./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-11.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/fib_unsafe-11.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 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 12:32:39,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:32:39,279 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:32:39,286 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:32:39,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:32:39,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:32:39,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:32:39,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:32:39,308 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:32:39,308 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:32:39,308 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:32:39,309 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:32:39,309 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:32:39,309 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:32:39,309 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:32:39,310 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:32:39,310 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:32:39,310 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:32:39,310 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:32:39,310 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:32:39,310 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:32:39,310 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:32:39,310 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:32:39,310 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:32:39,310 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:32:39,310 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:32:39,311 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:32:39,311 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:32:39,311 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:32:39,311 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:32:39,311 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:32:39,311 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:32:39,311 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:32:39,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:32:39,312 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:32:39,312 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:32:39,312 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:32:39,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:32:39,312 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:32:39,312 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:32:39,312 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:32:39,312 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:32:39,312 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 -> 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 [2025-02-06 12:32:39,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:32:39,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:32:39,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:32:39,542 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:32:39,542 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:32:39,544 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-11.i [2025-02-06 12:32:40,668 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c8543cf19/6af8ce8e00f349b5ac396ebfb6c84204/FLAGd57019974 [2025-02-06 12:32:40,950 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:32:40,951 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-11.i [2025-02-06 12:32:40,964 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c8543cf19/6af8ce8e00f349b5ac396ebfb6c84204/FLAGd57019974 [2025-02-06 12:32:40,983 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c8543cf19/6af8ce8e00f349b5ac396ebfb6c84204 [2025-02-06 12:32:40,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:32:40,987 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:32:40,989 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:32:40,989 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:32:40,992 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:32:40,993 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:32:40" (1/1) ... [2025-02-06 12:32:40,994 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:40, skipping insertion in model container [2025-02-06 12:32:40,994 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:32:40" (1/1) ... [2025-02-06 12:32:41,020 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:32:41,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:32:41,209 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:32:41,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:32:41,259 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:32:41,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41 WrapperNode [2025-02-06 12:32:41,260 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:32:41,261 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:32:41,261 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:32:41,261 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:32:41,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,275 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,287 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2025-02-06 12:32:41,288 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:32:41,289 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:32:41,289 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:32:41,290 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:32:41,294 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,297 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,304 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 12:32:41,304 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,307 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,308 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:32:41,319 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:32:41,319 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:32:41,319 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:32:41,319 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (1/1) ... [2025-02-06 12:32:41,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:32:41,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:41,344 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 12:32:41,348 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 12:32:41,365 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-02-06 12:32:41,365 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-02-06 12:32:41,365 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-02-06 12:32:41,365 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-02-06 12:32:41,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 12:32:41,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:32:41,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 12:32:41,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 12:32:41,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:32:41,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:32:41,366 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 12:32:41,463 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:32:41,464 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:32:41,604 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:32:41,604 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:32:41,680 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:32:41,681 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:32:41,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:32:41 BoogieIcfgContainer [2025-02-06 12:32:41,682 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:32:41,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:32:41,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:32:41,687 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:32:41,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:32:40" (1/3) ... [2025-02-06 12:32:41,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1a1246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:32:41, skipping insertion in model container [2025-02-06 12:32:41,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:32:41" (2/3) ... [2025-02-06 12:32:41,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1a1246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:32:41, skipping insertion in model container [2025-02-06 12:32:41,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:32:41" (3/3) ... [2025-02-06 12:32:41,689 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2025-02-06 12:32:41,699 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:32:41,700 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-11.i that has 3 procedures, 30 locations, 1 initial locations, 3 loop locations, and 2 error locations. [2025-02-06 12:32:41,701 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:32:41,735 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 12:32:41,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 76 flow [2025-02-06 12:32:41,789 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-02-06 12:32:41,792 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:32:41,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 5/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-02-06 12:32:41,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 76 flow [2025-02-06 12:32:41,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 32 transitions, 70 flow [2025-02-06 12:32:41,806 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:32:41,818 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;@52324655, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:32:41,818 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-06 12:32:41,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:32:41,830 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2025-02-06 12:32:41,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:32:41,830 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:41,831 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:41,831 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 12:32:41,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1473564154, now seen corresponding path program 1 times [2025-02-06 12:32:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:41,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538685970] [2025-02-06 12:32:41,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:41,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:41,907 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 12:32:41,925 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 12:32:41,926 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:41,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:42,021 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 12:32:42,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:42,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538685970] [2025-02-06 12:32:42,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538685970] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:32:42,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:32:42,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 12:32:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386302403] [2025-02-06 12:32:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:32:42,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:32:42,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:42,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:32:42,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:32:42,050 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-06 12:32:42,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 12:32:42,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:42,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-06 12:32:42,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:42,210 INFO L124 PetriNetUnfolderBase]: 297/523 cut-off events. [2025-02-06 12:32:42,210 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 12:32:42,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 523 events. 297/523 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2156 event pairs, 39 based on Foata normal form. 32/534 useless extension candidates. Maximal degree in co-relation 974. Up to 353 conditions per place. [2025-02-06 12:32:42,216 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 29 selfloop transitions, 2 changer transitions 1/38 dead transitions. [2025-02-06 12:32:42,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 146 flow [2025-02-06 12:32:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:32:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:32:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2025-02-06 12:32:42,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2025-02-06 12:32:42,228 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 59 transitions. [2025-02-06 12:32:42,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 146 flow [2025-02-06 12:32:42,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:32:42,236 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 72 flow [2025-02-06 12:32:42,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2025-02-06 12:32:42,239 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2025-02-06 12:32:42,239 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 72 flow [2025-02-06 12:32:42,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 12:32:42,240 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:42,240 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:42,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 12:32:42,240 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 12:32:42,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:42,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1404976497, now seen corresponding path program 1 times [2025-02-06 12:32:42,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:42,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580449040] [2025-02-06 12:32:42,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:42,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 12:32:42,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 12:32:42,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:42,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:42,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:42,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580449040] [2025-02-06 12:32:42,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580449040] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:42,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824006332] [2025-02-06 12:32:42,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:42,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:42,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:42,313 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 12:32:42,315 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 12:32:42,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 12:32:42,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 12:32:42,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:42,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:42,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-06 12:32:42,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 12:32:42,410 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 12:32:42,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824006332] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:32:42,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 12:32:42,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2025-02-06 12:32:42,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701668387] [2025-02-06 12:32:42,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:32:42,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:32:42,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:42,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:32:42,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 12:32:42,412 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-06 12:32:42,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 12:32:42,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:42,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-06 12:32:42,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:42,463 INFO L124 PetriNetUnfolderBase]: 265/459 cut-off events. [2025-02-06 12:32:42,463 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 12:32:42,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 459 events. 265/459 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1781 event pairs, 183 based on Foata normal form. 16/454 useless extension candidates. Maximal degree in co-relation 926. Up to 405 conditions per place. [2025-02-06 12:32:42,466 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 21 selfloop transitions, 1 changer transitions 1/28 dead transitions. [2025-02-06 12:32:42,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 116 flow [2025-02-06 12:32:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:32:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:32:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2025-02-06 12:32:42,467 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2025-02-06 12:32:42,467 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 72 flow. Second operand 3 states and 44 transitions. [2025-02-06 12:32:42,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 116 flow [2025-02-06 12:32:42,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:32:42,468 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 68 flow [2025-02-06 12:32:42,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2025-02-06 12:32:42,469 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2025-02-06 12:32:42,469 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 68 flow [2025-02-06 12:32:42,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 12:32:42,469 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:42,469 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:42,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 12:32:42,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:42,672 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 12:32:42,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:42,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1404975617, now seen corresponding path program 1 times [2025-02-06 12:32:42,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:42,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913372553] [2025-02-06 12:32:42,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:42,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:42,678 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 12:32:42,683 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 12:32:42,683 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:42,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:42,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:42,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913372553] [2025-02-06 12:32:42,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913372553] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:42,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502527732] [2025-02-06 12:32:42,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:32:42,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:42,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:42,734 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 12:32:42,736 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 12:32:42,775 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 12:32:42,789 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 12:32:42,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:32:42,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:42,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 12:32:42,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:42,817 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:42,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502527732] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:42,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:42,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-06 12:32:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218193204] [2025-02-06 12:32:42,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:42,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 12:32:42,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:42,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 12:32:42,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-06 12:32:42,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-06 12:32:42,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 68 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 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 12:32:42,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:42,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-06 12:32:42,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:42,984 INFO L124 PetriNetUnfolderBase]: 329/555 cut-off events. [2025-02-06 12:32:42,985 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 12:32:42,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 555 events. 329/555 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2078 event pairs, 39 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1160. Up to 257 conditions per place. [2025-02-06 12:32:42,989 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 52 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2025-02-06 12:32:42,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 258 flow [2025-02-06 12:32:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 12:32:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 12:32:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2025-02-06 12:32:42,992 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2025-02-06 12:32:42,992 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 68 flow. Second operand 6 states and 108 transitions. [2025-02-06 12:32:42,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 258 flow [2025-02-06 12:32:42,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 12:32:42,994 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 103 flow [2025-02-06 12:32:42,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2025-02-06 12:32:42,995 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2025-02-06 12:32:42,995 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 103 flow [2025-02-06 12:32:42,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 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 12:32:42,996 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:42,996 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:43,002 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 12:32:43,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:43,201 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 12:32:43,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:43,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2051551574, now seen corresponding path program 2 times [2025-02-06 12:32:43,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:43,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785990393] [2025-02-06 12:32:43,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:32:43,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:43,213 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 12:32:43,229 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 12:32:43,232 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:32:43,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785990393] [2025-02-06 12:32:43,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785990393] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984356011] [2025-02-06 12:32:43,338 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 12:32:43,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:43,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:43,340 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 12:32:43,342 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 12:32:43,382 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-06 12:32:43,395 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 12:32:43,396 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 12:32:43,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:43,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 12:32:43,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:43,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:43,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984356011] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:43,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:43,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-02-06 12:32:43,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64796228] [2025-02-06 12:32:43,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:43,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 12:32:43,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:43,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 12:32:43,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-06 12:32:43,464 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-06 12:32:43,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 103 flow. Second operand has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 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 12:32:43,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:43,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-06 12:32:43,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:43,632 INFO L124 PetriNetUnfolderBase]: 521/843 cut-off events. [2025-02-06 12:32:43,632 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-02-06 12:32:43,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 843 events. 521/843 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3138 event pairs, 39 based on Foata normal form. 96/934 useless extension candidates. Maximal degree in co-relation 2104. Up to 257 conditions per place. [2025-02-06 12:32:43,636 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 100 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2025-02-06 12:32:43,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 116 transitions, 521 flow [2025-02-06 12:32:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 12:32:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 12:32:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2025-02-06 12:32:43,640 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5220588235294118 [2025-02-06 12:32:43,640 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 103 flow. Second operand 12 states and 213 transitions. [2025-02-06 12:32:43,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 116 transitions, 521 flow [2025-02-06 12:32:43,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 116 transitions, 507 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-06 12:32:43,646 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 173 flow [2025-02-06 12:32:43,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2025-02-06 12:32:43,647 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2025-02-06 12:32:43,647 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 173 flow [2025-02-06 12:32:43,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 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 12:32:43,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:43,648 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:43,654 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 12:32:43,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:43,849 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 12:32:43,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:43,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1525932406, now seen corresponding path program 3 times [2025-02-06 12:32:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:43,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552211605] [2025-02-06 12:32:43,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:32:43,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:43,855 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 6 equivalence classes. [2025-02-06 12:32:43,888 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 12:32:43,888 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-06 12:32:43,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:44,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:44,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552211605] [2025-02-06 12:32:44,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552211605] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:44,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870407199] [2025-02-06 12:32:44,060 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 12:32:44,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:44,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:44,063 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 12:32:44,063 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 12:32:44,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 6 equivalence classes. [2025-02-06 12:32:44,122 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 12:32:44,122 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-06 12:32:44,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:44,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 12:32:44,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:44,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:44,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870407199] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:44,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:44,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-02-06 12:32:44,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515043392] [2025-02-06 12:32:44,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:44,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 12:32:44,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:44,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 12:32:44,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-06 12:32:44,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-06 12:32:44,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 173 flow. Second operand has 25 states, 25 states have (on average 9.44) internal successors, (236), 25 states have internal predecessors, (236), 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 12:32:44,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:44,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-06 12:32:44,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:44,677 INFO L124 PetriNetUnfolderBase]: 905/1419 cut-off events. [2025-02-06 12:32:44,677 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-02-06 12:32:44,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 1419 events. 905/1419 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5205 event pairs, 39 based on Foata normal form. 192/1606 useless extension candidates. Maximal degree in co-relation 4104. Up to 337 conditions per place. [2025-02-06 12:32:44,687 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 196 selfloop transitions, 23 changer transitions 0/224 dead transitions. [2025-02-06 12:32:44,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 224 transitions, 1059 flow [2025-02-06 12:32:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 12:32:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-02-06 12:32:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 423 transitions. [2025-02-06 12:32:44,689 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5183823529411765 [2025-02-06 12:32:44,689 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 173 flow. Second operand 24 states and 423 transitions. [2025-02-06 12:32:44,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 224 transitions, 1059 flow [2025-02-06 12:32:44,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 224 transitions, 987 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-02-06 12:32:44,702 INFO L231 Difference]: Finished difference. Result has 85 places, 48 transitions, 293 flow [2025-02-06 12:32:44,702 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=293, PETRI_PLACES=85, PETRI_TRANSITIONS=48} [2025-02-06 12:32:44,702 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 51 predicate places. [2025-02-06 12:32:44,702 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 48 transitions, 293 flow [2025-02-06 12:32:44,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.44) internal successors, (236), 25 states have internal predecessors, (236), 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 12:32:44,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:44,703 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:44,709 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 12:32:44,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:44,907 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 12:32:44,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:44,908 INFO L85 PathProgramCache]: Analyzing trace with hash 773359178, now seen corresponding path program 4 times [2025-02-06 12:32:44,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:44,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229311333] [2025-02-06 12:32:44,908 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 12:32:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:44,916 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-02-06 12:32:44,930 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-06 12:32:44,930 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 12:32:44,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:45,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:45,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229311333] [2025-02-06 12:32:45,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229311333] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:45,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930442481] [2025-02-06 12:32:45,318 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 12:32:45,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:45,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:45,320 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 12:32:45,321 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 12:32:45,354 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-02-06 12:32:45,378 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-06 12:32:45,378 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 12:32:45,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:45,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-06 12:32:45,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:45,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:45,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930442481] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:45,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:45,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 26 [2025-02-06 12:32:45,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729563689] [2025-02-06 12:32:45,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:45,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 12:32:45,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:45,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 12:32:45,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2025-02-06 12:32:45,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-06 12:32:45,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 48 transitions, 293 flow. Second operand has 26 states, 26 states have (on average 9.423076923076923) internal successors, (245), 26 states have internal predecessors, (245), 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 12:32:45,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:45,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-06 12:32:45,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:32:46,052 INFO L124 PetriNetUnfolderBase]: 969/1515 cut-off events. [2025-02-06 12:32:46,053 INFO L125 PetriNetUnfolderBase]: For 9868/9868 co-relation queries the response was YES. [2025-02-06 12:32:46,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4615 conditions, 1515 events. 969/1515 cut-off events. For 9868/9868 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5526 event pairs, 39 based on Foata normal form. 32/1542 useless extension candidates. Maximal degree in co-relation 4584. Up to 273 conditions per place. [2025-02-06 12:32:46,062 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 212 selfloop transitions, 25 changer transitions 0/242 dead transitions. [2025-02-06 12:32:46,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 242 transitions, 1167 flow [2025-02-06 12:32:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-06 12:32:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-06 12:32:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 447 transitions. [2025-02-06 12:32:46,065 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.505656108597285 [2025-02-06 12:32:46,065 INFO L175 Difference]: Start difference. First operand has 85 places, 48 transitions, 293 flow. Second operand 26 states and 447 transitions. [2025-02-06 12:32:46,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 242 transitions, 1167 flow [2025-02-06 12:32:46,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 242 transitions, 1067 flow, removed 39 selfloop flow, removed 11 redundant places. [2025-02-06 12:32:46,083 INFO L231 Difference]: Finished difference. Result has 101 places, 50 transitions, 269 flow [2025-02-06 12:32:46,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=269, PETRI_PLACES=101, PETRI_TRANSITIONS=50} [2025-02-06 12:32:46,084 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 67 predicate places. [2025-02-06 12:32:46,085 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 50 transitions, 269 flow [2025-02-06 12:32:46,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.423076923076923) internal successors, (245), 26 states have internal predecessors, (245), 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 12:32:46,085 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:32:46,086 INFO L206 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 12:32:46,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 12:32:46,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:46,286 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-06 12:32:46,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:32:46,287 INFO L85 PathProgramCache]: Analyzing trace with hash 966615274, now seen corresponding path program 5 times [2025-02-06 12:32:46,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:32:46,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063363585] [2025-02-06 12:32:46,287 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 12:32:46,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:32:46,296 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 13 equivalence classes. [2025-02-06 12:32:46,381 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 38 of 38 statements. [2025-02-06 12:32:46,381 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-06 12:32:46,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:47,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:32:47,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063363585] [2025-02-06 12:32:47,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063363585] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 12:32:47,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964530890] [2025-02-06 12:32:47,740 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 12:32:47,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 12:32:47,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:32:47,741 INFO L229 MonitoredProcess]: Starting monitored process 7 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 12:32:47,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 12:32:47,777 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 13 equivalence classes. [2025-02-06 12:32:47,805 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 38 of 38 statements. [2025-02-06 12:32:47,805 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-06 12:32:47,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:32:47,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-02-06 12:32:47,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 12:32:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:49,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 12:32:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:32:50,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964530890] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 12:32:50,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 12:32:50,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 89 [2025-02-06 12:32:50,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249474764] [2025-02-06 12:32:50,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 12:32:50,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2025-02-06 12:32:50,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:32:50,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2025-02-06 12:32:50,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1161, Invalid=6849, Unknown=0, NotChecked=0, Total=8010 [2025-02-06 12:32:50,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-06 12:32:50,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 50 transitions, 269 flow. Second operand has 90 states, 90 states have (on average 8.188888888888888) internal successors, (737), 90 states have internal predecessors, (737), 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 12:32:50,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:32:50,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-06 12:32:50,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand