./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 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/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 16:20:48,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 16:20:48,461 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 16:20:48,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 16:20:48,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 16:20:48,495 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 16:20:48,495 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 16:20:48,496 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 16:20:48,496 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 16:20:48,496 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 16:20:48,497 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 16:20:48,497 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 16:20:48,497 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 16:20:48,498 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 16:20:48,498 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 16:20:48,498 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 16:20:48,502 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 16:20:48,503 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 16:20:48,503 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 16:20:48,503 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 16:20:48,504 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 16:20:48,504 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 16:20:48,504 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 16:20:48,504 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 16:20:48,505 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 16:20:48,505 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 16:20:48,505 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 16:20:48,505 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 16:20:48,506 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 16:20:48,506 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 16:20:48,506 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 16:20:48,506 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 16:20:48,506 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 16:20:48,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:20:48,507 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 16:20:48,507 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 16:20:48,507 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 16:20:48,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 16:20:48,508 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 16:20:48,508 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 16:20:48,508 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 16:20:48,510 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 16:20:48,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2024-10-24 16:20:48,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 16:20:48,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 16:20:48,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 16:20:48,726 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 16:20:48,726 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 16:20:48,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2024-10-24 16:20:50,015 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 16:20:50,164 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 16:20:50,165 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2024-10-24 16:20:50,173 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a3ed54fe/7c01695fb6b3477085f23f013b7ecccb/FLAG932b54a1d [2024-10-24 16:20:50,576 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a3ed54fe/7c01695fb6b3477085f23f013b7ecccb [2024-10-24 16:20:50,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 16:20:50,579 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 16:20:50,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 16:20:50,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 16:20:50,585 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 16:20:50,585 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fd932c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50, skipping insertion in model container [2024-10-24 16:20:50,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,599 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 16:20:50,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:20:50,735 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 16:20:50,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:20:50,760 INFO L204 MainTranslator]: Completed translation [2024-10-24 16:20:50,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50 WrapperNode [2024-10-24 16:20:50,761 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 16:20:50,762 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 16:20:50,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 16:20:50,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 16:20:50,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,772 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,787 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-10-24 16:20:50,788 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 16:20:50,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 16:20:50,789 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 16:20:50,789 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 16:20:50,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,799 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,808 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 1 writes are split as follows [1, 0]. [2024-10-24 16:20:50,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,814 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,820 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,822 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 16:20:50,827 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 16:20:50,828 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 16:20:50,828 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 16:20:50,828 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (1/1) ... [2024-10-24 16:20:50,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:20:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:50,865 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) [2024-10-24 16:20:50,868 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 [2024-10-24 16:20:50,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 16:20:50,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 16:20:50,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 16:20:50,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 16:20:50,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 16:20:50,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 16:20:50,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 16:20:50,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 16:20:50,975 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 16:20:50,977 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 16:20:51,132 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-10-24 16:20:51,133 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 16:20:51,167 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 16:20:51,168 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-24 16:20:51,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:20:51 BoogieIcfgContainer [2024-10-24 16:20:51,168 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 16:20:51,170 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 16:20:51,170 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 16:20:51,175 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 16:20:51,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:20:50" (1/3) ... [2024-10-24 16:20:51,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c7cdc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:20:51, skipping insertion in model container [2024-10-24 16:20:51,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:50" (2/3) ... [2024-10-24 16:20:51,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c7cdc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:20:51, skipping insertion in model container [2024-10-24 16:20:51,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:20:51" (3/3) ... [2024-10-24 16:20:51,183 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2024-10-24 16:20:51,198 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 16:20:51,198 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-10-24 16:20:51,234 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 16:20:51,242 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;@3419ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 16:20:51,243 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-10-24 16:20:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 21 states have internal predecessors, (28), 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) [2024-10-24 16:20:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-24 16:20:51,256 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:51,256 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-24 16:20:51,258 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:51,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:51,264 INFO L85 PathProgramCache]: Analyzing trace with hash 3108451, now seen corresponding path program 1 times [2024-10-24 16:20:51,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:51,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709796366] [2024-10-24 16:20:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:51,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:51,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:51,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709796366] [2024-10-24 16:20:51,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709796366] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:51,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:51,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:20:51,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719433468] [2024-10-24 16:20:51,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:51,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:20:51,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:51,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:20:51,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:20:51,549 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 21 states have internal predecessors, (28), 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 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) [2024-10-24 16:20:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:51,610 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-10-24 16:20:51,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:20:51,616 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 [2024-10-24 16:20:51,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:51,622 INFO L225 Difference]: With dead ends: 27 [2024-10-24 16:20:51,623 INFO L226 Difference]: Without dead ends: 26 [2024-10-24 16:20:51,626 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 [2024-10-24 16:20:51,631 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:51,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:51,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-24 16:20:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-10-24 16:20:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 states have internal predecessors, (27), 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) [2024-10-24 16:20:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-10-24 16:20:51,661 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2024-10-24 16:20:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:51,662 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-10-24 16:20:51,662 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) [2024-10-24 16:20:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-10-24 16:20:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-24 16:20:51,662 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:51,663 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 16:20:51,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 16:20:51,663 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:51,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash 96326476, now seen corresponding path program 1 times [2024-10-24 16:20:51,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:51,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103537129] [2024-10-24 16:20:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:51,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:51,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:51,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103537129] [2024-10-24 16:20:51,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103537129] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:51,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:51,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:20:51,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570225465] [2024-10-24 16:20:51,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:51,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:20:51,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:20:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:20:51,745 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2024-10-24 16:20:51,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:51,790 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-10-24 16:20:51,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:20:51,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2024-10-24 16:20:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:51,792 INFO L225 Difference]: With dead ends: 39 [2024-10-24 16:20:51,792 INFO L226 Difference]: Without dead ends: 39 [2024-10-24 16:20:51,792 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 [2024-10-24 16:20:51,793 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:51,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-24 16:20:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2024-10-24 16:20:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 states have internal predecessors, (29), 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) [2024-10-24 16:20:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-24 16:20:51,799 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2024-10-24 16:20:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:51,800 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-24 16:20:51,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2024-10-24 16:20:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-24 16:20:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-24 16:20:51,801 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:51,801 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 16:20:51,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 16:20:51,801 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:51,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash 96361891, now seen corresponding path program 1 times [2024-10-24 16:20:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:51,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828506973] [2024-10-24 16:20:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:51,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:51,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:51,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828506973] [2024-10-24 16:20:51,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828506973] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:51,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:51,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:20:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233075946] [2024-10-24 16:20:51,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:51,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:20:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:20:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:20:51,893 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-10-24 16:20:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:51,966 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-10-24 16:20:51,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:20:51,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2024-10-24 16:20:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:51,968 INFO L225 Difference]: With dead ends: 41 [2024-10-24 16:20:51,969 INFO L226 Difference]: Without dead ends: 41 [2024-10-24 16:20:51,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:20:51,971 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:51,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:51,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-24 16:20:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2024-10-24 16:20:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 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) [2024-10-24 16:20:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-10-24 16:20:51,977 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 5 [2024-10-24 16:20:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:51,978 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-10-24 16:20:51,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-10-24 16:20:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-10-24 16:20:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-24 16:20:51,979 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:51,979 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 16:20:51,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 16:20:51,979 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:51,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:51,980 INFO L85 PathProgramCache]: Analyzing trace with hash 96362034, now seen corresponding path program 1 times [2024-10-24 16:20:51,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:51,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309464437] [2024-10-24 16:20:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:51,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:52,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:52,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309464437] [2024-10-24 16:20:52,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309464437] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:52,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:52,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:20:52,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48582380] [2024-10-24 16:20:52,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:52,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:20:52,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:52,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:20:52,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:20:52,082 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-10-24 16:20:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:52,122 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-10-24 16:20:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:20:52,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2024-10-24 16:20:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:52,123 INFO L225 Difference]: With dead ends: 25 [2024-10-24 16:20:52,124 INFO L226 Difference]: Without dead ends: 25 [2024-10-24 16:20:52,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:20:52,125 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:52,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 17 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-24 16:20:52,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-24 16:20:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 24 states have internal predecessors, (29), 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) [2024-10-24 16:20:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-24 16:20:52,131 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2024-10-24 16:20:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:52,132 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-24 16:20:52,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-10-24 16:20:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-24 16:20:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-24 16:20:52,133 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:52,133 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 16:20:52,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 16:20:52,134 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:52,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash 96362035, now seen corresponding path program 1 times [2024-10-24 16:20:52,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:52,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286600368] [2024-10-24 16:20:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:52,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:52,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:52,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286600368] [2024-10-24 16:20:52,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286600368] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:52,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:52,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:20:52,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444343639] [2024-10-24 16:20:52,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:52,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:20:52,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:20:52,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:20:52,242 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-10-24 16:20:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:52,305 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-10-24 16:20:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:20:52,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2024-10-24 16:20:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:52,307 INFO L225 Difference]: With dead ends: 27 [2024-10-24 16:20:52,307 INFO L226 Difference]: Without dead ends: 27 [2024-10-24 16:20:52,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:20:52,308 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:52,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-24 16:20:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-10-24 16:20:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 25 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) [2024-10-24 16:20:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-10-24 16:20:52,316 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 5 [2024-10-24 16:20:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:52,317 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-10-24 16:20:52,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-10-24 16:20:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-10-24 16:20:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 16:20:52,318 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:52,318 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-24 16:20:52,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 16:20:52,319 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:52,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1885310484, now seen corresponding path program 1 times [2024-10-24 16:20:52,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:52,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637982795] [2024-10-24 16:20:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:52,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:52,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:52,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637982795] [2024-10-24 16:20:52,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637982795] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:52,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710379821] [2024-10-24 16:20:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:52,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:52,402 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) [2024-10-24 16:20:52,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 16:20:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:52,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 16:20:52,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:52,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:52,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710379821] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:52,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:52,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 16:20:52,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917986786] [2024-10-24 16:20:52,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:52,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 16:20:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 16:20:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:20:52,545 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:52,623 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2024-10-24 16:20:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:20:52,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-24 16:20:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:52,625 INFO L225 Difference]: With dead ends: 38 [2024-10-24 16:20:52,625 INFO L226 Difference]: Without dead ends: 38 [2024-10-24 16:20:52,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:20:52,626 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:52,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-24 16:20:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2024-10-24 16:20:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 33 states have internal predecessors, (43), 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) [2024-10-24 16:20:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-10-24 16:20:52,637 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 7 [2024-10-24 16:20:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:52,637 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-10-24 16:20:52,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-10-24 16:20:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-24 16:20:52,638 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:52,638 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:52,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 16:20:52,838 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 [2024-10-24 16:20:52,839 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:52,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:52,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1684917050, now seen corresponding path program 1 times [2024-10-24 16:20:52,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:52,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178722063] [2024-10-24 16:20:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:52,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:52,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:52,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178722063] [2024-10-24 16:20:52,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178722063] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:52,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724413103] [2024-10-24 16:20:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:52,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:52,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:52,899 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) [2024-10-24 16:20:52,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 16:20:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:52,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 16:20:52,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:52,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:53,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724413103] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:53,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:53,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-24 16:20:53,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853777701] [2024-10-24 16:20:53,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:53,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:20:53,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:20:53,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:20:53,023 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:53,164 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2024-10-24 16:20:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 16:20:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-24 16:20:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:53,166 INFO L225 Difference]: With dead ends: 55 [2024-10-24 16:20:53,166 INFO L226 Difference]: Without dead ends: 55 [2024-10-24 16:20:53,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2024-10-24 16:20:53,167 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:53,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 33 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-24 16:20:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2024-10-24 16:20:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-10-24 16:20:53,170 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 8 [2024-10-24 16:20:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:53,170 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-10-24 16:20:53,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-10-24 16:20:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-24 16:20:53,171 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:53,171 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-24 16:20:53,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 16:20:53,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-24 16:20:53,372 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:53,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:53,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1684917194, now seen corresponding path program 1 times [2024-10-24 16:20:53,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:53,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677449323] [2024-10-24 16:20:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:53,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:53,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:53,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677449323] [2024-10-24 16:20:53,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677449323] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:53,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83818489] [2024-10-24 16:20:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:53,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:53,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:53,479 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) [2024-10-24 16:20:53,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 16:20:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:53,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 16:20:53,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:53,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-24 16:20:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:53,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:53,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83818489] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:53,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:53,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-24 16:20:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097928942] [2024-10-24 16:20:53,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:53,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 16:20:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:53,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 16:20:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:20:53,750 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:53,855 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2024-10-24 16:20:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:20:53,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-24 16:20:53,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:53,856 INFO L225 Difference]: With dead ends: 36 [2024-10-24 16:20:53,856 INFO L226 Difference]: Without dead ends: 36 [2024-10-24 16:20:53,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2024-10-24 16:20:53,857 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:53,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-24 16:20:53,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-10-24 16:20:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 33 states have internal predecessors, (39), 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) [2024-10-24 16:20:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-10-24 16:20:53,860 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 8 [2024-10-24 16:20:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:53,860 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-10-24 16:20:53,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-10-24 16:20:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 16:20:53,861 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:53,861 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-10-24 16:20:53,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 16:20:54,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:54,063 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:54,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash 87024195, now seen corresponding path program 2 times [2024-10-24 16:20:54,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:54,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347145548] [2024-10-24 16:20:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:54,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:54,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:54,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347145548] [2024-10-24 16:20:54,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347145548] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:54,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:54,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:20:54,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710214157] [2024-10-24 16:20:54,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:54,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:20:54,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:20:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:20:54,154 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-10-24 16:20:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:54,175 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-10-24 16:20:54,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:20:54,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-24 16:20:54,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:54,176 INFO L225 Difference]: With dead ends: 32 [2024-10-24 16:20:54,176 INFO L226 Difference]: Without dead ends: 32 [2024-10-24 16:20:54,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:20:54,177 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:54,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-24 16:20:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-24 16:20:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-10-24 16:20:54,184 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2024-10-24 16:20:54,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:54,184 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-10-24 16:20:54,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-10-24 16:20:54,184 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-10-24 16:20:54,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 16:20:54,184 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:54,185 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-10-24 16:20:54,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 16:20:54,185 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:54,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:54,185 INFO L85 PathProgramCache]: Analyzing trace with hash 87024196, now seen corresponding path program 1 times [2024-10-24 16:20:54,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:54,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269672012] [2024-10-24 16:20:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:54,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:20:54,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:54,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269672012] [2024-10-24 16:20:54,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269672012] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:54,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:54,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:20:54,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969027498] [2024-10-24 16:20:54,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:54,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:20:54,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:54,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:20:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:20:54,275 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:54,296 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-10-24 16:20:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:20:54,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-24 16:20:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:54,297 INFO L225 Difference]: With dead ends: 51 [2024-10-24 16:20:54,298 INFO L226 Difference]: Without dead ends: 51 [2024-10-24 16:20:54,298 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 [2024-10-24 16:20:54,298 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:54,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-24 16:20:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2024-10-24 16:20:54,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-10-24 16:20:54,301 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 11 [2024-10-24 16:20:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:54,302 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-10-24 16:20:54,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-10-24 16:20:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-24 16:20:54,302 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:54,302 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:54,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 16:20:54,303 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:54,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:54,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1284463060, now seen corresponding path program 1 times [2024-10-24 16:20:54,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:54,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481689581] [2024-10-24 16:20:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:20:54,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:54,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481689581] [2024-10-24 16:20:54,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481689581] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:54,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856254804] [2024-10-24 16:20:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:54,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:54,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:54,379 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) [2024-10-24 16:20:54,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 16:20:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:54,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 16:20:54,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:20:54,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:54,528 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 18 [2024-10-24 16:20:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:20:54,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856254804] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:54,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:54,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-24 16:20:54,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202209841] [2024-10-24 16:20:54,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:54,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 16:20:54,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:54,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 16:20:54,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:20:54,566 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:54,629 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-10-24 16:20:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:20:54,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-24 16:20:54,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:54,630 INFO L225 Difference]: With dead ends: 53 [2024-10-24 16:20:54,630 INFO L226 Difference]: Without dead ends: 53 [2024-10-24 16:20:54,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:20:54,631 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:54,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 18 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-24 16:20:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2024-10-24 16:20:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 49 states have internal predecessors, (60), 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) [2024-10-24 16:20:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-10-24 16:20:54,634 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 15 [2024-10-24 16:20:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:54,635 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-10-24 16:20:54,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-10-24 16:20:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-24 16:20:54,635 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:54,636 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2024-10-24 16:20:54,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 16:20:54,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:54,840 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:54,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:54,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1343436067, now seen corresponding path program 2 times [2024-10-24 16:20:54,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:54,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109835716] [2024-10-24 16:20:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:54,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:54,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:54,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109835716] [2024-10-24 16:20:54,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109835716] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:54,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749640373] [2024-10-24 16:20:54,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:20:54,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:54,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:54,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:54,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 16:20:54,989 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:20:54,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:54,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 16:20:54,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:20:55,051 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:20:55,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749640373] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:55,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:20:55,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2024-10-24 16:20:55,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264677116] [2024-10-24 16:20:55,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:55,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:20:55,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:55,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:20:55,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-24 16:20:55,053 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2024-10-24 16:20:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:55,116 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2024-10-24 16:20:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:20:55,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) Word has length 16 [2024-10-24 16:20:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:55,117 INFO L225 Difference]: With dead ends: 43 [2024-10-24 16:20:55,117 INFO L226 Difference]: Without dead ends: 43 [2024-10-24 16:20:55,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-10-24 16:20:55,118 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:55,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-24 16:20:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-24 16:20:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-10-24 16:20:55,124 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 16 [2024-10-24 16:20:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:55,124 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-10-24 16:20:55,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2024-10-24 16:20:55,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-10-24 16:20:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-24 16:20:55,124 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:55,124 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:55,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 16:20:55,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-24 16:20:55,326 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:55,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:55,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1713387055, now seen corresponding path program 1 times [2024-10-24 16:20:55,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:55,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280966441] [2024-10-24 16:20:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:55,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:20:55,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280966441] [2024-10-24 16:20:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280966441] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694367963] [2024-10-24 16:20:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:55,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:55,385 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:55,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 16:20:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:55,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 16:20:55,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:55,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:55,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694367963] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:55,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:55,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-10-24 16:20:55,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006349214] [2024-10-24 16:20:55,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:55,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 16:20:55,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:55,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 16:20:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:20:55,540 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:55,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:55,654 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2024-10-24 16:20:55,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:20:55,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-24 16:20:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:55,656 INFO L225 Difference]: With dead ends: 91 [2024-10-24 16:20:55,656 INFO L226 Difference]: Without dead ends: 91 [2024-10-24 16:20:55,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2024-10-24 16:20:55,656 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:55,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 37 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:55,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-24 16:20:55,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2024-10-24 16:20:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.329268292682927) internal successors, (109), 86 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2024-10-24 16:20:55,665 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 17 [2024-10-24 16:20:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:55,666 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2024-10-24 16:20:55,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2024-10-24 16:20:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:20:55,666 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:55,666 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1] [2024-10-24 16:20:55,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 16:20:55,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:55,868 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:55,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1817303157, now seen corresponding path program 1 times [2024-10-24 16:20:55,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:55,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476384225] [2024-10-24 16:20:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:20:56,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:56,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476384225] [2024-10-24 16:20:56,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476384225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:56,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827466125] [2024-10-24 16:20:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:56,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:56,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:56,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:56,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 16:20:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:56,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 16:20:56,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:20:56,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:20:56,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827466125] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:56,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:56,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-10-24 16:20:56,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463024916] [2024-10-24 16:20:56,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:56,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 16:20:56,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:56,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 16:20:56,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-24 16:20:56,199 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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) [2024-10-24 16:20:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:56,345 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2024-10-24 16:20:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 16:20:56,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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 21 [2024-10-24 16:20:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:56,347 INFO L225 Difference]: With dead ends: 87 [2024-10-24 16:20:56,347 INFO L226 Difference]: Without dead ends: 87 [2024-10-24 16:20:56,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-10-24 16:20:56,348 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:56,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 21 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-24 16:20:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-10-24 16:20:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 86 states have internal predecessors, (106), 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) [2024-10-24 16:20:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2024-10-24 16:20:56,355 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 21 [2024-10-24 16:20:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:56,355 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2024-10-24 16:20:56,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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) [2024-10-24 16:20:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2024-10-24 16:20:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-24 16:20:56,356 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:56,356 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1] [2024-10-24 16:20:56,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 16:20:56,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:56,557 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:56,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:56,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1209637900, now seen corresponding path program 2 times [2024-10-24 16:20:56,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:56,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915317540] [2024-10-24 16:20:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:56,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 16:20:56,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:56,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915317540] [2024-10-24 16:20:56,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915317540] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:56,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517767018] [2024-10-24 16:20:56,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:20:56,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:56,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:56,705 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:56,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 16:20:56,761 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:20:56,762 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:56,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 16:20:56,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:56,778 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 10 treesize of output 8 [2024-10-24 16:20:56,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-24 16:20:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 16:20:56,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 16:20:56,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517767018] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:56,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:56,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 7 [2024-10-24 16:20:56,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065692554] [2024-10-24 16:20:56,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:56,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:20:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:20:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:20:56,996 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 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) [2024-10-24 16:20:57,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:57,070 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2024-10-24 16:20:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:20:57,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 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 24 [2024-10-24 16:20:57,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:57,071 INFO L225 Difference]: With dead ends: 110 [2024-10-24 16:20:57,071 INFO L226 Difference]: Without dead ends: 110 [2024-10-24 16:20:57,071 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:20:57,071 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:57,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 45 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:57,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-24 16:20:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2024-10-24 16:20:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 103 states have internal predecessors, (125), 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) [2024-10-24 16:20:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2024-10-24 16:20:57,079 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 24 [2024-10-24 16:20:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:57,082 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2024-10-24 16:20:57,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 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) [2024-10-24 16:20:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2024-10-24 16:20:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 16:20:57,083 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:57,083 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1] [2024-10-24 16:20:57,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 16:20:57,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-24 16:20:57,284 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:57,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:57,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1474307132, now seen corresponding path program 1 times [2024-10-24 16:20:57,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:57,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547550889] [2024-10-24 16:20:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:57,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:20:57,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:57,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547550889] [2024-10-24 16:20:57,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547550889] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:57,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744548981] [2024-10-24 16:20:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:57,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:57,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:57,438 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:57,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 16:20:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:57,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 16:20:57,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:20:57,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:20:57,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744548981] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:57,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:57,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2024-10-24 16:20:57,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372255152] [2024-10-24 16:20:57,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:57,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 16:20:57,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 16:20:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-10-24 16:20:57,656 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 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) [2024-10-24 16:20:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:57,810 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2024-10-24 16:20:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 16:20:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 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 26 [2024-10-24 16:20:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:57,811 INFO L225 Difference]: With dead ends: 99 [2024-10-24 16:20:57,812 INFO L226 Difference]: Without dead ends: 99 [2024-10-24 16:20:57,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2024-10-24 16:20:57,812 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:57,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 53 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-24 16:20:57,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-10-24 16:20:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 98 states have internal predecessors, (116), 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) [2024-10-24 16:20:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2024-10-24 16:20:57,816 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 26 [2024-10-24 16:20:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:57,816 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2024-10-24 16:20:57,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 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) [2024-10-24 16:20:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2024-10-24 16:20:57,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-24 16:20:57,817 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:57,817 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 1, 1] [2024-10-24 16:20:57,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 16:20:58,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-24 16:20:58,022 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:58,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:58,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1216344948, now seen corresponding path program 2 times [2024-10-24 16:20:58,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:58,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373097791] [2024-10-24 16:20:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:58,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 21 proven. 