./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-atomic/read_write_lock-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-atomic/read_write_lock-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ab88d5d149a161a7149bad4a02dfeb168f970e6264d498d3725e0f24ecb8e5e3 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:22:56,065 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:22:56,138 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:22:56,142 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:22:56,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:22:56,164 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:22:56,165 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:22:56,165 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:22:56,166 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:22:56,166 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:22:56,167 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:22:56,167 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:22:56,167 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:22:56,168 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:22:56,169 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:22:56,169 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:22:56,170 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:22:56,170 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:22:56,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:22:56,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:22:56,170 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:22:56,176 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:22:56,177 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:22:56,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:22:56,177 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:22:56,177 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:22:56,181 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:22:56,181 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:22:56,181 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:22:56,182 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:22:56,182 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:22:56,182 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:22:56,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:22:56,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:22:56,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:22:56,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:22:56,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:22:56,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:22:56,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:22:56,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:22:56,184 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:22:56,184 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:22:56,185 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab88d5d149a161a7149bad4a02dfeb168f970e6264d498d3725e0f24ecb8e5e3 [2024-11-09 10:22:56,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:22:56,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:22:56,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:22:56,418 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:22:56,418 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:22:56,419 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/read_write_lock-1.i [2024-11-09 10:22:57,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:22:57,767 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:22:57,767 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-1.i [2024-11-09 10:22:57,776 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1eb35f6a/a5b8acb95f844f4fb008b1a55fbd82f6/FLAG59da8b059 [2024-11-09 10:22:58,140 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1eb35f6a/a5b8acb95f844f4fb008b1a55fbd82f6 [2024-11-09 10:22:58,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:22:58,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:22:58,143 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:22:58,144 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:22:58,147 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:22:58,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,148 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b586919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58, skipping insertion in model container [2024-11-09 10:22:58,149 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,181 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:22:58,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:22:58,467 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:22:58,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:22:58,534 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:22:58,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58 WrapperNode [2024-11-09 10:22:58,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:22:58,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:22:58,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:22:58,536 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:22:58,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,565 INFO L138 Inliner]: procedures = 163, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2024-11-09 10:22:58,566 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:22:58,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:22:58,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:22:58,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:22:58,573 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,575 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,585 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 11]. The 0 writes are split as follows [0, 0]. [2024-11-09 10:22:58,586 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,591 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,592 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,594 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,595 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:22:58,596 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:22:58,596 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:22:58,596 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:22:58,597 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (1/1) ... [2024-11-09 10:22:58,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:22:58,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:22:58,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:22:58,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:22:58,661 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockUnlock [2024-11-09 10:22:58,661 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockReadLock [2024-11-09 10:22:58,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:22:58,661 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2024-11-09 10:22:58,662 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2024-11-09 10:22:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockWriteLock [2024-11-09 10:22:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:22:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:22:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:22:58,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:22:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2024-11-09 10:22:58,662 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2024-11-09 10:22:58,664 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:22:58,763 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:22:58,766 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:22:58,901 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:22:58,901 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:22:58,996 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:22:58,996 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 10:22:58,996 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:22:58 BoogieIcfgContainer [2024-11-09 10:22:58,997 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:22:58,998 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:22:58,998 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:22:59,001 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:22:59,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:22:58" (1/3) ... [2024-11-09 10:22:59,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1e33c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:22:59, skipping insertion in model container [2024-11-09 10:22:59,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:58" (2/3) ... [2024-11-09 10:22:59,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1e33c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:22:59, skipping insertion in model container [2024-11-09 10:22:59,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:22:58" (3/3) ... [2024-11-09 10:22:59,003 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-1.i [2024-11-09 10:22:59,015 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:22:59,015 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 10:22:59,015 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:22:59,062 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-09 10:22:59,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 54 transitions, 136 flow [2024-11-09 10:22:59,112 INFO L124 PetriNetUnfolderBase]: 4/50 cut-off events. [2024-11-09 10:22:59,113 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:22:59,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 50 events. 4/50 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 106 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-09 10:22:59,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 54 transitions, 136 flow [2024-11-09 10:22:59,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 49 transitions, 122 flow [2024-11-09 10:22:59,132 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:22:59,137 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=None, 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;@7436e84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:22:59,138 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-09 10:22:59,149 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:22:59,153 INFO L124 PetriNetUnfolderBase]: 2/31 cut-off events. [2024-11-09 10:22:59,153 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 10:22:59,154 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:22:59,154 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:22:59,155 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-09 10:22:59,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:22:59,159 INFO L85 PathProgramCache]: Analyzing trace with hash 655278658, now seen corresponding path program 1 times [2024-11-09 10:22:59,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:22:59,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146894213] [2024-11-09 10:22:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:59,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:22:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:22:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:59,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:22:59,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146894213] [2024-11-09 10:22:59,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146894213] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:22:59,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:22:59,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:22:59,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574105543] [2024-11-09 10:22:59,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:22:59,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:22:59,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:22:59,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:22:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:22:59,415 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-11-09 10:22:59,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2024-11-09 10:22:59,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:22:59,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-11-09 10:22:59,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:00,655 INFO L124 PetriNetUnfolderBase]: 10614/15830 cut-off events. [2024-11-09 10:23:00,655 INFO L125 PetriNetUnfolderBase]: For 1283/1283 co-relation queries the response was YES. [2024-11-09 10:23:00,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31541 conditions, 15830 events. 10614/15830 cut-off events. For 1283/1283 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 104078 event pairs, 5308 based on Foata normal form. 1752/17107 useless extension candidates. Maximal degree in co-relation 28479. Up to 8879 conditions per place. [2024-11-09 10:23:00,758 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 53 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2024-11-09 10:23:00,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 292 flow [2024-11-09 10:23:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:23:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:23:00,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-11-09 10:23:00,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7098765432098766 [2024-11-09 10:23:00,768 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 122 flow. Second operand 3 states and 115 transitions. [2024-11-09 10:23:00,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 292 flow [2024-11-09 10:23:00,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 264 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-09 10:23:00,793 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 124 flow [2024-11-09 10:23:00,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-11-09 10:23:00,797 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2024-11-09 10:23:00,797 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 124 flow [2024-11-09 10:23:00,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2024-11-09 10:23:00,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:00,798 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:23:00,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:23:00,798 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-09 10:23:00,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:00,799 INFO L85 PathProgramCache]: Analyzing trace with hash -44672040, now seen corresponding path program 1 times [2024-11-09 10:23:00,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:00,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055985426] [2024-11-09 10:23:00,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:00,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:00,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:00,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055985426] [2024-11-09 10:23:00,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055985426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:00,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:00,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:23:00,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3243064] [2024-11-09 10:23:00,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:00,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:23:00,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:23:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:23:00,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-11-09 10:23:00,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-11-09 10:23:00,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:00,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-11-09 10:23:00,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:01,081 INFO L124 PetriNetUnfolderBase]: 599/1208 cut-off events. [2024-11-09 10:23:01,081 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2024-11-09 10:23:01,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2889 conditions, 1208 events. 599/1208 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7062 event pairs, 85 based on Foata normal form. 860/2029 useless extension candidates. Maximal degree in co-relation 1553. Up to 878 conditions per place. [2024-11-09 10:23:01,087 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 33 selfloop transitions, 2 changer transitions 2/48 dead transitions. [2024-11-09 10:23:01,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 205 flow [2024-11-09 10:23:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:23:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:23:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-11-09 10:23:01,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5987654320987654 [2024-11-09 10:23:01,090 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 124 flow. Second operand 3 states and 97 transitions. [2024-11-09 10:23:01,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 205 flow [2024-11-09 10:23:01,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:23:01,096 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 106 flow [2024-11-09 10:23:01,096 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-11-09 10:23:01,097 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -15 predicate places. [2024-11-09 10:23:01,097 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 106 flow [2024-11-09 10:23:01,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-11-09 10:23:01,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:01,098 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:23:01,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:23:01,098 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-09 10:23:01,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1370024890, now seen corresponding path program 2 times [2024-11-09 10:23:01,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:01,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234457928] [2024-11-09 10:23:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:01,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:01,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234457928] [2024-11-09 10:23:01,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234457928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:01,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:01,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:23:01,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084193365] [2024-11-09 10:23:01,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:01,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:23:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:23:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:23:01,190 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-11-09 10:23:01,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-11-09 10:23:01,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:01,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-11-09 10:23:01,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:01,240 INFO L124 PetriNetUnfolderBase]: 51/142 cut-off events. [2024-11-09 10:23:01,241 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2024-11-09 10:23:01,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 142 events. 51/142 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 511 event pairs, 6 based on Foata normal form. 74/212 useless extension candidates. Maximal degree in co-relation 244. Up to 105 conditions per place. [2024-11-09 10:23:01,242 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 19 selfloop transitions, 2 changer transitions 6/35 dead transitions. [2024-11-09 10:23:01,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 153 flow [2024-11-09 10:23:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:23:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:23:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-09 10:23:01,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2024-11-09 10:23:01,245 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 106 flow. Second operand 3 states and 85 transitions. [2024-11-09 10:23:01,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 153 flow [2024-11-09 10:23:01,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 143 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-09 10:23:01,247 INFO L231 Difference]: Finished difference. Result has 36 places, 24 transitions, 70 flow [2024-11-09 10:23:01,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=36, PETRI_TRANSITIONS=24} [2024-11-09 10:23:01,248 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -22 predicate places. [2024-11-09 10:23:01,248 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 24 transitions, 70 flow [2024-11-09 10:23:01,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-11-09 10:23:01,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:23:01,249 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:23:01,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:23:01,249 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-09 10:23:01,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:23:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash -896949869, now seen corresponding path program 1 times [2024-11-09 10:23:01,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:23:01,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993530021] [2024-11-09 10:23:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:23:01,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:23:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:23:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:23:01,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:23:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993530021] [2024-11-09 10:23:01,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993530021] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:23:01,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:23:01,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:23:01,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289595069] [2024-11-09 10:23:01,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:23:01,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:23:01,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:23:01,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:23:01,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:23:01,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-11-09 10:23:01,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 24 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2024-11-09 10:23:01,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:23:01,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-11-09 10:23:01,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:23:01,308 INFO L124 PetriNetUnfolderBase]: 31/81 cut-off events. [2024-11-09 10:23:01,308 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-09 10:23:01,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 81 events. 31/81 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 232 event pairs, 15 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 197. Up to 45 conditions per place. [2024-11-09 10:23:01,308 INFO L140 encePairwiseOnDemand]: 52/54 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2024-11-09 10:23:01,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 24 transitions, 112 flow [2024-11-09 10:23:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:23:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:23:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-09 10:23:01,309 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-11-09 10:23:01,310 INFO L175 Difference]: Start difference. First operand has 36 places, 24 transitions, 70 flow. Second operand 3 states and 69 transitions. [2024-11-09 10:23:01,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 24 transitions, 112 flow [2024-11-09 10:23:01,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 24 transitions, 102 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-09 10:23:01,310 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2024-11-09 10:23:01,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2024-11-09 10:23:01,311 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -29 predicate places. [2024-11-09 10:23:01,311 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2024-11-09 10:23:01,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2024-11-09 10:23:01,313 INFO L782 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (7 of 8 remaining) [2024-11-09 10:23:01,314 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2024-11-09 10:23:01,314 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2024-11-09 10:23:01,314 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 8 remaining) [2024-11-09 10:23:01,314 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 8 remaining) [2024-11-09 10:23:01,314 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 8 remaining) [2024-11-09 10:23:01,315 INFO L782 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2024-11-09 10:23:01,315 INFO L782 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-11-09 10:23:01,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:23:01,315 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2024-11-09 10:23:01,322 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-09 10:23:01,322 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 10:23:01,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 10:23:01 BasicIcfg [2024-11-09 10:23:01,326 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 10:23:01,327 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 10:23:01,327 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 10:23:01,327 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 10:23:01,327 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:22:58" (3/4) ... [2024-11-09 10:23:01,328 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-09 10:23:01,334 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure reader [2024-11-09 10:23:01,335 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure writer [2024-11-09 10:23:01,337 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 53 nodes and edges [2024-11-09 10:23:01,338 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-09 10:23:01,338 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-09 10:23:01,338 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-09 10:23:01,400 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-09 10:23:01,401 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-09 10:23:01,401 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 10:23:01,401 INFO L158 Benchmark]: Toolchain (without parser) took 3258.63ms. Allocated memory was 163.6MB in the beginning and 335.5MB in the end (delta: 172.0MB). Free memory was 121.2MB in the beginning and 145.8MB in the end (delta: -24.5MB). Peak memory consumption was 148.5MB. Max. memory is 16.1GB. [2024-11-09 10:23:01,401 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 81.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 10:23:01,402 INFO L158 Benchmark]: CACSL2BoogieTranslator took 391.57ms. Allocated memory is still 163.6MB. Free memory was 120.7MB in the beginning and 98.7MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-11-09 10:23:01,402 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.11ms. Allocated memory is still 163.6MB. Free memory was 98.7MB in the beginning and 96.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 10:23:01,402 INFO L158 Benchmark]: Boogie Preprocessor took 29.02ms. Allocated memory is still 163.6MB. Free memory was 96.5MB in the beginning and 94.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 10:23:01,403 INFO L158 Benchmark]: RCFGBuilder took 400.82ms. Allocated memory is still 163.6MB. Free memory was 94.5MB in the beginning and 114.4MB in the end (delta: -19.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 10:23:01,403 INFO L158 Benchmark]: TraceAbstraction took 2328.17ms. Allocated memory was 163.6MB in the beginning and 335.5MB in the end (delta: 172.0MB). Free memory was 113.4MB in the beginning and 149.9MB in the end (delta: -36.5MB). Peak memory consumption was 138.5MB. Max. memory is 16.1GB. [2024-11-09 10:23:01,403 INFO L158 Benchmark]: Witness Printer took 74.25ms. Allocated memory is still 335.5MB. Free memory was 149.9MB in the beginning and 145.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 10:23:01,404 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 81.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 391.57ms. Allocated memory is still 163.6MB. Free memory was 120.7MB in the beginning and 98.7MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.11ms. Allocated memory is still 163.6MB. Free memory was 98.7MB in the beginning and 96.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.02ms. Allocated memory is still 163.6MB. Free memory was 96.5MB in the beginning and 94.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 400.82ms. Allocated memory is still 163.6MB. Free memory was 94.5MB in the beginning and 114.4MB in the end (delta: -19.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2328.17ms. Allocated memory was 163.6MB in the beginning and 335.5MB in the end (delta: 172.0MB). Free memory was 113.4MB in the beginning and 149.9MB in the end (delta: -36.5MB). Peak memory consumption was 138.5MB. Max. memory is 16.1GB. * Witness Printer took 74.25ms. Allocated memory is still 335.5MB. Free memory was 149.9MB in the beginning and 145.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 689]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 72 locations, 8 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: 2.2s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 58 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 205 IncrementalHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 4 mSDtfsCounter, 205 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=1, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 103 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-09 10:23:01,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE