./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/realloc1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed 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/memsafety-ext3/realloc1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac04f74b68086890b55eca7e645e90e8df8a67932fce57d15e9ba2378d355360 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:52:47,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:52:47,790 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-08 22:52:47,794 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:52:47,795 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:52:47,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:52:47,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:52:47,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:52:47,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 22:52:47,817 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 22:52:47,817 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:52:47,817 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:52:47,817 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:52:47,817 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:52:47,817 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:52:47,817 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:52:47,817 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:52:47,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:52:47,818 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:52:47,818 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:52:47,818 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:52:47,819 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 22:52:47,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 22:52:47,819 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:52:47,819 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:52:47,819 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:52:47,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:52:47,819 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 -> ac04f74b68086890b55eca7e645e90e8df8a67932fce57d15e9ba2378d355360 [2025-03-08 22:52:48,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:52:48,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:52:48,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:52:48,105 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:52:48,105 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:52:48,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/realloc1.c [2025-03-08 22:52:49,178 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c6c72af8/34f64fd9d2724cbdb1cbc7bd5b759eb7/FLAG6acdb9402 [2025-03-08 22:52:49,437 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:52:49,437 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/realloc1.c [2025-03-08 22:52:49,469 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c6c72af8/34f64fd9d2724cbdb1cbc7bd5b759eb7/FLAG6acdb9402 [2025-03-08 22:52:49,485 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c6c72af8/34f64fd9d2724cbdb1cbc7bd5b759eb7 [2025-03-08 22:52:49,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:52:49,489 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:52:49,490 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:52:49,490 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:52:49,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:52:49,493 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fb37c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49, skipping insertion in model container [2025-03-08 22:52:49,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,503 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:52:49,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:52:49,606 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 22:52:49,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:52:49,626 INFO L204 MainTranslator]: Completed translation [2025-03-08 22:52:49,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49 WrapperNode [2025-03-08 22:52:49,627 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:52:49,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 22:52:49,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 22:52:49,628 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 22:52:49,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,637 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,649 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2025-03-08 22:52:49,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 22:52:49,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 22:52:49,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 22:52:49,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 22:52:49,655 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,657 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,665 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Memory array in LHS [2025-03-08 22:52:49,665 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,671 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,676 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 22:52:49,680 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 22:52:49,680 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 22:52:49,680 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 22:52:49,681 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (1/1) ... [2025-03-08 22:52:49,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:52:49,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:52:49,710 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) [2025-03-08 22:52:49,712 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 [2025-03-08 22:52:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2025-03-08 22:52:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 22:52:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 22:52:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 22:52:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2025-03-08 22:52:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 22:52:49,768 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 22:52:49,770 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 22:52:49,876 INFO L? ?]: Removed 29 outVars from TransFormulas that were not future-live. [2025-03-08 22:52:49,876 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 22:52:49,885 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 22:52:49,885 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 22:52:49,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:52:49 BoogieIcfgContainer [2025-03-08 22:52:49,885 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 22:52:49,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 22:52:49,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 22:52:49,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 22:52:49,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 10:52:49" (1/3) ... [2025-03-08 22:52:49,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e324218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:52:49, skipping insertion in model container [2025-03-08 22:52:49,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:52:49" (2/3) ... [2025-03-08 22:52:49,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e324218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:52:49, skipping insertion in model container [2025-03-08 22:52:49,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:52:49" (3/3) ... [2025-03-08 22:52:49,891 INFO L128 eAbstractionObserver]: Analyzing ICFG realloc1.c [2025-03-08 22:52:49,903 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 22:52:49,904 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG realloc1.c that has 1 procedures, 24 locations, 1 initial locations, 1 loop locations, and 8 error locations. [2025-03-08 22:52:49,933 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 22:52:49,943 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;@3b8e024e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 22:52:49,943 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-08 22:52:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 23 states have internal predecessors, (26), 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) [2025-03-08 22:52:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-03-08 22:52:49,951 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:52:49,952 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-03-08 22:52:49,952 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-08 22:52:49,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:52:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1784287, now seen corresponding path program 1 times [2025-03-08 22:52:49,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:52:49,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178350603] [2025-03-08 22:52:49,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:52:49,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:52:50,003 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-08 22:52:50,014 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-08 22:52:50,014 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:52:50,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:50,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:52:50,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178350603] [2025-03-08 22:52:50,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178350603] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:52:50,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:52:50,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:52:50,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304394571] [2025-03-08 22:52:50,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:52:50,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:52:50,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:52:50,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:52:50,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:52:50,098 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 23 states have internal predecessors, (26), 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2025-03-08 22:52:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:52:50,119 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2025-03-08 22:52:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:52:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) Word has length 4 [2025-03-08 22:52:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:52:50,124 INFO L225 Difference]: With dead ends: 28 [2025-03-08 22:52:50,124 INFO L226 Difference]: Without dead ends: 26 [2025-03-08 22:52:50,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:52:50,126 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:52:50,128 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 41 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:52:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-08 22:52:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2025-03-08 22:52:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 22 states have internal predecessors, (25), 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) [2025-03-08 22:52:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2025-03-08 22:52:50,148 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 4 [2025-03-08 22:52:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:52:50,148 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2025-03-08 22:52:50,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2025-03-08 22:52:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2025-03-08 22:52:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-03-08 22:52:50,149 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:52:50,149 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-03-08 22:52:50,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 22:52:50,149 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-08 22:52:50,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:52:50,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1784446, now seen corresponding path program 1 times [2025-03-08 22:52:50,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:52:50,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014516034] [2025-03-08 22:52:50,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:52:50,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:52:50,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-08 22:52:50,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-08 22:52:50,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:52:50,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:50,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:52:50,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014516034] [2025-03-08 22:52:50,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014516034] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:52:50,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:52:50,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:52:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284952946] [2025-03-08 22:52:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:52:50,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:52:50,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:52:50,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:52:50,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:52:50,198 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2025-03-08 22:52:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:52:50,228 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2025-03-08 22:52:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:52:50,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) Word has length 4 [2025-03-08 22:52:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:52:50,229 INFO L225 Difference]: With dead ends: 24 [2025-03-08 22:52:50,229 INFO L226 Difference]: Without dead ends: 24 [2025-03-08 22:52:50,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:52:50,230 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:52:50,230 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:52:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-08 22:52:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2025-03-08 22:52:50,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 20 states have internal predecessors, (23), 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) [2025-03-08 22:52:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2025-03-08 22:52:50,232 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 4 [2025-03-08 22:52:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:52:50,232 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2025-03-08 22:52:50,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2025-03-08 22:52:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2025-03-08 22:52:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-03-08 22:52:50,233 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:52:50,233 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-03-08 22:52:50,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 22:52:50,233 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-08 22:52:50,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:52:50,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1784447, now seen corresponding path program 1 times [2025-03-08 22:52:50,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:52:50,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100194965] [2025-03-08 22:52:50,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:52:50,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:52:50,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-08 22:52:50,240 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-08 22:52:50,240 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:52:50,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:50,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:52:50,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100194965] [2025-03-08 22:52:50,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100194965] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:52:50,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:52:50,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:52:50,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391818803] [2025-03-08 22:52:50,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:52:50,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:52:50,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:52:50,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:52:50,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:52:50,303 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2025-03-08 22:52:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:52:50,334 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2025-03-08 22:52:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:52:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) Word has length 4 [2025-03-08 22:52:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:52:50,335 INFO L225 Difference]: With dead ends: 23 [2025-03-08 22:52:50,335 INFO L226 Difference]: Without dead ends: 23 [2025-03-08 22:52:50,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:52:50,336 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:52:50,336 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:52:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-08 22:52:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2025-03-08 22:52:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:52:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2025-03-08 22:52:50,338 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2025-03-08 22:52:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:52:50,338 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2025-03-08 22:52:50,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2025-03-08 22:52:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2025-03-08 22:52:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 22:52:50,338 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:52:50,338 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:52:50,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 22:52:50,340 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-08 22:52:50,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:52:50,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1620815256, now seen corresponding path program 1 times [2025-03-08 22:52:50,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:52:50,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982428971] [2025-03-08 22:52:50,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:52:50,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:52:50,347 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 22:52:50,350 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 22:52:50,350 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:52:50,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 22:52:50,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:52:50,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982428971] [2025-03-08 22:52:50,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982428971] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:52:50,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:52:50,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:52:50,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201217938] [2025-03-08 22:52:50,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:52:50,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:52:50,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:52:50,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:52:50,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:52:50,363 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2025-03-08 22:52:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:52:50,373 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2025-03-08 22:52:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:52:50,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) Word has length 7 [2025-03-08 22:52:50,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:52:50,374 INFO L225 Difference]: With dead ends: 24 [2025-03-08 22:52:50,374 INFO L226 Difference]: Without dead ends: 24 [2025-03-08 22:52:50,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:52:50,375 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:52:50,375 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:52:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-08 22:52:50,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2025-03-08 22:52:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 20 states have internal predecessors, (23), 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) [2025-03-08 22:52:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2025-03-08 22:52:50,380 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2025-03-08 22:52:50,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:52:50,380 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2025-03-08 22:52:50,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2025-03-08 22:52:50,381 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2025-03-08 22:52:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 22:52:50,381 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:52:50,381 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-08 22:52:50,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 22:52:50,381 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-08 22:52:50,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:52:50,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1620815416, now seen corresponding path program 1 times [2025-03-08 22:52:50,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:52:50,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812447900] [2025-03-08 22:52:50,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:52:50,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:52:50,389 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 22:52:50,396 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 22:52:50,396 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:52:50,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:50,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:52:50,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812447900] [2025-03-08 22:52:50,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812447900] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:52:50,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937308682] [2025-03-08 22:52:50,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:52:50,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:52:50,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:52:50,497 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) [2025-03-08 22:52:50,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 22:52:50,527 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 22:52:50,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 22:52:50,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:52:50,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:50,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 22:52:50,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:52:50,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-08 22:52:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:50,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:52:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:50,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937308682] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:52:50,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 22:52:50,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-03-08 22:52:50,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21546141] [2025-03-08 22:52:50,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 22:52:50,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:52:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:52:50,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:52:50,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:52:50,697 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) [2025-03-08 22:52:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:52:50,782 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2025-03-08 22:52:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:52:50,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) Word has length 7 [2025-03-08 22:52:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:52:50,783 INFO L225 Difference]: With dead ends: 30 [2025-03-08 22:52:50,783 INFO L226 Difference]: Without dead ends: 30 [2025-03-08 22:52:50,783 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:52:50,783 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:52:50,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:52:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-08 22:52:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-08 22:52:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.36) internal successors, (34), 29 states have internal predecessors, (34), 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) [2025-03-08 22:52:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2025-03-08 22:52:50,787 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 7 [2025-03-08 22:52:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:52:50,787 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2025-03-08 22:52:50,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) [2025-03-08 22:52:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2025-03-08 22:52:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 22:52:50,787 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:52:50,787 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2025-03-08 22:52:50,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 22:52:50,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:52:50,988 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-08 22:52:50,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:52:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash 840430740, now seen corresponding path program 1 times [2025-03-08 22:52:50,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:52:50,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013093046] [2025-03-08 22:52:50,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:52:50,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:52:50,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 22:52:51,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 22:52:51,001 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:52:51,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 22:52:51,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:52:51,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013093046] [2025-03-08 22:52:51,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013093046] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:52:51,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:52:51,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:52:51,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10915926] [2025-03-08 22:52:51,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:52:51,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:52:51,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:52:51,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:52:51,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:52:51,035 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2025-03-08 22:52:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:52:51,055 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2025-03-08 22:52:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:52:51,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 11 [2025-03-08 22:52:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:52:51,056 INFO L225 Difference]: With dead ends: 32 [2025-03-08 22:52:51,056 INFO L226 Difference]: Without dead ends: 32 [2025-03-08 22:52:51,056 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:52:51,057 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:52:51,057 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:52:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-08 22:52:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2025-03-08 22:52:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.32) internal successors, (33), 28 states have internal predecessors, (33), 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) [2025-03-08 22:52:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2025-03-08 22:52:51,060 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2025-03-08 22:52:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:52:51,060 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2025-03-08 22:52:51,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2025-03-08 22:52:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2025-03-08 22:52:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-08 22:52:51,061 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:52:51,061 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:52:51,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 22:52:51,061 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-08 22:52:51,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:52:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash 200089009, now seen corresponding path program 1 times [2025-03-08 22:52:51,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:52:51,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388352761] [2025-03-08 22:52:51,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:52:51,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:52:51,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 22:52:51,069 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 22:52:51,069 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:52:51,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:51,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:52:51,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388352761] [2025-03-08 22:52:51,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388352761] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:52:51,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965884546] [2025-03-08 22:52:51,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:52:51,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:52:51,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:52:51,112 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) [2025-03-08 22:52:51,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 22:52:51,141 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 22:52:51,147 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 22:52:51,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:52:51,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:51,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:52:51,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:52:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:51,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:52:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:51,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965884546] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:52:51,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 22:52:51,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-08 22:52:51,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376216193] [2025-03-08 22:52:51,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 22:52:51,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 22:52:51,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:52:51,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 22:52:51,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:52:51,198 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2025-03-08 22:52:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:52:51,224 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2025-03-08 22:52:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:52:51,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) Word has length 13 [2025-03-08 22:52:51,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:52:51,225 INFO L225 Difference]: With dead ends: 34 [2025-03-08 22:52:51,225 INFO L226 Difference]: Without dead ends: 34 [2025-03-08 22:52:51,226 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:52:51,226 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:52:51,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:52:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-08 22:52:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-03-08 22:52:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 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) [2025-03-08 22:52:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2025-03-08 22:52:51,228 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 13 [2025-03-08 22:52:51,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:52:51,228 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2025-03-08 22:52:51,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2025-03-08 22:52:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2025-03-08 22:52:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 22:52:51,229 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:52:51,230 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2025-03-08 22:52:51,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 22:52:51,430 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,SelfDestructingSolverStorable6 [2025-03-08 22:52:51,431 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-08 22:52:51,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:52:51,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1030150849, now seen corresponding path program 2 times [2025-03-08 22:52:51,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:52:51,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965978912] [2025-03-08 22:52:51,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 22:52:51,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:52:51,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 22:52:51,441 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 22:52:51,441 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 22:52:51,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:51,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:52:51,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965978912] [2025-03-08 22:52:51,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965978912] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:52:51,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527199761] [2025-03-08 22:52:51,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 22:52:51,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:52:51,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:52:51,591 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) [2025-03-08 22:52:51,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 22:52:51,619 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 22:52:51,629 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 22:52:51,629 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 22:52:51,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:51,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 22:52:51,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:52:51,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-08 22:52:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:51,746 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:52:51,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527199761] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:52:51,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 22:52:51,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2025-03-08 22:52:51,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548802258] [2025-03-08 22:52:51,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:52:51,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:52:51,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:52:51,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:52:51,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-03-08 22:52:51,748 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 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) [2025-03-08 22:52:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:52:51,791 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2025-03-08 22:52:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:52:51,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 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) Word has length 16 [2025-03-08 22:52:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:52:51,791 INFO L225 Difference]: With dead ends: 33 [2025-03-08 22:52:51,791 INFO L226 Difference]: Without dead ends: 33 [2025-03-08 22:52:51,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-03-08 22:52:51,793 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:52:51,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:52:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-08 22:52:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-03-08 22:52:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:52:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2025-03-08 22:52:51,796 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 16 [2025-03-08 22:52:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:52:51,796 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2025-03-08 22:52:51,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 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) [2025-03-08 22:52:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2025-03-08 22:52:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 22:52:51,797 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:52:51,797 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:52:51,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 22:52:52,001 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 [2025-03-08 22:52:52,001 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-08 22:52:52,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:52:52,002 INFO L85 PathProgramCache]: Analyzing trace with hash 512445169, now seen corresponding path program 2 times [2025-03-08 22:52:52,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:52:52,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982540138] [2025-03-08 22:52:52,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 22:52:52,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:52:52,007 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-08 22:52:52,015 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 22:52:52,015 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 22:52:52,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:52,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:52:52,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982540138] [2025-03-08 22:52:52,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982540138] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:52:52,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845068164] [2025-03-08 22:52:52,124 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 22:52:52,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:52:52,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:52:52,126 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) [2025-03-08 22:52:52,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 22:52:52,155 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-08 22:52:52,167 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 22:52:52,168 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 22:52:52,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:52:52,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 22:52:52,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:52:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:52,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:52:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:52:52,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845068164] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:52:52,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 22:52:52,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2025-03-08 22:52:52,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964628583] [2025-03-08 22:52:52,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 22:52:52,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 22:52:52,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:52:52,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 22:52:52,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:52:52,271 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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) [2025-03-08 22:52:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:52:52,312 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2025-03-08 22:52:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 22:52:52,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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) Word has length 25 [2025-03-08 22:52:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:52:52,313 INFO L225 Difference]: With dead ends: 45 [2025-03-08 22:52:52,313 INFO L226 Difference]: Without dead ends: 45 [2025-03-08 22:52:52,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:52:52,314 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:52:52,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:52:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-08 22:52:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2025-03-08 22:52:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 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) [2025-03-08 22:52:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2025-03-08 22:52:52,316 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 25 [2025-03-08 22:52:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:52:52,316 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2025-03-08 22:52:52,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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) [2025-03-08 22:52:52,317 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2025-03-08 22:52:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 22:52:52,317 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:52:52,317 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:52:52,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 22:52:52,517 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 [2025-03-08 22:52:52,518 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-08 22:52:52,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:52:52,518 INFO L85 PathProgramCache]: Analyzing trace with hash -586180559, now seen corresponding path program 3 times [2025-03-08 22:52:52,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:52:52,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597922425] [2025-03-08 22:52:52,519 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 22:52:52,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:52:52,527 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 11 equivalence classes. [2025-03-08 22:52:52,555 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 22:52:52,555 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-08 22:52:52,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 22:52:52,555 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 22:52:52,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 22:52:52,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 22:52:52,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:52:52,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 22:52:52,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-08 22:52:52,580 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 22:52:52,581 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 8 remaining) [2025-03-08 22:52:52,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2025-03-08 22:52:52,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2025-03-08 22:52:52,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (4 of 8 remaining) [2025-03-08 22:52:52,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (3 of 8 remaining) [2025-03-08 22:52:52,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (2 of 8 remaining) [2025-03-08 22:52:52,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2025-03-08 22:52:52,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 8 remaining) [2025-03-08 22:52:52,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 22:52:52,586 INFO L422 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2025-03-08 22:52:52,611 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-08 22:52:52,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.03 10:52:52 BoogieIcfgContainer [2025-03-08 22:52:52,614 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-08 22:52:52,615 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-08 22:52:52,615 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-08 22:52:52,615 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-08 22:52:52,615 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:52:49" (3/4) ... [2025-03-08 22:52:52,615 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-03-08 22:52:52,657 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 12. [2025-03-08 22:52:52,694 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-08 22:52:52,695 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-08 22:52:52,695 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-08 22:52:52,695 INFO L158 Benchmark]: Toolchain (without parser) took 3206.61ms. Allocated memory is still 167.8MB. Free memory was 122.9MB in the beginning and 85.4MB in the end (delta: 37.5MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB. [2025-03-08 22:52:52,695 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 201.3MB. Free memory is still 115.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:52:52,695 INFO L158 Benchmark]: CACSL2BoogieTranslator took 137.33ms. Allocated memory is still 167.8MB. Free memory was 122.9MB in the beginning and 112.8MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 22:52:52,696 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.57ms. Allocated memory is still 167.8MB. Free memory was 112.8MB in the beginning and 111.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:52:52,696 INFO L158 Benchmark]: Boogie Preprocessor took 28.98ms. Allocated memory is still 167.8MB. Free memory was 111.4MB in the beginning and 110.7MB in the end (delta: 679.4kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:52:52,696 INFO L158 Benchmark]: IcfgBuilder took 205.32ms. Allocated memory is still 167.8MB. Free memory was 110.7MB in the beginning and 97.5MB in the end (delta: 13.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 22:52:52,696 INFO L158 Benchmark]: TraceAbstraction took 2727.24ms. Allocated memory is still 167.8MB. Free memory was 97.5MB in the beginning and 91.1MB in the end (delta: 6.4MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2025-03-08 22:52:52,696 INFO L158 Benchmark]: Witness Printer took 80.17ms. Allocated memory is still 167.8MB. Free memory was 91.1MB in the beginning and 85.4MB in the end (delta: 5.7MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:52:52,697 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 201.3MB. Free memory is still 115.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 137.33ms. Allocated memory is still 167.8MB. Free memory was 122.9MB in the beginning and 112.8MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.57ms. Allocated memory is still 167.8MB. Free memory was 112.8MB in the beginning and 111.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 28.98ms. Allocated memory is still 167.8MB. Free memory was 111.4MB in the beginning and 110.7MB in the end (delta: 679.4kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 205.32ms. Allocated memory is still 167.8MB. Free memory was 110.7MB in the beginning and 97.5MB in the end (delta: 13.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 2727.24ms. Allocated memory is still 167.8MB. Free memory was 97.5MB in the beginning and 91.1MB in the end (delta: 6.4MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Witness Printer took 80.17ms. Allocated memory is still 167.8MB. Free memory was 91.1MB in the beginning and 85.4MB in the end (delta: 5.7MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; VAL [i=0, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [i=0, p={-1:0}] [L10] i++ VAL [i=1, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [i=1, p={-1:0}] [L10] i++ VAL [i=2, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [i=2, p={-1:0}] [L10] i++ VAL [i=3, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [i=3, p={-1:0}] [L10] i++ VAL [i=4, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [i=4, p={-1:0}] [L10] i++ VAL [i=5, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [i=5, p={-1:0}] [L10] i++ VAL [i=6, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [i=6, p={-1:0}] [L10] i++ VAL [i=7, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [i=7, p={-1:0}] [L10] i++ VAL [i=8, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [i=8, p={-1:0}] [L10] i++ VAL [i=9, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [i=9, p={-1:0}] [L10] i++ VAL [i=10, p={-1:0}] [L10] COND FALSE !(i < 10) [L14] free(p) VAL [p={-1:0}] [L14] free(p) VAL [p={-1:0}] [L14] free(p) [L16] p[2] - UnprovableResult [Line: 7]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 26 edges, 8 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 10, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 39 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 319 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 172 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 253 IncrementalHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 147 mSDtfsCounter, 253 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=9, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 13 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 181 ConstructedInterpolants, 0 QuantifiedInterpolants, 892 SizeOfPredicates, 0 NumberOfNonLiveVariables, 275 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 44/232 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-03-08 22:52:52,719 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)