./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:16:42,339 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:16:42,395 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:16:42,398 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:16:42,398 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:16:42,425 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:16:42,425 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:16:42,425 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:16:42,426 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:16:42,426 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:16:42,426 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:16:42,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:16:42,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:16:42,426 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:16:42,426 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:16:42,426 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:16:42,426 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:16:42,426 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:16:42,426 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:16:42,426 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:16:42,428 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:16:42,428 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:16:42,428 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:16:42,429 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:16:42,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:16:42,429 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:16:42,429 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 -> 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a [2025-03-17 14:16:42,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:16:42,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:16:42,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:16:42,648 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:16:42,648 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:16:42,650 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2025-03-17 14:16:43,780 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da16f3d39/37ff7950024a40b38811da1bbddbdd10/FLAG3d9219f95 [2025-03-17 14:16:44,051 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:16:44,052 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2025-03-17 14:16:44,062 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da16f3d39/37ff7950024a40b38811da1bbddbdd10/FLAG3d9219f95 [2025-03-17 14:16:44,349 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da16f3d39/37ff7950024a40b38811da1bbddbdd10 [2025-03-17 14:16:44,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:16:44,352 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:16:44,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:16:44,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:16:44,355 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:16:44,356 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a1c9666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44, skipping insertion in model container [2025-03-17 14:16:44,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,380 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:16:44,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:16:44,634 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:16:44,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:16:44,704 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:16:44,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44 WrapperNode [2025-03-17 14:16:44,705 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:16:44,706 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:16:44,706 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:16:44,706 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:16:44,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,741 INFO L138 Inliner]: procedures = 263, calls = 74, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 134 [2025-03-17 14:16:44,741 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:16:44,742 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:16:44,742 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:16:44,742 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:16:44,750 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,755 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,770 INFO L175 MemorySlicer]: Split 66 memory accesses to 1 slices as follows [66]. 100 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [60]. The 3 writes are split as follows [3]. [2025-03-17 14:16:44,771 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,771 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,776 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:16:44,788 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:16:44,788 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:16:44,788 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:16:44,788 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (1/1) ... [2025-03-17 14:16:44,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:16:44,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:16:44,817 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 14:16:44,820 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 14:16:44,837 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-17 14:16:44,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:16:44,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:16:44,837 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-17 14:16:44,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:16:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-03-17 14:16:44,838 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-03-17 14:16:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:16:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:16:44,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:16:44,839 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 14:16:44,936 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:16:44,937 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:16:45,172 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:16:45,173 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:16:45,369 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:16:45,370 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:16:45,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:16:45 BoogieIcfgContainer [2025-03-17 14:16:45,370 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:16:45,372 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:16:45,372 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:16:45,375 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:16:45,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:16:44" (1/3) ... [2025-03-17 14:16:45,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddd6678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:16:45, skipping insertion in model container [2025-03-17 14:16:45,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:16:44" (2/3) ... [2025-03-17 14:16:45,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddd6678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:16:45, skipping insertion in model container [2025-03-17 14:16:45,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:16:45" (3/3) ... [2025-03-17 14:16:45,378 INFO L128 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2025-03-17 14:16:45,391 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:16:45,392 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 06-symbeq_05-funloop_hard2.i that has 2 procedures, 41 locations, 1 initial locations, 3 loop locations, and 13 error locations. [2025-03-17 14:16:45,393 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:16:45,425 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 14:16:45,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 90 flow [2025-03-17 14:16:45,474 INFO L124 PetriNetUnfolderBase]: 3/42 cut-off events. [2025-03-17 14:16:45,475 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:16:45,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 42 events. 3/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 124 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2025-03-17 14:16:45,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 90 flow [2025-03-17 14:16:45,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 42 transitions, 87 flow [2025-03-17 14:16:45,490 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:16:45,500 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;@446f7fe0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:16:45,500 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-03-17 14:16:45,504 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:16:45,505 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2025-03-17 14:16:45,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:16:45,505 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:45,505 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:16:45,505 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:45,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:45,509 INFO L85 PathProgramCache]: Analyzing trace with hash 348000598, now seen corresponding path program 1 times [2025-03-17 14:16:45,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:45,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40323501] [2025-03-17 14:16:45,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:45,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:45,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:16:45,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:16:45,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:45,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:45,734 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 14:16:45,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:45,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40323501] [2025-03-17 14:16:45,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40323501] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:16:45,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:16:45,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:16:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134545035] [2025-03-17 14:16:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:16:45,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:16:45,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:45,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:16:45,762 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:16:45,763 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-17 14:16:45,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 14:16:45,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:45,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-17 14:16:45,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:45,882 INFO L124 PetriNetUnfolderBase]: 106/288 cut-off events. [2025-03-17 14:16:45,883 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:16:45,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 288 events. 106/288 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1436 event pairs, 84 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 491. Up to 213 conditions per place. [2025-03-17 14:16:45,887 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 24 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2025-03-17 14:16:45,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 141 flow [2025-03-17 14:16:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:16:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:16:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2025-03-17 14:16:45,897 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2025-03-17 14:16:45,898 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 87 flow. Second operand 3 states and 81 transitions. [2025-03-17 14:16:45,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 141 flow [2025-03-17 14:16:45,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:16:45,905 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 98 flow [2025-03-17 14:16:45,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2025-03-17 14:16:45,908 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2025-03-17 14:16:45,910 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 98 flow [2025-03-17 14:16:45,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 14:16:45,911 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:45,911 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:16:45,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:16:45,911 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:45,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1123480971, now seen corresponding path program 1 times [2025-03-17 14:16:45,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:45,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518756725] [2025-03-17 14:16:45,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:45,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:45,932 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:16:45,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:16:45,943 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:45,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:46,014 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 14:16:46,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:46,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518756725] [2025-03-17 14:16:46,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518756725] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:16:46,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052482694] [2025-03-17 14:16:46,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:46,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:16:46,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:16:46,016 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 14:16:46,018 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 14:16:46,071 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:16:46,097 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:16:46,097 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:46,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:46,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-17 14:16:46,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:16:46,129 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 14:16:46,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:16:46,144 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 14:16:46,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052482694] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:16:46,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:16:46,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-03-17 14:16:46,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329874824] [2025-03-17 14:16:46,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:16:46,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:16:46,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:46,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:16:46,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:16:46,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-17 14:16:46,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 98 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 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 14:16:46,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:46,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-17 14:16:46,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:46,250 INFO L124 PetriNetUnfolderBase]: 106/291 cut-off events. [2025-03-17 14:16:46,250 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:16:46,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 291 events. 106/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1430 event pairs, 84 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 510. Up to 213 conditions per place. [2025-03-17 14:16:46,254 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 24 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2025-03-17 14:16:46,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 168 flow [2025-03-17 14:16:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:16:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:16:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2025-03-17 14:16:46,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2025-03-17 14:16:46,257 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 98 flow. Second operand 6 states and 140 transitions. [2025-03-17 14:16:46,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 168 flow [2025-03-17 14:16:46,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 14:16:46,258 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 130 flow [2025-03-17 14:16:46,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2025-03-17 14:16:46,260 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2025-03-17 14:16:46,260 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 130 flow [2025-03-17 14:16:46,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 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 14:16:46,261 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:46,261 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:16:46,268 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 14:16:46,465 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 14:16:46,465 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:46,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1467715123, now seen corresponding path program 2 times [2025-03-17 14:16:46,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:46,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709636738] [2025-03-17 14:16:46,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:16:46,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:46,478 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-17 14:16:46,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 12 statements. [2025-03-17 14:16:46,490 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:16:46,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:16:46,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:46,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709636738] [2025-03-17 14:16:46,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709636738] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:16:46,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:16:46,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:16:46,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438433731] [2025-03-17 14:16:46,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:16:46,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:16:46,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:46,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:16:46,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:16:46,623 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-03-17 14:16:46,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 14:16:46,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:46,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-03-17 14:16:46,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:46,712 INFO L124 PetriNetUnfolderBase]: 106/281 cut-off events. [2025-03-17 14:16:46,712 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:16:46,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 281 events. 106/281 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1353 event pairs, 24 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 491. Up to 130 conditions per place. [2025-03-17 14:16:46,713 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 39 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2025-03-17 14:16:46,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 232 flow [2025-03-17 14:16:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:16:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:16:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2025-03-17 14:16:46,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2025-03-17 14:16:46,715 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 130 flow. Second operand 4 states and 100 transitions. [2025-03-17 14:16:46,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 232 flow [2025-03-17 14:16:46,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 218 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-17 14:16:46,716 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 114 flow [2025-03-17 14:16:46,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2025-03-17 14:16:46,717 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2025-03-17 14:16:46,717 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 114 flow [2025-03-17 14:16:46,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 14:16:46,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:46,717 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:16:46,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:16:46,717 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:46,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:46,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1467715122, now seen corresponding path program 1 times [2025-03-17 14:16:46,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:46,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516401830] [2025-03-17 14:16:46,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:46,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:46,724 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:16:46,730 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:16:46,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:46,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:16:46,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:46,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516401830] [2025-03-17 14:16:46,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516401830] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:16:46,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428158594] [2025-03-17 14:16:46,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:46,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:16:46,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:16:46,800 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 14:16:46,801 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 14:16:46,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:16:46,859 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:16:46,859 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:46,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:46,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:16:46,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:16:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:16:46,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:16:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:16:46,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428158594] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:16:46,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:16:46,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-17 14:16:46,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554227664] [2025-03-17 14:16:46,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:16:46,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:16:46,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:46,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:16:46,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:16:46,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-17 14:16:46,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 114 flow. Second operand has 13 states, 13 states have (on average 19.384615384615383) internal successors, (252), 13 states have internal predecessors, (252), 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 14:16:46,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:46,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-17 14:16:46,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:47,025 INFO L124 PetriNetUnfolderBase]: 106/283 cut-off events. [2025-03-17 14:16:47,026 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2025-03-17 14:16:47,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 283 events. 106/283 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1276 event pairs, 84 based on Foata normal form. 6/272 useless extension candidates. Maximal degree in co-relation 513. Up to 213 conditions per place. [2025-03-17 14:16:47,027 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 24 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2025-03-17 14:16:47,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 48 transitions, 220 flow [2025-03-17 14:16:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:16:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 14:16:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2025-03-17 14:16:47,029 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49806201550387597 [2025-03-17 14:16:47,029 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 114 flow. Second operand 12 states and 257 transitions. [2025-03-17 14:16:47,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 48 transitions, 220 flow [2025-03-17 14:16:47,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:16:47,031 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 192 flow [2025-03-17 14:16:47,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=192, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2025-03-17 14:16:47,031 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2025-03-17 14:16:47,031 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 192 flow [2025-03-17 14:16:47,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.384615384615383) internal successors, (252), 13 states have internal predecessors, (252), 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 14:16:47,032 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:47,032 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:16:47,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 14:16:47,232 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,SelfDestructingSolverStorable3 [2025-03-17 14:16:47,233 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:47,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:47,233 INFO L85 PathProgramCache]: Analyzing trace with hash -363188018, now seen corresponding path program 2 times [2025-03-17 14:16:47,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:47,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479252873] [2025-03-17 14:16:47,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:16:47,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:47,246 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 14:16:47,254 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 18 statements. [2025-03-17 14:16:47,254 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:16:47,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:47,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479252873] [2025-03-17 14:16:47,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479252873] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:16:47,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:16:47,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:16:47,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937553418] [2025-03-17 14:16:47,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:16:47,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:16:47,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:47,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:16:47,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:16:47,458 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-03-17 14:16:47,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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 14:16:47,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:47,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-03-17 14:16:47,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:47,617 INFO L124 PetriNetUnfolderBase]: 210/473 cut-off events. [2025-03-17 14:16:47,617 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2025-03-17 14:16:47,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 473 events. 210/473 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2076 event pairs, 103 based on Foata normal form. 0/430 useless extension candidates. Maximal degree in co-relation 891. Up to 274 conditions per place. [2025-03-17 14:16:47,623 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 65 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2025-03-17 14:16:47,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 390 flow [2025-03-17 14:16:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:16:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:16:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2025-03-17 14:16:47,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.641860465116279 [2025-03-17 14:16:47,625 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 192 flow. Second operand 5 states and 138 transitions. [2025-03-17 14:16:47,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 390 flow [2025-03-17 14:16:47,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 342 flow, removed 19 selfloop flow, removed 5 redundant places. [2025-03-17 14:16:47,630 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 166 flow [2025-03-17 14:16:47,630 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2025-03-17 14:16:47,631 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2025-03-17 14:16:47,631 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 166 flow [2025-03-17 14:16:47,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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 14:16:47,631 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:47,631 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:16:47,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:16:47,631 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:47,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -388767493, now seen corresponding path program 1 times [2025-03-17 14:16:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:47,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699138486] [2025-03-17 14:16:47,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:47,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:47,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:16:47,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:16:47,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:47,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:47,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:47,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699138486] [2025-03-17 14:16:47,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699138486] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:16:47,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:16:47,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:16:47,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792600680] [2025-03-17 14:16:47,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:16:47,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:16:47,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:47,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:16:47,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:16:47,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-03-17 14:16:47,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 14:16:47,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:47,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-03-17 14:16:47,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:47,868 INFO L124 PetriNetUnfolderBase]: 184/457 cut-off events. [2025-03-17 14:16:47,868 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2025-03-17 14:16:47,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 995 conditions, 457 events. 184/457 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2177 event pairs, 91 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 941. Up to 238 conditions per place. [2025-03-17 14:16:47,871 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 44 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2025-03-17 14:16:47,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 292 flow [2025-03-17 14:16:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:16:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:16:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2025-03-17 14:16:47,873 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5290697674418605 [2025-03-17 14:16:47,873 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 166 flow. Second operand 4 states and 91 transitions. [2025-03-17 14:16:47,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 292 flow [2025-03-17 14:16:47,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 56 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:16:47,878 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 164 flow [2025-03-17 14:16:47,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2025-03-17 14:16:47,879 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2025-03-17 14:16:47,880 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 164 flow [2025-03-17 14:16:47,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 14:16:47,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:47,880 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:16:47,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:16:47,880 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:47,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash -388767492, now seen corresponding path program 1 times [2025-03-17 14:16:47,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:47,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129593831] [2025-03-17 14:16:47,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:47,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:47,890 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:16:47,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:16:47,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:47,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:48,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:48,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129593831] [2025-03-17 14:16:48,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129593831] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:16:48,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:16:48,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:16:48,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145067240] [2025-03-17 14:16:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:16:48,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:16:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:48,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:16:48,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:16:48,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-03-17 14:16:48,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 14:16:48,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:48,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-03-17 14:16:48,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:48,309 INFO L124 PetriNetUnfolderBase]: 310/694 cut-off events. [2025-03-17 14:16:48,309 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2025-03-17 14:16:48,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 694 events. 310/694 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3185 event pairs, 172 based on Foata normal form. 14/658 useless extension candidates. Maximal degree in co-relation 1526. Up to 462 conditions per place. [2025-03-17 14:16:48,314 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 62 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2025-03-17 14:16:48,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 380 flow [2025-03-17 14:16:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:16:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:16:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2025-03-17 14:16:48,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5488372093023256 [2025-03-17 14:16:48,315 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 164 flow. Second operand 5 states and 118 transitions. [2025-03-17 14:16:48,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 380 flow [2025-03-17 14:16:48,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 370 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:16:48,319 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 184 flow [2025-03-17 14:16:48,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2025-03-17 14:16:48,319 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2025-03-17 14:16:48,319 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 184 flow [2025-03-17 14:16:48,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 14:16:48,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:48,320 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:16:48,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:16:48,320 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:48,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:48,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1235471854, now seen corresponding path program 1 times [2025-03-17 14:16:48,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:48,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973044383] [2025-03-17 14:16:48,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:48,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:48,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 14:16:48,340 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:16:48,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:48,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:48,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:48,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973044383] [2025-03-17 14:16:48,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973044383] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:16:48,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895486768] [2025-03-17 14:16:48,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:48,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:16:48,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:16:48,521 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 14:16:48,523 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 14:16:48,566 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 14:16:48,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:16:48,594 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:48,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:48,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:16:48,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:16:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:48,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:16:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:48,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895486768] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:16:48,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:16:48,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-03-17 14:16:48,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118661786] [2025-03-17 14:16:48,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:16:48,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:16:48,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:48,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:16:48,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:16:49,051 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-03-17 14:16:49,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 184 flow. Second operand has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 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 14:16:49,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:49,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-03-17 14:16:49,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:49,569 INFO L124 PetriNetUnfolderBase]: 629/1380 cut-off events. [2025-03-17 14:16:49,569 INFO L125 PetriNetUnfolderBase]: For 478/507 co-relation queries the response was YES. [2025-03-17 14:16:49,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3196 conditions, 1380 events. 629/1380 cut-off events. For 478/507 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6753 event pairs, 72 based on Foata normal form. 133/1494 useless extension candidates. Maximal degree in co-relation 3140. Up to 242 conditions per place. [2025-03-17 14:16:49,577 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 185 selfloop transitions, 12 changer transitions 0/204 dead transitions. [2025-03-17 14:16:49,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 204 transitions, 1026 flow [2025-03-17 14:16:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:16:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 14:16:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 345 transitions. [2025-03-17 14:16:49,579 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6686046511627907 [2025-03-17 14:16:49,579 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 184 flow. Second operand 12 states and 345 transitions. [2025-03-17 14:16:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 204 transitions, 1026 flow [2025-03-17 14:16:49,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 204 transitions, 1004 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:16:49,583 INFO L231 Difference]: Finished difference. Result has 80 places, 54 transitions, 259 flow [2025-03-17 14:16:49,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=80, PETRI_TRANSITIONS=54} [2025-03-17 14:16:49,583 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2025-03-17 14:16:49,583 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 54 transitions, 259 flow [2025-03-17 14:16:49,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 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 14:16:49,584 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:49,584 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:16:49,590 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 14:16:49,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:16:49,784 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:49,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2071729897, now seen corresponding path program 1 times [2025-03-17 14:16:49,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:49,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420850802] [2025-03-17 14:16:49,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:49,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:49,792 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 14:16:49,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:16:49,798 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:49,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:49,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:49,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420850802] [2025-03-17 14:16:49,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420850802] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:16:49,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546495553] [2025-03-17 14:16:49,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:49,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:16:49,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:16:49,946 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 14:16:49,947 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 14:16:49,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 14:16:50,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 14:16:50,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:50,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:50,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:16:50,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:16:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:50,148 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:16:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:50,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546495553] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:16:50,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:16:50,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-03-17 14:16:50,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075652787] [2025-03-17 14:16:50,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:16:50,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:16:50,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:50,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:16:50,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:16:50,369 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-03-17 14:16:50,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 54 transitions, 259 flow. Second operand has 14 states, 14 states have (on average 16.0) internal successors, (224), 14 states have internal predecessors, (224), 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 14:16:50,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:50,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-03-17 14:16:50,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:50,943 INFO L124 PetriNetUnfolderBase]: 1250/2746 cut-off events. [2025-03-17 14:16:50,943 INFO L125 PetriNetUnfolderBase]: For 3118/3118 co-relation queries the response was YES. [2025-03-17 14:16:50,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7323 conditions, 2746 events. 1250/2746 cut-off events. For 3118/3118 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 14939 event pairs, 306 based on Foata normal form. 224/2938 useless extension candidates. Maximal degree in co-relation 7260. Up to 782 conditions per place. [2025-03-17 14:16:50,956 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 211 selfloop transitions, 12 changer transitions 0/228 dead transitions. [2025-03-17 14:16:50,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 228 transitions, 1729 flow [2025-03-17 14:16:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:16:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 14:16:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2025-03-17 14:16:50,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.560077519379845 [2025-03-17 14:16:50,957 INFO L175 Difference]: Start difference. First operand has 80 places, 54 transitions, 259 flow. Second operand 12 states and 289 transitions. [2025-03-17 14:16:50,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 228 transitions, 1729 flow [2025-03-17 14:16:50,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 228 transitions, 1548 flow, removed 70 selfloop flow, removed 3 redundant places. [2025-03-17 14:16:50,962 INFO L231 Difference]: Finished difference. Result has 94 places, 60 transitions, 319 flow [2025-03-17 14:16:50,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=319, PETRI_PLACES=94, PETRI_TRANSITIONS=60} [2025-03-17 14:16:50,963 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2025-03-17 14:16:50,963 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 60 transitions, 319 flow [2025-03-17 14:16:50,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.0) internal successors, (224), 14 states have internal predecessors, (224), 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 14:16:50,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:50,963 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-17 14:16:50,988 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 14:16:51,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:16:51,167 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:51,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash 780609742, now seen corresponding path program 2 times [2025-03-17 14:16:51,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:51,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434301730] [2025-03-17 14:16:51,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:16:51,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:51,179 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-17 14:16:51,201 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-17 14:16:51,202 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:16:51,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:51,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:51,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434301730] [2025-03-17 14:16:51,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434301730] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:16:51,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529813256] [2025-03-17 14:16:51,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:16:51,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:16:51,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:16:51,493 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 14:16:51,495 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 14:16:51,544 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-17 14:16:51,579 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-17 14:16:51,579 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:16:51,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:51,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 14:16:51,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:16:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:51,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:16:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:52,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529813256] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:16:52,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:16:52,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-03-17 14:16:52,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455884078] [2025-03-17 14:16:52,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:16:52,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 14:16:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:52,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 14:16:52,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-03-17 14:16:52,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-03-17 14:16:52,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 60 transitions, 319 flow. Second operand has 23 states, 23 states have (on average 18.17391304347826) internal successors, (418), 23 states have internal predecessors, (418), 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 14:16:52,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:52,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-03-17 14:16:52,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:53,872 INFO L124 PetriNetUnfolderBase]: 2333/5055 cut-off events. [2025-03-17 14:16:53,873 INFO L125 PetriNetUnfolderBase]: For 8796/8857 co-relation queries the response was YES. [2025-03-17 14:16:53,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14212 conditions, 5055 events. 2333/5055 cut-off events. For 8796/8857 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 29114 event pairs, 0 based on Foata normal form. 444/5499 useless extension candidates. Maximal degree in co-relation 14141. Up to 519 conditions per place. [2025-03-17 14:16:53,903 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 516 selfloop transitions, 23 changer transitions 22/567 dead transitions. [2025-03-17 14:16:53,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 567 transitions, 3893 flow [2025-03-17 14:16:53,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 14:16:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 14:16:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 701 transitions. [2025-03-17 14:16:53,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792635658914729 [2025-03-17 14:16:53,905 INFO L175 Difference]: Start difference. First operand has 94 places, 60 transitions, 319 flow. Second operand 24 states and 701 transitions. [2025-03-17 14:16:53,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 567 transitions, 3893 flow [2025-03-17 14:16:53,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 567 transitions, 3488 flow, removed 154 selfloop flow, removed 7 redundant places. [2025-03-17 14:16:53,921 INFO L231 Difference]: Finished difference. Result has 115 places, 69 transitions, 411 flow [2025-03-17 14:16:53,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=411, PETRI_PLACES=115, PETRI_TRANSITIONS=69} [2025-03-17 14:16:53,922 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2025-03-17 14:16:53,922 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 69 transitions, 411 flow [2025-03-17 14:16:53,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.17391304347826) internal successors, (418), 23 states have internal predecessors, (418), 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 14:16:53,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:53,923 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-17 14:16:53,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 14:16:54,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-17 14:16:54,127 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:54,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1356443716, now seen corresponding path program 2 times [2025-03-17 14:16:54,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:54,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798440789] [2025-03-17 14:16:54,128 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:16:54,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:54,138 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-17 14:16:54,156 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-17 14:16:54,156 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:16:54,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:54,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:54,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798440789] [2025-03-17 14:16:54,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798440789] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:16:54,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651931608] [2025-03-17 14:16:54,371 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:16:54,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:16:54,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:16:54,373 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 14:16:54,374 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 14:16:54,428 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-17 14:16:54,469 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-17 14:16:54,469 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:16:54,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:54,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:16:54,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:16:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:54,791 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:16:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 14:16:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651931608] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:16:55,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:16:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-03-17 14:16:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803811804] [2025-03-17 14:16:55,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:16:55,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 14:16:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:55,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 14:16:55,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2025-03-17 14:16:55,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-03-17 14:16:55,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 69 transitions, 411 flow. Second operand has 23 states, 23 states have (on average 17.17391304347826) internal successors, (395), 23 states have internal predecessors, (395), 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 14:16:55,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:55,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-03-17 14:16:55,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:56,488 INFO L124 PetriNetUnfolderBase]: 2711/5946 cut-off events. [2025-03-17 14:16:56,488 INFO L125 PetriNetUnfolderBase]: For 11939/11939 co-relation queries the response was YES. [2025-03-17 14:16:56,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17492 conditions, 5946 events. 2711/5946 cut-off events. For 11939/11939 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 35816 event pairs, 0 based on Foata normal form. 189/6135 useless extension candidates. Maximal degree in co-relation 17418. Up to 945 conditions per place. [2025-03-17 14:16:56,525 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 407 selfloop transitions, 14 changer transitions 0/425 dead transitions. [2025-03-17 14:16:56,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 425 transitions, 3833 flow [2025-03-17 14:16:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:16:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 14:16:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 349 transitions. [2025-03-17 14:16:56,526 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5410852713178295 [2025-03-17 14:16:56,526 INFO L175 Difference]: Start difference. First operand has 115 places, 69 transitions, 411 flow. Second operand 15 states and 349 transitions. [2025-03-17 14:16:56,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 425 transitions, 3833 flow [2025-03-17 14:16:56,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 425 transitions, 3264 flow, removed 169 selfloop flow, removed 14 redundant places. [2025-03-17 14:16:56,542 INFO L231 Difference]: Finished difference. Result has 114 places, 70 transitions, 391 flow [2025-03-17 14:16:56,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=391, PETRI_PLACES=114, PETRI_TRANSITIONS=70} [2025-03-17 14:16:56,543 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2025-03-17 14:16:56,543 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 70 transitions, 391 flow [2025-03-17 14:16:56,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.17391304347826) internal successors, (395), 23 states have internal predecessors, (395), 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 14:16:56,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:16:56,543 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:16:56,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:16:56,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:16:56,744 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:16:56,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:16:56,744 INFO L85 PathProgramCache]: Analyzing trace with hash 22216603, now seen corresponding path program 1 times [2025-03-17 14:16:56,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:16:56,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888132182] [2025-03-17 14:16:56,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:16:56,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:16:56,755 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-17 14:16:56,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-17 14:16:56,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:16:56,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:16:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-17 14:16:56,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:16:56,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888132182] [2025-03-17 14:16:56,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888132182] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:16:56,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:16:56,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:16:56,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816074784] [2025-03-17 14:16:56,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:16:56,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:16:56,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:16:56,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:16:56,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:16:56,803 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-17 14:16:56,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 70 transitions, 391 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 14:16:56,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:16:56,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-17 14:16:56,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:16:57,363 INFO L124 PetriNetUnfolderBase]: 2648/5773 cut-off events. [2025-03-17 14:16:57,363 INFO L125 PetriNetUnfolderBase]: For 8927/8957 co-relation queries the response was YES. [2025-03-17 14:16:57,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16758 conditions, 5773 events. 2648/5773 cut-off events. For 8927/8957 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 34878 event pairs, 2542 based on Foata normal form. 63/5833 useless extension candidates. Maximal degree in co-relation 16687. Up to 5306 conditions per place. [2025-03-17 14:16:57,382 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 0 selfloop transitions, 0 changer transitions 69/69 dead transitions. [2025-03-17 14:16:57,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 69 transitions, 519 flow [2025-03-17 14:16:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:16:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:16:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2025-03-17 14:16:57,383 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2025-03-17 14:16:57,383 INFO L175 Difference]: Start difference. First operand has 114 places, 70 transitions, 391 flow. Second operand 3 states and 76 transitions. [2025-03-17 14:16:57,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 69 transitions, 519 flow [2025-03-17 14:16:57,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 69 transitions, 494 flow, removed 3 selfloop flow, removed 10 redundant places. [2025-03-17 14:16:57,402 INFO L231 Difference]: Finished difference. Result has 105 places, 0 transitions, 0 flow [2025-03-17 14:16:57,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=105, PETRI_TRANSITIONS=0} [2025-03-17 14:16:57,403 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2025-03-17 14:16:57,403 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 0 transitions, 0 flow [2025-03-17 14:16:57,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 14:16:57,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 18 remaining) [2025-03-17 14:16:57,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-03-17 14:16:57,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-03-17 14:16:57,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-03-17 14:16:57,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-03-17 14:16:57,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-03-17 14:16:57,405 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-03-17 14:16:57,406 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-03-17 14:16:57,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 14:16:57,406 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1] [2025-03-17 14:16:57,410 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-17 14:16:57,410 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-17 14:16:57,414 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:16:57 BasicIcfg [2025-03-17 14:16:57,414 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-17 14:16:57,414 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-17 14:16:57,414 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-17 14:16:57,414 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-17 14:16:57,415 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:16:45" (3/4) ... [2025-03-17 14:16:57,416 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-17 14:16:57,418 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure t_fun [2025-03-17 14:16:57,421 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 49 nodes and edges [2025-03-17 14:16:57,422 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2025-03-17 14:16:57,422 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2025-03-17 14:16:57,422 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-17 14:16:57,422 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2025-03-17 14:16:57,422 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-17 14:16:57,483 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-17 14:16:57,483 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-17 14:16:57,483 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-17 14:16:57,484 INFO L158 Benchmark]: Toolchain (without parser) took 13131.93ms. Allocated memory was 142.6MB in the beginning and 604.0MB in the end (delta: 461.4MB). Free memory was 107.5MB in the beginning and 397.7MB in the end (delta: -290.2MB). Peak memory consumption was 170.8MB. Max. memory is 16.1GB. [2025-03-17 14:16:57,484 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 125.7MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 14:16:57,484 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.65ms. Allocated memory is still 142.6MB. Free memory was 107.5MB in the beginning and 78.4MB in the end (delta: 29.0MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-03-17 14:16:57,484 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.74ms. Allocated memory is still 142.6MB. Free memory was 78.4MB in the beginning and 76.3MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 14:16:57,485 INFO L158 Benchmark]: Boogie Preprocessor took 39.45ms. Allocated memory is still 142.6MB. Free memory was 76.3MB in the beginning and 74.3MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 14:16:57,485 INFO L158 Benchmark]: IcfgBuilder took 582.67ms. Allocated memory is still 142.6MB. Free memory was 73.3MB in the beginning and 64.4MB in the end (delta: 8.9MB). Peak memory consumption was 48.4MB. Max. memory is 16.1GB. [2025-03-17 14:16:57,485 INFO L158 Benchmark]: TraceAbstraction took 12041.95ms. Allocated memory was 142.6MB in the beginning and 604.0MB in the end (delta: 461.4MB). Free memory was 63.6MB in the beginning and 401.7MB in the end (delta: -338.0MB). Peak memory consumption was 265.0MB. Max. memory is 16.1GB. [2025-03-17 14:16:57,485 INFO L158 Benchmark]: Witness Printer took 69.04ms. Allocated memory is still 604.0MB. Free memory was 401.7MB in the beginning and 397.7MB in the end (delta: 4.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 14:16:57,486 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 125.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.65ms. Allocated memory is still 142.6MB. Free memory was 107.5MB in the beginning and 78.4MB in the end (delta: 29.0MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.74ms. Allocated memory is still 142.6MB. Free memory was 78.4MB in the beginning and 76.3MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.45ms. Allocated memory is still 142.6MB. Free memory was 76.3MB in the beginning and 74.3MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 582.67ms. Allocated memory is still 142.6MB. Free memory was 73.3MB in the beginning and 64.4MB in the end (delta: 8.9MB). Peak memory consumption was 48.4MB. Max. memory is 16.1GB. * TraceAbstraction took 12041.95ms. Allocated memory was 142.6MB in the beginning and 604.0MB in the end (delta: 461.4MB). Free memory was 63.6MB in the beginning and 401.7MB in the end (delta: -338.0MB). Peak memory consumption was 265.0MB. Max. memory is 16.1GB. * Witness Printer took 69.04ms. Allocated memory is still 604.0MB. Free memory was 401.7MB in the beginning and 397.7MB in the end (delta: 4.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 931]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 55 locations, 57 edges, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 12.0s, OverallIterations: 12, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2651 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2517 mSDsluCounter, 479 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 455 mSDsCounter, 63 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5977 IncrementalHoareTripleChecker+Invalid, 6040 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 63 mSolverCounterUnsat, 24 mSDtfsCounter, 5977 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 408 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=411occurred in iteration=10, InterpolantAutomatonStates: 105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 457 NumberOfCodeBlocks, 443 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 596 ConstructedInterpolants, 0 QuantifiedInterpolants, 7067 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1783 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 1074/1370 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-17 14:16:57,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE