./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d 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-ext/28_buggy_simple_loop1_vf.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 f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:13:00,217 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:13:00,260 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:13:00,263 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:13:00,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:13:00,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:13:00,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:13:00,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:13:00,281 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:13:00,281 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:13:00,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:13:00,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:13:00,281 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:13:00,281 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:13:00,281 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:13:00,281 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:13:00,281 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:13:00,282 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:13:00,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:13:00,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:13:00,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:13:00,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:13:00,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:13:00,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:13:00,283 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:13:00,283 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:13:00,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:13:00,283 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 -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2025-02-08 08:13:00,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:13:00,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:13:00,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:13:00,480 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:13:00,480 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:13:00,481 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2025-02-08 08:13:01,657 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3898e84ea/ae6bcd49a583463485b2c8a6e7802190/FLAGbdd811c83 [2025-02-08 08:13:01,949 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:13:01,950 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2025-02-08 08:13:01,959 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3898e84ea/ae6bcd49a583463485b2c8a6e7802190/FLAGbdd811c83 [2025-02-08 08:13:02,230 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3898e84ea/ae6bcd49a583463485b2c8a6e7802190 [2025-02-08 08:13:02,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:13:02,233 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:13:02,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:13:02,234 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:13:02,238 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:13:02,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16fc3430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02, skipping insertion in model container [2025-02-08 08:13:02,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,269 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:13:02,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:13:02,486 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:13:02,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:13:02,559 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:13:02,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02 WrapperNode [2025-02-08 08:13:02,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:13:02,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:13:02,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:13:02,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:13:02,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,576 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,592 INFO L138 Inliner]: procedures = 166, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2025-02-08 08:13:02,593 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:13:02,593 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:13:02,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:13:02,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:13:02,598 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,600 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,610 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]. [2025-02-08 08:13:02,610 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,610 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,612 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,613 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,613 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,614 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:13:02,615 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:13:02,615 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:13:02,615 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:13:02,616 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (1/1) ... [2025-02-08 08:13:02,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:13:02,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:13:02,642 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) [2025-02-08 08:13:02,644 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 [2025-02-08 08:13:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-02-08 08:13:02,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-02-08 08:13:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:13:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:13:02,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:13:02,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:13:02,660 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:13:02,722 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:13:02,724 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:13:02,837 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:13:02,838 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:13:02,903 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:13:02,903 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:13:02,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:13:02 BoogieIcfgContainer [2025-02-08 08:13:02,903 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:13:02,905 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:13:02,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:13:02,908 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:13:02,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:13:02" (1/3) ... [2025-02-08 08:13:02,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13218963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:13:02, skipping insertion in model container [2025-02-08 08:13:02,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:02" (2/3) ... [2025-02-08 08:13:02,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13218963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:13:02, skipping insertion in model container [2025-02-08 08:13:02,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:13:02" (3/3) ... [2025-02-08 08:13:02,910 INFO L128 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2025-02-08 08:13:02,920 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:13:02,921 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28_buggy_simple_loop1_vf.i that has 2 procedures, 20 locations, 1 initial locations, 4 loop locations, and 2 error locations. [2025-02-08 08:13:02,921 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:13:02,979 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:13:02,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 25 transitions, 54 flow [2025-02-08 08:13:03,014 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2025-02-08 08:13:03,016 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:03,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 29 events. 5/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 58 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2025-02-08 08:13:03,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 25 transitions, 54 flow [2025-02-08 08:13:03,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 25 transitions, 54 flow [2025-02-08 08:13:03,025 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:13:03,039 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;@4e9be42e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:13:03,039 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-08 08:13:03,041 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:13:03,041 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-02-08 08:13:03,041 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:03,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:03,042 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:13:03,042 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:13:03,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash 144092, now seen corresponding path program 1 times [2025-02-08 08:13:03,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:03,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003564116] [2025-02-08 08:13:03,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:03,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:03,102 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:13:03,104 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:13:03,104 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:03,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:03,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:13:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003564116] [2025-02-08 08:13:03,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003564116] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:03,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:03,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:13:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855035345] [2025-02-08 08:13:03,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:03,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 08:13:03,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:13:03,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 08:13:03,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 08:13:03,164 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 25 [2025-02-08 08:13:03,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 25 transitions, 54 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2025-02-08 08:13:03,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:03,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 25 [2025-02-08 08:13:03,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:13:03,211 INFO L124 PetriNetUnfolderBase]: 19/58 cut-off events. [2025-02-08 08:13:03,212 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:03,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 58 events. 19/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 166 event pairs, 10 based on Foata normal form. 6/61 useless extension candidates. Maximal degree in co-relation 90. Up to 40 conditions per place. [2025-02-08 08:13:03,213 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 12 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2025-02-08 08:13:03,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 66 flow [2025-02-08 08:13:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 08:13:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 08:13:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 31 transitions. [2025-02-08 08:13:03,222 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-02-08 08:13:03,223 INFO L175 Difference]: Start difference. First operand has 23 places, 25 transitions, 54 flow. Second operand 2 states and 31 transitions. [2025-02-08 08:13:03,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 66 flow [2025-02-08 08:13:03,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 66 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:13:03,227 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 42 flow [2025-02-08 08:13:03,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2025-02-08 08:13:03,232 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2025-02-08 08:13:03,234 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 42 flow [2025-02-08 08:13:03,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2025-02-08 08:13:03,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:03,236 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 08:13:03,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:13:03,236 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:13:03,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:03,238 INFO L85 PathProgramCache]: Analyzing trace with hash -521613, now seen corresponding path program 1 times [2025-02-08 08:13:03,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:03,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305072226] [2025-02-08 08:13:03,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:03,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:03,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:13:03,264 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:13:03,265 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:03,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:03,265 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:13:03,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:13:03,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:13:03,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:03,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:03,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 08:13:03,285 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:13:03,286 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-02-08 08:13:03,288 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 4 remaining) [2025-02-08 08:13:03,289 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 4 remaining) [2025-02-08 08:13:03,289 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 4 remaining) [2025-02-08 08:13:03,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:13:03,289 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-02-08 08:13:03,291 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-08 08:13:03,291 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-02-08 08:13:03,331 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:13:03,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 43 transitions, 96 flow [2025-02-08 08:13:03,344 INFO L124 PetriNetUnfolderBase]: 10/52 cut-off events. [2025-02-08 08:13:03,345 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:13:03,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 52 events. 10/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 141 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 39. Up to 3 conditions per place. [2025-02-08 08:13:03,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 43 transitions, 96 flow [2025-02-08 08:13:03,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 43 transitions, 96 flow [2025-02-08 08:13:03,349 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:13:03,350 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;@4e9be42e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:13:03,350 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-02-08 08:13:03,351 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:13:03,351 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-02-08 08:13:03,351 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:03,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:03,351 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:13:03,352 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 08:13:03,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash 186791, now seen corresponding path program 1 times [2025-02-08 08:13:03,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:03,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168412375] [2025-02-08 08:13:03,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:03,362 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:13:03,363 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:13:03,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:03,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:03,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:13:03,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168412375] [2025-02-08 08:13:03,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168412375] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:03,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:03,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:13:03,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808385503] [2025-02-08 08:13:03,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:03,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 08:13:03,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:13:03,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 08:13:03,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 08:13:03,376 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-02-08 08:13:03,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 43 transitions, 96 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2025-02-08 08:13:03,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:03,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-02-08 08:13:03,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:13:03,513 INFO L124 PetriNetUnfolderBase]: 277/534 cut-off events. [2025-02-08 08:13:03,516 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-02-08 08:13:03,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 534 events. 277/534 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2673 event pairs, 160 based on Foata normal form. 77/566 useless extension candidates. Maximal degree in co-relation 330. Up to 406 conditions per place. [2025-02-08 08:13:03,523 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 21 selfloop transitions, 0 changer transitions 0/34 dead transitions. [2025-02-08 08:13:03,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 34 transitions, 120 flow [2025-02-08 08:13:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 08:13:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 08:13:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2025-02-08 08:13:03,526 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2025-02-08 08:13:03,526 INFO L175 Difference]: Start difference. First operand has 38 places, 43 transitions, 96 flow. Second operand 2 states and 54 transitions. [2025-02-08 08:13:03,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 34 transitions, 120 flow [2025-02-08 08:13:03,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:13:03,527 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 78 flow [2025-02-08 08:13:03,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2025-02-08 08:13:03,528 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2025-02-08 08:13:03,528 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 78 flow [2025-02-08 08:13:03,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2025-02-08 08:13:03,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:03,528 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:13:03,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:13:03,528 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 08:13:03,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1585454949, now seen corresponding path program 1 times [2025-02-08 08:13:03,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:03,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369250107] [2025-02-08 08:13:03,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:03,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:03,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:13:03,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:13:03,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:03,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:03,556 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:13:03,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:13:03,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:13:03,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:03,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:03,591 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 08:13:03,591 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:13:03,591 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 5 remaining) [2025-02-08 08:13:03,591 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 5 remaining) [2025-02-08 08:13:03,591 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 5 remaining) [2025-02-08 08:13:03,591 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2025-02-08 08:13:03,591 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2025-02-08 08:13:03,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:13:03,593 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-02-08 08:13:03,611 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2025-02-08 08:13:03,611 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 08:13:03,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 08:13:03 BasicIcfg [2025-02-08 08:13:03,617 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 08:13:03,618 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 08:13:03,619 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 08:13:03,619 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 08:13:03,620 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:13:02" (3/4) ... [2025-02-08 08:13:03,621 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-02-08 08:13:03,621 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 08:13:03,622 INFO L158 Benchmark]: Toolchain (without parser) took 1388.94ms. Allocated memory is still 167.8MB. Free memory was 120.9MB in the beginning and 103.0MB in the end (delta: 17.9MB). Peak memory consumption was 16.1MB. Max. memory is 16.1GB. [2025-02-08 08:13:03,622 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 119.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:13:03,622 INFO L158 Benchmark]: CACSL2BoogieTranslator took 326.47ms. Allocated memory is still 167.8MB. Free memory was 120.9MB in the beginning and 101.8MB in the end (delta: 19.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:13:03,622 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.09ms. Allocated memory is still 167.8MB. Free memory was 101.8MB in the beginning and 100.0MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:13:03,623 INFO L158 Benchmark]: Boogie Preprocessor took 21.50ms. Allocated memory is still 167.8MB. Free memory was 100.0MB in the beginning and 98.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:13:03,623 INFO L158 Benchmark]: IcfgBuilder took 288.05ms. Allocated memory is still 167.8MB. Free memory was 98.8MB in the beginning and 81.2MB in the end (delta: 17.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-08 08:13:03,623 INFO L158 Benchmark]: TraceAbstraction took 712.70ms. Allocated memory is still 167.8MB. Free memory was 80.8MB in the beginning and 103.1MB in the end (delta: -22.3MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:13:03,623 INFO L158 Benchmark]: Witness Printer took 3.58ms. Allocated memory is still 167.8MB. Free memory was 103.1MB in the beginning and 103.0MB in the end (delta: 50.8kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:13:03,625 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 119.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 326.47ms. Allocated memory is still 167.8MB. Free memory was 120.9MB in the beginning and 101.8MB in the end (delta: 19.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.09ms. Allocated memory is still 167.8MB. Free memory was 101.8MB in the beginning and 100.0MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.50ms. Allocated memory is still 167.8MB. Free memory was 100.0MB in the beginning and 98.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 288.05ms. Allocated memory is still 167.8MB. Free memory was 98.8MB in the beginning and 81.2MB in the end (delta: 17.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 712.70ms. Allocated memory is still 167.8MB. Free memory was 80.8MB in the beginning and 103.1MB in the end (delta: -22.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.58ms. Allocated memory is still 167.8MB. Free memory was 103.1MB in the beginning and 103.0MB in the end (delta: 50.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 12. Possible FailurePath: [L700] 0 pthread_t t; [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [t=-1] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [\old(arg)={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i 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 -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2025-02-08 08:13:05,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:13:06,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:13:06,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:13:06,003 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:13:06,003 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:13:06,004 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2025-02-08 08:13:07,151 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b7b3f7648/87da428576274ce9a19e2d9b79c75417/FLAG4ab068e05 [2025-02-08 08:13:07,416 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:13:07,417 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2025-02-08 08:13:07,430 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b7b3f7648/87da428576274ce9a19e2d9b79c75417/FLAG4ab068e05 [2025-02-08 08:13:07,734 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b7b3f7648/87da428576274ce9a19e2d9b79c75417 [2025-02-08 08:13:07,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:13:07,737 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:13:07,738 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:13:07,738 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:13:07,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:13:07,741 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:13:07" (1/1) ... [2025-02-08 08:13:07,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609aec4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:07, skipping insertion in model container [2025-02-08 08:13:07,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:13:07" (1/1) ... [2025-02-08 08:13:07,770 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:13:07,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:13:07,966 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:13:08,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:13:08,050 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:13:08,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08 WrapperNode [2025-02-08 08:13:08,051 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:13:08,052 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:13:08,052 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:13:08,052 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:13:08,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,086 INFO L138 Inliner]: procedures = 167, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2025-02-08 08:13:08,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:13:08,087 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:13:08,087 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:13:08,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:13:08,091 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,093 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,104 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]. [2025-02-08 08:13:08,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,113 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,113 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,118 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,120 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:13:08,120 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:13:08,121 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:13:08,121 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:13:08,121 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (1/1) ... [2025-02-08 08:13:08,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:13:08,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:13:08,157 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) [2025-02-08 08:13:08,164 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 [2025-02-08 08:13:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-02-08 08:13:08,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-02-08 08:13:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:13:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-02-08 08:13:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:13:08,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:13:08,183 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:13:08,290 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:13:08,291 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:13:08,438 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:13:08,438 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:13:08,517 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:13:08,518 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:13:08,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:13:08 BoogieIcfgContainer [2025-02-08 08:13:08,518 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:13:08,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:13:08,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:13:08,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:13:08,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:13:07" (1/3) ... [2025-02-08 08:13:08,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5322a330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:13:08, skipping insertion in model container [2025-02-08 08:13:08,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:08" (2/3) ... [2025-02-08 08:13:08,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5322a330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:13:08, skipping insertion in model container [2025-02-08 08:13:08,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:13:08" (3/3) ... [2025-02-08 08:13:08,526 INFO L128 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2025-02-08 08:13:08,536 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:13:08,542 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28_buggy_simple_loop1_vf.i that has 2 procedures, 20 locations, 1 initial locations, 4 loop locations, and 2 error locations. [2025-02-08 08:13:08,542 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:13:08,595 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:13:08,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 25 transitions, 54 flow [2025-02-08 08:13:08,655 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2025-02-08 08:13:08,658 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:08,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 29 events. 5/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 58 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2025-02-08 08:13:08,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 25 transitions, 54 flow [2025-02-08 08:13:08,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 25 transitions, 54 flow [2025-02-08 08:13:08,669 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:13:08,681 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;@448547e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:13:08,682 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-08 08:13:08,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:13:08,687 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-02-08 08:13:08,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:08,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:08,687 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:13:08,687 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:13:08,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 146078, now seen corresponding path program 1 times [2025-02-08 08:13:08,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:13:08,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818294963] [2025-02-08 08:13:08,742 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:08,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:13:08,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:13:08,748 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) [2025-02-08 08:13:08,749 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 [2025-02-08 08:13:08,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:13:08,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:13:08,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:08,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:08,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-08 08:13:08,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:13:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:08,829 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:13:08,829 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:13:08,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818294963] [2025-02-08 08:13:08,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818294963] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:08,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:08,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:13:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619493568] [2025-02-08 08:13:08,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:08,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 08:13:08,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:13:08,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 08:13:08,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 08:13:08,856 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 25 [2025-02-08 08:13:08,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 25 transitions, 54 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2025-02-08 08:13:08,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:08,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 25 [2025-02-08 08:13:08,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:13:08,901 INFO L124 PetriNetUnfolderBase]: 19/58 cut-off events. [2025-02-08 08:13:08,901 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:08,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 58 events. 19/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 166 event pairs, 10 based on Foata normal form. 6/61 useless extension candidates. Maximal degree in co-relation 90. Up to 40 conditions per place. [2025-02-08 08:13:08,905 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 12 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2025-02-08 08:13:08,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 66 flow [2025-02-08 08:13:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 08:13:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 08:13:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 31 transitions. [2025-02-08 08:13:08,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-02-08 08:13:08,923 INFO L175 Difference]: Start difference. First operand has 23 places, 25 transitions, 54 flow. Second operand 2 states and 31 transitions. [2025-02-08 08:13:08,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 66 flow [2025-02-08 08:13:08,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 66 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:13:08,931 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 42 flow [2025-02-08 08:13:08,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2025-02-08 08:13:08,939 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2025-02-08 08:13:08,939 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 42 flow [2025-02-08 08:13:08,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2025-02-08 08:13:08,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:08,939 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 08:13:08,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 08:13:09,140 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 [2025-02-08 08:13:09,141 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-02-08 08:13:09,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash 58645299, now seen corresponding path program 1 times [2025-02-08 08:13:09,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:13:09,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940366048] [2025-02-08 08:13:09,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:09,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:13:09,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:13:09,146 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) [2025-02-08 08:13:09,147 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 [2025-02-08 08:13:09,190 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:13:09,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:13:09,198 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:09,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:09,198 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:13:09,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:13:09,206 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:13:09,206 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:09,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:09,220 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-02-08 08:13:09,220 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:13:09,221 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-02-08 08:13:09,223 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 4 remaining) [2025-02-08 08:13:09,223 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 4 remaining) [2025-02-08 08:13:09,223 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 4 remaining) [2025-02-08 08:13:09,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 08:13:09,423 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 [2025-02-08 08:13:09,424 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-02-08 08:13:09,426 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-08 08:13:09,426 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-02-08 08:13:09,456 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:13:09,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 43 transitions, 96 flow [2025-02-08 08:13:09,465 INFO L124 PetriNetUnfolderBase]: 10/52 cut-off events. [2025-02-08 08:13:09,465 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:13:09,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 52 events. 10/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 141 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 39. Up to 3 conditions per place. [2025-02-08 08:13:09,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 43 transitions, 96 flow [2025-02-08 08:13:09,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 43 transitions, 96 flow [2025-02-08 08:13:09,467 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:13:09,468 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;@448547e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:13:09,468 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-02-08 08:13:09,469 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:13:09,469 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-02-08 08:13:09,469 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:09,469 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:09,469 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:13:09,469 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 08:13:09,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash 188777, now seen corresponding path program 1 times [2025-02-08 08:13:09,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:13:09,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354340498] [2025-02-08 08:13:09,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:09,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:13:09,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:13:09,471 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) [2025-02-08 08:13:09,474 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 [2025-02-08 08:13:09,523 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:13:09,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:13:09,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:09,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:09,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-08 08:13:09,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:13:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:09,529 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:13:09,529 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-02-08 08:13:09,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354340498] [2025-02-08 08:13:09,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354340498] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:09,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:09,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:13:09,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379843335] [2025-02-08 08:13:09,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:09,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 08:13:09,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-02-08 08:13:09,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 08:13:09,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 08:13:09,530 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-02-08 08:13:09,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 43 transitions, 96 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2025-02-08 08:13:09,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:09,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-02-08 08:13:09,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:13:09,667 INFO L124 PetriNetUnfolderBase]: 277/534 cut-off events. [2025-02-08 08:13:09,667 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-02-08 08:13:09,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 534 events. 277/534 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2673 event pairs, 160 based on Foata normal form. 77/566 useless extension candidates. Maximal degree in co-relation 330. Up to 406 conditions per place. [2025-02-08 08:13:09,672 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 21 selfloop transitions, 0 changer transitions 0/34 dead transitions. [2025-02-08 08:13:09,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 34 transitions, 120 flow [2025-02-08 08:13:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 08:13:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 08:13:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2025-02-08 08:13:09,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2025-02-08 08:13:09,675 INFO L175 Difference]: Start difference. First operand has 38 places, 43 transitions, 96 flow. Second operand 2 states and 54 transitions. [2025-02-08 08:13:09,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 34 transitions, 120 flow [2025-02-08 08:13:09,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:13:09,677 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 78 flow [2025-02-08 08:13:09,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2025-02-08 08:13:09,679 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2025-02-08 08:13:09,679 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 78 flow [2025-02-08 08:13:09,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2025-02-08 08:13:09,679 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:09,679 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:13:09,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 08:13:09,884 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 [2025-02-08 08:13:09,884 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 08:13:09,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:09,885 INFO L85 PathProgramCache]: Analyzing trace with hash -560627301, now seen corresponding path program 1 times [2025-02-08 08:13:09,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-02-08 08:13:09,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766390543] [2025-02-08 08:13:09,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:09,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:13:09,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:13:09,892 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) [2025-02-08 08:13:09,893 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 [2025-02-08 08:13:09,952 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:13:09,959 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:13:09,959 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:09,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:09,959 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:13:09,968 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:13:09,973 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:13:09,973 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:09,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:09,984 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-02-08 08:13:09,985 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:13:09,985 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 5 remaining) [2025-02-08 08:13:09,985 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 5 remaining) [2025-02-08 08:13:09,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 5 remaining) [2025-02-08 08:13:09,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2025-02-08 08:13:09,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2025-02-08 08:13:09,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 08:13:10,186 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 [2025-02-08 08:13:10,187 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-02-08 08:13:10,207 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2025-02-08 08:13:10,207 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 08:13:10,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 08:13:10 BasicIcfg [2025-02-08 08:13:10,215 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 08:13:10,216 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 08:13:10,216 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 08:13:10,216 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 08:13:10,217 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:13:08" (3/4) ... [2025-02-08 08:13:10,218 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-02-08 08:13:10,218 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 08:13:10,219 INFO L158 Benchmark]: Toolchain (without parser) took 2481.99ms. Allocated memory is still 117.4MB. Free memory was 91.3MB in the beginning and 41.4MB in the end (delta: 50.0MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. [2025-02-08 08:13:10,219 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory is still 62.7MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:13:10,220 INFO L158 Benchmark]: CACSL2BoogieTranslator took 313.59ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 71.5MB in the end (delta: 19.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-08 08:13:10,220 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.25ms. Allocated memory is still 117.4MB. Free memory was 71.2MB in the beginning and 69.6MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:13:10,220 INFO L158 Benchmark]: Boogie Preprocessor took 33.12ms. Allocated memory is still 117.4MB. Free memory was 69.6MB in the beginning and 68.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:13:10,220 INFO L158 Benchmark]: IcfgBuilder took 397.93ms. Allocated memory is still 117.4MB. Free memory was 68.2MB in the beginning and 48.6MB in the end (delta: 19.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-08 08:13:10,220 INFO L158 Benchmark]: TraceAbstraction took 1694.88ms. Allocated memory is still 117.4MB. Free memory was 48.2MB in the beginning and 41.4MB in the end (delta: 6.8MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2025-02-08 08:13:10,221 INFO L158 Benchmark]: Witness Printer took 2.82ms. Allocated memory is still 117.4MB. Free memory was 41.4MB in the beginning and 41.4MB in the end (delta: 23.2kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:13:10,222 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory is still 62.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 313.59ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 71.5MB in the end (delta: 19.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.25ms. Allocated memory is still 117.4MB. Free memory was 71.2MB in the beginning and 69.6MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.12ms. Allocated memory is still 117.4MB. Free memory was 69.6MB in the beginning and 68.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 397.93ms. Allocated memory is still 117.4MB. Free memory was 68.2MB in the beginning and 48.6MB in the end (delta: 19.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1694.88ms. Allocated memory is still 117.4MB. Free memory was 48.2MB in the beginning and 41.4MB in the end (delta: 6.8MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * Witness Printer took 2.82ms. Allocated memory is still 117.4MB. Free memory was 41.4MB in the beginning and 41.4MB in the end (delta: 23.2kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 12. Possible FailurePath: [L700] 0 pthread_t t; [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [t=0] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [\old(arg)={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i