./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 c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G 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-?-c00e63d-m [2025-02-06 12:35:41,216 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:35:41,289 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:35:41,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:35:41,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:35:41,324 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:35:41,325 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:35:41,325 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:35:41,325 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:35:41,326 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:35:41,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:35:41,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:35:41,326 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:35:41,326 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:35:41,326 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:35:41,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:35:41,327 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:35:41,327 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:35:41,328 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:35:41,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:35:41,328 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:35:41,329 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:35:41,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:35:41,329 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:35:41,330 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:35:41,330 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:35:41,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:35:41,330 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:35:41,330 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:35:41,330 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:35:41,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:35:41,330 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G 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 [2025-02-06 12:35:41,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:35:41,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:35:41,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:35:41,625 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:35:41,625 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:35:41,626 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2025-02-06 12:35:43,108 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/80803d202/fd8ef6d8d1f14dfb9cc1b2f8769780ff/FLAG40d4b92a9 [2025-02-06 12:35:43,486 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:35:43,488 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2025-02-06 12:35:43,506 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/80803d202/fd8ef6d8d1f14dfb9cc1b2f8769780ff/FLAG40d4b92a9 [2025-02-06 12:35:43,686 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/80803d202/fd8ef6d8d1f14dfb9cc1b2f8769780ff [2025-02-06 12:35:43,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:35:43,691 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:35:43,692 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:35:43,693 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:35:43,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:35:43,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:35:43" (1/1) ... [2025-02-06 12:35:43,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cec9b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:43, skipping insertion in model container [2025-02-06 12:35:43,700 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:35:43" (1/1) ... [2025-02-06 12:35:43,735 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:35:43,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:35:44,002 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:35:44,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:35:44,102 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:35:44,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44 WrapperNode [2025-02-06 12:35:44,104 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:35:44,105 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:35:44,105 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:35:44,105 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:35:44,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,120 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,140 INFO L138 Inliner]: procedures = 172, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 96 [2025-02-06 12:35:44,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:35:44,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:35:44,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:35:44,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:35:44,148 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,153 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,171 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]. [2025-02-06 12:35:44,171 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,171 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,176 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,178 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,181 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:35:44,182 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:35:44,182 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:35:44,182 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:35:44,183 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (1/1) ... [2025-02-06 12:35:44,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:35:44,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:35:44,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 12:35:44,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 12:35:44,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 12:35:44,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:35:44,257 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2025-02-06 12:35:44,257 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2025-02-06 12:35:44,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 12:35:44,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 12:35:44,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:35:44,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:35:44,257 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2025-02-06 12:35:44,257 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2025-02-06 12:35:44,259 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:35:44,376 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:35:44,377 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:35:44,515 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:35:44,515 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:35:44,609 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:35:44,609 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:35:44,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:35:44 BoogieIcfgContainer [2025-02-06 12:35:44,610 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:35:44,612 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:35:44,613 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:35:44,617 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:35:44,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:35:43" (1/3) ... [2025-02-06 12:35:44,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da3070e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:35:44, skipping insertion in model container [2025-02-06 12:35:44,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:35:44" (2/3) ... [2025-02-06 12:35:44,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da3070e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:35:44, skipping insertion in model container [2025-02-06 12:35:44,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:35:44" (3/3) ... [2025-02-06 12:35:44,621 INFO L128 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2025-02-06 12:35:44,637 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:35:44,639 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. [2025-02-06 12:35:44,640 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:35:44,711 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-06 12:35:44,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 62 transitions, 152 flow [2025-02-06 12:35:44,788 INFO L124 PetriNetUnfolderBase]: 4/58 cut-off events. [2025-02-06 12:35:44,792 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 12:35:44,798 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. [2025-02-06 12:35:44,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 62 transitions, 152 flow [2025-02-06 12:35:44,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 138 flow [2025-02-06 12:35:44,812 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:35:44,824 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;@647feeaa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:35:44,825 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-02-06 12:35:44,843 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:35:44,844 INFO L124 PetriNetUnfolderBase]: 2/37 cut-off events. [2025-02-06 12:35:44,844 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 12:35:44,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:35:44,845 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:35:44,845 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:35:44,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:35:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1872889451, now seen corresponding path program 1 times [2025-02-06 12:35:44,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:35:44,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769121258] [2025-02-06 12:35:44,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:35:44,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:35:44,936 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 12:35:44,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 12:35:44,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:35:44,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:35:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:35:45,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:35:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769121258] [2025-02-06 12:35:45,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769121258] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:35:45,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:35:45,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:35:45,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448039304] [2025-02-06 12:35:45,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:35:45,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:35:45,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:35:45,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:35:45,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:35:45,195 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-02-06 12:35:45,197 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) [2025-02-06 12:35:45,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:35:45,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-02-06 12:35:45,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:35:50,314 INFO L124 PetriNetUnfolderBase]: 49254/70613 cut-off events. [2025-02-06 12:35:50,314 INFO L125 PetriNetUnfolderBase]: For 5350/5350 co-relation queries the response was YES. [2025-02-06 12:35:50,540 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 2279. Compared 493785 event pairs, 5837 based on Foata normal form. 5282/74939 useless extension candidates. Maximal degree in co-relation 126247. Up to 18683 conditions per place. [2025-02-06 12:35:51,108 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 256 selfloop transitions, 37 changer transitions 0/302 dead transitions. [2025-02-06 12:35:51,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 302 transitions, 1307 flow [2025-02-06 12:35:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 12:35:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 12:35:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 517 transitions. [2025-02-06 12:35:51,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.641439205955335 [2025-02-06 12:35:51,133 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 138 flow. Second operand 13 states and 517 transitions. [2025-02-06 12:35:51,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 302 transitions, 1307 flow [2025-02-06 12:35:51,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 302 transitions, 1229 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 12:35:51,363 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 353 flow [2025-02-06 12:35:51,365 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} [2025-02-06 12:35:51,369 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2025-02-06 12:35:51,371 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 353 flow [2025-02-06 12:35:51,371 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) [2025-02-06 12:35:51,371 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:35:51,371 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:35:51,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 12:35:51,372 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:35:51,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:35:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1727648956, now seen corresponding path program 1 times [2025-02-06 12:35:51,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:35:51,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052810317] [2025-02-06 12:35:51,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:35:51,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:35:51,389 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 12:35:51,400 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 12:35:51,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:35:51,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:35:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:35:51,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:35:51,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052810317] [2025-02-06 12:35:51,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052810317] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:35:51,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:35:51,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:35:51,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755931680] [2025-02-06 12:35:51,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:35:51,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:35:51,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:35:51,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:35:51,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:35:51,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-06 12:35:51,487 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) [2025-02-06 12:35:51,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:35:51,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-06 12:35:51,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:35:54,432 INFO L124 PetriNetUnfolderBase]: 34267/51230 cut-off events. [2025-02-06 12:35:54,433 INFO L125 PetriNetUnfolderBase]: For 20226/20226 co-relation queries the response was YES. [2025-02-06 12:35:54,535 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 1715. Compared 365933 event pairs, 11926 based on Foata normal form. 2768/53835 useless extension candidates. Maximal degree in co-relation 105714. Up to 25754 conditions per place. [2025-02-06 12:35:54,745 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 118 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2025-02-06 12:35:54,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 134 transitions, 761 flow [2025-02-06 12:35:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:35:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:35:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2025-02-06 12:35:54,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2025-02-06 12:35:54,747 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 353 flow. Second operand 3 states and 122 transitions. [2025-02-06 12:35:54,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 134 transitions, 761 flow [2025-02-06 12:35:55,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 761 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 12:35:55,218 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 369 flow [2025-02-06 12:35:55,218 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} [2025-02-06 12:35:55,218 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2025-02-06 12:35:55,219 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 369 flow [2025-02-06 12:35:55,219 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) [2025-02-06 12:35:55,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:35:55,219 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:35:55,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 12:35:55,219 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:35:55,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:35:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1086056794, now seen corresponding path program 2 times [2025-02-06 12:35:55,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:35:55,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805508856] [2025-02-06 12:35:55,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:35:55,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:35:55,234 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 1 equivalence classes. [2025-02-06 12:35:55,241 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 12:35:55,242 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 12:35:55,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:35:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:35:55,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:35:55,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805508856] [2025-02-06 12:35:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805508856] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:35:55,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:35:55,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:35:55,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698058065] [2025-02-06 12:35:55,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:35:55,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:35:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:35:55,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:35:55,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:35:55,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-06 12:35:55,329 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) [2025-02-06 12:35:55,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:35:55,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-06 12:35:55,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:35:56,888 INFO L124 PetriNetUnfolderBase]: 18165/28309 cut-off events. [2025-02-06 12:35:56,888 INFO L125 PetriNetUnfolderBase]: For 19765/19772 co-relation queries the response was YES. [2025-02-06 12:35:56,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68758 conditions, 28309 events. 18165/28309 cut-off events. For 19765/19772 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 200666 event pairs, 4884 based on Foata normal form. 1729/30032 useless extension candidates. Maximal degree in co-relation 62912. Up to 11484 conditions per place. [2025-02-06 12:35:57,057 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 152 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2025-02-06 12:35:57,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 173 transitions, 994 flow [2025-02-06 12:35:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:35:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:35:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 174 transitions. [2025-02-06 12:35:57,059 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7016129032258065 [2025-02-06 12:35:57,059 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 369 flow. Second operand 4 states and 174 transitions. [2025-02-06 12:35:57,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 173 transitions, 994 flow [2025-02-06 12:35:57,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 173 transitions, 978 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:35:57,478 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 435 flow [2025-02-06 12:35:57,478 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} [2025-02-06 12:35:57,479 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2025-02-06 12:35:57,479 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 435 flow [2025-02-06 12:35:57,479 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) [2025-02-06 12:35:57,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:35:57,479 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:35:57,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 12:35:57,480 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:35:57,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:35:57,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1973663013, now seen corresponding path program 1 times [2025-02-06 12:35:57,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:35:57,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354814702] [2025-02-06 12:35:57,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:35:57,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:35:57,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 12:35:57,491 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 12:35:57,491 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:35:57,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:35:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:35:57,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:35:57,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354814702] [2025-02-06 12:35:57,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354814702] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:35:57,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:35:57,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:35:57,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54431884] [2025-02-06 12:35:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:35:57,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:35:57,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:35:57,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:35:57,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:35:57,551 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-02-06 12:35:57,552 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) [2025-02-06 12:35:57,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:35:57,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-02-06 12:35:57,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:35:59,740 INFO L124 PetriNetUnfolderBase]: 23109/34872 cut-off events. [2025-02-06 12:35:59,740 INFO L125 PetriNetUnfolderBase]: For 27262/27266 co-relation queries the response was YES. [2025-02-06 12:35:59,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90817 conditions, 34872 events. 23109/34872 cut-off events. For 27262/27266 co-relation queries the response was YES. Maximal size of possible extension queue 1268. Compared 238198 event pairs, 3418 based on Foata normal form. 0/34625 useless extension candidates. Maximal degree in co-relation 84840. Up to 9700 conditions per place. [2025-02-06 12:35:59,939 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 294 selfloop transitions, 70 changer transitions 0/375 dead transitions. [2025-02-06 12:35:59,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 375 transitions, 2375 flow [2025-02-06 12:35:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 12:35:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 12:35:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 469 transitions. [2025-02-06 12:35:59,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5818858560794045 [2025-02-06 12:35:59,941 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 435 flow. Second operand 13 states and 469 transitions. [2025-02-06 12:35:59,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 375 transitions, 2375 flow [2025-02-06 12:36:00,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 375 transitions, 2375 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 12:36:00,275 INFO L231 Difference]: Finished difference. Result has 105 places, 157 transitions, 1038 flow [2025-02-06 12:36:00,275 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} [2025-02-06 12:36:00,276 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 39 predicate places. [2025-02-06 12:36:00,276 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 157 transitions, 1038 flow [2025-02-06 12:36:00,276 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) [2025-02-06 12:36:00,276 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:36:00,276 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:36:00,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 12:36:00,277 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:36:00,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:36:00,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1944693381, now seen corresponding path program 1 times [2025-02-06 12:36:00,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:36:00,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877956289] [2025-02-06 12:36:00,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:36:00,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:36:00,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 12:36:00,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 12:36:00,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:36:00,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:36:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:36:00,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:36:00,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877956289] [2025-02-06 12:36:00,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877956289] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:36:00,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:36:00,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:36:00,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433633321] [2025-02-06 12:36:00,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:36:00,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:36:00,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:36:00,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:36:00,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:36:00,373 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-02-06 12:36:00,374 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) [2025-02-06 12:36:00,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:36:00,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-02-06 12:36:00,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:36:03,205 INFO L124 PetriNetUnfolderBase]: 23421/35356 cut-off events. [2025-02-06 12:36:03,205 INFO L125 PetriNetUnfolderBase]: For 44603/44607 co-relation queries the response was YES. [2025-02-06 12:36:03,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105329 conditions, 35356 events. 23421/35356 cut-off events. For 44603/44607 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 242686 event pairs, 4069 based on Foata normal form. 234/35588 useless extension candidates. Maximal degree in co-relation 99346. Up to 11446 conditions per place. [2025-02-06 12:36:03,622 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 261 selfloop transitions, 87 changer transitions 0/359 dead transitions. [2025-02-06 12:36:03,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 359 transitions, 2696 flow [2025-02-06 12:36:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 12:36:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 12:36:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 426 transitions. [2025-02-06 12:36:03,624 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5285359801488834 [2025-02-06 12:36:03,624 INFO L175 Difference]: Start difference. First operand has 105 places, 157 transitions, 1038 flow. Second operand 13 states and 426 transitions. [2025-02-06 12:36:03,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 359 transitions, 2696 flow [2025-02-06 12:36:04,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 359 transitions, 2694 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-02-06 12:36:04,342 INFO L231 Difference]: Finished difference. Result has 121 places, 186 transitions, 1516 flow [2025-02-06 12:36:04,342 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} [2025-02-06 12:36:04,343 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 55 predicate places. [2025-02-06 12:36:04,343 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 186 transitions, 1516 flow [2025-02-06 12:36:04,343 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) [2025-02-06 12:36:04,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:36:04,343 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:36:04,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 12:36:04,344 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:36:04,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:36:04,344 INFO L85 PathProgramCache]: Analyzing trace with hash -177396787, now seen corresponding path program 1 times [2025-02-06 12:36:04,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:36:04,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583778796] [2025-02-06 12:36:04,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:36:04,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:36:04,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 12:36:04,360 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 12:36:04,360 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:36:04,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:36:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:36:04,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:36:04,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583778796] [2025-02-06 12:36:04,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583778796] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:36:04,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:36:04,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:36:04,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558680820] [2025-02-06 12:36:04,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:36:04,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:36:04,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:36:04,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:36:04,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:36:04,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-02-06 12:36:04,427 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) [2025-02-06 12:36:04,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:36:04,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-02-06 12:36:04,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:36:07,741 INFO L124 PetriNetUnfolderBase]: 24125/36201 cut-off events. [2025-02-06 12:36:07,741 INFO L125 PetriNetUnfolderBase]: For 64415/64419 co-relation queries the response was YES. [2025-02-06 12:36:07,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113053 conditions, 36201 events. 24125/36201 cut-off events. For 64415/64419 co-relation queries the response was YES. Maximal size of possible extension queue 1306. Compared 245448 event pairs, 4175 based on Foata normal form. 245/36444 useless extension candidates. Maximal degree in co-relation 106408. Up to 11644 conditions per place. [2025-02-06 12:36:07,991 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 286 selfloop transitions, 94 changer transitions 0/395 dead transitions. [2025-02-06 12:36:07,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 395 transitions, 3329 flow [2025-02-06 12:36:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 12:36:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 12:36:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 428 transitions. [2025-02-06 12:36:07,993 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5310173697270472 [2025-02-06 12:36:07,993 INFO L175 Difference]: Start difference. First operand has 121 places, 186 transitions, 1516 flow. Second operand 13 states and 428 transitions. [2025-02-06 12:36:07,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 395 transitions, 3329 flow [2025-02-06 12:36:09,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 395 transitions, 3310 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-02-06 12:36:09,435 INFO L231 Difference]: Finished difference. Result has 136 places, 215 transitions, 2010 flow [2025-02-06 12:36:09,435 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} [2025-02-06 12:36:09,436 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 70 predicate places. [2025-02-06 12:36:09,436 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 215 transitions, 2010 flow [2025-02-06 12:36:09,436 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) [2025-02-06 12:36:09,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:36:09,436 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] [2025-02-06 12:36:09,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 12:36:09,437 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:36:09,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:36:09,437 INFO L85 PathProgramCache]: Analyzing trace with hash 323613961, now seen corresponding path program 1 times [2025-02-06 12:36:09,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:36:09,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725411203] [2025-02-06 12:36:09,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:36:09,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:36:09,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 12:36:09,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 12:36:09,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:36:09,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:36:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:36:09,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:36:09,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725411203] [2025-02-06 12:36:09,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725411203] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:36:09,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:36:09,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 12:36:09,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199818926] [2025-02-06 12:36:09,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:36:09,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:36:09,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:36:09,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:36:09,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:36:09,541 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-06 12:36:09,541 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) [2025-02-06 12:36:09,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:36:09,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-06 12:36:09,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:36:12,841 INFO L124 PetriNetUnfolderBase]: 25040/38741 cut-off events. [2025-02-06 12:36:12,842 INFO L125 PetriNetUnfolderBase]: For 92436/92529 co-relation queries the response was YES. [2025-02-06 12:36:13,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122503 conditions, 38741 events. 25040/38741 cut-off events. For 92436/92529 co-relation queries the response was YES. Maximal size of possible extension queue 1374. Compared 281469 event pairs, 5772 based on Foata normal form. 715/39432 useless extension candidates. Maximal degree in co-relation 118010. Up to 13973 conditions per place. [2025-02-06 12:36:13,179 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 336 selfloop transitions, 28 changer transitions 0/385 dead transitions. [2025-02-06 12:36:13,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 385 transitions, 3662 flow [2025-02-06 12:36:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 12:36:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 12:36:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 324 transitions. [2025-02-06 12:36:13,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2025-02-06 12:36:13,182 INFO L175 Difference]: Start difference. First operand has 136 places, 215 transitions, 2010 flow. Second operand 9 states and 324 transitions. [2025-02-06 12:36:13,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 385 transitions, 3662 flow [2025-02-06 12:36:14,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 385 transitions, 3544 flow, removed 14 selfloop flow, removed 3 redundant places. [2025-02-06 12:36:14,670 INFO L231 Difference]: Finished difference. Result has 145 places, 212 transitions, 1865 flow [2025-02-06 12:36:14,670 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} [2025-02-06 12:36:14,671 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 79 predicate places. [2025-02-06 12:36:14,671 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 212 transitions, 1865 flow [2025-02-06 12:36:14,671 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) [2025-02-06 12:36:14,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:36:14,672 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] [2025-02-06 12:36:14,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 12:36:14,672 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:36:14,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:36:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1774277855, now seen corresponding path program 2 times [2025-02-06 12:36:14,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:36:14,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234285748] [2025-02-06 12:36:14,673 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:36:14,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:36:14,678 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 1 equivalence classes. [2025-02-06 12:36:14,684 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 12:36:14,684 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 12:36:14,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 12:36:14,685 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 12:36:14,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 12:36:14,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 12:36:14,701 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:36:14,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 12:36:14,729 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 12:36:14,729 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 12:36:14,730 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (7 of 8 remaining) [2025-02-06 12:36:14,733 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2025-02-06 12:36:14,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2025-02-06 12:36:14,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 8 remaining) [2025-02-06 12:36:14,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 8 remaining) [2025-02-06 12:36:14,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 8 remaining) [2025-02-06 12:36:14,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 8 remaining) [2025-02-06 12:36:14,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2025-02-06 12:36:14,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 12:36:14,736 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2025-02-06 12:36:14,787 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 12:36:14,790 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 12:36:14,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 12:36:14 BasicIcfg [2025-02-06 12:36:14,797 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 12:36:14,798 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 12:36:14,798 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 12:36:14,798 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 12:36:14,799 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:35:44" (3/4) ... [2025-02-06 12:36:14,800 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-02-06 12:36:14,801 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 12:36:14,802 INFO L158 Benchmark]: Toolchain (without parser) took 31111.12ms. Allocated memory was 142.6MB in the beginning and 10.2GB in the end (delta: 10.0GB). Free memory was 111.3MB in the beginning and 8.2GB in the end (delta: -8.1GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2025-02-06 12:36:14,802 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 226.5MB. Free memory was 147.6MB in the beginning and 147.3MB in the end (delta: 293.6kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:36:14,802 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.91ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 91.7MB in the end (delta: 19.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 12:36:14,802 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.78ms. Allocated memory is still 142.6MB. Free memory was 91.7MB in the beginning and 90.2MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 12:36:14,802 INFO L158 Benchmark]: Boogie Preprocessor took 39.97ms. Allocated memory is still 142.6MB. Free memory was 90.2MB in the beginning and 88.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:36:14,803 INFO L158 Benchmark]: IcfgBuilder took 428.27ms. Allocated memory is still 142.6MB. Free memory was 88.5MB in the beginning and 68.1MB in the end (delta: 20.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 12:36:14,803 INFO L158 Benchmark]: TraceAbstraction took 30184.98ms. Allocated memory was 142.6MB in the beginning and 10.2GB in the end (delta: 10.0GB). Free memory was 67.6MB in the beginning and 8.2GB in the end (delta: -8.2GB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. [2025-02-06 12:36:14,803 INFO L158 Benchmark]: Witness Printer took 3.09ms. Allocated memory is still 10.2GB. Free memory was 8.2GB in the beginning and 8.2GB in the end (delta: 162.2kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 12:36:14,804 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 226.5MB. Free memory was 147.6MB in the beginning and 147.3MB in the end (delta: 293.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 411.91ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 91.7MB in the end (delta: 19.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.78ms. Allocated memory is still 142.6MB. Free memory was 91.7MB in the beginning and 90.2MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.97ms. Allocated memory is still 142.6MB. Free memory was 90.2MB in the beginning and 88.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 428.27ms. Allocated memory is still 142.6MB. Free memory was 88.5MB in the beginning and 68.1MB in the end (delta: 20.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 30184.98ms. Allocated memory was 142.6MB in the beginning and 10.2GB in the end (delta: 10.0GB). Free memory was 67.6MB in the beginning and 8.2GB in the end (delta: -8.2GB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. * Witness Printer took 3.09ms. Allocated memory is still 10.2GB. Free memory was 8.2GB in the beginning and 8.2GB in the end (delta: 162.2kB). There was no memory consumed. 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=-3, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, t1=-3, t2=-2, 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=-3, t2=-2, t3=-1, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=0, t1=-3, t2=-2, t3=-1, t4=0, 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=0, 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: 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. - 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 84 locations, 8 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 30.0s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 28.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1007 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1003 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 1.6s 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, 0.4s 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, 0.6s 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 [2025-02-06 12:36:14,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/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-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G 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-?-c00e63d-m [2025-02-06 12:36:17,497 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:36:17,593 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-02-06 12:36:17,598 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:36:17,598 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:36:17,640 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:36:17,641 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:36:17,641 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:36:17,641 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:36:17,641 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:36:17,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:36:17,642 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:36:17,642 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:36:17,642 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:36:17,642 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:36:17,642 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:36:17,642 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:36:17,642 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:36:17,644 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:36:17,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:36:17,645 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:36:17,645 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:36:17,645 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:36:17,645 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:36:17,645 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:36:17,645 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-02-06 12:36:17,645 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-02-06 12:36:17,645 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:36:17,646 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:36:17,646 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:36:17,647 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:36:17,647 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:36:17,655 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:36:17,655 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:36:17,656 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:36:17,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:36:17,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:36:17,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:36:17,656 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-02-06 12:36:17,656 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-02-06 12:36:17,656 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:36:17,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:36:17,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:36:17,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:36:17,656 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G 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 [2025-02-06 12:36:17,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:36:17,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:36:17,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:36:17,952 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:36:17,952 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:36:17,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2025-02-06 12:36:19,287 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b9bcb4307/6a5cef6b796f41b582f60aced42037a9/FLAG002c5f73b [2025-02-06 12:36:19,638 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:36:19,640 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2025-02-06 12:36:19,657 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b9bcb4307/6a5cef6b796f41b582f60aced42037a9/FLAG002c5f73b [2025-02-06 12:36:19,678 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b9bcb4307/6a5cef6b796f41b582f60aced42037a9 [2025-02-06 12:36:19,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:36:19,685 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:36:19,686 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:36:19,686 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:36:19,690 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:36:19,691 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:36:19" (1/1) ... [2025-02-06 12:36:19,693 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39543df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:19, skipping insertion in model container [2025-02-06 12:36:19,693 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:36:19" (1/1) ... [2025-02-06 12:36:19,729 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:36:20,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:36:20,086 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:36:20,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:36:20,179 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:36:20,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20 WrapperNode [2025-02-06 12:36:20,180 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:36:20,181 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:36:20,181 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:36:20,181 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:36:20,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,204 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,226 INFO L138 Inliner]: procedures = 173, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 97 [2025-02-06 12:36:20,227 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:36:20,227 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:36:20,227 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:36:20,228 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:36:20,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,238 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,262 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]. [2025-02-06 12:36:20,262 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,268 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,269 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,271 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,272 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,274 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:36:20,274 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:36:20,275 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:36:20,275 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:36:20,276 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (1/1) ... [2025-02-06 12:36:20,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:36:20,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:36:20,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 12:36:20,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 12:36:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 12:36:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:36:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2025-02-06 12:36:20,334 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2025-02-06 12:36:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-02-06 12:36:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 12:36:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:36:20,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:36:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2025-02-06 12:36:20,334 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2025-02-06 12:36:20,335 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:36:20,449 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:36:20,451 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:36:20,619 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:36:20,620 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:36:20,781 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:36:20,782 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:36:20,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:36:20 BoogieIcfgContainer [2025-02-06 12:36:20,782 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:36:20,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:36:20,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:36:20,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:36:20,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:36:19" (1/3) ... [2025-02-06 12:36:20,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1470cfe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:36:20, skipping insertion in model container [2025-02-06 12:36:20,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:36:20" (2/3) ... [2025-02-06 12:36:20,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1470cfe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:36:20, skipping insertion in model container [2025-02-06 12:36:20,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:36:20" (3/3) ... [2025-02-06 12:36:20,794 INFO L128 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2025-02-06 12:36:20,808 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:36:20,810 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. [2025-02-06 12:36:20,811 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:36:20,889 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-06 12:36:20,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 62 transitions, 152 flow [2025-02-06 12:36:20,964 INFO L124 PetriNetUnfolderBase]: 4/58 cut-off events. [2025-02-06 12:36:20,968 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 12:36:20,973 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. [2025-02-06 12:36:20,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 62 transitions, 152 flow [2025-02-06 12:36:20,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 57 transitions, 138 flow [2025-02-06 12:36:20,988 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:36:20,999 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;@7387b82a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:36:20,999 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-02-06 12:36:21,014 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:36:21,016 INFO L124 PetriNetUnfolderBase]: 2/37 cut-off events. [2025-02-06 12:36:21,017 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 12:36:21,017 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:36:21,017 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:36:21,018 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:36:21,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:36:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash -737794835, now seen corresponding path program 1 times [2025-02-06 12:36:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:36:21,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864115042] [2025-02-06 12:36:21,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:36:21,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:36:21,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:36:21,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:36:21,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 12:36:21,125 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 12:36:21,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 12:36:21,141 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:36:21,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:36:21,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 12:36:21,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:36:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:36:21,225 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:36:21,226 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:36:21,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864115042] [2025-02-06 12:36:21,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864115042] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:36:21,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:36:21,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:36:21,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81135103] [2025-02-06 12:36:21,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:36:21,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:36:21,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:36:21,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:36:21,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:36:21,269 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-02-06 12:36:21,271 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) [2025-02-06 12:36:21,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:36:21,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-02-06 12:36:21,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:36:26,410 INFO L124 PetriNetUnfolderBase]: 49254/70613 cut-off events. [2025-02-06 12:36:26,410 INFO L125 PetriNetUnfolderBase]: For 5350/5350 co-relation queries the response was YES. [2025-02-06 12:36:26,543 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 2279. Compared 493684 event pairs, 5837 based on Foata normal form. 5282/74939 useless extension candidates. Maximal degree in co-relation 126247. Up to 18683 conditions per place. [2025-02-06 12:36:26,880 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 256 selfloop transitions, 37 changer transitions 0/302 dead transitions. [2025-02-06 12:36:26,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 302 transitions, 1307 flow [2025-02-06 12:36:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 12:36:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 12:36:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 517 transitions. [2025-02-06 12:36:26,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.641439205955335 [2025-02-06 12:36:26,997 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 138 flow. Second operand 13 states and 517 transitions. [2025-02-06 12:36:26,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 302 transitions, 1307 flow [2025-02-06 12:36:27,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 302 transitions, 1229 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 12:36:27,174 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 353 flow [2025-02-06 12:36:27,177 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} [2025-02-06 12:36:27,180 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2025-02-06 12:36:27,181 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 353 flow [2025-02-06 12:36:27,181 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) [2025-02-06 12:36:27,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:36:27,181 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:36:27,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 12:36:27,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:36:27,384 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:36:27,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:36:27,384 INFO L85 PathProgramCache]: Analyzing trace with hash 99882684, now seen corresponding path program 1 times [2025-02-06 12:36:27,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:36:27,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046481909] [2025-02-06 12:36:27,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:36:27,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:36:27,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:36:27,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:36:27,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 12:36:27,449 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 12:36:27,459 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 12:36:27,459 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:36:27,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:36:27,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-06 12:36:27,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:36:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:36:27,478 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:36:27,478 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:36:27,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046481909] [2025-02-06 12:36:27,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046481909] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:36:27,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:36:27,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:36:27,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190848056] [2025-02-06 12:36:27,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:36:27,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:36:27,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:36:27,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:36:27,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:36:27,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-06 12:36:27,482 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) [2025-02-06 12:36:27,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:36:27,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-06 12:36:27,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:36:30,158 INFO L124 PetriNetUnfolderBase]: 34267/51230 cut-off events. [2025-02-06 12:36:30,158 INFO L125 PetriNetUnfolderBase]: For 20226/20226 co-relation queries the response was YES. [2025-02-06 12:36:30,273 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 1715. Compared 366062 event pairs, 11926 based on Foata normal form. 2768/53835 useless extension candidates. Maximal degree in co-relation 105714. Up to 25754 conditions per place. [2025-02-06 12:36:30,485 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 118 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2025-02-06 12:36:30,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 134 transitions, 761 flow [2025-02-06 12:36:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:36:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:36:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2025-02-06 12:36:30,487 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2025-02-06 12:36:30,488 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 353 flow. Second operand 3 states and 122 transitions. [2025-02-06 12:36:30,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 134 transitions, 761 flow [2025-02-06 12:36:31,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 761 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 12:36:31,112 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 369 flow [2025-02-06 12:36:31,113 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} [2025-02-06 12:36:31,113 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2025-02-06 12:36:31,113 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 369 flow [2025-02-06 12:36:31,114 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) [2025-02-06 12:36:31,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:36:31,114 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:36:31,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 12:36:31,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:36:31,314 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:36:31,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:36:31,315 INFO L85 PathProgramCache]: Analyzing trace with hash -541709478, now seen corresponding path program 2 times [2025-02-06 12:36:31,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:36:31,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783649117] [2025-02-06 12:36:31,316 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:36:31,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:36:31,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:36:31,318 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:36:31,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 12:36:31,391 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 1 equivalence classes. [2025-02-06 12:36:31,402 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 12:36:31,402 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 12:36:31,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:36:31,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 12:36:31,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:36:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:36:31,449 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:36:31,449 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:36:31,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783649117] [2025-02-06 12:36:31,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783649117] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:36:31,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:36:31,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:36:31,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480147499] [2025-02-06 12:36:31,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:36:31,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 12:36:31,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:36:31,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 12:36:31,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 12:36:31,451 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-02-06 12:36:31,451 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) [2025-02-06 12:36:31,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:36:31,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-02-06 12:36:31,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:36:34,610 INFO L124 PetriNetUnfolderBase]: 40434/62009 cut-off events. [2025-02-06 12:36:34,610 INFO L125 PetriNetUnfolderBase]: For 41673/41680 co-relation queries the response was YES. [2025-02-06 12:36:34,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156452 conditions, 62009 events. 40434/62009 cut-off events. For 41673/41680 co-relation queries the response was YES. Maximal size of possible extension queue 2418. Compared 484429 event pairs, 14421 based on Foata normal form. 663/62537 useless extension candidates. Maximal degree in co-relation 134060. Up to 32081 conditions per place. [2025-02-06 12:36:34,925 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 172 selfloop transitions, 11 changer transitions 0/195 dead transitions. [2025-02-06 12:36:34,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 195 transitions, 1152 flow [2025-02-06 12:36:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 12:36:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 12:36:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 173 transitions. [2025-02-06 12:36:34,927 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6975806451612904 [2025-02-06 12:36:34,927 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 369 flow. Second operand 4 states and 173 transitions. [2025-02-06 12:36:34,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 195 transitions, 1152 flow [2025-02-06 12:36:36,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 195 transitions, 1136 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:36:36,240 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 444 flow [2025-02-06 12:36:36,241 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} [2025-02-06 12:36:36,241 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2025-02-06 12:36:36,241 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 444 flow [2025-02-06 12:36:36,242 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) [2025-02-06 12:36:36,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:36:36,242 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:36:36,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 12:36:36,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:36:36,446 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:36:36,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:36:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash -894809891, now seen corresponding path program 1 times [2025-02-06 12:36:36,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:36:36,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779210514] [2025-02-06 12:36:36,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:36:36,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:36:36,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:36:36,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:36:36,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 12:36:36,512 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 12:36:36,526 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 12:36:36,526 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:36:36,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:36:36,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 12:36:36,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:36:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:36:36,575 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:36:36,575 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:36:36,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779210514] [2025-02-06 12:36:36,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779210514] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:36:36,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:36:36,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:36:36,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902157186] [2025-02-06 12:36:36,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:36:36,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:36:36,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:36:36,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:36:36,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:36:36,580 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-02-06 12:36:36,581 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) [2025-02-06 12:36:36,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:36:36,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-02-06 12:36:36,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:36:43,235 INFO L124 PetriNetUnfolderBase]: 84267/124012 cut-off events. [2025-02-06 12:36:43,235 INFO L125 PetriNetUnfolderBase]: For 100081/100125 co-relation queries the response was YES. [2025-02-06 12:36:43,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325329 conditions, 124012 events. 84267/124012 cut-off events. For 100081/100125 co-relation queries the response was YES. Maximal size of possible extension queue 4868. Compared 978360 event pairs, 12451 based on Foata normal form. 41/122019 useless extension candidates. Maximal degree in co-relation 281933. Up to 31079 conditions per place. [2025-02-06 12:36:44,163 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 385 selfloop transitions, 153 changer transitions 0/549 dead transitions. [2025-02-06 12:36:44,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 549 transitions, 3607 flow [2025-02-06 12:36:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 12:36:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 12:36:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 483 transitions. [2025-02-06 12:36:44,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5992555831265509 [2025-02-06 12:36:44,165 INFO L175 Difference]: Start difference. First operand has 82 places, 100 transitions, 444 flow. Second operand 13 states and 483 transitions. [2025-02-06 12:36:44,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 549 transitions, 3607 flow [2025-02-06 12:36:52,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 549 transitions, 3589 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-02-06 12:36:52,598 INFO L231 Difference]: Finished difference. Result has 102 places, 275 transitions, 2009 flow [2025-02-06 12:36:52,599 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} [2025-02-06 12:36:52,599 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 36 predicate places. [2025-02-06 12:36:52,599 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 275 transitions, 2009 flow [2025-02-06 12:36:52,602 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) [2025-02-06 12:36:52,602 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:36:52,602 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:36:52,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 12:36:52,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:36:52,803 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-02-06 12:36:52,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:36:52,803 INFO L85 PathProgramCache]: Analyzing trace with hash -648908035, now seen corresponding path program 1 times [2025-02-06 12:36:52,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-06 12:36:52,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666883999] [2025-02-06 12:36:52,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:36:52,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:36:52,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:36:52,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 12:36:52,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 12:36:52,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-06 12:36:52,874 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-06 12:36:52,875 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:36:52,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:36:52,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 12:36:52,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:36:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:36:52,914 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:36:52,914 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-06 12:36:52,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666883999] [2025-02-06 12:36:52,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666883999] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:36:52,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:36:52,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 12:36:52,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168279832] [2025-02-06 12:36:52,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:36:52,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 12:36:52,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-06 12:36:52,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 12:36:52,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 12:36:52,920 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2025-02-06 12:36:52,921 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) [2025-02-06 12:36:52,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:36:52,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2025-02-06 12:36:52,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand