./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.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 TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:58:17,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:58:17,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:58:17,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:58:17,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:58:17,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:58:17,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:58:17,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:58:17,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:58:17,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:58:17,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:58:17,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:58:17,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:58:17,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:58:17,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:58:17,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:58:17,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:58:17,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:58:17,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:58:17,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:58:17,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:58:17,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:58:17,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:58:17,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:58:17,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:58:17,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:58:17,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:58:17,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:58:17,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:58:17,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:58:17,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:58:17,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:58:17,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:58:17,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:58:17,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:58:17,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:58:17,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:58:17,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:58:17,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:58:17,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:58:17,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:58:17,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:58:17,366 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:58:17,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:58:17,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:58:17,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:58:17,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:58:17,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:58:17,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:58:17,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:58:17,368 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:58:17,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:58:17,369 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:58:17,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:58:17,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:58:17,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:58:17,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:58:17,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:58:17,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:58:17,370 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:58:17,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:58:17,370 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:58:17,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:58:17,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:58:17,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:58:17,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:58:17,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:58:17,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:58:17,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:58:17,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:58:17,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:58:17,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:58:17,372 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:58:17,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:58:17,372 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:58:17,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:58:17,373 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:58:17,373 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:58:17,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:58:17,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:58:17,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:58:17,581 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:58:17,582 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:58:17,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-30 22:58:18,500 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:58:18,716 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:58:18,717 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-30 22:58:18,741 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/270b1ab39/1c9ab293de404438a13ecdb60b1c6a40/FLAG4b3b38b50 [2023-08-30 22:58:18,751 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/270b1ab39/1c9ab293de404438a13ecdb60b1c6a40 [2023-08-30 22:58:18,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:58:18,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:58:18,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:58:18,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:58:18,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:58:18,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:58:18" (1/1) ... [2023-08-30 22:58:18,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e377883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:18, skipping insertion in model container [2023-08-30 22:58:18,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:58:18" (1/1) ... [2023-08-30 22:58:18,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:58:18,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:58:19,059 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] [2023-08-30 22:58:19,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:58:19,078 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:58:19,112 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] [2023-08-30 22:58:19,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:58:19,204 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:58:19,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19 WrapperNode [2023-08-30 22:58:19,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:58:19,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:58:19,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:58:19,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:58:19,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,263 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-08-30 22:58:19,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:58:19,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:58:19,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:58:19,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:58:19,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,306 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:58:19,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:58:19,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:58:19,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:58:19,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (1/1) ... [2023-08-30 22:58:19,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:58:19,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:58:19,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 22:58:19,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 22:58:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 22:58:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 22:58:19,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 22:58:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:58:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:58:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:58:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:58:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:58:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:58:19,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:58:19,419 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:58:19,587 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:58:19,588 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:58:19,836 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:58:19,973 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:58:19,973 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 22:58:19,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:58:19 BoogieIcfgContainer [2023-08-30 22:58:19,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:58:19,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:58:19,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:58:19,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:58:19,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:58:18" (1/3) ... [2023-08-30 22:58:19,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415281eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:58:19, skipping insertion in model container [2023-08-30 22:58:19,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:19" (2/3) ... [2023-08-30 22:58:19,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415281eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:58:19, skipping insertion in model container [2023-08-30 22:58:19,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:58:19" (3/3) ... [2023-08-30 22:58:19,982 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-08-30 22:58:19,988 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:58:19,995 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:58:19,995 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 22:58:19,995 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:58:20,067 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:58:20,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:20,140 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 22:58:20,141 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:58:20,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 22:58:20,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:20,147 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:20,149 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:58:20,154 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:20,155 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:20,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:20,175 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 22:58:20,175 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:58:20,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 22:58:20,177 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-08-30 22:58:23,063 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-08-30 22:58:23,065 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-30 22:58:23,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:58:23,077 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;@2a6c0f26, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:58:23,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 22:58:23,081 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 22:58:23,081 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:58:23,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:58:23,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 22:58:23,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 22:58:23,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:58:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash 174361225, now seen corresponding path program 1 times [2023-08-30 22:58:23,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:58:23,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75088581] [2023-08-30 22:58:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:58:23,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:58:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:23,153 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:58:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:23,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:58:23,177 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:58:23,178 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 22:58:23,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 22:58:23,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 22:58:23,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:58:23,180 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 22:58:23,181 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:58:23,181 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 22:58:23,218 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:58:23,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:23,253 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-08-30 22:58:23,254 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:58:23,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-30 22:58:23,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:23,257 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:23,257 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:58:23,257 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:23,257 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:23,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:23,279 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-08-30 22:58:23,280 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:58:23,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-30 22:58:23,286 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-08-30 22:58:27,183 INFO L134 LiptonReduction]: Checked pairs total: 33585 [2023-08-30 22:58:27,184 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-30 22:58:27,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:58:27,186 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;@2a6c0f26, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:58:27,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 22:58:27,192 INFO L130 PetriNetUnfolder]: 3/31 cut-off events. [2023-08-30 22:58:27,193 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:58:27,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:58:27,194 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 22:58:27,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 22:58:27,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:58:27,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1971217253, now seen corresponding path program 1 times [2023-08-30 22:58:27,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:58:27,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129805265] [2023-08-30 22:58:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:58:27,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:58:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:27,223 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:58:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:27,262 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:58:27,262 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:58:27,263 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 22:58:27,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 22:58:27,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 22:58:27,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 22:58:27,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:58:27,263 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 22:58:27,264 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:58:27,264 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 22:58:27,305 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:58:27,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:27,350 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-08-30 22:58:27,351 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:58:27,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-30 22:58:27,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:27,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:27,360 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:58:27,361 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:27,361 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:27,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:27,391 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-08-30 22:58:27,391 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:58:27,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-30 22:58:27,406 INFO L119 LiptonReduction]: Number of co-enabled transitions 43056 [2023-08-30 22:58:32,384 INFO L134 LiptonReduction]: Checked pairs total: 78907 [2023-08-30 22:58:32,384 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-08-30 22:58:32,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:58:32,386 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;@2a6c0f26, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:58:32,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 22:58:32,390 INFO L130 PetriNetUnfolder]: 7/57 cut-off events. [2023-08-30 22:58:32,390 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:58:32,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:58:32,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:58:32,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:58:32,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:58:32,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1544388608, now seen corresponding path program 1 times [2023-08-30 22:58:32,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:58:32,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278075312] [2023-08-30 22:58:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:58:32,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:58:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:58:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:58:32,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:58:32,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278075312] [2023-08-30 22:58:32,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278075312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:58:32,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:58:32,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:58:32,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231070475] [2023-08-30 22:58:32,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:58:32,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 22:58:32,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:58:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 22:58:32,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 22:58:32,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 490 [2023-08-30 22:58:32,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:58:32,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:58:32,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 490 [2023-08-30 22:58:32,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:58:37,594 INFO L130 PetriNetUnfolder]: 46331/66407 cut-off events. [2023-08-30 22:58:37,594 INFO L131 PetriNetUnfolder]: For 2467/2467 co-relation queries the response was YES. [2023-08-30 22:58:37,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129134 conditions, 66407 events. 46331/66407 cut-off events. For 2467/2467 co-relation queries the response was YES. Maximal size of possible extension queue 1898. Compared 484886 event pairs, 3829 based on Foata normal form. 0/53028 useless extension candidates. Maximal degree in co-relation 84412. Up to 41570 conditions per place. [2023-08-30 22:58:38,009 INFO L137 encePairwiseOnDemand]: 474/490 looper letters, 196 selfloop transitions, 9 changer transitions 0/226 dead transitions. [2023-08-30 22:58:38,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 226 transitions, 914 flow [2023-08-30 22:58:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 22:58:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 22:58:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1335 transitions. [2023-08-30 22:58:38,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448979591836735 [2023-08-30 22:58:38,026 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1335 transitions. [2023-08-30 22:58:38,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1335 transitions. [2023-08-30 22:58:38,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:58:38,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1335 transitions. [2023-08-30 22:58:38,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:58:38,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:58:38,044 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:58:38,045 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 213 flow. Second operand 5 states and 1335 transitions. [2023-08-30 22:58:38,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 226 transitions, 914 flow [2023-08-30 22:58:38,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 226 transitions, 902 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 22:58:38,054 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 267 flow [2023-08-30 22:58:38,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2023-08-30 22:58:38,060 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 7 predicate places. [2023-08-30 22:58:38,060 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 267 flow [2023-08-30 22:58:38,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:58:38,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:58:38,061 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 22:58:38,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:58:38,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:58:38,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:58:38,062 INFO L85 PathProgramCache]: Analyzing trace with hash -271960691, now seen corresponding path program 1 times [2023-08-30 22:58:38,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:58:38,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646078395] [2023-08-30 22:58:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:58:38,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:58:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:38,092 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:58:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:38,114 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:58:38,115 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:58:38,115 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 22:58:38,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 22:58:38,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 22:58:38,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 22:58:38,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 22:58:38,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:58:38,116 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:58:38,117 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:58:38,117 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 22:58:38,169 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:58:38,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:38,220 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-08-30 22:58:38,220 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:58:38,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-08-30 22:58:38,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:38,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:38,231 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:58:38,232 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:38,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:38,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:38,275 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-08-30 22:58:38,276 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:58:38,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-08-30 22:58:38,295 INFO L119 LiptonReduction]: Number of co-enabled transitions 82056 [2023-08-30 22:58:44,189 INFO L134 LiptonReduction]: Checked pairs total: 163123 [2023-08-30 22:58:44,190 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-30 22:58:44,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:58:44,192 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;@2a6c0f26, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:58:44,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 22:58:44,197 INFO L130 PetriNetUnfolder]: 8/60 cut-off events. [2023-08-30 22:58:44,197 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 22:58:44,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:58:44,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:58:44,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:58:44,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:58:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1068344059, now seen corresponding path program 1 times [2023-08-30 22:58:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:58:44,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132084173] [2023-08-30 22:58:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:58:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:58:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:58:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:58:44,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:58:44,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132084173] [2023-08-30 22:58:44,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132084173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:58:44,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:58:44,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:58:44,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726180985] [2023-08-30 22:58:44,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:58:44,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 22:58:44,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:58:44,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 22:58:44,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 22:58:44,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 633 [2023-08-30 22:58:44,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 128 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:58:44,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:58:44,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 633 [2023-08-30 22:58:44,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:00:37,418 INFO L130 PetriNetUnfolder]: 1158189/1535626 cut-off events. [2023-08-30 23:00:37,418 INFO L131 PetriNetUnfolder]: For 70655/70655 co-relation queries the response was YES. [2023-08-30 23:00:41,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2999796 conditions, 1535626 events. 1158189/1535626 cut-off events. For 70655/70655 co-relation queries the response was YES. Maximal size of possible extension queue 30474. Compared 12392434 event pairs, 164193 based on Foata normal form. 13910/1243779 useless extension candidates. Maximal degree in co-relation 765350. Up to 947194 conditions per place. [2023-08-30 23:00:50,166 INFO L137 encePairwiseOnDemand]: 611/633 looper letters, 296 selfloop transitions, 17 changer transitions 0/341 dead transitions. [2023-08-30 23:00:50,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 341 transitions, 1398 flow [2023-08-30 23:00:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:00:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:00:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1781 transitions. [2023-08-30 23:00:50,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627172195892575 [2023-08-30 23:00:50,190 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1781 transitions. [2023-08-30 23:00:50,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1781 transitions. [2023-08-30 23:00:50,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:00:50,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1781 transitions. [2023-08-30 23:00:50,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 356.2) internal successors, (1781), 5 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:50,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 633.0) internal successors, (3798), 6 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:50,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 633.0) internal successors, (3798), 6 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:50,228 INFO L175 Difference]: Start difference. First operand has 109 places, 128 transitions, 288 flow. Second operand 5 states and 1781 transitions. [2023-08-30 23:00:50,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 341 transitions, 1398 flow [2023-08-30 23:00:50,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 341 transitions, 1368 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-30 23:00:50,357 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 396 flow [2023-08-30 23:00:50,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2023-08-30 23:00:50,374 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, 7 predicate places. [2023-08-30 23:00:50,374 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 396 flow [2023-08-30 23:00:50,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:50,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:00:50,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:00:50,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:00:50,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:00:50,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:00:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1687160668, now seen corresponding path program 1 times [2023-08-30 23:00:50,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:00:50,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813023126] [2023-08-30 23:00:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:00:50,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:00:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:00:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:00:50,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:00:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813023126] [2023-08-30 23:00:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813023126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:00:50,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:00:50,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:00:50,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921976886] [2023-08-30 23:00:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:00:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:00:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:00:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:00:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:00:50,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 633 [2023-08-30 23:00:50,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:50,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:00:50,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 633 [2023-08-30 23:00:50,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand