./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:24:41,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:24:41,979 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:24:41,983 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:24:41,983 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:24:42,000 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:24:42,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:24:42,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:24:42,001 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:24:42,001 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:24:42,001 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:24:42,002 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:24:42,002 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:24:42,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:24:42,002 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:24:42,002 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:24:42,003 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:24:42,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:24:42,004 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:24:42,004 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:24:42,004 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:24:42,004 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:24:42,004 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:24:42,004 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:24:42,004 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:24:42,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:24:42,004 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 [2025-03-17 14:24:42,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:24:42,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:24:42,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:24:42,248 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:24:42,248 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:24:42,249 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-comm.wvr.c [2025-03-17 14:24:43,349 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5c4d2aa/84725fdc42ce48028f5a740740fea479/FLAG0e83f6f92 [2025-03-17 14:24:43,566 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:24:43,566 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2025-03-17 14:24:43,571 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5c4d2aa/84725fdc42ce48028f5a740740fea479/FLAG0e83f6f92 [2025-03-17 14:24:43,581 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5c4d2aa/84725fdc42ce48028f5a740740fea479 [2025-03-17 14:24:43,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:24:43,584 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:24:43,585 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:24:43,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:24:43,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:24:43,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30eec23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43, skipping insertion in model container [2025-03-17 14:24:43,589 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,600 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:24:43,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:24:43,706 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:24:43,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:24:43,732 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:24:43,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43 WrapperNode [2025-03-17 14:24:43,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:24:43,734 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:24:43,734 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:24:43,734 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:24:43,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,743 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,754 INFO L138 Inliner]: procedures = 20, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 43 [2025-03-17 14:24:43,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:24:43,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:24:43,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:24:43,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:24:43,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,766 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,775 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-17 14:24:43,775 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,775 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,778 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,779 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:24:43,781 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:24:43,781 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:24:43,782 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:24:43,782 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (1/1) ... [2025-03-17 14:24:43,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:24:43,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:43,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 14:24:43,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 14:24:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:24:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:24:43,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:24:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:24:43,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:24:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:24:43,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:24:43,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:24:43,827 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:24:43,895 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:24:43,897 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:24:44,054 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:24:44,054 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:24:44,167 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:24:44,169 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:24:44,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:24:44 BoogieIcfgContainer [2025-03-17 14:24:44,169 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:24:44,171 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:24:44,171 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:24:44,174 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:24:44,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:24:43" (1/3) ... [2025-03-17 14:24:44,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307f10b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:24:44, skipping insertion in model container [2025-03-17 14:24:44,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:24:43" (2/3) ... [2025-03-17 14:24:44,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307f10b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:24:44, skipping insertion in model container [2025-03-17 14:24:44,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:24:44" (3/3) ... [2025-03-17 14:24:44,178 INFO L128 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2025-03-17 14:24:44,188 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:24:44,190 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mult-comm.wvr.c that has 3 procedures, 19 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-03-17 14:24:44,190 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:24:44,229 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 14:24:44,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 20 transitions, 54 flow [2025-03-17 14:24:44,286 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2025-03-17 14:24:44,287 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:24:44,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 2/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-03-17 14:24:44,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 20 transitions, 54 flow [2025-03-17 14:24:44,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 17 transitions, 46 flow [2025-03-17 14:24:44,301 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:24:44,312 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;@5da0c92c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:24:44,312 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 14:24:44,322 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:24:44,323 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2025-03-17 14:24:44,323 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:24:44,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:44,324 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:44,324 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:24:44,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash -155929334, now seen corresponding path program 1 times [2025-03-17 14:24:44,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:44,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188391388] [2025-03-17 14:24:44,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:44,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:44,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:24:44,423 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:24:44,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:44,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:44,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:44,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188391388] [2025-03-17 14:24:44,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188391388] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:44,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:44,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:24:44,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534933353] [2025-03-17 14:24:44,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:44,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:24:44,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:44,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:24:44,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:24:44,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:24:44,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:44,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:44,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:24:44,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:44,759 INFO L124 PetriNetUnfolderBase]: 68/123 cut-off events. [2025-03-17 14:24:44,759 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-03-17 14:24:44,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 123 events. 68/123 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 317 event pairs, 22 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2025-03-17 14:24:44,761 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 21 selfloop transitions, 3 changer transitions 1/26 dead transitions. [2025-03-17 14:24:44,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2025-03-17 14:24:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:24:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:24:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2025-03-17 14:24:44,779 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2025-03-17 14:24:44,780 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 3 states and 39 transitions. [2025-03-17 14:24:44,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2025-03-17 14:24:44,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:24:44,785 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2025-03-17 14:24:44,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2025-03-17 14:24:44,790 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2025-03-17 14:24:44,790 INFO L471 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2025-03-17 14:24:44,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:44,791 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:44,791 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:44,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:24:44,791 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:24:44,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:44,793 INFO L85 PathProgramCache]: Analyzing trace with hash -714554257, now seen corresponding path program 1 times [2025-03-17 14:24:44,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:44,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679950877] [2025-03-17 14:24:44,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:44,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:44,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:24:44,817 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:44,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:44,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:45,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:45,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679950877] [2025-03-17 14:24:45,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679950877] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:45,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383808087] [2025-03-17 14:24:45,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:45,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:45,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:45,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:45,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:24:45,067 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:24:45,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:45,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:45,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:45,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:24:45,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:45,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:45,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383808087] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:45,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:45,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2025-03-17 14:24:45,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489326424] [2025-03-17 14:24:45,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:45,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:24:45,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:45,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:24:45,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:24:45,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:24:45,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:45,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:45,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:24:45,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:45,545 INFO L124 PetriNetUnfolderBase]: 70/131 cut-off events. [2025-03-17 14:24:45,545 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-17 14:24:45,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 131 events. 70/131 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 352 event pairs, 12 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 104. Up to 70 conditions per place. [2025-03-17 14:24:45,547 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 23 selfloop transitions, 5 changer transitions 12/41 dead transitions. [2025-03-17 14:24:45,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 41 transitions, 196 flow [2025-03-17 14:24:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:24:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:24:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2025-03-17 14:24:45,548 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-17 14:24:45,549 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 65 transitions. [2025-03-17 14:24:45,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 41 transitions, 196 flow [2025-03-17 14:24:45,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 41 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:24:45,550 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2025-03-17 14:24:45,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2025-03-17 14:24:45,552 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2025-03-17 14:24:45,555 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2025-03-17 14:24:45,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:45,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:45,555 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:45,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:45,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:45,756 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:24:45,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:45,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1582659765, now seen corresponding path program 2 times [2025-03-17 14:24:45,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:45,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979755356] [2025-03-17 14:24:45,760 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:45,765 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:24:45,772 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:45,772 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:45,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:45,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:45,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979755356] [2025-03-17 14:24:45,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979755356] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:45,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586034590] [2025-03-17 14:24:45,971 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:45,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:45,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:45,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:45,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:24:46,004 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:24:46,015 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:46,015 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:46,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:46,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:24:46,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:46,109 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:46,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586034590] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:46,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:46,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 13 [2025-03-17 14:24:46,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569730251] [2025-03-17 14:24:46,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:46,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:24:46,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:46,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:24:46,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:24:46,227 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:24:46,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:46,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:46,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:24:46,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:46,420 INFO L124 PetriNetUnfolderBase]: 113/210 cut-off events. [2025-03-17 14:24:46,421 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2025-03-17 14:24:46,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 210 events. 113/210 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 681 event pairs, 11 based on Foata normal form. 3/213 useless extension candidates. Maximal degree in co-relation 555. Up to 87 conditions per place. [2025-03-17 14:24:46,423 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 38 selfloop transitions, 20 changer transitions 9/68 dead transitions. [2025-03-17 14:24:46,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 68 transitions, 363 flow [2025-03-17 14:24:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:24:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:24:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2025-03-17 14:24:46,424 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2025-03-17 14:24:46,425 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 11 states and 113 transitions. [2025-03-17 14:24:46,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 68 transitions, 363 flow [2025-03-17 14:24:46,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 68 transitions, 341 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-17 14:24:46,427 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 201 flow [2025-03-17 14:24:46,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=201, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2025-03-17 14:24:46,428 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 16 predicate places. [2025-03-17 14:24:46,428 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 201 flow [2025-03-17 14:24:46,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:46,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:46,428 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:46,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:46,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-17 14:24:46,632 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:24:46,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:46,633 INFO L85 PathProgramCache]: Analyzing trace with hash 336649857, now seen corresponding path program 1 times [2025-03-17 14:24:46,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:46,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270671726] [2025-03-17 14:24:46,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:46,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:46,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:24:46,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:46,648 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:46,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:46,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:46,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270671726] [2025-03-17 14:24:46,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270671726] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:46,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544061343] [2025-03-17 14:24:46,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:46,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:46,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:46,762 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:46,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:24:46,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:24:46,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:46,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:46,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:46,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:24:46,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:46,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:46,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544061343] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:46,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:46,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2025-03-17 14:24:46,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092806462] [2025-03-17 14:24:46,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:46,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:24:46,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:46,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:24:46,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:24:46,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:24:46,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 201 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:46,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:46,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:24:46,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:47,049 INFO L124 PetriNetUnfolderBase]: 117/221 cut-off events. [2025-03-17 14:24:47,049 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2025-03-17 14:24:47,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 221 events. 117/221 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 743 event pairs, 19 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 740. Up to 171 conditions per place. [2025-03-17 14:24:47,051 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 33 selfloop transitions, 6 changer transitions 12/52 dead transitions. [2025-03-17 14:24:47,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 367 flow [2025-03-17 14:24:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:24:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:24:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2025-03-17 14:24:47,053 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-03-17 14:24:47,053 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 201 flow. Second operand 6 states and 63 transitions. [2025-03-17 14:24:47,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 367 flow [2025-03-17 14:24:47,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 315 flow, removed 20 selfloop flow, removed 3 redundant places. [2025-03-17 14:24:47,056 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 162 flow [2025-03-17 14:24:47,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2025-03-17 14:24:47,056 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2025-03-17 14:24:47,057 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 162 flow [2025-03-17 14:24:47,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:47,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:47,057 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:47,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:47,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:47,261 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:24:47,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1110104581, now seen corresponding path program 3 times [2025-03-17 14:24:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:47,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290838080] [2025-03-17 14:24:47,262 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:47,267 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:24:47,273 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:47,274 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:24:47,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:47,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:47,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290838080] [2025-03-17 14:24:47,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290838080] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:47,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958057330] [2025-03-17 14:24:47,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:47,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:47,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:47,418 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:47,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:24:47,442 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:24:47,452 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:47,452 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:24:47,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:47,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:24:47,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:47,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:47,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958057330] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:47,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:47,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 12 [2025-03-17 14:24:47,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048152312] [2025-03-17 14:24:47,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:47,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:24:47,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:47,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:24:47,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:24:47,714 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:24:47,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 162 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:47,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:47,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:24:47,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:47,835 INFO L124 PetriNetUnfolderBase]: 120/220 cut-off events. [2025-03-17 14:24:47,835 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2025-03-17 14:24:47,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 220 events. 120/220 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 716 event pairs, 18 based on Foata normal form. 2/218 useless extension candidates. Maximal degree in co-relation 688. Up to 161 conditions per place. [2025-03-17 14:24:47,837 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 38 selfloop transitions, 17 changer transitions 6/62 dead transitions. [2025-03-17 14:24:47,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 395 flow [2025-03-17 14:24:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:24:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:24:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2025-03-17 14:24:47,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-17 14:24:47,840 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 162 flow. Second operand 9 states and 87 transitions. [2025-03-17 14:24:47,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 395 flow [2025-03-17 14:24:47,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 375 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-17 14:24:47,842 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 261 flow [2025-03-17 14:24:47,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2025-03-17 14:24:47,843 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2025-03-17 14:24:47,843 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 261 flow [2025-03-17 14:24:47,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:47,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:47,843 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:47,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:48,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:48,047 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:24:48,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:48,047 INFO L85 PathProgramCache]: Analyzing trace with hash -887772265, now seen corresponding path program 2 times [2025-03-17 14:24:48,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:48,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100062587] [2025-03-17 14:24:48,048 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:48,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:48,051 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:24:48,056 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:48,056 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:48,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:48,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:48,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100062587] [2025-03-17 14:24:48,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100062587] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:48,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846982882] [2025-03-17 14:24:48,154 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:48,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:48,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:48,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:48,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:24:48,181 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:24:48,192 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:48,192 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:48,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:48,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:24:48,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:48,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:48,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846982882] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:48,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:48,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2025-03-17 14:24:48,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055799553] [2025-03-17 14:24:48,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:48,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:24:48,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:48,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:24:48,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:24:48,360 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:24:48,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:48,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:48,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:24:48,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:48,457 INFO L124 PetriNetUnfolderBase]: 148/270 cut-off events. [2025-03-17 14:24:48,457 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2025-03-17 14:24:48,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 270 events. 148/270 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 947 event pairs, 24 based on Foata normal form. 2/268 useless extension candidates. Maximal degree in co-relation 924. Up to 211 conditions per place. [2025-03-17 14:24:48,460 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 48 selfloop transitions, 17 changer transitions 4/70 dead transitions. [2025-03-17 14:24:48,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 525 flow [2025-03-17 14:24:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:24:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:24:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2025-03-17 14:24:48,463 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-17 14:24:48,463 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 261 flow. Second operand 8 states and 80 transitions. [2025-03-17 14:24:48,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 525 flow [2025-03-17 14:24:48,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 475 flow, removed 16 selfloop flow, removed 3 redundant places. [2025-03-17 14:24:48,469 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 314 flow [2025-03-17 14:24:48,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2025-03-17 14:24:48,470 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 31 predicate places. [2025-03-17 14:24:48,470 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 314 flow [2025-03-17 14:24:48,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:48,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:48,471 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:48,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 14:24:48,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:48,672 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:24:48,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash 346717983, now seen corresponding path program 3 times [2025-03-17 14:24:48,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:48,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491304011] [2025-03-17 14:24:48,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:48,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:48,675 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:24:48,680 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:48,680 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:24:48,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:48,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:48,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491304011] [2025-03-17 14:24:48,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491304011] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:48,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422664571] [2025-03-17 14:24:48,801 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:24:48,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:48,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:48,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:48,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:24:48,835 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-17 14:24:48,845 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:24:48,845 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:24:48,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:48,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:24:48,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:48,890 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:48,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422664571] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:48,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:48,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2025-03-17 14:24:48,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994249068] [2025-03-17 14:24:48,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:48,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:24:48,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:48,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:24:48,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:24:48,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:24:48,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 314 flow. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:48,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:48,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:24:48,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:49,088 INFO L124 PetriNetUnfolderBase]: 186/341 cut-off events. [2025-03-17 14:24:49,089 INFO L125 PetriNetUnfolderBase]: For 604/604 co-relation queries the response was YES. [2025-03-17 14:24:49,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 341 events. 186/341 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1304 event pairs, 36 based on Foata normal form. 3/340 useless extension candidates. Maximal degree in co-relation 1215. Up to 240 conditions per place. [2025-03-17 14:24:49,093 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 55 selfloop transitions, 22 changer transitions 7/85 dead transitions. [2025-03-17 14:24:49,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 653 flow [2025-03-17 14:24:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:24:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:24:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2025-03-17 14:24:49,094 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.485 [2025-03-17 14:24:49,094 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 314 flow. Second operand 10 states and 97 transitions. [2025-03-17 14:24:49,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 653 flow [2025-03-17 14:24:49,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 601 flow, removed 17 selfloop flow, removed 3 redundant places. [2025-03-17 14:24:49,100 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 404 flow [2025-03-17 14:24:49,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=404, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2025-03-17 14:24:49,101 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2025-03-17 14:24:49,102 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 404 flow [2025-03-17 14:24:49,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:49,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:49,102 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:49,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 14:24:49,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:49,303 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:24:49,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:49,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1840028788, now seen corresponding path program 1 times [2025-03-17 14:24:49,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:49,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041316537] [2025-03-17 14:24:49,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:49,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:49,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:24:49,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:24:49,316 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:49,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:49,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:49,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041316537] [2025-03-17 14:24:49,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041316537] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:49,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84491985] [2025-03-17 14:24:49,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:49,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:49,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:49,587 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:49,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:24:49,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:24:49,624 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:24:49,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:49,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:49,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:24:49,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:49,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:50,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84491985] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:50,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:50,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:24:50,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392149741] [2025-03-17 14:24:50,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:50,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:24:50,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:50,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:24:50,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:24:50,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:24:50,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 404 flow. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:50,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:50,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:24:50,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:52,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:24:56,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:24:57,132 INFO L124 PetriNetUnfolderBase]: 256/488 cut-off events. [2025-03-17 14:24:57,132 INFO L125 PetriNetUnfolderBase]: For 962/962 co-relation queries the response was YES. [2025-03-17 14:24:57,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1827 conditions, 488 events. 256/488 cut-off events. For 962/962 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2225 event pairs, 23 based on Foata normal form. 3/487 useless extension candidates. Maximal degree in co-relation 1724. Up to 237 conditions per place. [2025-03-17 14:24:57,135 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 83 selfloop transitions, 52 changer transitions 30/166 dead transitions. [2025-03-17 14:24:57,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 166 transitions, 1195 flow [2025-03-17 14:24:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 14:24:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 14:24:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 223 transitions. [2025-03-17 14:24:57,138 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46458333333333335 [2025-03-17 14:24:57,138 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 404 flow. Second operand 24 states and 223 transitions. [2025-03-17 14:24:57,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 166 transitions, 1195 flow [2025-03-17 14:24:57,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 166 transitions, 1129 flow, removed 27 selfloop flow, removed 3 redundant places. [2025-03-17 14:24:57,144 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 658 flow [2025-03-17 14:24:57,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=658, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2025-03-17 14:24:57,145 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2025-03-17 14:24:57,145 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 658 flow [2025-03-17 14:24:57,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:57,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:57,145 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:57,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 14:24:57,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:57,346 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:24:57,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash 11349870, now seen corresponding path program 2 times [2025-03-17 14:24:57,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:57,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249282653] [2025-03-17 14:24:57,346 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:57,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:57,349 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:24:57,356 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:24:57,356 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:57,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:57,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:57,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249282653] [2025-03-17 14:24:57,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249282653] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:57,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173615686] [2025-03-17 14:24:57,625 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:57,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:57,628 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:57,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:24:57,660 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:24:57,673 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:24:57,673 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:57,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:57,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:24:57,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:57,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:24:58,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173615686] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:58,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:58,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-17 14:24:58,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110101375] [2025-03-17 14:24:58,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:58,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:24:58,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:58,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:24:58,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:24:58,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:24:58,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 658 flow. Second operand has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:58,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:58,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:24:58,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:00,022 INFO L124 PetriNetUnfolderBase]: 290/562 cut-off events. [2025-03-17 14:25:00,022 INFO L125 PetriNetUnfolderBase]: For 2921/2921 co-relation queries the response was YES. [2025-03-17 14:25:00,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2664 conditions, 562 events. 290/562 cut-off events. For 2921/2921 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2702 event pairs, 20 based on Foata normal form. 3/561 useless extension candidates. Maximal degree in co-relation 2540. Up to 246 conditions per place. [2025-03-17 14:25:00,027 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 89 selfloop transitions, 79 changer transitions 16/185 dead transitions. [2025-03-17 14:25:00,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 185 transitions, 1688 flow [2025-03-17 14:25:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 14:25:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-17 14:25:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 246 transitions. [2025-03-17 14:25:00,030 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2025-03-17 14:25:00,030 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 658 flow. Second operand 27 states and 246 transitions. [2025-03-17 14:25:00,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 185 transitions, 1688 flow [2025-03-17 14:25:00,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 185 transitions, 1487 flow, removed 80 selfloop flow, removed 12 redundant places. [2025-03-17 14:25:00,039 INFO L231 Difference]: Finished difference. Result has 109 places, 119 transitions, 1131 flow [2025-03-17 14:25:00,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1131, PETRI_PLACES=109, PETRI_TRANSITIONS=119} [2025-03-17 14:25:00,040 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 87 predicate places. [2025-03-17 14:25:00,040 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 119 transitions, 1131 flow [2025-03-17 14:25:00,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:00,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:00,041 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:00,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 14:25:00,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-17 14:25:00,242 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:00,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash -37805280, now seen corresponding path program 3 times [2025-03-17 14:25:00,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:00,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884738030] [2025-03-17 14:25:00,243 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:25:00,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:00,245 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:00,254 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:00,256 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:25:00,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:00,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:00,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884738030] [2025-03-17 14:25:00,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884738030] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:00,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067437884] [2025-03-17 14:25:00,549 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:25:00,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:00,551 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:00,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:25:00,572 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:00,598 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:00,598 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:25:00,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:00,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:00,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:00,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:00,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067437884] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:00,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:00,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-17 14:25:00,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872639712] [2025-03-17 14:25:00,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:00,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:25:00,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:00,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:25:00,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:25:00,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:00,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 119 transitions, 1131 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:00,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:00,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:00,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:01,847 INFO L124 PetriNetUnfolderBase]: 289/559 cut-off events. [2025-03-17 14:25:01,848 INFO L125 PetriNetUnfolderBase]: For 3264/3264 co-relation queries the response was YES. [2025-03-17 14:25:01,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2896 conditions, 559 events. 289/559 cut-off events. For 3264/3264 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2679 event pairs, 20 based on Foata normal form. 3/556 useless extension candidates. Maximal degree in co-relation 2746. Up to 252 conditions per place. [2025-03-17 14:25:01,852 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 85 selfloop transitions, 81 changer transitions 14/181 dead transitions. [2025-03-17 14:25:01,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 181 transitions, 1824 flow [2025-03-17 14:25:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 14:25:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-17 14:25:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 216 transitions. [2025-03-17 14:25:01,853 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46956521739130436 [2025-03-17 14:25:01,853 INFO L175 Difference]: Start difference. First operand has 109 places, 119 transitions, 1131 flow. Second operand 23 states and 216 transitions. [2025-03-17 14:25:01,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 181 transitions, 1824 flow [2025-03-17 14:25:01,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 181 transitions, 1440 flow, removed 168 selfloop flow, removed 10 redundant places. [2025-03-17 14:25:01,866 INFO L231 Difference]: Finished difference. Result has 121 places, 124 transitions, 1071 flow [2025-03-17 14:25:01,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1071, PETRI_PLACES=121, PETRI_TRANSITIONS=124} [2025-03-17 14:25:01,867 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 99 predicate places. [2025-03-17 14:25:01,867 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 124 transitions, 1071 flow [2025-03-17 14:25:01,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:01,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:01,867 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:01,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 14:25:02,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-17 14:25:02,068 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:02,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash -958790094, now seen corresponding path program 4 times [2025-03-17 14:25:02,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:02,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462443774] [2025-03-17 14:25:02,068 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:25:02,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:02,074 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:02,086 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:02,086 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:25:02,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:02,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:02,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462443774] [2025-03-17 14:25:02,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462443774] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:02,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711731668] [2025-03-17 14:25:02,311 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:25:02,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:02,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:02,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:02,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:25:02,339 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:02,385 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:02,385 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:25:02,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:02,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:02,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:02,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:03,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711731668] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:03,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:03,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:25:03,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700923860] [2025-03-17 14:25:03,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:03,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:25:03,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:03,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:25:03,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:25:03,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:03,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 124 transitions, 1071 flow. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:03,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:03,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:03,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:03,582 INFO L124 PetriNetUnfolderBase]: 327/630 cut-off events. [2025-03-17 14:25:03,582 INFO L125 PetriNetUnfolderBase]: For 2059/2059 co-relation queries the response was YES. [2025-03-17 14:25:03,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3008 conditions, 630 events. 327/630 cut-off events. For 2059/2059 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3108 event pairs, 37 based on Foata normal form. 3/619 useless extension candidates. Maximal degree in co-relation 2963. Up to 504 conditions per place. [2025-03-17 14:25:03,588 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 132 selfloop transitions, 37 changer transitions 14/184 dead transitions. [2025-03-17 14:25:03,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 184 transitions, 1803 flow [2025-03-17 14:25:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 14:25:03,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 14:25:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 147 transitions. [2025-03-17 14:25:03,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.459375 [2025-03-17 14:25:03,589 INFO L175 Difference]: Start difference. First operand has 121 places, 124 transitions, 1071 flow. Second operand 16 states and 147 transitions. [2025-03-17 14:25:03,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 184 transitions, 1803 flow [2025-03-17 14:25:03,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 184 transitions, 1626 flow, removed 42 selfloop flow, removed 17 redundant places. [2025-03-17 14:25:03,602 INFO L231 Difference]: Finished difference. Result has 127 places, 145 transitions, 1279 flow [2025-03-17 14:25:03,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1279, PETRI_PLACES=127, PETRI_TRANSITIONS=145} [2025-03-17 14:25:03,603 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 105 predicate places. [2025-03-17 14:25:03,603 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 145 transitions, 1279 flow [2025-03-17 14:25:03,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:03,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:03,604 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:03,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:03,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-17 14:25:03,808 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:03,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1500754866, now seen corresponding path program 5 times [2025-03-17 14:25:03,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:03,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085977520] [2025-03-17 14:25:03,809 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:25:03,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:03,812 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:03,818 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:03,818 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:03,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:04,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:04,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085977520] [2025-03-17 14:25:04,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085977520] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:04,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273522535] [2025-03-17 14:25:04,076 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:25:04,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:04,078 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:04,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:25:04,099 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:04,122 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:04,122 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:04,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:04,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:04,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:04,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:05,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273522535] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:05,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:05,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:25:05,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164119973] [2025-03-17 14:25:05,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:05,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:25:05,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:05,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:25:05,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:25:05,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:05,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 145 transitions, 1279 flow. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:05,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:05,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:05,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:07,630 INFO L124 PetriNetUnfolderBase]: 343/671 cut-off events. [2025-03-17 14:25:07,630 INFO L125 PetriNetUnfolderBase]: For 2323/2323 co-relation queries the response was YES. [2025-03-17 14:25:07,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3375 conditions, 671 events. 343/671 cut-off events. For 2323/2323 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3410 event pairs, 40 based on Foata normal form. 2/663 useless extension candidates. Maximal degree in co-relation 3294. Up to 510 conditions per place. [2025-03-17 14:25:07,635 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 131 selfloop transitions, 51 changer transitions 11/194 dead transitions. [2025-03-17 14:25:07,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 194 transitions, 1978 flow [2025-03-17 14:25:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-17 14:25:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-17 14:25:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 160 transitions. [2025-03-17 14:25:07,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2025-03-17 14:25:07,636 INFO L175 Difference]: Start difference. First operand has 127 places, 145 transitions, 1279 flow. Second operand 18 states and 160 transitions. [2025-03-17 14:25:07,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 194 transitions, 1978 flow [2025-03-17 14:25:07,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 194 transitions, 1881 flow, removed 43 selfloop flow, removed 3 redundant places. [2025-03-17 14:25:07,648 INFO L231 Difference]: Finished difference. Result has 143 places, 156 transitions, 1494 flow [2025-03-17 14:25:07,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1494, PETRI_PLACES=143, PETRI_TRANSITIONS=156} [2025-03-17 14:25:07,649 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 121 predicate places. [2025-03-17 14:25:07,649 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 156 transitions, 1494 flow [2025-03-17 14:25:07,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:07,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:07,649 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:07,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 14:25:07,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-17 14:25:07,850 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:07,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:07,851 INFO L85 PathProgramCache]: Analyzing trace with hash 527363732, now seen corresponding path program 4 times [2025-03-17 14:25:07,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:07,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793162795] [2025-03-17 14:25:07,851 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:25:07,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:07,853 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:07,859 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:07,859 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:25:07,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:07,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:07,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793162795] [2025-03-17 14:25:07,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793162795] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:07,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855169156] [2025-03-17 14:25:07,960 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:25:07,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:07,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:07,963 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:07,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:25:07,988 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:08,002 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:08,002 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:25:08,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:08,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:25:08,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:08,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:08,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855169156] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:08,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:08,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2025-03-17 14:25:08,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702311589] [2025-03-17 14:25:08,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:08,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:25:08,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:08,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:25:08,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:25:08,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:08,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 156 transitions, 1494 flow. Second operand has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:08,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:08,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:08,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:08,641 INFO L124 PetriNetUnfolderBase]: 342/660 cut-off events. [2025-03-17 14:25:08,641 INFO L125 PetriNetUnfolderBase]: For 2670/2670 co-relation queries the response was YES. [2025-03-17 14:25:08,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3493 conditions, 660 events. 342/660 cut-off events. For 2670/2670 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3294 event pairs, 38 based on Foata normal form. 3/655 useless extension candidates. Maximal degree in co-relation 3397. Up to 547 conditions per place. [2025-03-17 14:25:08,645 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 135 selfloop transitions, 41 changer transitions 13/190 dead transitions. [2025-03-17 14:25:08,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 190 transitions, 2044 flow [2025-03-17 14:25:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 14:25:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 14:25:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 134 transitions. [2025-03-17 14:25:08,646 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2025-03-17 14:25:08,646 INFO L175 Difference]: Start difference. First operand has 143 places, 156 transitions, 1494 flow. Second operand 16 states and 134 transitions. [2025-03-17 14:25:08,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 190 transitions, 2044 flow [2025-03-17 14:25:08,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 190 transitions, 1896 flow, removed 49 selfloop flow, removed 9 redundant places. [2025-03-17 14:25:08,658 INFO L231 Difference]: Finished difference. Result has 154 places, 159 transitions, 1538 flow [2025-03-17 14:25:08,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1538, PETRI_PLACES=154, PETRI_TRANSITIONS=159} [2025-03-17 14:25:08,659 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 132 predicate places. [2025-03-17 14:25:08,659 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 159 transitions, 1538 flow [2025-03-17 14:25:08,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:08,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:08,659 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:08,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:08,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 14:25:08,864 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:08,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:08,864 INFO L85 PathProgramCache]: Analyzing trace with hash 627014186, now seen corresponding path program 6 times [2025-03-17 14:25:08,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:08,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176850698] [2025-03-17 14:25:08,864 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:25:08,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:08,867 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:08,875 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:08,875 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:25:08,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:09,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:09,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176850698] [2025-03-17 14:25:09,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176850698] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:09,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957559218] [2025-03-17 14:25:09,128 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:25:09,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:09,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:09,130 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:09,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:25:09,155 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:09,167 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:09,167 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:25:09,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:09,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:09,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:09,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:09,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957559218] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:09,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:09,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:25:09,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316951282] [2025-03-17 14:25:09,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:09,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:25:09,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:09,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:25:09,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:25:09,860 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:09,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 159 transitions, 1538 flow. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:09,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:09,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:09,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:10,520 INFO L124 PetriNetUnfolderBase]: 388/742 cut-off events. [2025-03-17 14:25:10,520 INFO L125 PetriNetUnfolderBase]: For 3819/3819 co-relation queries the response was YES. [2025-03-17 14:25:10,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4221 conditions, 742 events. 388/742 cut-off events. For 3819/3819 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3827 event pairs, 38 based on Foata normal form. 2/734 useless extension candidates. Maximal degree in co-relation 4115. Up to 587 conditions per place. [2025-03-17 14:25:10,525 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 166 selfloop transitions, 56 changer transitions 7/230 dead transitions. [2025-03-17 14:25:10,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 230 transitions, 2635 flow [2025-03-17 14:25:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-17 14:25:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-17 14:25:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 191 transitions. [2025-03-17 14:25:10,526 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2025-03-17 14:25:10,527 INFO L175 Difference]: Start difference. First operand has 154 places, 159 transitions, 1538 flow. Second operand 22 states and 191 transitions. [2025-03-17 14:25:10,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 230 transitions, 2635 flow [2025-03-17 14:25:10,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 230 transitions, 2505 flow, removed 22 selfloop flow, removed 13 redundant places. [2025-03-17 14:25:10,542 INFO L231 Difference]: Finished difference. Result has 167 places, 186 transitions, 2004 flow [2025-03-17 14:25:10,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2004, PETRI_PLACES=167, PETRI_TRANSITIONS=186} [2025-03-17 14:25:10,542 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 145 predicate places. [2025-03-17 14:25:10,542 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 186 transitions, 2004 flow [2025-03-17 14:25:10,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:10,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:10,543 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:10,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 14:25:10,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 14:25:10,744 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:10,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:10,744 INFO L85 PathProgramCache]: Analyzing trace with hash 577859036, now seen corresponding path program 7 times [2025-03-17 14:25:10,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:10,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851121821] [2025-03-17 14:25:10,744 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:25:10,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:10,746 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:25:10,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:10,751 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:10,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:10,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:10,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851121821] [2025-03-17 14:25:10,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851121821] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:10,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065453003] [2025-03-17 14:25:10,971 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:25:10,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:10,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:10,973 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:10,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:25:10,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:25:11,009 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:11,009 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:11,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:11,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:11,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:11,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:11,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065453003] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:11,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:11,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:25:11,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660555146] [2025-03-17 14:25:11,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:11,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:25:11,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:11,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:25:11,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:25:11,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:11,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 186 transitions, 2004 flow. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:11,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:11,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:11,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:12,336 INFO L124 PetriNetUnfolderBase]: 384/726 cut-off events. [2025-03-17 14:25:12,336 INFO L125 PetriNetUnfolderBase]: For 4653/4653 co-relation queries the response was YES. [2025-03-17 14:25:12,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4302 conditions, 726 events. 384/726 cut-off events. For 4653/4653 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3682 event pairs, 38 based on Foata normal form. 2/718 useless extension candidates. Maximal degree in co-relation 4215. Up to 587 conditions per place. [2025-03-17 14:25:12,342 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 157 selfloop transitions, 56 changer transitions 8/222 dead transitions. [2025-03-17 14:25:12,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 222 transitions, 2615 flow [2025-03-17 14:25:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 14:25:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 14:25:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 173 transitions. [2025-03-17 14:25:12,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2025-03-17 14:25:12,343 INFO L175 Difference]: Start difference. First operand has 167 places, 186 transitions, 2004 flow. Second operand 21 states and 173 transitions. [2025-03-17 14:25:12,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 222 transitions, 2615 flow [2025-03-17 14:25:12,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 222 transitions, 2369 flow, removed 107 selfloop flow, removed 8 redundant places. [2025-03-17 14:25:12,361 INFO L231 Difference]: Finished difference. Result has 182 places, 188 transitions, 1965 flow [2025-03-17 14:25:12,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1965, PETRI_PLACES=182, PETRI_TRANSITIONS=188} [2025-03-17 14:25:12,362 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 160 predicate places. [2025-03-17 14:25:12,362 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 188 transitions, 1965 flow [2025-03-17 14:25:12,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:12,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:12,362 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:12,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:12,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:12,567 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:12,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1451599716, now seen corresponding path program 8 times [2025-03-17 14:25:12,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:12,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007651349] [2025-03-17 14:25:12,568 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:12,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:12,570 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:12,577 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:12,577 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:12,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:12,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:12,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007651349] [2025-03-17 14:25:12,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007651349] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:12,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418798686] [2025-03-17 14:25:12,846 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:12,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:12,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:12,848 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:12,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 14:25:12,872 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:12,898 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:12,898 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:12,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:12,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:12,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:13,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:13,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418798686] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:13,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:13,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-17 14:25:13,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517417279] [2025-03-17 14:25:13,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:13,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:25:13,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:13,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:25:13,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:25:13,640 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:13,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 188 transitions, 1965 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:13,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:13,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:13,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:14,282 INFO L124 PetriNetUnfolderBase]: 384/723 cut-off events. [2025-03-17 14:25:14,282 INFO L125 PetriNetUnfolderBase]: For 4443/4443 co-relation queries the response was YES. [2025-03-17 14:25:14,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4240 conditions, 723 events. 384/723 cut-off events. For 4443/4443 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3655 event pairs, 36 based on Foata normal form. 2/715 useless extension candidates. Maximal degree in co-relation 4158. Up to 556 conditions per place. [2025-03-17 14:25:14,288 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 150 selfloop transitions, 62 changer transitions 8/221 dead transitions. [2025-03-17 14:25:14,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 221 transitions, 2575 flow [2025-03-17 14:25:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 14:25:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 14:25:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 144 transitions. [2025-03-17 14:25:14,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-17 14:25:14,289 INFO L175 Difference]: Start difference. First operand has 182 places, 188 transitions, 1965 flow. Second operand 16 states and 144 transitions. [2025-03-17 14:25:14,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 221 transitions, 2575 flow [2025-03-17 14:25:14,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 221 transitions, 2436 flow, removed 24 selfloop flow, removed 18 redundant places. [2025-03-17 14:25:14,309 INFO L231 Difference]: Finished difference. Result has 179 places, 190 transitions, 2037 flow [2025-03-17 14:25:14,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2037, PETRI_PLACES=179, PETRI_TRANSITIONS=190} [2025-03-17 14:25:14,310 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2025-03-17 14:25:14,310 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 190 transitions, 2037 flow [2025-03-17 14:25:14,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:14,310 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:14,310 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:14,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:14,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 14:25:14,512 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:14,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:14,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1091329520, now seen corresponding path program 9 times [2025-03-17 14:25:14,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:14,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517492812] [2025-03-17 14:25:14,513 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:25:14,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:14,515 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:14,520 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:14,521 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:25:14,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:14,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517492812] [2025-03-17 14:25:14,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517492812] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121200349] [2025-03-17 14:25:14,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:25:14,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:14,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:14,713 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:14,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 14:25:14,739 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:14,751 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:14,751 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:25:14,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:14,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:14,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:14,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:15,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121200349] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:15,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:15,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:25:15,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348942485] [2025-03-17 14:25:15,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:15,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:25:15,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:15,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:25:15,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:25:15,377 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:15,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 190 transitions, 2037 flow. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:15,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:15,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:15,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:15,767 INFO L124 PetriNetUnfolderBase]: 385/737 cut-off events. [2025-03-17 14:25:15,767 INFO L125 PetriNetUnfolderBase]: For 4382/4382 co-relation queries the response was YES. [2025-03-17 14:25:15,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4359 conditions, 737 events. 385/737 cut-off events. For 4382/4382 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3766 event pairs, 38 based on Foata normal form. 3/730 useless extension candidates. Maximal degree in co-relation 4245. Up to 635 conditions per place. [2025-03-17 14:25:15,772 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 173 selfloop transitions, 43 changer transitions 7/224 dead transitions. [2025-03-17 14:25:15,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 224 transitions, 2696 flow [2025-03-17 14:25:15,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-17 14:25:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-17 14:25:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 149 transitions. [2025-03-17 14:25:15,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2025-03-17 14:25:15,773 INFO L175 Difference]: Start difference. First operand has 179 places, 190 transitions, 2037 flow. Second operand 18 states and 149 transitions. [2025-03-17 14:25:15,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 224 transitions, 2696 flow [2025-03-17 14:25:15,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 224 transitions, 2613 flow, removed 24 selfloop flow, removed 10 redundant places. [2025-03-17 14:25:15,791 INFO L231 Difference]: Finished difference. Result has 191 places, 195 transitions, 2169 flow [2025-03-17 14:25:15,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2169, PETRI_PLACES=191, PETRI_TRANSITIONS=195} [2025-03-17 14:25:15,792 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 169 predicate places. [2025-03-17 14:25:15,792 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 195 transitions, 2169 flow [2025-03-17 14:25:15,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:15,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:15,792 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:15,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-17 14:25:15,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:25:15,996 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:15,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1983199184, now seen corresponding path program 10 times [2025-03-17 14:25:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:15,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127920164] [2025-03-17 14:25:15,996 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:25:15,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:15,998 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:16,002 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:16,002 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:25:16,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:16,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:16,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127920164] [2025-03-17 14:25:16,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127920164] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:16,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20246105] [2025-03-17 14:25:16,194 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:25:16,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:16,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:16,196 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:16,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 14:25:16,217 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:16,247 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:16,247 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:25:16,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:16,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:16,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:16,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:16,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20246105] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:16,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:16,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:25:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624296801] [2025-03-17 14:25:16,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:16,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:25:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:16,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:25:16,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:25:16,840 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:16,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 195 transitions, 2169 flow. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:16,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:16,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:16,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:17,473 INFO L124 PetriNetUnfolderBase]: 427/817 cut-off events. [2025-03-17 14:25:17,473 INFO L125 PetriNetUnfolderBase]: For 6185/6185 co-relation queries the response was YES. [2025-03-17 14:25:17,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5118 conditions, 817 events. 427/817 cut-off events. For 6185/6185 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4284 event pairs, 40 based on Foata normal form. 2/809 useless extension candidates. Maximal degree in co-relation 5045. Up to 649 conditions per place. [2025-03-17 14:25:17,479 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 190 selfloop transitions, 60 changer transitions 8/259 dead transitions. [2025-03-17 14:25:17,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 259 transitions, 3281 flow [2025-03-17 14:25:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 14:25:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 14:25:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 205 transitions. [2025-03-17 14:25:17,480 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2025-03-17 14:25:17,480 INFO L175 Difference]: Start difference. First operand has 191 places, 195 transitions, 2169 flow. Second operand 24 states and 205 transitions. [2025-03-17 14:25:17,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 259 transitions, 3281 flow [2025-03-17 14:25:17,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 259 transitions, 3173 flow, removed 29 selfloop flow, removed 12 redundant places. [2025-03-17 14:25:17,503 INFO L231 Difference]: Finished difference. Result has 210 places, 215 transitions, 2641 flow [2025-03-17 14:25:17,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2641, PETRI_PLACES=210, PETRI_TRANSITIONS=215} [2025-03-17 14:25:17,503 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 188 predicate places. [2025-03-17 14:25:17,503 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 215 transitions, 2641 flow [2025-03-17 14:25:17,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:17,504 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:17,504 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:17,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-17 14:25:17,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-17 14:25:17,704 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:17,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1998669428, now seen corresponding path program 11 times [2025-03-17 14:25:17,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:17,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896045933] [2025-03-17 14:25:17,705 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:25:17,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:17,707 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:17,711 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:17,711 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:17,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:17,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:17,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896045933] [2025-03-17 14:25:17,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896045933] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:17,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894281187] [2025-03-17 14:25:17,899 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:25:17,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:17,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:17,901 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:17,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 14:25:17,923 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:17,938 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:17,938 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:17,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:17,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:17,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:18,208 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:18,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894281187] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:18,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:18,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-17 14:25:18,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572992440] [2025-03-17 14:25:18,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:18,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:25:18,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:18,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:25:18,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:25:18,459 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:18,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 215 transitions, 2641 flow. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:18,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:18,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:18,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:20,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:25:25,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:25:29,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:25:30,614 INFO L124 PetriNetUnfolderBase]: 473/914 cut-off events. [2025-03-17 14:25:30,615 INFO L125 PetriNetUnfolderBase]: For 10208/10208 co-relation queries the response was YES. [2025-03-17 14:25:30,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6037 conditions, 914 events. 473/914 cut-off events. For 10208/10208 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 5012 event pairs, 35 based on Foata normal form. 3/907 useless extension candidates. Maximal degree in co-relation 5909. Up to 683 conditions per place. [2025-03-17 14:25:30,622 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 195 selfloop transitions, 74 changer transitions 27/297 dead transitions. [2025-03-17 14:25:30,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 297 transitions, 3949 flow [2025-03-17 14:25:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 14:25:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 14:25:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 207 transitions. [2025-03-17 14:25:30,623 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43125 [2025-03-17 14:25:30,623 INFO L175 Difference]: Start difference. First operand has 210 places, 215 transitions, 2641 flow. Second operand 24 states and 207 transitions. [2025-03-17 14:25:30,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 297 transitions, 3949 flow [2025-03-17 14:25:30,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 297 transitions, 3553 flow, removed 161 selfloop flow, removed 20 redundant places. [2025-03-17 14:25:30,657 INFO L231 Difference]: Finished difference. Result has 222 places, 240 transitions, 2806 flow [2025-03-17 14:25:30,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2806, PETRI_PLACES=222, PETRI_TRANSITIONS=240} [2025-03-17 14:25:30,657 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 200 predicate places. [2025-03-17 14:25:30,657 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 240 transitions, 2806 flow [2025-03-17 14:25:30,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:30,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:30,658 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:30,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:30,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:30,858 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:30,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:30,859 INFO L85 PathProgramCache]: Analyzing trace with hash 544259808, now seen corresponding path program 12 times [2025-03-17 14:25:30,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:30,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905237166] [2025-03-17 14:25:30,859 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:25:30,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:30,861 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:30,865 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:30,865 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:25:30,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:31,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:31,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905237166] [2025-03-17 14:25:31,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905237166] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:31,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306476897] [2025-03-17 14:25:31,109 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:25:31,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:31,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:31,111 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:31,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 14:25:31,133 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:31,180 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:31,181 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:25:31,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:31,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:31,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:31,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:31,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306476897] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:31,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:31,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-17 14:25:31,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424365756] [2025-03-17 14:25:31,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:31,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:25:31,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:31,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:25:31,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:25:31,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:31,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 240 transitions, 2806 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:31,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:31,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:31,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:32,600 INFO L124 PetriNetUnfolderBase]: 504/974 cut-off events. [2025-03-17 14:25:32,600 INFO L125 PetriNetUnfolderBase]: For 13043/13043 co-relation queries the response was YES. [2025-03-17 14:25:32,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6754 conditions, 974 events. 504/974 cut-off events. For 13043/13043 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 5450 event pairs, 36 based on Foata normal form. 3/963 useless extension candidates. Maximal degree in co-relation 6624. Up to 681 conditions per place. [2025-03-17 14:25:32,607 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 196 selfloop transitions, 105 changer transitions 13/315 dead transitions. [2025-03-17 14:25:32,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 315 transitions, 4370 flow [2025-03-17 14:25:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 14:25:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-17 14:25:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 234 transitions. [2025-03-17 14:25:32,608 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-03-17 14:25:32,608 INFO L175 Difference]: Start difference. First operand has 222 places, 240 transitions, 2806 flow. Second operand 27 states and 234 transitions. [2025-03-17 14:25:32,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 315 transitions, 4370 flow [2025-03-17 14:25:32,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 315 transitions, 4023 flow, removed 152 selfloop flow, removed 11 redundant places. [2025-03-17 14:25:32,653 INFO L231 Difference]: Finished difference. Result has 239 places, 263 transitions, 3371 flow [2025-03-17 14:25:32,653 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3371, PETRI_PLACES=239, PETRI_TRANSITIONS=263} [2025-03-17 14:25:32,653 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 217 predicate places. [2025-03-17 14:25:32,653 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 263 transitions, 3371 flow [2025-03-17 14:25:32,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:32,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:32,654 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:32,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:32,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:32,854 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:32,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash -587168296, now seen corresponding path program 13 times [2025-03-17 14:25:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:32,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535747750] [2025-03-17 14:25:32,855 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:25:32,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:32,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:25:32,860 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:32,860 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:32,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:33,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535747750] [2025-03-17 14:25:33,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535747750] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407823070] [2025-03-17 14:25:33,044 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:25:33,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:33,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:33,047 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:33,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 14:25:33,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:25:33,119 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:33,119 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:33,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:33,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:33,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:33,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:34,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407823070] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:34,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:34,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:25:34,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919432798] [2025-03-17 14:25:34,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:34,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:25:34,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:34,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:25:34,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:25:34,327 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:34,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 263 transitions, 3371 flow. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:34,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:34,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:34,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:34,817 INFO L124 PetriNetUnfolderBase]: 510/989 cut-off events. [2025-03-17 14:25:34,818 INFO L125 PetriNetUnfolderBase]: For 13458/13458 co-relation queries the response was YES. [2025-03-17 14:25:34,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6969 conditions, 989 events. 510/989 cut-off events. For 13458/13458 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 5524 event pairs, 41 based on Foata normal form. 3/976 useless extension candidates. Maximal degree in co-relation 6837. Up to 866 conditions per place. [2025-03-17 14:25:34,824 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 243 selfloop transitions, 46 changer transitions 7/297 dead transitions. [2025-03-17 14:25:34,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 297 transitions, 4162 flow [2025-03-17 14:25:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-17 14:25:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-17 14:25:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 154 transitions. [2025-03-17 14:25:34,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2025-03-17 14:25:34,826 INFO L175 Difference]: Start difference. First operand has 239 places, 263 transitions, 3371 flow. Second operand 18 states and 154 transitions. [2025-03-17 14:25:34,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 297 transitions, 4162 flow [2025-03-17 14:25:34,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 297 transitions, 3638 flow, removed 226 selfloop flow, removed 10 redundant places. [2025-03-17 14:25:34,878 INFO L231 Difference]: Finished difference. Result has 247 places, 266 transitions, 3016 flow [2025-03-17 14:25:34,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3016, PETRI_PLACES=247, PETRI_TRANSITIONS=266} [2025-03-17 14:25:34,878 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 225 predicate places. [2025-03-17 14:25:34,878 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 266 transitions, 3016 flow [2025-03-17 14:25:34,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:34,879 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:34,879 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:34,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-17 14:25:35,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-17 14:25:35,079 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:35,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2038610444, now seen corresponding path program 14 times [2025-03-17 14:25:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:35,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811569890] [2025-03-17 14:25:35,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:35,082 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:35,085 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:35,086 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:35,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:35,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811569890] [2025-03-17 14:25:35,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811569890] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722031181] [2025-03-17 14:25:35,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:35,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:35,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:35,256 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:35,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-17 14:25:35,276 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:35,287 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:35,287 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:35,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:35,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:35,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:35,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:36,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722031181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:36,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:36,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-17 14:25:36,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778982828] [2025-03-17 14:25:36,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:36,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:25:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:36,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:25:36,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:25:36,161 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:36,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 266 transitions, 3016 flow. Second operand has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:36,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:36,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:36,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:36,783 INFO L124 PetriNetUnfolderBase]: 504/967 cut-off events. [2025-03-17 14:25:36,783 INFO L125 PetriNetUnfolderBase]: For 9233/9233 co-relation queries the response was YES. [2025-03-17 14:25:36,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6251 conditions, 967 events. 504/967 cut-off events. For 9233/9233 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 5344 event pairs, 36 based on Foata normal form. 2/951 useless extension candidates. Maximal degree in co-relation 6128. Up to 811 conditions per place. [2025-03-17 14:25:36,792 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 231 selfloop transitions, 60 changer transitions 8/300 dead transitions. [2025-03-17 14:25:36,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 300 transitions, 3771 flow [2025-03-17 14:25:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 14:25:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 14:25:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 171 transitions. [2025-03-17 14:25:36,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4275 [2025-03-17 14:25:36,793 INFO L175 Difference]: Start difference. First operand has 247 places, 266 transitions, 3016 flow. Second operand 20 states and 171 transitions. [2025-03-17 14:25:36,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 300 transitions, 3771 flow [2025-03-17 14:25:36,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 300 transitions, 3643 flow, removed 23 selfloop flow, removed 16 redundant places. [2025-03-17 14:25:36,839 INFO L231 Difference]: Finished difference. Result has 252 places, 267 transitions, 3093 flow [2025-03-17 14:25:36,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2884, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3093, PETRI_PLACES=252, PETRI_TRANSITIONS=267} [2025-03-17 14:25:36,840 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 230 predicate places. [2025-03-17 14:25:36,840 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 267 transitions, 3093 flow [2025-03-17 14:25:36,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:36,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:36,840 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:36,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-17 14:25:37,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-17 14:25:37,041 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:37,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:37,041 INFO L85 PathProgramCache]: Analyzing trace with hash -553473942, now seen corresponding path program 15 times [2025-03-17 14:25:37,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:37,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087700493] [2025-03-17 14:25:37,041 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:25:37,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:37,043 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:37,048 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:37,048 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:25:37,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:37,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:37,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087700493] [2025-03-17 14:25:37,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087700493] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:37,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812823644] [2025-03-17 14:25:37,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:25:37,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:37,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:37,234 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:37,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-17 14:25:37,256 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:37,268 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:37,268 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:25:37,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:37,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:37,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:37,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:38,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812823644] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:38,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:38,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:25:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885922242] [2025-03-17 14:25:38,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:38,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:25:38,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:38,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:25:38,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:25:38,112 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:38,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 267 transitions, 3093 flow. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:38,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:38,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:38,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:38,520 INFO L124 PetriNetUnfolderBase]: 516/987 cut-off events. [2025-03-17 14:25:38,520 INFO L125 PetriNetUnfolderBase]: For 11174/11174 co-relation queries the response was YES. [2025-03-17 14:25:38,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6669 conditions, 987 events. 516/987 cut-off events. For 11174/11174 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5474 event pairs, 45 based on Foata normal form. 2/975 useless extension candidates. Maximal degree in co-relation 6551. Up to 885 conditions per place. [2025-03-17 14:25:38,529 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 247 selfloop transitions, 45 changer transitions 6/299 dead transitions. [2025-03-17 14:25:38,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 299 transitions, 4076 flow [2025-03-17 14:25:38,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 14:25:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 14:25:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 133 transitions. [2025-03-17 14:25:38,530 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.415625 [2025-03-17 14:25:38,530 INFO L175 Difference]: Start difference. First operand has 252 places, 267 transitions, 3093 flow. Second operand 16 states and 133 transitions. [2025-03-17 14:25:38,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 299 transitions, 4076 flow [2025-03-17 14:25:38,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 299 transitions, 3909 flow, removed 35 selfloop flow, removed 16 redundant places. [2025-03-17 14:25:38,584 INFO L231 Difference]: Finished difference. Result has 252 places, 275 transitions, 3307 flow [2025-03-17 14:25:38,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2928, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3307, PETRI_PLACES=252, PETRI_TRANSITIONS=275} [2025-03-17 14:25:38,585 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 230 predicate places. [2025-03-17 14:25:38,585 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 275 transitions, 3307 flow [2025-03-17 14:25:38,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:38,585 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:38,585 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:38,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-17 14:25:38,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:38,790 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:38,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash 593414958, now seen corresponding path program 16 times [2025-03-17 14:25:38,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:38,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991362405] [2025-03-17 14:25:38,790 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:25:38,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:38,792 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:38,795 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:38,795 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:25:38,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:39,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:39,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991362405] [2025-03-17 14:25:39,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991362405] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:39,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132606940] [2025-03-17 14:25:39,018 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:25:39,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:39,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:39,020 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:39,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-17 14:25:39,046 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:39,101 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:39,101 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:25:39,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:39,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:39,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:39,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:39,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132606940] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:39,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:39,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-17 14:25:39,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877941246] [2025-03-17 14:25:39,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:39,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:25:39,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:39,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:25:39,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:25:39,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:39,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 275 transitions, 3307 flow. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:39,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:39,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:39,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:40,350 INFO L124 PetriNetUnfolderBase]: 517/992 cut-off events. [2025-03-17 14:25:40,350 INFO L125 PetriNetUnfolderBase]: For 10338/10338 co-relation queries the response was YES. [2025-03-17 14:25:40,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 992 events. 517/992 cut-off events. For 10338/10338 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 5529 event pairs, 38 based on Foata normal form. 3/981 useless extension candidates. Maximal degree in co-relation 6453. Up to 708 conditions per place. [2025-03-17 14:25:40,356 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 209 selfloop transitions, 107 changer transitions 12/329 dead transitions. [2025-03-17 14:25:40,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 329 transitions, 4293 flow [2025-03-17 14:25:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-17 14:25:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-17 14:25:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 229 transitions. [2025-03-17 14:25:40,357 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4403846153846154 [2025-03-17 14:25:40,357 INFO L175 Difference]: Start difference. First operand has 252 places, 275 transitions, 3307 flow. Second operand 26 states and 229 transitions. [2025-03-17 14:25:40,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 329 transitions, 4293 flow [2025-03-17 14:25:40,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 329 transitions, 4065 flow, removed 84 selfloop flow, removed 13 redundant places. [2025-03-17 14:25:40,407 INFO L231 Difference]: Finished difference. Result has 265 places, 279 transitions, 3467 flow [2025-03-17 14:25:40,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3467, PETRI_PLACES=265, PETRI_TRANSITIONS=279} [2025-03-17 14:25:40,409 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 243 predicate places. [2025-03-17 14:25:40,409 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 279 transitions, 3467 flow [2025-03-17 14:25:40,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:40,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:40,409 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:40,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-17 14:25:40,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:40,610 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:40,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:40,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1115714614, now seen corresponding path program 17 times [2025-03-17 14:25:40,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:40,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069936060] [2025-03-17 14:25:40,610 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:25:40,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:40,612 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:40,616 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:40,616 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:40,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:40,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:40,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069936060] [2025-03-17 14:25:40,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069936060] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:40,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28463733] [2025-03-17 14:25:40,885 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:25:40,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:40,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:40,907 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:40,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-17 14:25:40,929 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:40,947 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:40,947 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:40,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:40,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:40,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:41,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:41,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28463733] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:41,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:41,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:25:41,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514589435] [2025-03-17 14:25:41,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:41,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:25:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:41,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:25:41,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:25:41,798 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:41,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 279 transitions, 3467 flow. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:41,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:41,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:41,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:46,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:25:47,047 INFO L124 PetriNetUnfolderBase]: 540/1033 cut-off events. [2025-03-17 14:25:47,047 INFO L125 PetriNetUnfolderBase]: For 13859/13859 co-relation queries the response was YES. [2025-03-17 14:25:47,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7309 conditions, 1033 events. 540/1033 cut-off events. For 13859/13859 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 5786 event pairs, 42 based on Foata normal form. 2/1021 useless extension candidates. Maximal degree in co-relation 7215. Up to 869 conditions per place. [2025-03-17 14:25:47,053 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 246 selfloop transitions, 64 changer transitions 8/319 dead transitions. [2025-03-17 14:25:47,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 319 transitions, 4631 flow [2025-03-17 14:25:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-17 14:25:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-17 14:25:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 150 transitions. [2025-03-17 14:25:47,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-17 14:25:47,054 INFO L175 Difference]: Start difference. First operand has 265 places, 279 transitions, 3467 flow. Second operand 18 states and 150 transitions. [2025-03-17 14:25:47,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 319 transitions, 4631 flow [2025-03-17 14:25:47,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 319 transitions, 4256 flow, removed 125 selfloop flow, removed 20 redundant places. [2025-03-17 14:25:47,114 INFO L231 Difference]: Finished difference. Result has 264 places, 289 transitions, 3587 flow [2025-03-17 14:25:47,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3587, PETRI_PLACES=264, PETRI_TRANSITIONS=289} [2025-03-17 14:25:47,114 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 242 predicate places. [2025-03-17 14:25:47,114 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 289 transitions, 3587 flow [2025-03-17 14:25:47,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:47,115 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:47,115 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:47,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-17 14:25:47,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-17 14:25:47,316 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:47,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:47,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1164869764, now seen corresponding path program 18 times [2025-03-17 14:25:47,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:47,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558774702] [2025-03-17 14:25:47,316 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:25:47,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:47,318 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:47,322 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:47,323 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:25:47,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:47,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:47,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558774702] [2025-03-17 14:25:47,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558774702] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:47,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841167548] [2025-03-17 14:25:47,525 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:25:47,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:47,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:47,526 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:47,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-17 14:25:47,547 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:25:47,557 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:47,557 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:25:47,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:47,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:47,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:47,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:48,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841167548] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:48,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:48,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-17 14:25:48,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552261763] [2025-03-17 14:25:48,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:48,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:25:48,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:48,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:25:48,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:25:48,114 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:48,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 289 transitions, 3587 flow. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:48,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:48,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:48,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:48,675 INFO L124 PetriNetUnfolderBase]: 537/1032 cut-off events. [2025-03-17 14:25:48,675 INFO L125 PetriNetUnfolderBase]: For 11074/11074 co-relation queries the response was YES. [2025-03-17 14:25:48,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7146 conditions, 1032 events. 537/1032 cut-off events. For 11074/11074 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 5801 event pairs, 42 based on Foata normal form. 2/1018 useless extension candidates. Maximal degree in co-relation 7022. Up to 871 conditions per place. [2025-03-17 14:25:48,683 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 249 selfloop transitions, 65 changer transitions 7/322 dead transitions. [2025-03-17 14:25:48,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 322 transitions, 4531 flow [2025-03-17 14:25:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 14:25:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 14:25:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 161 transitions. [2025-03-17 14:25:48,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4236842105263158 [2025-03-17 14:25:48,684 INFO L175 Difference]: Start difference. First operand has 264 places, 289 transitions, 3587 flow. Second operand 19 states and 161 transitions. [2025-03-17 14:25:48,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 322 transitions, 4531 flow [2025-03-17 14:25:48,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 322 transitions, 4255 flow, removed 110 selfloop flow, removed 11 redundant places. [2025-03-17 14:25:48,735 INFO L231 Difference]: Finished difference. Result has 272 places, 292 transitions, 3626 flow [2025-03-17 14:25:48,735 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3626, PETRI_PLACES=272, PETRI_TRANSITIONS=292} [2025-03-17 14:25:48,735 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 250 predicate places. [2025-03-17 14:25:48,735 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 292 transitions, 3626 flow [2025-03-17 14:25:48,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:48,735 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:48,735 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:48,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:48,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-17 14:25:48,936 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:25:48,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1038562981, now seen corresponding path program 19 times [2025-03-17 14:25:48,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:48,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881668315] [2025-03-17 14:25:48,936 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:25:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:48,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:25:48,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:25:48,943 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:48,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:49,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:49,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881668315] [2025-03-17 14:25:49,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881668315] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:49,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146432885] [2025-03-17 14:25:49,282 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:25:49,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:49,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:49,284 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:49,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-17 14:25:49,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:25:49,332 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:25:49,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:49,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:49,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 14:25:49,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:49,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:49,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146432885] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:49,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:49,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2025-03-17 14:25:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628662088] [2025-03-17 14:25:49,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:49,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 14:25:49,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:49,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 14:25:49,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2025-03-17 14:25:49,831 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:25:49,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 292 transitions, 3626 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:49,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:49,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:25:49,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:53,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:25:58,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:26:03,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:26:07,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:26:11,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:26:15,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-17 14:26:15,695 INFO L124 PetriNetUnfolderBase]: 643/1223 cut-off events. [2025-03-17 14:26:15,696 INFO L125 PetriNetUnfolderBase]: For 20568/20568 co-relation queries the response was YES. [2025-03-17 14:26:15,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9121 conditions, 1223 events. 643/1223 cut-off events. For 20568/20568 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 7080 event pairs, 26 based on Foata normal form. 4/1209 useless extension candidates. Maximal degree in co-relation 9023. Up to 819 conditions per place. [2025-03-17 14:26:15,705 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 269 selfloop transitions, 113 changer transitions 22/405 dead transitions. [2025-03-17 14:26:15,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 405 transitions, 5761 flow [2025-03-17 14:26:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-17 14:26:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-03-17 14:26:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 295 transitions. [2025-03-17 14:26:15,706 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2025-03-17 14:26:15,706 INFO L175 Difference]: Start difference. First operand has 272 places, 292 transitions, 3626 flow. Second operand 33 states and 295 transitions. [2025-03-17 14:26:15,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 405 transitions, 5761 flow [2025-03-17 14:26:15,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 405 transitions, 5492 flow, removed 99 selfloop flow, removed 15 redundant places. [2025-03-17 14:26:15,777 INFO L231 Difference]: Finished difference. Result has 299 places, 328 transitions, 4475 flow [2025-03-17 14:26:15,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4475, PETRI_PLACES=299, PETRI_TRANSITIONS=328} [2025-03-17 14:26:15,777 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 277 predicate places. [2025-03-17 14:26:15,777 INFO L471 AbstractCegarLoop]: Abstraction has has 299 places, 328 transitions, 4475 flow [2025-03-17 14:26:15,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:26:15,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:15,778 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:26:15,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-17 14:26:15,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-17 14:26:15,978 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:26:15,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash 444245211, now seen corresponding path program 5 times [2025-03-17 14:26:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:15,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893672470] [2025-03-17 14:26:15,979 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:26:15,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:15,981 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-17 14:26:15,986 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:26:15,986 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:26:15,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:16,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:16,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893672470] [2025-03-17 14:26:16,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893672470] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:26:16,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710243500] [2025-03-17 14:26:16,067 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:26:16,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:16,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:26:16,069 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:26:16,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-17 14:26:16,092 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-17 14:26:16,112 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:26:16,112 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:26:16,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:16,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 14:26:16,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:26:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:16,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:26:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:16,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710243500] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:26:16,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:26:16,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 21 [2025-03-17 14:26:16,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151406047] [2025-03-17 14:26:16,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:26:16,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:26:16,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:16,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:26:16,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:26:16,420 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:26:16,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 328 transitions, 4475 flow. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:26:16,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:16,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:26:16,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:17,305 INFO L124 PetriNetUnfolderBase]: 725/1354 cut-off events. [2025-03-17 14:26:17,305 INFO L125 PetriNetUnfolderBase]: For 25599/25599 co-relation queries the response was YES. [2025-03-17 14:26:17,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10673 conditions, 1354 events. 725/1354 cut-off events. For 25599/25599 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 7880 event pairs, 9 based on Foata normal form. 3/1339 useless extension candidates. Maximal degree in co-relation 10565. Up to 500 conditions per place. [2025-03-17 14:26:17,315 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 185 selfloop transitions, 243 changer transitions 12/441 dead transitions. [2025-03-17 14:26:17,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 441 transitions, 6736 flow [2025-03-17 14:26:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-17 14:26:17,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-03-17 14:26:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 255 transitions. [2025-03-17 14:26:17,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4396551724137931 [2025-03-17 14:26:17,316 INFO L175 Difference]: Start difference. First operand has 299 places, 328 transitions, 4475 flow. Second operand 29 states and 255 transitions. [2025-03-17 14:26:17,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 441 transitions, 6736 flow [2025-03-17 14:26:17,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 441 transitions, 6008 flow, removed 339 selfloop flow, removed 13 redundant places. [2025-03-17 14:26:17,425 INFO L231 Difference]: Finished difference. Result has 315 places, 370 transitions, 5502 flow [2025-03-17 14:26:17,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3849, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5502, PETRI_PLACES=315, PETRI_TRANSITIONS=370} [2025-03-17 14:26:17,426 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 293 predicate places. [2025-03-17 14:26:17,426 INFO L471 AbstractCegarLoop]: Abstraction has has 315 places, 370 transitions, 5502 flow [2025-03-17 14:26:17,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:26:17,426 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:17,426 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:26:17,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-17 14:26:17,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-17 14:26:17,627 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:26:17,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:17,627 INFO L85 PathProgramCache]: Analyzing trace with hash -642973383, now seen corresponding path program 6 times [2025-03-17 14:26:17,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:17,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753806863] [2025-03-17 14:26:17,627 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:26:17,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:17,629 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-03-17 14:26:17,633 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:26:17,633 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:26:17,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:17,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:17,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753806863] [2025-03-17 14:26:17,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753806863] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:26:17,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083687513] [2025-03-17 14:26:17,717 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:26:17,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:17,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:26:17,719 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:26:17,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-17 14:26:17,740 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-03-17 14:26:17,754 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:26:17,754 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 14:26:17,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:17,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:26:17,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:26:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:17,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:26:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:17,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083687513] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:26:17,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:26:17,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2025-03-17 14:26:17,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642853824] [2025-03-17 14:26:17,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:26:17,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 14:26:17,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:17,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 14:26:17,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:26:17,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:26:17,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 370 transitions, 5502 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:26:17,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:17,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:26:17,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:18,546 INFO L124 PetriNetUnfolderBase]: 752/1405 cut-off events. [2025-03-17 14:26:18,546 INFO L125 PetriNetUnfolderBase]: For 28362/28362 co-relation queries the response was YES. [2025-03-17 14:26:18,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11573 conditions, 1405 events. 752/1405 cut-off events. For 28362/28362 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 8255 event pairs, 31 based on Foata normal form. 3/1408 useless extension candidates. Maximal degree in co-relation 11405. Up to 1047 conditions per place. [2025-03-17 14:26:18,558 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 327 selfloop transitions, 85 changer transitions 8/421 dead transitions. [2025-03-17 14:26:18,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 421 transitions, 7129 flow [2025-03-17 14:26:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:26:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 14:26:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 139 transitions. [2025-03-17 14:26:18,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2025-03-17 14:26:18,559 INFO L175 Difference]: Start difference. First operand has 315 places, 370 transitions, 5502 flow. Second operand 15 states and 139 transitions. [2025-03-17 14:26:18,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 421 transitions, 7129 flow [2025-03-17 14:26:18,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 421 transitions, 6627 flow, removed 171 selfloop flow, removed 22 redundant places. [2025-03-17 14:26:18,706 INFO L231 Difference]: Finished difference. Result has 309 places, 381 transitions, 5668 flow [2025-03-17 14:26:18,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5078, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5668, PETRI_PLACES=309, PETRI_TRANSITIONS=381} [2025-03-17 14:26:18,707 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 287 predicate places. [2025-03-17 14:26:18,707 INFO L471 AbstractCegarLoop]: Abstraction has has 309 places, 381 transitions, 5668 flow [2025-03-17 14:26:18,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:26:18,707 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:18,707 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:26:18,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-17 14:26:18,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-17 14:26:18,908 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:26:18,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:18,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2009892827, now seen corresponding path program 7 times [2025-03-17 14:26:18,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:18,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530184698] [2025-03-17 14:26:18,908 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:26:18,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:18,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:26:18,913 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:26:18,913 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:18,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:18,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:18,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530184698] [2025-03-17 14:26:18,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530184698] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:26:18,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14832882] [2025-03-17 14:26:18,988 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:26:18,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:18,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:26:18,990 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:26:18,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-17 14:26:19,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:26:19,024 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:26:19,024 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:19,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:19,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:26:19,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:26:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:19,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:26:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:19,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14832882] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:26:19,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:26:19,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2025-03-17 14:26:19,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173754958] [2025-03-17 14:26:19,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:26:19,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:26:19,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:19,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:26:19,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:26:19,223 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 20 [2025-03-17 14:26:19,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 381 transitions, 5668 flow. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:26:19,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:19,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 20 [2025-03-17 14:26:19,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:20,192 INFO L124 PetriNetUnfolderBase]: 762/1453 cut-off events. [2025-03-17 14:26:20,192 INFO L125 PetriNetUnfolderBase]: For 28162/28162 co-relation queries the response was YES. [2025-03-17 14:26:20,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11757 conditions, 1453 events. 762/1453 cut-off events. For 28162/28162 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8758 event pairs, 36 based on Foata normal form. 5/1458 useless extension candidates. Maximal degree in co-relation 11590. Up to 1214 conditions per place. [2025-03-17 14:26:20,206 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 337 selfloop transitions, 67 changer transitions 24/429 dead transitions. [2025-03-17 14:26:20,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 429 transitions, 7074 flow [2025-03-17 14:26:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 14:26:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-17 14:26:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 152 transitions. [2025-03-17 14:26:20,207 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2025-03-17 14:26:20,207 INFO L175 Difference]: Start difference. First operand has 309 places, 381 transitions, 5668 flow. Second operand 17 states and 152 transitions. [2025-03-17 14:26:20,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 429 transitions, 7074 flow [2025-03-17 14:26:20,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 429 transitions, 6849 flow, removed 87 selfloop flow, removed 8 redundant places. [2025-03-17 14:26:20,374 INFO L231 Difference]: Finished difference. Result has 321 places, 381 transitions, 5706 flow [2025-03-17 14:26:20,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5443, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5706, PETRI_PLACES=321, PETRI_TRANSITIONS=381} [2025-03-17 14:26:20,375 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 299 predicate places. [2025-03-17 14:26:20,375 INFO L471 AbstractCegarLoop]: Abstraction has has 321 places, 381 transitions, 5706 flow [2025-03-17 14:26:20,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:26:20,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:20,375 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:26:20,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-17 14:26:20,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:20,576 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 14:26:20,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash 314956955, now seen corresponding path program 20 times [2025-03-17 14:26:20,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:20,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474798967] [2025-03-17 14:26:20,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:26:20,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:20,579 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-17 14:26:20,584 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:26:20,584 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:26:20,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:20,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:20,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474798967] [2025-03-17 14:26:20,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474798967] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:26:20,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700435330] [2025-03-17 14:26:20,852 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:26:20,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:20,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:26:20,855 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:26:20,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-17 14:26:20,879 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-17 14:26:20,928 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:26:20,928 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:26:20,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:20,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 14:26:20,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:26:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:26:21,096 INFO L312 TraceCheckSpWp]: Computing backward predicates...