./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-dietlibc/strrchr_short.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-dietlibc/strrchr_short.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 5714449da9967bbd2918d4305e52dc9c1161024d975984886640d613abe881d1 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 17:47:33,819 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 17:47:33,901 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-10-14 17:47:33,908 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 17:47:33,911 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 17:47:33,947 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 17:47:33,947 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 17:47:33,948 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 17:47:33,949 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 17:47:33,949 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 17:47:33,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 17:47:33,950 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 17:47:33,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 17:47:33,953 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 17:47:33,954 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 17:47:33,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 17:47:33,954 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 17:47:33,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 17:47:33,955 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 17:47:33,955 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 17:47:33,955 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 17:47:33,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 17:47:33,959 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 17:47:33,960 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 17:47:33,960 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 17:47:33,960 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 17:47:33,960 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 17:47:33,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 17:47:33,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 17:47:33,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 17:47:33,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:47:33,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 17:47:33,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 17:47:33,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 17:47:33,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 17:47:33,964 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 17:47:33,965 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 17:47:33,965 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 17:47:33,965 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 17:47:33,965 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5714449da9967bbd2918d4305e52dc9c1161024d975984886640d613abe881d1 [2024-10-14 17:47:34,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 17:47:34,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 17:47:34,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 17:47:34,235 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 17:47:34,236 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 17:47:34,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-dietlibc/strrchr_short.i [2024-10-14 17:47:35,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 17:47:35,935 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 17:47:35,938 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-dietlibc/strrchr_short.i [2024-10-14 17:47:35,952 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9ea860b/3dde4da5276a4cc697191c3a05e8ab6c/FLAG1cba54b3f [2024-10-14 17:47:35,967 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9ea860b/3dde4da5276a4cc697191c3a05e8ab6c [2024-10-14 17:47:35,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 17:47:35,971 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 17:47:35,972 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 17:47:35,972 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 17:47:35,978 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 17:47:35,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:47:35" (1/1) ... [2024-10-14 17:47:35,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ec3489b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:35, skipping insertion in model container [2024-10-14 17:47:35,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:47:35" (1/1) ... [2024-10-14 17:47:36,021 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 17:47:36,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:47:36,328 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 17:47:36,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:47:36,418 INFO L204 MainTranslator]: Completed translation [2024-10-14 17:47:36,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36 WrapperNode [2024-10-14 17:47:36,419 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 17:47:36,420 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 17:47:36,420 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 17:47:36,420 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 17:47:36,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,440 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,463 INFO L138 Inliner]: procedures = 113, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2024-10-14 17:47:36,464 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 17:47:36,464 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 17:47:36,464 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 17:47:36,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 17:47:36,475 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,479 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,494 INFO L175 MemorySlicer]: Split 3 memory accesses to 1 slices as follows [3]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2024-10-14 17:47:36,494 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,495 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,503 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,504 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,505 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,507 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 17:47:36,508 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 17:47:36,508 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 17:47:36,508 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 17:47:36,509 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (1/1) ... [2024-10-14 17:47:36,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:47:36,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:47:36,554 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) [2024-10-14 17:47:36,556 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 [2024-10-14 17:47:36,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 17:47:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 17:47:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 17:47:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 17:47:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 17:47:36,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 17:47:36,687 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 17:47:36,689 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 17:47:36,831 INFO L? ?]: Removed 28 outVars from TransFormulas that were not future-live. [2024-10-14 17:47:36,832 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 17:47:36,874 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 17:47:36,877 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-14 17:47:36,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:47:36 BoogieIcfgContainer [2024-10-14 17:47:36,878 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 17:47:36,880 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 17:47:36,880 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 17:47:36,885 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 17:47:36,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:47:35" (1/3) ... [2024-10-14 17:47:36,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54aa1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:47:36, skipping insertion in model container [2024-10-14 17:47:36,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:36" (2/3) ... [2024-10-14 17:47:36,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54aa1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:47:36, skipping insertion in model container [2024-10-14 17:47:36,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:47:36" (3/3) ... [2024-10-14 17:47:36,889 INFO L112 eAbstractionObserver]: Analyzing ICFG strrchr_short.i [2024-10-14 17:47:36,907 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 17:47:36,908 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-10-14 17:47:36,963 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 17:47:36,974 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;@6f2ad0dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 17:47:36,974 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-14 17:47:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 16 states have internal predecessors, (20), 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) [2024-10-14 17:47:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-14 17:47:36,984 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:36,985 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-14 17:47:36,985 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-14 17:47:36,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:36,990 INFO L85 PathProgramCache]: Analyzing trace with hash 70346, now seen corresponding path program 1 times [2024-10-14 17:47:37,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:37,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115119793] [2024-10-14 17:47:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:37,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:37,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:37,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115119793] [2024-10-14 17:47:37,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115119793] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:47:37,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:47:37,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 17:47:37,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821791499] [2024-10-14 17:47:37,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:47:37,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:47:37,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:47:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:47:37,215 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 16 states have internal predecessors, (20), 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, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2024-10-14 17:47:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:37,272 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2024-10-14 17:47:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:47:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2024-10-14 17:47:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:37,285 INFO L225 Difference]: With dead ends: 18 [2024-10-14 17:47:37,286 INFO L226 Difference]: Without dead ends: 16 [2024-10-14 17:47:37,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:47:37,293 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:47:37,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:47:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-14 17:47:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-14 17:47:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 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) [2024-10-14 17:47:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-10-14 17:47:37,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2024-10-14 17:47:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:37,328 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-10-14 17:47:37,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2024-10-14 17:47:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-10-14 17:47:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-14 17:47:37,330 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:37,331 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-14 17:47:37,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 17:47:37,331 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-14 17:47:37,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash 70379, now seen corresponding path program 1 times [2024-10-14 17:47:37,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:37,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124034179] [2024-10-14 17:47:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:37,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:37,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:37,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124034179] [2024-10-14 17:47:37,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124034179] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:47:37,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:47:37,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:47:37,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043809269] [2024-10-14 17:47:37,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:47:37,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:47:37,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:37,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:47:37,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:47:37,492 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2024-10-14 17:47:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:37,519 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2024-10-14 17:47:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:47:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2024-10-14 17:47:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:37,520 INFO L225 Difference]: With dead ends: 15 [2024-10-14 17:47:37,520 INFO L226 Difference]: Without dead ends: 15 [2024-10-14 17:47:37,521 INFO L431 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 [2024-10-14 17:47:37,522 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:47:37,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:47:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-14 17:47:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-14 17:47:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 14 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) [2024-10-14 17:47:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-10-14 17:47:37,525 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2024-10-14 17:47:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:37,526 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-10-14 17:47:37,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2024-10-14 17:47:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-10-14 17:47:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-14 17:47:37,526 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:37,527 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-14 17:47:37,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 17:47:37,527 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-14 17:47:37,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash 70380, now seen corresponding path program 1 times [2024-10-14 17:47:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:37,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267322089] [2024-10-14 17:47:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:37,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:37,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:37,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267322089] [2024-10-14 17:47:37,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267322089] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:47:37,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:47:37,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:47:37,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677931272] [2024-10-14 17:47:37,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:47:37,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:47:37,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:37,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:47:37,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:47:37,801 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2024-10-14 17:47:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:37,847 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2024-10-14 17:47:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:47:37,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2024-10-14 17:47:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:37,849 INFO L225 Difference]: With dead ends: 14 [2024-10-14 17:47:37,850 INFO L226 Difference]: Without dead ends: 14 [2024-10-14 17:47:37,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:47:37,852 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 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 [2024-10-14 17:47:37,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:47:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-14 17:47:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-10-14 17:47:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 13 states have internal predecessors, (15), 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) [2024-10-14 17:47:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-10-14 17:47:37,858 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 3 [2024-10-14 17:47:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:37,858 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-10-14 17:47:37,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2024-10-14 17:47:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-10-14 17:47:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-14 17:47:37,873 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:37,873 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-14 17:47:37,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 17:47:37,874 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-14 17:47:37,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:37,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2182757, now seen corresponding path program 1 times [2024-10-14 17:47:37,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:37,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752957540] [2024-10-14 17:47:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:37,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:37,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:37,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752957540] [2024-10-14 17:47:37,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752957540] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:47:37,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:47:37,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:47:37,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098313505] [2024-10-14 17:47:37,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:47:37,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:47:37,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:37,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:47:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:47:37,973 INFO L87 Difference]: Start difference. First operand 14 states and 15 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) [2024-10-14 17:47:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:38,001 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2024-10-14 17:47:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:47:38,002 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 [2024-10-14 17:47:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:38,003 INFO L225 Difference]: With dead ends: 12 [2024-10-14 17:47:38,003 INFO L226 Difference]: Without dead ends: 12 [2024-10-14 17:47:38,004 INFO L431 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 [2024-10-14 17:47:38,005 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:47:38,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:47:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-10-14 17:47:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-10-14 17:47:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 11 states have internal predecessors, (13), 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) [2024-10-14 17:47:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-10-14 17:47:38,010 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 4 [2024-10-14 17:47:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:38,011 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-10-14 17:47:38,011 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) [2024-10-14 17:47:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-10-14 17:47:38,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-14 17:47:38,013 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:38,015 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-14 17:47:38,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 17:47:38,015 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-14 17:47:38,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2182758, now seen corresponding path program 1 times [2024-10-14 17:47:38,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:38,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439045130] [2024-10-14 17:47:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:38,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:38,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439045130] [2024-10-14 17:47:38,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439045130] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:47:38,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:47:38,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:47:38,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234678774] [2024-10-14 17:47:38,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:47:38,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:47:38,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:38,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:47:38,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:47:38,258 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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) [2024-10-14 17:47:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:38,296 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2024-10-14 17:47:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:47:38,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 [2024-10-14 17:47:38,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:38,298 INFO L225 Difference]: With dead ends: 17 [2024-10-14 17:47:38,298 INFO L226 Difference]: Without dead ends: 17 [2024-10-14 17:47:38,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:47:38,301 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:47:38,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 16 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:47:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-14 17:47:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2024-10-14 17:47:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 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) [2024-10-14 17:47:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-10-14 17:47:38,305 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 4 [2024-10-14 17:47:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:38,306 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-10-14 17:47:38,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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) [2024-10-14 17:47:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-10-14 17:47:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:47:38,307 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:38,307 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:47:38,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 17:47:38,308 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-14 17:47:38,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1481961914, now seen corresponding path program 1 times [2024-10-14 17:47:38,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:38,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868030789] [2024-10-14 17:47:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:38,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:38,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868030789] [2024-10-14 17:47:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868030789] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:47:38,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144946543] [2024-10-14 17:47:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:38,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:47:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:47:38,649 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) [2024-10-14 17:47:38,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 17:47:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:38,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 17:47:38,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:47:38,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2024-10-14 17:47:39,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:47:39,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-10-14 17:47:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:39,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:47:39,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-14 17:47:39,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-14 17:47:39,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 17:47:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:39,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144946543] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:47:39,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:47:39,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-10-14 17:47:39,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057961464] [2024-10-14 17:47:39,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:47:39,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 17:47:39,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 17:47:39,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-10-14 17:47:39,336 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2024-10-14 17:47:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:39,475 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2024-10-14 17:47:39,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 17:47:39,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 8 [2024-10-14 17:47:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:39,476 INFO L225 Difference]: With dead ends: 21 [2024-10-14 17:47:39,477 INFO L226 Difference]: Without dead ends: 21 [2024-10-14 17:47:39,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-10-14 17:47:39,478 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:47:39,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:47:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-14 17:47:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2024-10-14 17:47:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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) [2024-10-14 17:47:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-10-14 17:47:39,481 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2024-10-14 17:47:39,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:39,481 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-10-14 17:47:39,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2024-10-14 17:47:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-10-14 17:47:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 17:47:39,482 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:39,482 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:47:39,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 17:47:39,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 17:47:39,687 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-14 17:47:39,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1303822217, now seen corresponding path program 1 times [2024-10-14 17:47:39,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:39,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712361585] [2024-10-14 17:47:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:39,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:39,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:39,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712361585] [2024-10-14 17:47:39,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712361585] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:47:39,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:47:39,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:47:39,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296278048] [2024-10-14 17:47:39,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:47:39,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:47:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:47:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:47:39,789 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-10-14 17:47:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:39,804 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2024-10-14 17:47:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:47:39,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2024-10-14 17:47:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:39,805 INFO L225 Difference]: With dead ends: 15 [2024-10-14 17:47:39,805 INFO L226 Difference]: Without dead ends: 13 [2024-10-14 17:47:39,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:47:39,806 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:47:39,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:47:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-14 17:47:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-14 17:47:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2024-10-14 17:47:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-10-14 17:47:39,808 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2024-10-14 17:47:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:39,810 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-10-14 17:47:39,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-10-14 17:47:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-10-14 17:47:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-14 17:47:39,811 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:39,811 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2024-10-14 17:47:39,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 17:47:39,811 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-14 17:47:39,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:39,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1553910542, now seen corresponding path program 2 times [2024-10-14 17:47:39,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:39,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134330031] [2024-10-14 17:47:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:39,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:40,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134330031] [2024-10-14 17:47:40,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134330031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:47:40,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989648913] [2024-10-14 17:47:40,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:47:40,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:47:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:47:40,352 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) [2024-10-14 17:47:40,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 17:47:40,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:47:40,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:47:40,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-14 17:47:40,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:47:40,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2024-10-14 17:47:40,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:47:40,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 26 [2024-10-14 17:47:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:40,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:47:41,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-10-14 17:47:41,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2024-10-14 17:47:41,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 53 [2024-10-14 17:47:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:41,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989648913] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:47:41,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:47:41,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-10-14 17:47:41,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853745009] [2024-10-14 17:47:41,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:47:41,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-14 17:47:41,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:41,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-14 17:47:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:47:41,314 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 28 states, 27 states have (on average 1.2222222222222223) 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) [2024-10-14 17:47:49,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:47:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:50,115 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2024-10-14 17:47:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 17:47:50,116 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.2222222222222223) 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) Word has length 12 [2024-10-14 17:47:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:50,117 INFO L225 Difference]: With dead ends: 35 [2024-10-14 17:47:50,117 INFO L226 Difference]: Without dead ends: 35 [2024-10-14 17:47:50,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=280, Invalid=1610, Unknown=2, NotChecked=0, Total=1892 [2024-10-14 17:47:50,118 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 49 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:47:50,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 4 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 345 Invalid, 5 Unknown, 0 Unchecked, 3.0s Time] [2024-10-14 17:47:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-14 17:47:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2024-10-14 17:47:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:47:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-10-14 17:47:50,124 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2024-10-14 17:47:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:50,125 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-10-14 17:47:50,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.2222222222222223) 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) [2024-10-14 17:47:50,125 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-10-14 17:47:50,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-14 17:47:50,126 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:50,126 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-14 17:47:50,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 17:47:50,330 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,SelfDestructingSolverStorable7 [2024-10-14 17:47:50,331 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-14 17:47:50,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:50,331 INFO L85 PathProgramCache]: Analyzing trace with hash 183812896, now seen corresponding path program 1 times [2024-10-14 17:47:50,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:50,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877001407] [2024-10-14 17:47:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:50,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:50,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:50,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877001407] [2024-10-14 17:47:50,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877001407] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:47:50,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350237208] [2024-10-14 17:47:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:50,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:47:50,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:47:50,700 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) [2024-10-14 17:47:50,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 17:47:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:50,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-14 17:47:50,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:47:50,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2024-10-14 17:47:51,640 INFO L349 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2024-10-14 17:47:51,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 58 [2024-10-14 17:47:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:51,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:47:52,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 90 [2024-10-14 17:47:52,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 162 [2024-10-14 17:47:52,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 17:47:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:52,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350237208] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:47:52,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:47:52,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 28 [2024-10-14 17:47:52,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229436317] [2024-10-14 17:47:52,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:47:52,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-14 17:47:52,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-14 17:47:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2024-10-14 17:47:52,296 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 29 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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) [2024-10-14 17:47:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:55,775 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2024-10-14 17:47:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-14 17:47:55,775 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 [2024-10-14 17:47:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:55,777 INFO L225 Difference]: With dead ends: 79 [2024-10-14 17:47:55,778 INFO L226 Difference]: Without dead ends: 79 [2024-10-14 17:47:55,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1034, Invalid=5446, Unknown=0, NotChecked=0, Total=6480 [2024-10-14 17:47:55,782 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 136 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-14 17:47:55,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 466 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2024-10-14 17:47:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-14 17:47:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2024-10-14 17:47:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:47:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-10-14 17:47:55,793 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 16 [2024-10-14 17:47:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:55,795 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-10-14 17:47:55,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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) [2024-10-14 17:47:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-10-14 17:47:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-14 17:47:55,796 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:55,796 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1] [2024-10-14 17:47:55,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 17:47:55,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:47:55,997 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-14 17:47:55,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash 780892532, now seen corresponding path program 2 times [2024-10-14 17:47:55,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:55,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441550184] [2024-10-14 17:47:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:55,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:56,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:56,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441550184] [2024-10-14 17:47:56,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441550184] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:47:56,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829877995] [2024-10-14 17:47:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:47:56,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:47:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:47:56,480 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) [2024-10-14 17:47:56,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 17:47:56,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:47:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:47:56,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-14 17:47:56,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:47:56,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2024-10-14 17:48:13,547 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-10-14 17:48:13,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 41 [2024-10-14 17:48:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:48:13,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:48:14,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-10-14 17:48:14,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 73 [2024-10-14 17:48:14,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 105 [2024-10-14 17:48:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:48:14,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829877995] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:48:14,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:48:14,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 38 [2024-10-14 17:48:14,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311803500] [2024-10-14 17:48:14,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:48:14,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-14 17:48:14,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:48:14,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-14 17:48:14,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1320, Unknown=5, NotChecked=0, Total=1482 [2024-10-14 17:48:14,411 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 39 states have internal predecessors, (55), 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) [2024-10-14 17:48:23,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:48:36,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:48:48,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:48:57,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:49:01,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:49:13,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]