./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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-2.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 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:00:37,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:00:37,446 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:00:37,450 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:00:37,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:00:37,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:00:37,466 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:00:37,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:00:37,467 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:00:37,467 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:00:37,467 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:00:37,467 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:00:37,467 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:00:37,467 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:00:37,467 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:00:37,467 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:00:37,467 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:00:37,467 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:00:37,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:00:37,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:00:37,467 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:00:37,468 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:00:37,468 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:00:37,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:00:37,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:00:37,469 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/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 -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2025-03-17 14:00:37,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:00:37,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:00:37,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:00:37,755 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:00:37,755 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:00:37,756 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2025-03-17 14:00:38,861 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e3115a20/54ef3fa56f0b4ae99afdde1a8eac9c2f/FLAG25cf52d11 [2025-03-17 14:00:39,121 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:00:39,121 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2025-03-17 14:00:39,131 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e3115a20/54ef3fa56f0b4ae99afdde1a8eac9c2f/FLAG25cf52d11 [2025-03-17 14:00:39,433 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e3115a20/54ef3fa56f0b4ae99afdde1a8eac9c2f [2025-03-17 14:00:39,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:00:39,436 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:00:39,437 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:00:39,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:00:39,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:00:39,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@525c4489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39, skipping insertion in model container [2025-03-17 14:00:39,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,467 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:00:39,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:00:39,716 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:00:39,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:00:39,778 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:00:39,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39 WrapperNode [2025-03-17 14:00:39,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:00:39,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:00:39,780 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:00:39,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:00:39,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,797 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,813 INFO L138 Inliner]: procedures = 172, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 96 [2025-03-17 14:00:39,814 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:00:39,815 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:00:39,815 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:00:39,815 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:00:39,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,822 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,832 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-17 14:00:39,832 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,833 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,836 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,838 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,838 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,839 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:00:39,840 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:00:39,840 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:00:39,840 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:00:39,841 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (1/1) ... [2025-03-17 14:00:39,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:00:39,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:00:39,865 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) [2025-03-17 14:00:39,868 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 [2025-03-17 14:00:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:00:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:00:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2025-03-17 14:00:39,883 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2025-03-17 14:00:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:00:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:00:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:00:39,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:00:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2025-03-17 14:00:39,883 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2025-03-17 14:00:39,884 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:00:39,977 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:00:39,979 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:00:40,087 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:00:40,087 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:00:40,160 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:00:40,161 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:00:40,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:00:40 BoogieIcfgContainer [2025-03-17 14:00:40,161 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:00:40,163 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:00:40,163 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:00:40,166 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:00:40,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:00:39" (1/3) ... [2025-03-17 14:00:40,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366ebd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:00:40, skipping insertion in model container [2025-03-17 14:00:40,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:00:39" (2/3) ... [2025-03-17 14:00:40,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366ebd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:00:40, skipping insertion in model container [2025-03-17 14:00:40,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:00:40" (3/3) ... [2025-03-17 14:00:40,169 INFO L128 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2025-03-17 14:00:40,179 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:00:40,181 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG read_write_lock-2.i that has 3 procedures, 38 locations, 1 initial locations, 0 loop locations, and 2 error locations. [2025-03-17 14:00:40,182 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:00:40,235 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 14:00:40,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 62 transitions, 152 flow [2025-03-17 14:00:40,298 INFO L124 PetriNetUnfolderBase]: 4/58 cut-off events. [2025-03-17 14:00:40,302 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 14:00:40,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 58 events. 4/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2025-03-17 14:00:40,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 62 transitions, 152 flow [2025-03-17 14:00:40,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 138 flow [2025-03-17 14:00:40,319 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:00:40,328 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;@24aafe8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:00:40,328 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-17 14:00:40,345 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:00:40,345 INFO L124 PetriNetUnfolderBase]: 2/37 cut-off events. [2025-03-17 14:00:40,345 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 14:00:40,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:00:40,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:00:40,346 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:00:40,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:00:40,352 INFO L85 PathProgramCache]: Analyzing trace with hash -809659110, now seen corresponding path program 1 times [2025-03-17 14:00:40,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:00:40,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341663960] [2025-03-17 14:00:40,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:00:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:00:40,423 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:00:40,443 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:00:40,444 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:00:40,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:00:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:00:40,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:00:40,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341663960] [2025-03-17 14:00:40,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341663960] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:00:40,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:00:40,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:00:40,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205100918] [2025-03-17 14:00:40,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:00:40,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:00:40,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:00:40,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:00:40,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:00:40,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-03-17 14:00:40,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2025-03-17 14:00:40,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:00:40,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-03-17 14:00:40,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:00:44,237 INFO L124 PetriNetUnfolderBase]: 49254/70613 cut-off events. [2025-03-17 14:00:44,238 INFO L125 PetriNetUnfolderBase]: For 5350/5350 co-relation queries the response was YES. [2025-03-17 14:00:44,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140298 conditions, 70613 events. 49254/70613 cut-off events. For 5350/5350 co-relation queries the response was YES. Maximal size of possible extension queue 2287. Compared 493082 event pairs, 5837 based on Foata normal form. 5282/74938 useless extension candidates. Maximal degree in co-relation 126247. Up to 18683 conditions per place. [2025-03-17 14:00:44,633 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 256 selfloop transitions, 37 changer transitions 0/302 dead transitions. [2025-03-17 14:00:44,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 302 transitions, 1307 flow [2025-03-17 14:00:44,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:00:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:00:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 517 transitions. [2025-03-17 14:00:44,649 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.641439205955335 [2025-03-17 14:00:44,650 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 138 flow. Second operand 13 states and 517 transitions. [2025-03-17 14:00:44,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 302 transitions, 1307 flow [2025-03-17 14:00:44,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 302 transitions, 1229 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 14:00:44,750 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 353 flow [2025-03-17 14:00:44,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=353, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2025-03-17 14:00:44,756 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2025-03-17 14:00:44,756 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 353 flow [2025-03-17 14:00:44,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2025-03-17 14:00:44,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:00:44,757 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:00:44,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:00:44,758 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:00:44,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:00:44,759 INFO L85 PathProgramCache]: Analyzing trace with hash -114041437, now seen corresponding path program 1 times [2025-03-17 14:00:44,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:00:44,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29512133] [2025-03-17 14:00:44,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:00:44,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:00:44,768 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:00:44,773 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:00:44,774 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:00:44,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:00:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:00:44,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:00:44,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29512133] [2025-03-17 14:00:44,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29512133] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:00:44,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:00:44,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:00:44,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328529217] [2025-03-17 14:00:44,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:00:44,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:00:44,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:00:44,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:00:44,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:00:44,813 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-17 14:00:44,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 353 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2025-03-17 14:00:44,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:00:44,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-17 14:00:44,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:00:47,134 INFO L124 PetriNetUnfolderBase]: 34267/51230 cut-off events. [2025-03-17 14:00:47,134 INFO L125 PetriNetUnfolderBase]: For 20226/20226 co-relation queries the response was YES. [2025-03-17 14:00:47,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120384 conditions, 51230 events. 34267/51230 cut-off events. For 20226/20226 co-relation queries the response was YES. Maximal size of possible extension queue 1716. Compared 365748 event pairs, 11926 based on Foata normal form. 2768/53836 useless extension candidates. Maximal degree in co-relation 105714. Up to 25754 conditions per place. [2025-03-17 14:00:47,379 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 118 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2025-03-17 14:00:47,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 134 transitions, 761 flow [2025-03-17 14:00:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:00:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:00:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2025-03-17 14:00:47,382 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2025-03-17 14:00:47,382 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 353 flow. Second operand 3 states and 122 transitions. [2025-03-17 14:00:47,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 134 transitions, 761 flow [2025-03-17 14:00:47,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 761 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 14:00:47,817 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 369 flow [2025-03-17 14:00:47,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2025-03-17 14:00:47,818 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2025-03-17 14:00:47,818 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 369 flow [2025-03-17 14:00:47,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2025-03-17 14:00:47,818 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:00:47,818 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:00:47,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:00:47,819 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:00:47,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:00:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1058950143, now seen corresponding path program 2 times [2025-03-17 14:00:47,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:00:47,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035025444] [2025-03-17 14:00:47,819 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:00:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:00:47,827 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:00:47,833 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:00:47,833 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:00:47,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:00:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:00:47,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:00:47,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035025444] [2025-03-17 14:00:47,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035025444] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:00:47,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:00:47,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:00:47,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105490682] [2025-03-17 14:00:47,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:00:47,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:00:47,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:00:47,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:00:47,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:00:47,907 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-17 14:00:47,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2025-03-17 14:00:47,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:00:47,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-17 14:00:47,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:00:49,030 INFO L124 PetriNetUnfolderBase]: 18165/28307 cut-off events. [2025-03-17 14:00:49,031 INFO L125 PetriNetUnfolderBase]: For 19749/19756 co-relation queries the response was YES. [2025-03-17 14:00:49,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68756 conditions, 28307 events. 18165/28307 cut-off events. For 19749/19756 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 200625 event pairs, 4884 based on Foata normal form. 1729/30033 useless extension candidates. Maximal degree in co-relation 62910. Up to 11484 conditions per place. [2025-03-17 14:00:49,184 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 152 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2025-03-17 14:00:49,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 173 transitions, 994 flow [2025-03-17 14:00:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:00:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:00:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 174 transitions. [2025-03-17 14:00:49,186 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7016129032258065 [2025-03-17 14:00:49,186 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 369 flow. Second operand 4 states and 174 transitions. [2025-03-17 14:00:49,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 173 transitions, 994 flow [2025-03-17 14:00:49,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 173 transitions, 978 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:00:49,423 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 435 flow [2025-03-17 14:00:49,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2025-03-17 14:00:49,424 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2025-03-17 14:00:49,424 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 435 flow [2025-03-17 14:00:49,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2025-03-17 14:00:49,424 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:00:49,424 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:00:49,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:00:49,425 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:00:49,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:00:49,425 INFO L85 PathProgramCache]: Analyzing trace with hash 679893863, now seen corresponding path program 1 times [2025-03-17 14:00:49,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:00:49,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527215045] [2025-03-17 14:00:49,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:00:49,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:00:49,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:00:49,440 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:00:49,443 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:00:49,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:00:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:00:49,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:00:49,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527215045] [2025-03-17 14:00:49,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527215045] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:00:49,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:00:49,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:00:49,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063944101] [2025-03-17 14:00:49,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:00:49,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:00:49,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:00:49,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:00:49,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:00:49,507 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-03-17 14:00:49,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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) [2025-03-17 14:00:49,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:00:49,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-03-17 14:00:49,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:00:51,184 INFO L124 PetriNetUnfolderBase]: 23109/34872 cut-off events. [2025-03-17 14:00:51,184 INFO L125 PetriNetUnfolderBase]: For 27249/27253 co-relation queries the response was YES. [2025-03-17 14:00:51,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90817 conditions, 34872 events. 23109/34872 cut-off events. For 27249/27253 co-relation queries the response was YES. Maximal size of possible extension queue 1266. Compared 238050 event pairs, 3418 based on Foata normal form. 0/34624 useless extension candidates. Maximal degree in co-relation 84840. Up to 9700 conditions per place. [2025-03-17 14:00:51,430 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 294 selfloop transitions, 70 changer transitions 0/375 dead transitions. [2025-03-17 14:00:51,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 375 transitions, 2375 flow [2025-03-17 14:00:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:00:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:00:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 469 transitions. [2025-03-17 14:00:51,432 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5818858560794045 [2025-03-17 14:00:51,432 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 435 flow. Second operand 13 states and 469 transitions. [2025-03-17 14:00:51,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 375 transitions, 2375 flow [2025-03-17 14:00:51,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 375 transitions, 2375 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 14:00:51,893 INFO L231 Difference]: Finished difference. Result has 105 places, 157 transitions, 1038 flow [2025-03-17 14:00:51,893 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1038, PETRI_PLACES=105, PETRI_TRANSITIONS=157} [2025-03-17 14:00:51,894 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 39 predicate places. [2025-03-17 14:00:51,894 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 157 transitions, 1038 flow [2025-03-17 14:00:51,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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) [2025-03-17 14:00:51,894 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:00:51,894 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] [2025-03-17 14:00:51,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:00:51,894 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:00:51,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:00:51,894 INFO L85 PathProgramCache]: Analyzing trace with hash -832144145, now seen corresponding path program 1 times [2025-03-17 14:00:51,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:00:51,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708993553] [2025-03-17 14:00:51,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:00:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:00:51,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:00:51,902 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:00:51,902 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:00:51,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:00:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:00:51,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:00:51,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708993553] [2025-03-17 14:00:51,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708993553] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:00:51,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:00:51,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:00:51,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913731980] [2025-03-17 14:00:51,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:00:51,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:00:51,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:00:51,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:00:51,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:00:51,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-03-17 14:00:51,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 157 transitions, 1038 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2025-03-17 14:00:51,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:00:51,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-03-17 14:00:51,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:00:53,864 INFO L124 PetriNetUnfolderBase]: 23421/35356 cut-off events. [2025-03-17 14:00:53,864 INFO L125 PetriNetUnfolderBase]: For 44657/44661 co-relation queries the response was YES. [2025-03-17 14:00:54,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105329 conditions, 35356 events. 23421/35356 cut-off events. For 44657/44661 co-relation queries the response was YES. Maximal size of possible extension queue 1279. Compared 242531 event pairs, 4069 based on Foata normal form. 234/35587 useless extension candidates. Maximal degree in co-relation 99346. Up to 11446 conditions per place. [2025-03-17 14:00:54,395 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 261 selfloop transitions, 87 changer transitions 0/359 dead transitions. [2025-03-17 14:00:54,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 359 transitions, 2696 flow [2025-03-17 14:00:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:00:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:00:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 426 transitions. [2025-03-17 14:00:54,397 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5285359801488834 [2025-03-17 14:00:54,397 INFO L175 Difference]: Start difference. First operand has 105 places, 157 transitions, 1038 flow. Second operand 13 states and 426 transitions. [2025-03-17 14:00:54,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 359 transitions, 2696 flow [2025-03-17 14:00:55,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 359 transitions, 2694 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-17 14:00:55,158 INFO L231 Difference]: Finished difference. Result has 121 places, 186 transitions, 1516 flow [2025-03-17 14:00:55,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1516, PETRI_PLACES=121, PETRI_TRANSITIONS=186} [2025-03-17 14:00:55,159 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 55 predicate places. [2025-03-17 14:00:55,159 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 186 transitions, 1516 flow [2025-03-17 14:00:55,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2025-03-17 14:00:55,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:00:55,159 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] [2025-03-17 14:00:55,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:00:55,159 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:00:55,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:00:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash -15086751, now seen corresponding path program 1 times [2025-03-17 14:00:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:00:55,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697725578] [2025-03-17 14:00:55,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:00:55,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:00:55,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:00:55,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:00:55,175 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:00:55,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:00:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:00:55,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:00:55,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697725578] [2025-03-17 14:00:55,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697725578] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:00:55,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:00:55,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:00:55,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405344320] [2025-03-17 14:00:55,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:00:55,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:00:55,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:00:55,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:00:55,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:00:55,235 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-03-17 14:00:55,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 186 transitions, 1516 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2025-03-17 14:00:55,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:00:55,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-03-17 14:00:55,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:00:57,993 INFO L124 PetriNetUnfolderBase]: 24125/36199 cut-off events. [2025-03-17 14:00:57,994 INFO L125 PetriNetUnfolderBase]: For 64386/64390 co-relation queries the response was YES. [2025-03-17 14:00:58,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113045 conditions, 36199 events. 24125/36199 cut-off events. For 64386/64390 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 244918 event pairs, 4192 based on Foata normal form. 245/36441 useless extension candidates. Maximal degree in co-relation 106400. Up to 11644 conditions per place. [2025-03-17 14:00:58,349 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 286 selfloop transitions, 94 changer transitions 0/395 dead transitions. [2025-03-17 14:00:58,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 395 transitions, 3329 flow [2025-03-17 14:00:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:00:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:00:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 428 transitions. [2025-03-17 14:00:58,351 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5310173697270472 [2025-03-17 14:00:58,351 INFO L175 Difference]: Start difference. First operand has 121 places, 186 transitions, 1516 flow. Second operand 13 states and 428 transitions. [2025-03-17 14:00:58,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 395 transitions, 3329 flow [2025-03-17 14:00:59,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 395 transitions, 3310 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-03-17 14:00:59,992 INFO L231 Difference]: Finished difference. Result has 136 places, 215 transitions, 2010 flow [2025-03-17 14:00:59,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2010, PETRI_PLACES=136, PETRI_TRANSITIONS=215} [2025-03-17 14:00:59,993 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 70 predicate places. [2025-03-17 14:00:59,993 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 215 transitions, 2010 flow [2025-03-17 14:00:59,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2025-03-17 14:00:59,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:00:59,994 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:00:59,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:00:59,994 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:00:59,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:00:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2070388462, now seen corresponding path program 1 times [2025-03-17 14:00:59,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:00:59,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774070015] [2025-03-17 14:00:59,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:00:59,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:00:59,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 14:01:00,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:01:00,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:01:00,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:01:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:01:00,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:01:00,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774070015] [2025-03-17 14:01:00,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774070015] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:01:00,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:01:00,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:01:00,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86404005] [2025-03-17 14:01:00,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:01:00,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:01:00,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:01:00,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:01:00,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:01:00,068 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-17 14:01:00,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 215 transitions, 2010 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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) [2025-03-17 14:01:00,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:01:00,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-17 14:01:00,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:01:03,074 INFO L124 PetriNetUnfolderBase]: 25040/38739 cut-off events. [2025-03-17 14:01:03,074 INFO L125 PetriNetUnfolderBase]: For 92442/92534 co-relation queries the response was YES. [2025-03-17 14:01:03,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122501 conditions, 38739 events. 25040/38739 cut-off events. For 92442/92534 co-relation queries the response was YES. Maximal size of possible extension queue 1374. Compared 281090 event pairs, 5772 based on Foata normal form. 714/39432 useless extension candidates. Maximal degree in co-relation 118008. Up to 13973 conditions per place. [2025-03-17 14:01:03,382 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 336 selfloop transitions, 28 changer transitions 0/385 dead transitions. [2025-03-17 14:01:03,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 385 transitions, 3662 flow [2025-03-17 14:01:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:01:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:01:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 324 transitions. [2025-03-17 14:01:03,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2025-03-17 14:01:03,384 INFO L175 Difference]: Start difference. First operand has 136 places, 215 transitions, 2010 flow. Second operand 9 states and 324 transitions. [2025-03-17 14:01:03,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 385 transitions, 3662 flow [2025-03-17 14:01:04,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 385 transitions, 3544 flow, removed 14 selfloop flow, removed 3 redundant places. [2025-03-17 14:01:04,913 INFO L231 Difference]: Finished difference. Result has 145 places, 212 transitions, 1865 flow [2025-03-17 14:01:04,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1865, PETRI_PLACES=145, PETRI_TRANSITIONS=212} [2025-03-17 14:01:04,914 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 79 predicate places. [2025-03-17 14:01:04,914 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 212 transitions, 1865 flow [2025-03-17 14:01:04,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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) [2025-03-17 14:01:04,914 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:01:04,914 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:01:04,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:01:04,914 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:01:04,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:01:04,915 INFO L85 PathProgramCache]: Analyzing trace with hash 745608054, now seen corresponding path program 2 times [2025-03-17 14:01:04,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:01:04,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023180523] [2025-03-17 14:01:04,915 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:01:04,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:01:04,920 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 1 equivalence classes. [2025-03-17 14:01:04,925 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:01:04,926 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:01:04,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 14:01:04,926 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-17 14:01:04,930 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 14:01:04,936 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:01:04,939 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:01:04,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 14:01:04,960 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-17 14:01:04,961 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-17 14:01:04,961 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (7 of 8 remaining) [2025-03-17 14:01:04,963 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2025-03-17 14:01:04,963 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2025-03-17 14:01:04,963 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 8 remaining) [2025-03-17 14:01:04,963 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 8 remaining) [2025-03-17 14:01:04,963 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 8 remaining) [2025-03-17 14:01:04,965 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 8 remaining) [2025-03-17 14:01:04,965 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2025-03-17 14:01:04,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:01:04,965 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2025-03-17 14:01:05,010 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-17 14:01:05,010 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-17 14:01:05,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:01:05 BasicIcfg [2025-03-17 14:01:05,013 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-17 14:01:05,014 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-17 14:01:05,014 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-17 14:01:05,014 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-17 14:01:05,015 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:00:40" (3/4) ... [2025-03-17 14:01:05,016 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-17 14:01:05,016 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-17 14:01:05,020 INFO L158 Benchmark]: Toolchain (without parser) took 25584.11ms. Allocated memory was 142.6MB in the beginning and 6.5GB in the end (delta: 6.3GB). Free memory was 108.6MB in the beginning and 4.6GB in the end (delta: -4.5GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2025-03-17 14:01:05,021 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 126.2MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 14:01:05,021 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.49ms. Allocated memory is still 142.6MB. Free memory was 107.7MB in the beginning and 88.6MB in the end (delta: 19.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-03-17 14:01:05,021 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.55ms. Allocated memory is still 142.6MB. Free memory was 88.6MB in the beginning and 86.7MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 14:01:05,021 INFO L158 Benchmark]: Boogie Preprocessor took 24.49ms. Allocated memory is still 142.6MB. Free memory was 86.7MB in the beginning and 84.8MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 14:01:05,021 INFO L158 Benchmark]: IcfgBuilder took 321.33ms. Allocated memory is still 142.6MB. Free memory was 84.8MB in the beginning and 64.4MB in the end (delta: 20.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-17 14:01:05,021 INFO L158 Benchmark]: TraceAbstraction took 24850.55ms. Allocated memory was 142.6MB in the beginning and 6.5GB in the end (delta: 6.3GB). Free memory was 64.4MB in the beginning and 4.6GB in the end (delta: -4.5GB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. [2025-03-17 14:01:05,021 INFO L158 Benchmark]: Witness Printer took 5.82ms. Allocated memory is still 6.5GB. Free memory was 4.6GB in the beginning and 4.6GB in the end (delta: 138.5kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-17 14:01:05,022 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 126.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 342.49ms. Allocated memory is still 142.6MB. Free memory was 107.7MB in the beginning and 88.6MB in the end (delta: 19.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.55ms. Allocated memory is still 142.6MB. Free memory was 88.6MB in the beginning and 86.7MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 24.49ms. Allocated memory is still 142.6MB. Free memory was 86.7MB in the beginning and 84.8MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 321.33ms. Allocated memory is still 142.6MB. Free memory was 84.8MB in the beginning and 64.4MB in the end (delta: 20.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 24850.55ms. Allocated memory was 142.6MB in the beginning and 6.5GB in the end (delta: 6.3GB). Free memory was 64.4MB in the beginning and 4.6GB in the end (delta: -4.5GB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. * Witness Printer took 5.82ms. Allocated memory is still 6.5GB. Free memory was 4.6GB in the beginning and 4.6GB in the end (delta: 138.5kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 16. Possible FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, t1=-2, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, t1=-2, t2=-1, w=0, x=0, y=0] [L724] 2 int l; VAL [\old(arg)={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=0, t1=-2, t2=-1, t3=0, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=0, t1=-2, t2=-1, t3=0, t4=1, w=0, x=0, y=0] [L724] 4 int l; VAL [\old(arg)={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [\old(arg)={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [\old(arg)={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [\old(arg)={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L730] 4 y = l VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L733] 4 int ly = y; VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L743] 2 r = l VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L716] 1 x = 3 VAL [\old(arg)={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] [L738] COND TRUE 4 !(ly == lx) [L738] CALL 4 reach_error() [L16] COND FALSE 4 !(0) VAL [r=0, w=1, x=3, y=0] [L16] 4 __assert_fail ("0", "read_write_lock-2.c", 7, __extension__ __PRETTY_FUNCTION__) VAL [r=0, w=1, x=3, y=0] - UnprovableResult [Line: 747]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 749]: 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: 750]: 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: 752]: 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: 751]: 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 84 locations, 91 edges, 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: 24.7s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 23.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1007 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1003 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2848 IncrementalHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 6 mSDtfsCounter, 2848 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2010occurred in iteration=6, InterpolantAutomatonStates: 68, 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, 0.5s InterpolantComputationTime, 162 NumberOfCodeBlocks, 162 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 238 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-03-17 14:01:05,038 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:01:07,309 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:01:07,391 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-17 14:01:07,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:01:07,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:01:07,416 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:01:07,417 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:01:07,417 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:01:07,417 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:01:07,417 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:01:07,417 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:01:07,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:01:07,418 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:01:07,419 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:01:07,419 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:01:07,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-17 14:01:07,420 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:01:07,421 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:01:07,421 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:01:07,421 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:01:07,421 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:01:07,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:01:07,421 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:01:07,421 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:01:07,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:01:07,421 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:01:07,421 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:01:07,422 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-17 14:01:07,422 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-17 14:01:07,422 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:01:07,422 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:01:07,422 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:01:07,422 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:01:07,422 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/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 -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2025-03-17 14:01:07,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:01:07,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:01:07,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:01:07,654 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:01:07,654 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:01:07,656 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2025-03-17 14:01:08,806 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5872a7c/f4774745a441406392fb14024b0d937a/FLAG387473585 [2025-03-17 14:01:09,027 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:01:09,030 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2025-03-17 14:01:09,043 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5872a7c/f4774745a441406392fb14024b0d937a/FLAG387473585 [2025-03-17 14:01:09,060 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5872a7c/f4774745a441406392fb14024b0d937a [2025-03-17 14:01:09,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:01:09,063 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:01:09,065 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:01:09,065 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:01:09,068 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:01:09,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@464e9874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09, skipping insertion in model container [2025-03-17 14:01:09,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,096 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:01:09,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:01:09,368 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:01:09,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:01:09,437 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:01:09,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09 WrapperNode [2025-03-17 14:01:09,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:01:09,438 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:01:09,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:01:09,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:01:09,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,456 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,475 INFO L138 Inliner]: procedures = 173, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 97 [2025-03-17 14:01:09,476 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:01:09,477 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:01:09,477 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:01:09,477 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:01:09,482 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,484 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,492 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-17 14:01:09,493 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,494 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,497 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,498 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,499 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,499 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,501 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:01:09,501 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:01:09,502 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:01:09,502 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:01:09,502 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (1/1) ... [2025-03-17 14:01:09,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:01:09,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:01:09,529 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) [2025-03-17 14:01:09,532 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 [2025-03-17 14:01:09,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:01:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:01:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2025-03-17 14:01:09,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2025-03-17 14:01:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-17 14:01:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:01:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:01:09,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:01:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2025-03-17 14:01:09,550 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2025-03-17 14:01:09,551 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:01:09,641 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:01:09,642 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:01:09,801 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:01:09,801 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:01:09,888 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:01:09,889 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:01:09,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:01:09 BoogieIcfgContainer [2025-03-17 14:01:09,889 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:01:09,892 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:01:09,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:01:09,895 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:01:09,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:01:09" (1/3) ... [2025-03-17 14:01:09,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c73ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:01:09, skipping insertion in model container [2025-03-17 14:01:09,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:09" (2/3) ... [2025-03-17 14:01:09,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c73ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:01:09, skipping insertion in model container [2025-03-17 14:01:09,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:01:09" (3/3) ... [2025-03-17 14:01:09,900 INFO L128 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2025-03-17 14:01:09,911 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:01:09,913 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG read_write_lock-2.i that has 3 procedures, 38 locations, 1 initial locations, 0 loop locations, and 2 error locations. [2025-03-17 14:01:09,914 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:01:09,967 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 14:01:09,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 62 transitions, 152 flow [2025-03-17 14:01:10,030 INFO L124 PetriNetUnfolderBase]: 4/58 cut-off events. [2025-03-17 14:01:10,031 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 14:01:10,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 58 events. 4/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2025-03-17 14:01:10,037 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 62 transitions, 152 flow [2025-03-17 14:01:10,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 138 flow [2025-03-17 14:01:10,045 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:01:10,058 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;@71178525, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:01:10,059 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-17 14:01:10,068 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:01:10,068 INFO L124 PetriNetUnfolderBase]: 2/37 cut-off events. [2025-03-17 14:01:10,068 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 14:01:10,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:01:10,068 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:01:10,069 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:01:10,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:01:10,074 INFO L85 PathProgramCache]: Analyzing trace with hash 874623900, now seen corresponding path program 1 times [2025-03-17 14:01:10,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:01:10,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573825256] [2025-03-17 14:01:10,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:01:10,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:01:10,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:01:10,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:01:10,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:01:10,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:01:10,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:01:10,182 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:01:10,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:01:10,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 14:01:10,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:01:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:01:10,255 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:01:10,255 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:01:10,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573825256] [2025-03-17 14:01:10,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573825256] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:01:10,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:01:10,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:01:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989751462] [2025-03-17 14:01:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:01:10,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:01:10,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:01:10,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:01:10,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:01:10,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-03-17 14:01:10,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2025-03-17 14:01:10,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:01:10,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-03-17 14:01:10,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:01:14,203 INFO L124 PetriNetUnfolderBase]: 49254/70613 cut-off events. [2025-03-17 14:01:14,203 INFO L125 PetriNetUnfolderBase]: For 5350/5350 co-relation queries the response was YES. [2025-03-17 14:01:14,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140298 conditions, 70613 events. 49254/70613 cut-off events. For 5350/5350 co-relation queries the response was YES. Maximal size of possible extension queue 2287. Compared 493157 event pairs, 5837 based on Foata normal form. 5282/74938 useless extension candidates. Maximal degree in co-relation 126247. Up to 18683 conditions per place. [2025-03-17 14:01:14,828 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 256 selfloop transitions, 37 changer transitions 0/302 dead transitions. [2025-03-17 14:01:14,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 302 transitions, 1307 flow [2025-03-17 14:01:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:01:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:01:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 517 transitions. [2025-03-17 14:01:14,853 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.641439205955335 [2025-03-17 14:01:14,854 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 138 flow. Second operand 13 states and 517 transitions. [2025-03-17 14:01:14,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 302 transitions, 1307 flow [2025-03-17 14:01:15,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 302 transitions, 1229 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 14:01:15,023 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 353 flow [2025-03-17 14:01:15,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=353, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2025-03-17 14:01:15,028 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2025-03-17 14:01:15,028 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 353 flow [2025-03-17 14:01:15,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2025-03-17 14:01:15,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:01:15,028 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:01:15,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 14:01:15,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:01:15,235 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:01:15,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:01:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1741807709, now seen corresponding path program 1 times [2025-03-17 14:01:15,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:01:15,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654023022] [2025-03-17 14:01:15,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:01:15,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:01:15,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:01:15,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:01:15,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:01:15,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:01:15,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:01:15,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:01:15,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:01:15,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-17 14:01:15,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:01:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:01:15,304 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:01:15,304 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:01:15,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654023022] [2025-03-17 14:01:15,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654023022] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:01:15,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:01:15,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:01:15,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380873172] [2025-03-17 14:01:15,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:01:15,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:01:15,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:01:15,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:01:15,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:01:15,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-17 14:01:15,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 353 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2025-03-17 14:01:15,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:01:15,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-17 14:01:15,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:01:17,512 INFO L124 PetriNetUnfolderBase]: 34267/51230 cut-off events. [2025-03-17 14:01:17,512 INFO L125 PetriNetUnfolderBase]: For 20226/20226 co-relation queries the response was YES. [2025-03-17 14:01:17,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120384 conditions, 51230 events. 34267/51230 cut-off events. For 20226/20226 co-relation queries the response was YES. Maximal size of possible extension queue 1716. Compared 365769 event pairs, 11926 based on Foata normal form. 2768/53836 useless extension candidates. Maximal degree in co-relation 105714. Up to 25754 conditions per place. [2025-03-17 14:01:17,913 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 118 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2025-03-17 14:01:17,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 134 transitions, 761 flow [2025-03-17 14:01:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:01:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:01:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2025-03-17 14:01:17,916 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2025-03-17 14:01:17,916 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 353 flow. Second operand 3 states and 122 transitions. [2025-03-17 14:01:17,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 134 transitions, 761 flow [2025-03-17 14:01:18,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 761 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 14:01:18,359 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 369 flow [2025-03-17 14:01:18,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2025-03-17 14:01:18,360 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2025-03-17 14:01:18,360 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 369 flow [2025-03-17 14:01:18,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2025-03-17 14:01:18,360 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:01:18,360 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:01:18,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:01:18,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:01:18,562 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:01:18,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:01:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1608250881, now seen corresponding path program 2 times [2025-03-17 14:01:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:01:18,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582552786] [2025-03-17 14:01:18,563 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:01:18,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:01:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:01:18,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:01:18,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:01:18,616 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:01:18,622 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:01:18,622 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:01:18,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:01:18,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-17 14:01:18,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:01:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:01:18,648 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:01:18,648 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:01:18,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582552786] [2025-03-17 14:01:18,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582552786] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:01:18,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:01:18,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:01:18,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103458118] [2025-03-17 14:01:18,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:01:18,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:01:18,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:01:18,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:01:18,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:01:18,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-17 14:01:18,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2025-03-17 14:01:18,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:01:18,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-17 14:01:18,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:01:21,378 INFO L124 PetriNetUnfolderBase]: 40434/62007 cut-off events. [2025-03-17 14:01:21,379 INFO L125 PetriNetUnfolderBase]: For 41590/41597 co-relation queries the response was YES. [2025-03-17 14:01:21,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156450 conditions, 62007 events. 40434/62007 cut-off events. For 41590/41597 co-relation queries the response was YES. Maximal size of possible extension queue 2418. Compared 484323 event pairs, 14421 based on Foata normal form. 663/62538 useless extension candidates. Maximal degree in co-relation 134058. Up to 32081 conditions per place. [2025-03-17 14:01:21,693 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 172 selfloop transitions, 11 changer transitions 0/195 dead transitions. [2025-03-17 14:01:21,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 195 transitions, 1152 flow [2025-03-17 14:01:21,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:01:21,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:01:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 173 transitions. [2025-03-17 14:01:21,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6975806451612904 [2025-03-17 14:01:21,695 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 369 flow. Second operand 4 states and 173 transitions. [2025-03-17 14:01:21,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 195 transitions, 1152 flow [2025-03-17 14:01:22,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 195 transitions, 1136 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:01:22,871 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 444 flow [2025-03-17 14:01:22,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=444, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2025-03-17 14:01:22,871 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2025-03-17 14:01:22,872 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 444 flow [2025-03-17 14:01:22,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2025-03-17 14:01:22,872 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:01:22,872 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:01:22,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 14:01:23,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:01:23,072 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:01:23,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:01:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1758746985, now seen corresponding path program 1 times [2025-03-17 14:01:23,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:01:23,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659610554] [2025-03-17 14:01:23,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:01:23,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:01:23,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:01:23,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:01:23,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:01:23,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:01:23,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:01:23,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:01:23,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:01:23,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 14:01:23,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:01:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:01:23,162 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:01:23,162 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:01:23,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659610554] [2025-03-17 14:01:23,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659610554] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:01:23,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:01:23,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:01:23,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913275723] [2025-03-17 14:01:23,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:01:23,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:01:23,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:01:23,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:01:23,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:01:23,165 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-03-17 14:01:23,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 444 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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) [2025-03-17 14:01:23,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:01:23,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-03-17 14:01:23,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:01:29,049 INFO L124 PetriNetUnfolderBase]: 84267/124012 cut-off events. [2025-03-17 14:01:29,050 INFO L125 PetriNetUnfolderBase]: For 99839/99883 co-relation queries the response was YES. [2025-03-17 14:01:29,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325329 conditions, 124012 events. 84267/124012 cut-off events. For 99839/99883 co-relation queries the response was YES. Maximal size of possible extension queue 4868. Compared 977438 event pairs, 12451 based on Foata normal form. 41/122018 useless extension candidates. Maximal degree in co-relation 281933. Up to 31079 conditions per place. [2025-03-17 14:01:29,865 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 385 selfloop transitions, 153 changer transitions 0/549 dead transitions. [2025-03-17 14:01:29,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 549 transitions, 3607 flow [2025-03-17 14:01:29,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:01:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:01:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 483 transitions. [2025-03-17 14:01:29,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5992555831265509 [2025-03-17 14:01:29,868 INFO L175 Difference]: Start difference. First operand has 82 places, 100 transitions, 444 flow. Second operand 13 states and 483 transitions. [2025-03-17 14:01:29,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 549 transitions, 3607 flow [2025-03-17 14:01:34,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 549 transitions, 3589 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-03-17 14:01:34,613 INFO L231 Difference]: Finished difference. Result has 102 places, 275 transitions, 2009 flow [2025-03-17 14:01:34,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2009, PETRI_PLACES=102, PETRI_TRANSITIONS=275} [2025-03-17 14:01:34,614 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 36 predicate places. [2025-03-17 14:01:34,614 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 275 transitions, 2009 flow [2025-03-17 14:01:34,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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) [2025-03-17 14:01:34,614 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:01:34,614 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] [2025-03-17 14:01:34,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 14:01:34,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:01:34,815 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-17 14:01:34,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:01:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash 463641201, now seen corresponding path program 1 times [2025-03-17 14:01:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:01:34,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417315603] [2025-03-17 14:01:34,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:01:34,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:01:34,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:01:34,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:01:34,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:01:34,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:01:34,875 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:01:34,875 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:01:34,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:01:34,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 14:01:34,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:01:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:01:34,907 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:01:34,907 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:01:34,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417315603] [2025-03-17 14:01:34,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417315603] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:01:34,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:01:34,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:01:34,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876593126] [2025-03-17 14:01:34,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:01:34,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:01:34,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:01:34,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:01:34,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:01:34,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-03-17 14:01:34,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 275 transitions, 2009 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2025-03-17 14:01:34,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:01:34,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-03-17 14:01:34,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:01:43,572 INFO L124 PetriNetUnfolderBase]: 88601/130462 cut-off events. [2025-03-17 14:01:43,572 INFO L125 PetriNetUnfolderBase]: For 176053/176056 co-relation queries the response was YES. [2025-03-17 14:01:44,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397547 conditions, 130462 events. 88601/130462 cut-off events. For 176053/176056 co-relation queries the response was YES. Maximal size of possible extension queue 5113. Compared 1039745 event pairs, 13955 based on Foata normal form. 1058/131367 useless extension candidates. Maximal degree in co-relation 352121. Up to 37145 conditions per place. [2025-03-17 14:01:44,982 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 369 selfloop transitions, 223 changer transitions 0/603 dead transitions. [2025-03-17 14:01:44,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 603 transitions, 4981 flow [2025-03-17 14:01:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:01:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:01:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 460 transitions. [2025-03-17 14:01:44,984 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5707196029776674 [2025-03-17 14:01:44,984 INFO L175 Difference]: Start difference. First operand has 102 places, 275 transitions, 2009 flow. Second operand 13 states and 460 transitions. [2025-03-17 14:01:44,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 603 transitions, 4981 flow