./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:45:23,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:45:24,032 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:45:24,036 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:45:24,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:45:24,057 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:45:24,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:45:24,058 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:45:24,059 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:45:24,059 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:45:24,060 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:45:24,060 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:45:24,060 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:45:24,060 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:45:24,060 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:45:24,061 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:45:24,061 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:45:24,061 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:45:24,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:45:24,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:45:24,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:45:24,061 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:45:24,061 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:45:24,061 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:45:24,061 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:45:24,062 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:45:24,062 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:45:24,062 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:45:24,062 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:45:24,062 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:45:24,062 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:45:24,062 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:45:24,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:45:24,063 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:45:24,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:45:24,063 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:45:24,063 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:45:24,063 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:45:24,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:45:24,063 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:45:24,063 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:45:24,063 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:45:24,063 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:45:24,063 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2025-02-06 04:45:24,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:45:24,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:45:24,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:45:24,300 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:45:24,300 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:45:24,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2025-02-06 04:45:25,473 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b5958b7cd/5aded470eb38450b8e48fe3704d5e7b0/FLAG9c966dc95 [2025-02-06 04:45:25,768 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:45:25,772 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2025-02-06 04:45:25,785 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b5958b7cd/5aded470eb38450b8e48fe3704d5e7b0/FLAG9c966dc95 [2025-02-06 04:45:26,042 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b5958b7cd/5aded470eb38450b8e48fe3704d5e7b0 [2025-02-06 04:45:26,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:45:26,045 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:45:26,047 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:45:26,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:45:26,051 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:45:26,054 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,055 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb71a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26, skipping insertion in model container [2025-02-06 04:45:26,055 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,084 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:45:26,263 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2025-02-06 04:45:26,270 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2025-02-06 04:45:26,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:45:26,285 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:45:26,326 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2025-02-06 04:45:26,332 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2025-02-06 04:45:26,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:45:26,364 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:45:26,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26 WrapperNode [2025-02-06 04:45:26,365 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:45:26,366 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:45:26,366 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:45:26,366 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:45:26,370 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,380 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,396 INFO L138 Inliner]: procedures = 168, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 132 [2025-02-06 04:45:26,396 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:45:26,397 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:45:26,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:45:26,397 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:45:26,405 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,407 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,418 INFO L175 MemorySlicer]: Split 23 memory accesses to 4 slices as follows [2, 1, 12, 8]. 52 percent of accesses are in the largest equivalence class. The 21 initializations are split as follows [2, 1, 10, 8]. The 1 writes are split as follows [0, 0, 1, 0]. [2025-02-06 04:45:26,418 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,422 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,424 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,425 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:45:26,426 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:45:26,426 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:45:26,426 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:45:26,427 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (1/1) ... [2025-02-06 04:45:26,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:45:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:26,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 04:45:26,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-02-06 04:45:26,467 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-02-06 04:45:26,467 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-06 04:45:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-02-06 04:45:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:45:26,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:45:26,469 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:45:26,563 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:45:26,564 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:45:26,763 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L698: havoc removeLogElement_#t~mem2#1; [2025-02-06 04:45:26,764 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:45:26,764 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:45:26,893 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:45:26,893 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:45:26,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:45:26 BoogieIcfgContainer [2025-02-06 04:45:26,893 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:45:26,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:45:26,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:45:26,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:45:26,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:45:26" (1/3) ... [2025-02-06 04:45:26,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157fe674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:45:26, skipping insertion in model container [2025-02-06 04:45:26,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:45:26" (2/3) ... [2025-02-06 04:45:26,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157fe674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:45:26, skipping insertion in model container [2025-02-06 04:45:26,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:45:26" (3/3) ... [2025-02-06 04:45:26,901 INFO L128 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2025-02-06 04:45:26,911 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:45:26,912 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG circular_buffer_bad.i that has 3 procedures, 35 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-02-06 04:45:26,912 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:45:26,976 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 04:45:27,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 41 transitions, 96 flow [2025-02-06 04:45:27,027 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2025-02-06 04:45:27,029 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:45:27,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 39 events. 7/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 92 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2025-02-06 04:45:27,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 41 transitions, 96 flow [2025-02-06 04:45:27,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 37 transitions, 83 flow [2025-02-06 04:45:27,042 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:45:27,049 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@9fc22fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:45:27,049 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-02-06 04:45:27,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:45:27,060 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2025-02-06 04:45:27,060 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:45:27,060 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:27,061 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:27,061 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:45:27,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1819655814, now seen corresponding path program 1 times [2025-02-06 04:45:27,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:27,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503019095] [2025-02-06 04:45:27,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:27,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:27,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 04:45:27,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 04:45:27,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:27,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:27,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:27,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503019095] [2025-02-06 04:45:27,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503019095] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:27,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:27,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:45:27,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710239016] [2025-02-06 04:45:27,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:27,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:45:27,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:27,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:45:27,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:45:27,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2025-02-06 04:45:27,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2025-02-06 04:45:27,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:27,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2025-02-06 04:45:27,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:27,673 INFO L124 PetriNetUnfolderBase]: 300/549 cut-off events. [2025-02-06 04:45:27,673 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-02-06 04:45:27,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 549 events. 300/549 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2529 event pairs, 210 based on Foata normal form. 39/535 useless extension candidates. Maximal degree in co-relation 989. Up to 463 conditions per place. [2025-02-06 04:45:27,679 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 23 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2025-02-06 04:45:27,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 123 flow [2025-02-06 04:45:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:45:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:45:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2025-02-06 04:45:27,689 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2025-02-06 04:45:27,690 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 83 flow. Second operand 3 states and 62 transitions. [2025-02-06 04:45:27,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 123 flow [2025-02-06 04:45:27,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 118 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 04:45:27,694 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 72 flow [2025-02-06 04:45:27,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2025-02-06 04:45:27,698 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2025-02-06 04:45:27,698 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 72 flow [2025-02-06 04:45:27,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2025-02-06 04:45:27,699 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:27,699 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:27,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:45:27,699 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:45:27,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:27,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1551383138, now seen corresponding path program 1 times [2025-02-06 04:45:27,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:27,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818622722] [2025-02-06 04:45:27,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:27,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:27,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 04:45:27,722 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 04:45:27,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:27,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:27,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:27,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818622722] [2025-02-06 04:45:27,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818622722] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:27,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:27,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:45:27,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495832644] [2025-02-06 04:45:27,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:27,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:45:27,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:27,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:45:27,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:45:27,807 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2025-02-06 04:45:27,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2025-02-06 04:45:27,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:27,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2025-02-06 04:45:27,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:27,938 INFO L124 PetriNetUnfolderBase]: 473/875 cut-off events. [2025-02-06 04:45:27,938 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-06 04:45:27,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 875 events. 473/875 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3848 event pairs, 165 based on Foata normal form. 14/831 useless extension candidates. Maximal degree in co-relation 1621. Up to 425 conditions per place. [2025-02-06 04:45:27,945 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 36 selfloop transitions, 3 changer transitions 2/50 dead transitions. [2025-02-06 04:45:27,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 191 flow [2025-02-06 04:45:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:45:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:45:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2025-02-06 04:45:27,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2025-02-06 04:45:27,948 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 72 flow. Second operand 3 states and 81 transitions. [2025-02-06 04:45:27,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 191 flow [2025-02-06 04:45:27,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:45:27,950 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 86 flow [2025-02-06 04:45:27,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2025-02-06 04:45:27,950 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2025-02-06 04:45:27,951 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 86 flow [2025-02-06 04:45:27,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2025-02-06 04:45:27,952 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:27,952 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:27,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:45:27,952 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:45:27,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:27,952 INFO L85 PathProgramCache]: Analyzing trace with hash 479580877, now seen corresponding path program 1 times [2025-02-06 04:45:27,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:27,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187863001] [2025-02-06 04:45:27,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:27,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:27,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:45:27,968 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:45:27,970 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:27,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:28,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:28,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187863001] [2025-02-06 04:45:28,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187863001] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:28,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:28,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:45:28,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902358318] [2025-02-06 04:45:28,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:28,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:45:28,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:28,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:45:28,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:45:28,078 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2025-02-06 04:45:28,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2025-02-06 04:45:28,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:28,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2025-02-06 04:45:28,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:28,157 INFO L124 PetriNetUnfolderBase]: 305/621 cut-off events. [2025-02-06 04:45:28,157 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-02-06 04:45:28,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 621 events. 305/621 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2682 event pairs, 81 based on Foata normal form. 28/621 useless extension candidates. Maximal degree in co-relation 1177. Up to 295 conditions per place. [2025-02-06 04:45:28,159 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2025-02-06 04:45:28,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 179 flow [2025-02-06 04:45:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:45:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:45:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2025-02-06 04:45:28,161 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2025-02-06 04:45:28,161 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 3 states and 75 transitions. [2025-02-06 04:45:28,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 179 flow [2025-02-06 04:45:28,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:45:28,167 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 91 flow [2025-02-06 04:45:28,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2025-02-06 04:45:28,167 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2025-02-06 04:45:28,168 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 91 flow [2025-02-06 04:45:28,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2025-02-06 04:45:28,168 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:28,168 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:28,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:45:28,168 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:45:28,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1596524766, now seen corresponding path program 1 times [2025-02-06 04:45:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:28,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813739728] [2025-02-06 04:45:28,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:28,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 04:45:28,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 04:45:28,193 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:28,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:28,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:28,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813739728] [2025-02-06 04:45:28,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813739728] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:28,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:28,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 04:45:28,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393168238] [2025-02-06 04:45:28,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:28,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:45:28,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:28,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:45:28,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:45:28,327 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2025-02-06 04:45:28,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2025-02-06 04:45:28,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:28,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2025-02-06 04:45:28,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:28,420 INFO L124 PetriNetUnfolderBase]: 355/724 cut-off events. [2025-02-06 04:45:28,420 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2025-02-06 04:45:28,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 724 events. 355/724 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3084 event pairs, 124 based on Foata normal form. 0/693 useless extension candidates. Maximal degree in co-relation 1456. Up to 402 conditions per place. [2025-02-06 04:45:28,423 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 35 selfloop transitions, 2 changer transitions 3/49 dead transitions. [2025-02-06 04:45:28,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 212 flow [2025-02-06 04:45:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:45:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:45:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2025-02-06 04:45:28,424 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2025-02-06 04:45:28,424 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 91 flow. Second operand 3 states and 76 transitions. [2025-02-06 04:45:28,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 212 flow [2025-02-06 04:45:28,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:45:28,426 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 99 flow [2025-02-06 04:45:28,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2025-02-06 04:45:28,426 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2025-02-06 04:45:28,426 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 99 flow [2025-02-06 04:45:28,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2025-02-06 04:45:28,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:28,427 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:28,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:45:28,427 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:45:28,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash 753945025, now seen corresponding path program 1 times [2025-02-06 04:45:28,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:28,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975482465] [2025-02-06 04:45:28,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:28,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:28,436 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:45:28,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:28,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:28,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:45:28,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728391500] [2025-02-06 04:45:28,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:28,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:28,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:28,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:28,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 04:45:28,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:45:28,606 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:28,606 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:28,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:28,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:45:28,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:28,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-06 04:45:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:28,930 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:45:28,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:28,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975482465] [2025-02-06 04:45:28,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:45:28,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728391500] [2025-02-06 04:45:28,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728391500] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:28,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:28,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 04:45:28,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575112410] [2025-02-06 04:45:28,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:28,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 04:45:28,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:28,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 04:45:28,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:45:28,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2025-02-06 04:45:28,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 99 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2025-02-06 04:45:28,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:28,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2025-02-06 04:45:28,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:29,276 INFO L124 PetriNetUnfolderBase]: 479/986 cut-off events. [2025-02-06 04:45:29,276 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2025-02-06 04:45:29,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 986 events. 479/986 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4861 event pairs, 125 based on Foata normal form. 29/981 useless extension candidates. Maximal degree in co-relation 1999. Up to 434 conditions per place. [2025-02-06 04:45:29,280 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 60 selfloop transitions, 12 changer transitions 7/88 dead transitions. [2025-02-06 04:45:29,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 88 transitions, 396 flow [2025-02-06 04:45:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:45:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:45:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2025-02-06 04:45:29,286 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2025-02-06 04:45:29,286 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 99 flow. Second operand 8 states and 179 transitions. [2025-02-06 04:45:29,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 88 transitions, 396 flow [2025-02-06 04:45:29,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 88 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:45:29,288 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 185 flow [2025-02-06 04:45:29,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2025-02-06 04:45:29,288 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2025-02-06 04:45:29,288 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 185 flow [2025-02-06 04:45:29,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2025-02-06 04:45:29,288 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:29,289 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:29,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 04:45:29,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:29,490 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:45:29,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1597401951, now seen corresponding path program 2 times [2025-02-06 04:45:29,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:29,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700152081] [2025-02-06 04:45:29,490 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:45:29,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:29,499 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:45:29,516 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:29,519 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:45:29,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:45:29,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118451232] [2025-02-06 04:45:29,521 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:45:29,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:29,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:29,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:29,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 04:45:29,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:45:29,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:29,638 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 04:45:29,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:29,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 04:45:29,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:29,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 04:45:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:29,863 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:45:29,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:29,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700152081] [2025-02-06 04:45:29,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:45:29,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118451232] [2025-02-06 04:45:29,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118451232] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:29,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:29,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 04:45:29,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61241842] [2025-02-06 04:45:29,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:29,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 04:45:29,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:29,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 04:45:29,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:45:29,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2025-02-06 04:45:29,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 185 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2025-02-06 04:45:29,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:29,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2025-02-06 04:45:29,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:30,194 INFO L124 PetriNetUnfolderBase]: 648/1361 cut-off events. [2025-02-06 04:45:30,194 INFO L125 PetriNetUnfolderBase]: For 798/798 co-relation queries the response was YES. [2025-02-06 04:45:30,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3410 conditions, 1361 events. 648/1361 cut-off events. For 798/798 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7641 event pairs, 208 based on Foata normal form. 44/1364 useless extension candidates. Maximal degree in co-relation 3393. Up to 546 conditions per place. [2025-02-06 04:45:30,201 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 67 selfloop transitions, 19 changer transitions 7/102 dead transitions. [2025-02-06 04:45:30,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 102 transitions, 590 flow [2025-02-06 04:45:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:45:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:45:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2025-02-06 04:45:30,202 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2025-02-06 04:45:30,202 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 185 flow. Second operand 8 states and 182 transitions. [2025-02-06 04:45:30,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 102 transitions, 590 flow [2025-02-06 04:45:30,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 102 transitions, 572 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 04:45:30,207 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 340 flow [2025-02-06 04:45:30,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2025-02-06 04:45:30,209 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2025-02-06 04:45:30,209 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 340 flow [2025-02-06 04:45:30,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2025-02-06 04:45:30,210 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:30,210 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:30,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 04:45:30,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:30,414 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:45:30,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1682891773, now seen corresponding path program 3 times [2025-02-06 04:45:30,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:30,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109817690] [2025-02-06 04:45:30,415 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:45:30,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:30,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:45:30,447 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:30,447 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 04:45:30,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:45:30,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568105471] [2025-02-06 04:45:30,448 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:45:30,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:30,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:30,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 04:45:30,511 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 1 equivalence classes. [2025-02-06 04:45:30,548 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:30,548 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-06 04:45:30,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:30,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 04:45:30,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:30,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-06 04:45:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:30,742 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:45:30,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:30,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109817690] [2025-02-06 04:45:30,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:45:30,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568105471] [2025-02-06 04:45:30,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568105471] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:30,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:30,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 04:45:30,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177657888] [2025-02-06 04:45:30,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:30,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 04:45:30,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:30,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 04:45:30,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:45:30,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2025-02-06 04:45:30,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2025-02-06 04:45:30,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:30,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2025-02-06 04:45:30,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:31,086 INFO L124 PetriNetUnfolderBase]: 712/1500 cut-off events. [2025-02-06 04:45:31,086 INFO L125 PetriNetUnfolderBase]: For 2360/2364 co-relation queries the response was YES. [2025-02-06 04:45:31,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4368 conditions, 1500 events. 712/1500 cut-off events. For 2360/2364 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8696 event pairs, 215 based on Foata normal form. 15/1474 useless extension candidates. Maximal degree in co-relation 4345. Up to 654 conditions per place. [2025-02-06 04:45:31,093 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 75 selfloop transitions, 21 changer transitions 4/109 dead transitions. [2025-02-06 04:45:31,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 758 flow [2025-02-06 04:45:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:45:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:45:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2025-02-06 04:45:31,094 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2025-02-06 04:45:31,094 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 340 flow. Second operand 8 states and 181 transitions. [2025-02-06 04:45:31,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 758 flow [2025-02-06 04:45:31,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 730 flow, removed 13 selfloop flow, removed 1 redundant places. [2025-02-06 04:45:31,101 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 467 flow [2025-02-06 04:45:31,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=467, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2025-02-06 04:45:31,102 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2025-02-06 04:45:31,102 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 467 flow [2025-02-06 04:45:31,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2025-02-06 04:45:31,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:31,102 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:31,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 04:45:31,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:31,302 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:45:31,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash 176032359, now seen corresponding path program 4 times [2025-02-06 04:45:31,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:31,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236507813] [2025-02-06 04:45:31,303 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:45:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:31,310 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:31,342 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:31,342 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:45:31,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:45:31,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404955537] [2025-02-06 04:45:31,343 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:45:31,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:31,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:31,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:31,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 04:45:31,398 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-02-06 04:45:31,452 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 04:45:31,452 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:45:31,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:31,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:45:31,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:45:31,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-02-06 04:45:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:31,643 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:45:31,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:31,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236507813] [2025-02-06 04:45:31,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:45:31,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404955537] [2025-02-06 04:45:31,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404955537] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:31,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:31,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-06 04:45:31,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813025403] [2025-02-06 04:45:31,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:31,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 04:45:31,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:31,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 04:45:31,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:45:31,680 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2025-02-06 04:45:31,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2025-02-06 04:45:31,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:31,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2025-02-06 04:45:31,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:32,025 INFO L124 PetriNetUnfolderBase]: 874/1871 cut-off events. [2025-02-06 04:45:32,026 INFO L125 PetriNetUnfolderBase]: For 3705/3713 co-relation queries the response was YES. [2025-02-06 04:45:32,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5689 conditions, 1871 events. 874/1871 cut-off events. For 3705/3713 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11340 event pairs, 166 based on Foata normal form. 15/1841 useless extension candidates. Maximal degree in co-relation 5661. Up to 506 conditions per place. [2025-02-06 04:45:32,033 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 85 selfloop transitions, 28 changer transitions 7/129 dead transitions. [2025-02-06 04:45:32,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 993 flow [2025-02-06 04:45:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 04:45:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 04:45:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2025-02-06 04:45:32,035 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2025-02-06 04:45:32,035 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 467 flow. Second operand 8 states and 193 transitions. [2025-02-06 04:45:32,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 993 flow [2025-02-06 04:45:32,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 129 transitions, 954 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-02-06 04:45:32,043 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 584 flow [2025-02-06 04:45:32,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=584, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2025-02-06 04:45:32,044 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2025-02-06 04:45:32,044 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 584 flow [2025-02-06 04:45:32,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2025-02-06 04:45:32,044 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:32,044 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:32,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 04:45:32,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-06 04:45:32,248 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:45:32,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:32,248 INFO L85 PathProgramCache]: Analyzing trace with hash -364688305, now seen corresponding path program 1 times [2025-02-06 04:45:32,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:32,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971169425] [2025-02-06 04:45:32,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:32,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:32,255 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:45:32,257 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:45:32,257 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:32,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:45:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:45:32,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:45:32,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971169425] [2025-02-06 04:45:32,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971169425] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:45:32,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:45:32,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:45:32,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114992660] [2025-02-06 04:45:32,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:45:32,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:45:32,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:45:32,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:45:32,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:45:32,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2025-02-06 04:45:32,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 584 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2025-02-06 04:45:32,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:45:32,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2025-02-06 04:45:32,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:45:32,435 INFO L124 PetriNetUnfolderBase]: 816/1719 cut-off events. [2025-02-06 04:45:32,436 INFO L125 PetriNetUnfolderBase]: For 4721/4721 co-relation queries the response was YES. [2025-02-06 04:45:32,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5503 conditions, 1719 events. 816/1719 cut-off events. For 4721/4721 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9897 event pairs, 204 based on Foata normal form. 52/1732 useless extension candidates. Maximal degree in co-relation 5472. Up to 1076 conditions per place. [2025-02-06 04:45:32,442 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 65 selfloop transitions, 2 changer transitions 12/87 dead transitions. [2025-02-06 04:45:32,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 87 transitions, 791 flow [2025-02-06 04:45:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:45:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:45:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2025-02-06 04:45:32,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2025-02-06 04:45:32,443 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 584 flow. Second operand 3 states and 75 transitions. [2025-02-06 04:45:32,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 87 transitions, 791 flow [2025-02-06 04:45:32,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 713 flow, removed 14 selfloop flow, removed 6 redundant places. [2025-02-06 04:45:32,450 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 423 flow [2025-02-06 04:45:32,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2025-02-06 04:45:32,451 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2025-02-06 04:45:32,451 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 423 flow [2025-02-06 04:45:32,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2025-02-06 04:45:32,451 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:45:32,451 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:32,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 04:45:32,451 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:45:32,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:45:32,452 INFO L85 PathProgramCache]: Analyzing trace with hash 995150407, now seen corresponding path program 1 times [2025-02-06 04:45:32,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:45:32,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117417524] [2025-02-06 04:45:32,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:32,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:45:32,459 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:45:32,489 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:45:32,489 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:32,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:45:32,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664141903] [2025-02-06 04:45:32,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:45:32,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:45:32,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:45:32,493 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:45:32,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 04:45:32,544 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:45:32,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:45:32,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:32,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:45:32,577 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 04:45:32,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-06 04:45:32,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-06 04:45:32,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:45:32,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:45:32,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 04:45:32,621 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 04:45:32,621 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2025-02-06 04:45:32,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2025-02-06 04:45:32,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2025-02-06 04:45:32,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-02-06 04:45:32,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-02-06 04:45:32,622 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-02-06 04:45:32,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 04:45:32,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 04:45:32,826 INFO L422 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2025-02-06 04:45:32,862 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 04:45:32,862 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 04:45:32,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 04:45:32 BasicIcfg [2025-02-06 04:45:32,866 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 04:45:32,867 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 04:45:32,867 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 04:45:32,867 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 04:45:32,867 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:45:26" (3/4) ... [2025-02-06 04:45:32,868 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-02-06 04:45:32,909 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 17. [2025-02-06 04:45:32,954 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-06 04:45:32,957 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-06 04:45:32,957 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 04:45:32,958 INFO L158 Benchmark]: Toolchain (without parser) took 6912.74ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 112.4MB in the beginning and 87.9MB in the end (delta: 24.5MB). Peak memory consumption was 58.8MB. Max. memory is 16.1GB. [2025-02-06 04:45:32,958 INFO L158 Benchmark]: CDTParser took 0.52ms. Allocated memory is still 201.3MB. Free memory is still 124.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:45:32,959 INFO L158 Benchmark]: CACSL2BoogieTranslator took 318.14ms. Allocated memory is still 142.6MB. Free memory was 112.4MB in the beginning and 91.5MB in the end (delta: 20.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 04:45:32,959 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.89ms. Allocated memory is still 142.6MB. Free memory was 91.5MB in the beginning and 89.5MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:45:32,959 INFO L158 Benchmark]: Boogie Preprocessor took 28.62ms. Allocated memory is still 142.6MB. Free memory was 89.5MB in the beginning and 87.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:45:32,959 INFO L158 Benchmark]: IcfgBuilder took 467.16ms. Allocated memory is still 142.6MB. Free memory was 87.6MB in the beginning and 47.1MB in the end (delta: 40.5MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2025-02-06 04:45:32,960 INFO L158 Benchmark]: TraceAbstraction took 5970.22ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 46.6MB in the beginning and 97.9MB in the end (delta: -51.3MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:45:32,960 INFO L158 Benchmark]: Witness Printer took 90.83ms. Allocated memory is still 176.2MB. Free memory was 97.9MB in the beginning and 87.9MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:45:32,961 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52ms. Allocated memory is still 201.3MB. Free memory is still 124.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 318.14ms. Allocated memory is still 142.6MB. Free memory was 112.4MB in the beginning and 91.5MB in the end (delta: 20.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.89ms. Allocated memory is still 142.6MB. Free memory was 91.5MB in the beginning and 89.5MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.62ms. Allocated memory is still 142.6MB. Free memory was 89.5MB in the beginning and 87.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 467.16ms. Allocated memory is still 142.6MB. Free memory was 87.6MB in the beginning and 47.1MB in the end (delta: 40.5MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * TraceAbstraction took 5970.22ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 46.6MB in the beginning and 97.9MB in the end (delta: -51.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 90.83ms. Allocated memory is still 176.2MB. Free memory was 97.9MB in the beginning and 87.9MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1=-1, m={4:0}, next=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1=-1, id2=0, m={4:0}, next=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L743] COND FALSE 2 !(\read(receive)) VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b [L710] 1 next = (next+1)%buffer_size VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=0, send=1] [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 63 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.8s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 386 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 344 mSDsluCounter, 113 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 100 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1659 IncrementalHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 13 mSDtfsCounter, 1659 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=584occurred in iteration=8, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 307 NumberOfCodeBlocks, 307 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 1562 SizeOfPredicates, 40 NumberOfNonLiveVariables, 772 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-02-06 04:45:32,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE