11:41:46,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 327 transitions, 666 flow [2023-08-31 11:41:46,788 INFO L130 PetriNetUnfolder]: 21/349 cut-off events. [2023-08-31 11:41:46,788 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:41:46,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 349 events. 21/349 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 949 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 302. Up to 6 conditions per place. [2023-08-31 11:41:46,822 INFO L119 LiptonReduction]: Number of co-enabled transitions 49880 [2023-08-31 11:41:53,194 INFO L134 LiptonReduction]: Checked pairs total: 221986 [2023-08-31 11:41:53,194 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-08-31 11:41:53,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:41:53,197 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:41:53,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:41:53,201 INFO L130 PetriNetUnfolder]: 1/37 cut-off events. [2023-08-31 11:41:53,202 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:41:53,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:41:53,202 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 11:41:53,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:41:53,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:41:53,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1770387562, now seen corresponding path program 1 times [2023-08-31 11:41:53,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:41:53,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893237901] [2023-08-31 11:41:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:41:53,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:41:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:41:53,225 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:41:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:41:53,243 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:41:53,244 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:41:53,244 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:41:53,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 11:41:53,244 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:41:53,245 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:41:53,245 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:41:53,245 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 11:41:53,331 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:41:53,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 452 places, 473 transitions, 967 flow [2023-08-31 11:41:53,473 INFO L130 PetriNetUnfolder]: 31/507 cut-off events. [2023-08-31 11:41:53,474 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:41:53,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 507 events. 31/507 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1855 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 447. Up to 8 conditions per place. [2023-08-31 11:41:53,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 452 places, 473 transitions, 967 flow [2023-08-31 11:41:53,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 452 places, 473 transitions, 967 flow [2023-08-31 11:41:53,494 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:41:53,494 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 452 places, 473 transitions, 967 flow [2023-08-31 11:41:53,495 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 452 places, 473 transitions, 967 flow [2023-08-31 11:41:53,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 452 places, 473 transitions, 967 flow [2023-08-31 11:41:53,597 INFO L130 PetriNetUnfolder]: 31/507 cut-off events. [2023-08-31 11:41:53,597 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:41:53,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 507 events. 31/507 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1855 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 447. Up to 8 conditions per place. [2023-08-31 11:41:53,659 INFO L119 LiptonReduction]: Number of co-enabled transitions 138330 [2023-08-31 11:42:17,260 INFO L134 LiptonReduction]: Checked pairs total: 552886 [2023-08-31 11:42:17,261 INFO L136 LiptonReduction]: Total number of compositions: 281 [2023-08-31 11:42:17,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:42:17,264 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:42:17,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:42:17,270 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2023-08-31 11:42:17,271 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:42:17,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:42:17,271 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 11:42:17,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:42:17,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:42:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1778784938, now seen corresponding path program 1 times [2023-08-31 11:42:17,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:42:17,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870531472] [2023-08-31 11:42:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:42:17,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:42:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:42:17,307 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:42:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:42:17,348 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:42:17,349 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:42:17,349 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:42:17,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 11:42:17,349 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:42:17,350 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:42:17,350 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:42:17,350 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 11:42:17,479 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:42:17,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 591 places, 619 transitions, 1270 flow [2023-08-31 11:42:17,663 INFO L130 PetriNetUnfolder]: 41/665 cut-off events. [2023-08-31 11:42:17,663 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:42:17,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 665 events. 41/665 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2872 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 592. Up to 10 conditions per place. [2023-08-31 11:42:17,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 591 places, 619 transitions, 1270 flow [2023-08-31 11:42:17,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 591 places, 619 transitions, 1270 flow [2023-08-31 11:42:17,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:42:17,691 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 591 places, 619 transitions, 1270 flow [2023-08-31 11:42:17,691 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 591 places, 619 transitions, 1270 flow [2023-08-31 11:42:17,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 591 places, 619 transitions, 1270 flow [2023-08-31 11:42:17,884 INFO L130 PetriNetUnfolder]: 41/665 cut-off events. [2023-08-31 11:42:17,884 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:42:17,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 665 events. 41/665 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2872 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 592. Up to 10 conditions per place. [2023-08-31 11:42:18,011 INFO L119 LiptonReduction]: Number of co-enabled transitions 269120 [2023-08-31 11:43:00,179 INFO L134 LiptonReduction]: Checked pairs total: 1260756 [2023-08-31 11:43:00,179 INFO L136 LiptonReduction]: Total number of compositions: 377 [2023-08-31 11:43:00,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:43:00,183 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:43:00,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:43:00,198 INFO L130 PetriNetUnfolder]: 5/125 cut-off events. [2023-08-31 11:43:00,199 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:43:00,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:43:00,199 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 11:43:00,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:43:00,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:43:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash -419963176, now seen corresponding path program 1 times [2023-08-31 11:43:00,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:43:00,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536028358] [2023-08-31 11:43:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:43:00,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:43:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:43:00,237 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:43:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:43:00,260 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:43:00,265 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:43:00,265 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:43:00,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 11:43:00,266 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:43:00,266 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:43:00,267 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:43:00,267 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 11:43:00,414 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:43:00,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 730 places, 765 transitions, 1575 flow [2023-08-31 11:43:00,816 INFO L130 PetriNetUnfolder]: 51/823 cut-off events. [2023-08-31 11:43:00,817 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:43:00,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 823 events. 51/823 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3941 event pairs, 0 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 737. Up to 12 conditions per place. [2023-08-31 11:43:00,861 INFO L82 GeneralOperation]: Start removeDead. Operand has 730 places, 765 transitions, 1575 flow [2023-08-31 11:43:00,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 730 places, 765 transitions, 1575 flow [2023-08-31 11:43:00,872 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:43:00,873 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 730 places, 765 transitions, 1575 flow [2023-08-31 11:43:00,873 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 730 places, 765 transitions, 1575 flow [2023-08-31 11:43:00,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 730 places, 765 transitions, 1575 flow [2023-08-31 11:43:01,173 INFO L130 PetriNetUnfolder]: 51/823 cut-off events. [2023-08-31 11:43:01,173 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:43:01,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 823 events. 51/823 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3941 event pairs, 0 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 737. Up to 12 conditions per place. [2023-08-31 11:43:01,312 INFO L119 LiptonReduction]: Number of co-enabled transitions 442250 [2023-08-31 11:43:23,380 INFO L134 LiptonReduction]: Checked pairs total: 1843009 [2023-08-31 11:43:23,380 INFO L136 LiptonReduction]: Total number of compositions: 440 [2023-08-31 11:43:23,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:43:23,383 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:43:23,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:43:23,404 INFO L130 PetriNetUnfolder]: 9/189 cut-off events. [2023-08-31 11:43:23,404 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:43:23,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:43:23,404 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:43:23,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:43:23,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:43:23,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2014686694, now seen corresponding path program 1 times [2023-08-31 11:43:23,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:43:23,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482078711] [2023-08-31 11:43:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:43:23,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:43:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:43:23,426 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:43:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:43:23,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:43:23,447 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:43:23,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:43:23,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 11:43:23,448 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:43:23,449 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:43:23,449 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:43:23,449 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 11:43:23,617 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:43:23,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 869 places, 911 transitions, 1882 flow [2023-08-31 11:43:23,965 INFO L130 PetriNetUnfolder]: 61/981 cut-off events. [2023-08-31 11:43:23,965 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:43:24,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1021 conditions, 981 events. 61/981 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5055 event pairs, 0 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 882. Up to 14 conditions per place. [2023-08-31 11:43:24,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 869 places, 911 transitions, 1882 flow [2023-08-31 11:43:24,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 869 places, 911 transitions, 1882 flow [2023-08-31 11:43:24,018 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:43:24,018 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 869 places, 911 transitions, 1882 flow [2023-08-31 11:43:24,019 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 869 places, 911 transitions, 1882 flow [2023-08-31 11:43:24,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 869 places, 911 transitions, 1882 flow [2023-08-31 11:43:24,362 INFO L130 PetriNetUnfolder]: 61/981 cut-off events. [2023-08-31 11:43:24,362 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:43:24,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1021 conditions, 981 events. 61/981 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5055 event pairs, 0 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 882. Up to 14 conditions per place. [2023-08-31 11:43:24,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 657720 [2023-08-31 11:44:11,238 INFO L134 LiptonReduction]: Checked pairs total: 3121338 [2023-08-31 11:44:11,238 INFO L136 LiptonReduction]: Total number of compositions: 531 [2023-08-31 11:44:11,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:44:11,240 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:44:11,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:44:11,269 INFO L130 PetriNetUnfolder]: 14/263 cut-off events. [2023-08-31 11:44:11,269 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:44:11,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:44:11,269 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:44:11,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:44:11,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:44:11,269 INFO L85 PathProgramCache]: Analyzing trace with hash 295134810, now seen corresponding path program 1 times [2023-08-31 11:44:11,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:44:11,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429609467] [2023-08-31 11:44:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:44:11,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:44:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:44:11,300 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:44:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:44:11,338 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:44:11,339 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:44:11,339 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:44:11,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 11:44:11,339 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:44:11,343 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:44:11,343 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:44:11,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 11:44:11,513 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:44:11,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:44:12,086 INFO L130 PetriNetUnfolder]: 71/1139 cut-off events. [2023-08-31 11:44:12,087 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:44:12,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 1139 events. 71/1139 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6212 event pairs, 0 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 1027. Up to 16 conditions per place. [2023-08-31 11:44:12,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:44:12,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:44:12,153 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:44:12,153 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:44:12,154 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:44:12,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:44:12,613 INFO L130 PetriNetUnfolder]: 71/1139 cut-off events. [2023-08-31 11:44:12,613 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:44:12,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 1139 events. 71/1139 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6212 event pairs, 0 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 1027. Up to 16 conditions per place. [2023-08-31 11:44:12,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 915530 [2023-08-31 11:44:56,554 INFO L134 LiptonReduction]: Checked pairs total: 4345011 [2023-08-31 11:44:56,554 INFO L136 LiptonReduction]: Total number of compositions: 614 [2023-08-31 11:44:56,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:44:56,556 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:44:56,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:44:56,606 INFO L130 PetriNetUnfolder]: 19/344 cut-off events. [2023-08-31 11:44:56,607 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:44:56,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:44:56,607 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:44:56,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:44:56,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:44:56,608 INFO L85 PathProgramCache]: Analyzing trace with hash 238612654, now seen corresponding path program 1 times [2023-08-31 11:44:56,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:44:56,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948969085] [2023-08-31 11:44:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:44:56,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:44:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:44:56,631 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:44:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:44:56,655 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:44:56,655 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:44:56,655 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:44:56,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 11:44:56,656 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:44:56,656 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:44:56,656 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:44:56,656 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 11:44:56,822 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:44:56,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:57,399 INFO L130 PetriNetUnfolder]: 81/1297 cut-off events. [2023-08-31 11:44:57,399 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:44:57,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 1297 events. 81/1297 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 7333 event pairs, 0 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 1173. Up to 18 conditions per place. [2023-08-31 11:44:57,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:57,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:57,462 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:44:57,462 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:57,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:57,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:58,025 INFO L130 PetriNetUnfolder]: 81/1297 cut-off events. [2023-08-31 11:44:58,025 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:44:58,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 1297 events. 81/1297 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 7333 event pairs, 0 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 1173. Up to 18 conditions per place. [2023-08-31 11:44:58,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 1215680 [2023-08-31 11:45:43,352 INFO L134 LiptonReduction]: Checked pairs total: 5841015 [2023-08-31 11:45:43,352 INFO L136 LiptonReduction]: Total number of compositions: 688 [2023-08-31 11:45:43,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:45:43,355 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:45:43,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:45:43,436 INFO L130 PetriNetUnfolder]: 25/432 cut-off events. [2023-08-31 11:45:43,436 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:45:43,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:45:43,436 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:45:43,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:45:43,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:45:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1912297585, now seen corresponding path program 1 times [2023-08-31 11:45:43,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:45:43,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823735162] [2023-08-31 11:45:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:45:43,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:45:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:45:43,497 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:45:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:45:43,540 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:45:43,541 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:45:43,541 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:45:43,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 11:45:43,541 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:45:43,541 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:45:43,541 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:45:43,541 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 11:45:43,721 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:45:43,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:45:44,353 INFO L130 PetriNetUnfolder]: 91/1455 cut-off events. [2023-08-31 11:45:44,354 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:45:44,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 1455 events. 91/1455 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 8506 event pairs, 0 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 1340. Up to 20 conditions per place. [2023-08-31 11:45:44,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:45:44,471 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:45:44,471 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:45:44,471 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:45:44,471 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:45:44,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:45:45,017 INFO L130 PetriNetUnfolder]: 91/1455 cut-off events. [2023-08-31 11:45:45,017 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:45:45,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 1455 events. 91/1455 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 8506 event pairs, 0 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 1340. Up to 20 conditions per place. [2023-08-31 11:45:45,455 INFO L119 LiptonReduction]: Number of co-enabled transitions 1558170 [2023-08-31 11:46:51,650 INFO L134 LiptonReduction]: Checked pairs total: 7431023 [2023-08-31 11:46:51,650 INFO L136 LiptonReduction]: Total number of compositions: 778 [2023-08-31 11:46:51,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:46:51,652 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:46:51,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:46:51,734 INFO L130 PetriNetUnfolder]: 32/523 cut-off events. [2023-08-31 11:46:51,734 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:46:51,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:46:51,734 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:46:51,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:46:51,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:46:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1569675135, now seen corresponding path program 1 times [2023-08-31 11:46:51,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:46:51,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6863743] [2023-08-31 11:46:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:46:51,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:46:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:46:51,760 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:46:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:46:51,789 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:46:51,789 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:46:51,790 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:46:51,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 11:46:51,790 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:46:51,792 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:46:51,792 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:46:51,792 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 11:46:51,984 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:46:51,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:52,890 INFO L130 PetriNetUnfolder]: 101/1613 cut-off events. [2023-08-31 11:46:52,890 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:46:52,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 1613 events. 101/1613 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9713 event pairs, 0 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1508. Up to 22 conditions per place. [2023-08-31 11:46:52,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:52,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:52,966 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:46:52,966 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:52,966 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:52,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:54,112 INFO L130 PetriNetUnfolder]: 101/1613 cut-off events. [2023-08-31 11:46:54,113 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:46:54,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 1613 events. 101/1613 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9713 event pairs, 0 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1508. Up to 22 conditions per place. [2023-08-31 11:46:54,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 1943000 [2023-08-31 11:48:18,445 INFO L134 LiptonReduction]: Checked pairs total: 9282985 [2023-08-31 11:48:18,445 INFO L136 LiptonReduction]: Total number of compositions: 867 [2023-08-31 11:48:18,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:48:18,447 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:48:18,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:48:18,563 INFO L130 PetriNetUnfolder]: 39/615 cut-off events. [2023-08-31 11:48:18,563 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:48:18,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:48:18,563 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:48:18,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:48:18,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:48:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2052983187, now seen corresponding path program 1 times [2023-08-31 11:48:18,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:48:18,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296043229] [2023-08-31 11:48:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:48:18,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:48:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:48:18,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:48:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:48:18,616 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:48:18,616 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:48:18,616 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:48:18,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 11:48:18,617 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:48:18,617 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:48:18,617 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:48:18,618 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 11:48:18,819 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:48:18,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:48:19,631 INFO L130 PetriNetUnfolder]: 111/1771 cut-off events. [2023-08-31 11:48:19,631 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:48:19,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 1771 events. 111/1771 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 10860 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 1679. Up to 24 conditions per place. [2023-08-31 11:48:19,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:48:19,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:48:19,784 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:48:19,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:48:19,784 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:48:19,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:48:20,570 INFO L130 PetriNetUnfolder]: 111/1771 cut-off events. [2023-08-31 11:48:20,571 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:48:20,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 1771 events. 111/1771 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 10860 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 1679. Up to 24 conditions per place. [2023-08-31 11:48:21,275 INFO L119 LiptonReduction]: Number of co-enabled transitions 2370170 [2023-08-31 11:49:47,933 INFO L134 LiptonReduction]: Checked pairs total: 11311576 [2023-08-31 11:49:47,934 INFO L136 LiptonReduction]: Total number of compositions: 949 [2023-08-31 11:49:47,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:49:47,936 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:49:47,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:49:48,066 INFO L130 PetriNetUnfolder]: 46/702 cut-off events. [2023-08-31 11:49:48,067 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:49:48,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:49:48,067 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:49:48,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:49:48,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:49:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1048373946, now seen corresponding path program 1 times [2023-08-31 11:49:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:49:48,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791704289] [2023-08-31 11:49:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:49:48,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:49:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:49:48,094 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:49:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:49:48,122 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:49:48,123 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:49:48,123 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:49:48,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 11:49:48,123 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:49:48,124 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:49:48,124 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:49:48,124 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 11:49:48,380 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:49:48,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:49:49,536 INFO L130 PetriNetUnfolder]: 121/1929 cut-off events. [2023-08-31 11:49:49,537 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:49:49,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 1929 events. 121/1929 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 12044 event pairs, 0 based on Foata normal form. 0/1483 useless extension candidates. Maximal degree in co-relation 1851. Up to 26 conditions per place. [2023-08-31 11:49:49,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:49:49,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:49:49,680 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:49:49,680 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:49:49,680 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:49:49,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:49:50,852 INFO L130 PetriNetUnfolder]: 121/1929 cut-off events. [2023-08-31 11:49:50,852 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:49:50,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 1929 events. 121/1929 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 12044 event pairs, 0 based on Foata normal form. 0/1483 useless extension candidates. Maximal degree in co-relation 1851. Up to 26 conditions per place. [2023-08-31 11:49:51,506 INFO L119 LiptonReduction]: Number of co-enabled transitions 2839680 [2023-08-31 11:51:14,795 INFO L134 LiptonReduction]: Checked pairs total: 13541224 [2023-08-31 11:51:14,795 INFO L136 LiptonReduction]: Total number of compositions: 1011 [2023-08-31 11:51:14,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:51:14,798 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:51:14,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:51:15,002 INFO L130 PetriNetUnfolder]: 53/796 cut-off events. [2023-08-31 11:51:15,003 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:51:15,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:51:15,003 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:51:15,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:51:15,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:51:15,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2052502642, now seen corresponding path program 1 times [2023-08-31 11:51:15,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:51:15,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151796729] [2023-08-31 11:51:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:51:15,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:51:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:51:15,033 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:51:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:51:15,067 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:51:15,067 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:51:15,068 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:51:15,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 11:51:15,068 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:51:15,069 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:51:15,069 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:51:15,069 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 11:51:15,315 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:51:15,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:51:16,714 INFO L130 PetriNetUnfolder]: 131/2087 cut-off events. [2023-08-31 11:51:16,715 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:51:16,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 2087 events. 131/2087 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 13258 event pairs, 0 based on Foata normal form. 0/1604 useless extension candidates. Maximal degree in co-relation 2024. Up to 28 conditions per place. [2023-08-31 11:51:16,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:51:16,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:51:16,866 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:51:16,867 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:51:16,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:51:16,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:51:18,353 INFO L130 PetriNetUnfolder]: 131/2087 cut-off events. [2023-08-31 11:51:18,354 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:51:18,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 2087 events. 131/2087 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 13258 event pairs, 0 based on Foata normal form. 0/1604 useless extension candidates. Maximal degree in co-relation 2024. Up to 28 conditions per place. [2023-08-31 11:51:19,070 INFO L119 LiptonReduction]: Number of co-enabled transitions 3351530 [2023-08-31 11:52:23,264 INFO L134 LiptonReduction]: Checked pairs total: 15976637 [2023-08-31 11:52:23,264 INFO L136 LiptonReduction]: Total number of compositions: 1099 [2023-08-31 11:52:23,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:52:23,266 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:52:23,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:52:23,498 INFO L130 PetriNetUnfolder]: 60/887 cut-off events. [2023-08-31 11:52:23,498 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:52:23,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:52:23,498 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:52:23,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:52:23,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:52:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash -839188135, now seen corresponding path program 1 times [2023-08-31 11:52:23,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:52:23,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103777540] [2023-08-31 11:52:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:52:23,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:52:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:52:23,528 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:52:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:52:23,564 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:52:23,564 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:52:23,565 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:52:23,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 11:52:23,565 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:52:23,565 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:52:23,565 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:52:23,566 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 11:52:23,914 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:52:23,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:52:25,658 INFO L130 PetriNetUnfolder]: 141/2245 cut-off events. [2023-08-31 11:52:25,658 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:52:25,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 2245 events. 141/2245 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 14421 event pairs, 0 based on Foata normal form. 0/1725 useless extension candidates. Maximal degree in co-relation 2198. Up to 30 conditions per place. [2023-08-31 11:52:25,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:52:25,825 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:52:25,825 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:52:25,826 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:52:25,826 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:52:25,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:52:27,381 INFO L130 PetriNetUnfolder]: 141/2245 cut-off events. [2023-08-31 11:52:27,381 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:52:27,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 2245 events. 141/2245 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 14421 event pairs, 0 based on Foata normal form. 0/1725 useless extension candidates. Maximal degree in co-relation 2198. Up to 30 conditions per place. [2023-08-31 11:52:28,191 INFO L119 LiptonReduction]: Number of co-enabled transitions 3905720 [2023-08-31 11:53:59,440 INFO L134 LiptonReduction]: Checked pairs total: 16378385 [2023-08-31 11:53:59,440 INFO L136 LiptonReduction]: Total number of compositions: 1186 [2023-08-31 11:53:59,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:53:59,443 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;@2db9b266, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:53:59,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:53:59,785 INFO L130 PetriNetUnfolder]: 67/979 cut-off events. [2023-08-31 11:53:59,785 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:53:59,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:53:59,785 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:53:59,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:53:59,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:53:59,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1705700386, now seen corresponding path program 1 times [2023-08-31 11:53:59,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:53:59,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429502355] [2023-08-31 11:53:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:53:59,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:53:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:53:59,818 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:53:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:53:59,852 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:53:59,852 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:53:59,852 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:53:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 11:53:59,853 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:53:59,853 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:53:59,853 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:53:59,853 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 11:54:00,146 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:54:00,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:54:02,025 INFO L130 PetriNetUnfolder]: 151/2403 cut-off events. [2023-08-31 11:54:02,026 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:54:02,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 2403 events. 151/2403 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 15578 event pairs, 0 based on Foata normal form. 0/1846 useless extension candidates. Maximal degree in co-relation 2373. Up to 32 conditions per place. [2023-08-31 11:54:02,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:54:02,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:54:02,242 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:54:02,242 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:54:02,242 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:54:02,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:54:04,196 INFO L130 PetriNetUnfolder]: 151/2403 cut-off events. [2023-08-31 11:54:04,196 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:54:04,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 2403 events. 151/2403 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 15578 event pairs, 0 based on Foata normal form. 0/1846 useless extension candidates. Maximal degree in co-relation 2373. Up to 32 conditions per place. [2023-08-31 11:54:05,172 INFO L119 LiptonReduction]: Number of co-enabled transitions 4502250 Killed by 15