114 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 16:20:58,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:58,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373097791] [2024-10-24 16:20:58,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373097791] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:58,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288485483] [2024-10-24 16:20:58,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:20:58,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:58,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:58,248 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:58,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 16:20:58,318 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:20:58,318 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:58,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 16:20:58,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 16:20:58,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 16:20:58,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288485483] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:58,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:58,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2024-10-24 16:20:58,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699511133] [2024-10-24 16:20:58,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:58,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 16:20:58,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:58,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 16:20:58,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2024-10-24 16:20:58,561 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 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) [2024-10-24 16:20:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:58,777 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2024-10-24 16:20:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 16:20:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 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 39 [2024-10-24 16:20:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:58,778 INFO L225 Difference]: With dead ends: 97 [2024-10-24 16:20:58,778 INFO L226 Difference]: Without dead ends: 97 [2024-10-24 16:20:58,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2024-10-24 16:20:58,779 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:58,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 41 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-24 16:20:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-10-24 16:20:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.2065217391304348) internal successors, (111), 96 states have internal predecessors, (111), 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) [2024-10-24 16:20:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2024-10-24 16:20:58,782 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 39 [2024-10-24 16:20:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:58,782 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2024-10-24 16:20:58,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 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) [2024-10-24 16:20:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2024-10-24 16:20:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-24 16:20:58,783 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:58,783 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 1, 1] [2024-10-24 16:20:58,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-24 16:20:58,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-24 16:20:58,984 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:58,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:58,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2042091972, now seen corresponding path program 3 times [2024-10-24 16:20:58,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:58,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360092182] [2024-10-24 16:20:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:58,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 193 proven. 51 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-24 16:20:59,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:59,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360092182] [2024-10-24 16:20:59,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360092182] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:59,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056563895] [2024-10-24 16:20:59,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:20:59,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:59,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:59,181 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:59,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 16:20:59,258 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-24 16:20:59,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:59,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 16:20:59,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 127 proven. 26 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-10-24 16:20:59,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 127 proven. 26 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-10-24 16:20:59,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056563895] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:59,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:59,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 21 [2024-10-24 16:20:59,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018958561] [2024-10-24 16:20:59,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:59,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 16:20:59,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:59,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 16:20:59,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-10-24 16:20:59,438 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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) [2024-10-24 16:21:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:00,037 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2024-10-24 16:21:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-24 16:21:00,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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 52 [2024-10-24 16:21:00,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:00,038 INFO L225 Difference]: With dead ends: 143 [2024-10-24 16:21:00,038 INFO L226 Difference]: Without dead ends: 143 [2024-10-24 16:21:00,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=1340, Unknown=0, NotChecked=0, Total=1722 [2024-10-24 16:21:00,039 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:00,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 83 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:21:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-24 16:21:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2024-10-24 16:21:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.3015873015873016) internal successors, (164), 130 states have internal predecessors, (164), 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) [2024-10-24 16:21:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 164 transitions. [2024-10-24 16:21:00,045 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 164 transitions. Word has length 52 [2024-10-24 16:21:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:00,045 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 164 transitions. [2024-10-24 16:21:00,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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) [2024-10-24 16:21:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 164 transitions. [2024-10-24 16:21:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-24 16:21:00,046 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:00,046 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 3, 3, 3, 1, 1] [2024-10-24 16:21:00,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 16:21:00,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-24 16:21:00,246 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:00,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash -39028783, now seen corresponding path program 1 times [2024-10-24 16:21:00,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:00,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121361118] [2024-10-24 16:21:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:00,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-10-24 16:21:00,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:00,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121361118] [2024-10-24 16:21:00,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121361118] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:00,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509783849] [2024-10-24 16:21:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:00,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:00,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:00,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:00,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 16:21:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:00,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-24 16:21:00,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:00,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-24 16:21:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-10-24 16:21:00,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-10-24 16:21:01,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509783849] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:01,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:01,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-10-24 16:21:01,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057247749] [2024-10-24 16:21:01,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:01,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 16:21:01,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:01,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 16:21:01,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-10-24 16:21:01,097 INFO L87 Difference]: Start difference. First operand 131 states and 164 transitions. Second operand has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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) [2024-10-24 16:21:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:01,394 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2024-10-24 16:21:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 16:21:01,395 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 56 [2024-10-24 16:21:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:01,396 INFO L225 Difference]: With dead ends: 145 [2024-10-24 16:21:01,396 INFO L226 Difference]: Without dead ends: 145 [2024-10-24 16:21:01,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2024-10-24 16:21:01,397 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:01,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 42 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:21:01,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-10-24 16:21:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2024-10-24 16:21:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.21875) internal successors, (156), 132 states have internal predecessors, (156), 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) [2024-10-24 16:21:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2024-10-24 16:21:01,401 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 56 [2024-10-24 16:21:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:01,402 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2024-10-24 16:21:01,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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) [2024-10-24 16:21:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2024-10-24 16:21:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-24 16:21:01,403 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:01,403 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:21:01,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-24 16:21:01,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:01,608 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:01,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1471376211, now seen corresponding path program 2 times [2024-10-24 16:21:01,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:01,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824111771] [2024-10-24 16:21:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:01,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 82 proven. 193 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-24 16:21:01,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:01,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824111771] [2024-10-24 16:21:01,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824111771] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:01,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109443038] [2024-10-24 16:21:01,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:21:01,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:01,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:01,887 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:01,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 16:21:01,960 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 16:21:01,960 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:01,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 16:21:01,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:02,550 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_17| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_26| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_17|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_17| 0)) (not (= |v_ULTIMATE.start_main_~#b~0#1.base_26| |v_ULTIMATE.start_main_~#mask~0#1.base_17|)) (<= 1 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| v_DerPreprocessor_1) |v_ULTIMATE.start_main_~#mask~0#1.base_17| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#b~0#1.base_26|)))) is different from true [2024-10-24 16:21:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2024-10-24 16:21:02,551 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:21:02,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109443038] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:21:02,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:21:02,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 13 [2024-10-24 16:21:02,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38493639] [2024-10-24 16:21:02,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:21:02,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:21:02,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:02,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:21:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=117, Unknown=1, NotChecked=22, Total=182 [2024-10-24 16:21:02,553 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-10-24 16:21:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:02,569 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2024-10-24 16:21:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:21:02,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 62 [2024-10-24 16:21:02,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:02,570 INFO L225 Difference]: With dead ends: 134 [2024-10-24 16:21:02,570 INFO L226 Difference]: Without dead ends: 133 [2024-10-24 16:21:02,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=117, Unknown=1, NotChecked=22, Total=182 [2024-10-24 16:21:02,571 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:02,571 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2024-10-24 16:21:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-24 16:21:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-10-24 16:21:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1875) internal successors, (152), 132 states have internal predecessors, (152), 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) [2024-10-24 16:21:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2024-10-24 16:21:02,573 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 62 [2024-10-24 16:21:02,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:02,573 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2024-10-24 16:21:02,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-10-24 16:21:02,573 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2024-10-24 16:21:02,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-24 16:21:02,574 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:02,574 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 16:21:02,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-24 16:21:02,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-10-24 16:21:02,779 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:02,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:02,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1631981054, now seen corresponding path program 1 times [2024-10-24 16:21:02,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:02,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531426456] [2024-10-24 16:21:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:02,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 82 proven. 193 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-24 16:21:03,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531426456] [2024-10-24 16:21:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531426456] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213751276] [2024-10-24 16:21:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:03,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:03,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:03,148 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:03,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 16:21:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:03,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 16:21:03,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 121 proven. 154 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-24 16:21:03,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 121 proven. 154 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-24 16:21:03,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213751276] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:03,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:03,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2024-10-24 16:21:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852346103] [2024-10-24 16:21:03,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:03,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 16:21:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 16:21:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2024-10-24 16:21:03,513 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 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) [2024-10-24 16:21:03,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:03,912 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2024-10-24 16:21:03,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-24 16:21:03,912 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 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 63 [2024-10-24 16:21:03,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:03,913 INFO L225 Difference]: With dead ends: 133 [2024-10-24 16:21:03,913 INFO L226 Difference]: Without dead ends: 133 [2024-10-24 16:21:03,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2024-10-24 16:21:03,914 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:03,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 21 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:21:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-24 16:21:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-10-24 16:21:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.171875) internal successors, (150), 132 states have internal predecessors, (150), 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) [2024-10-24 16:21:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2024-10-24 16:21:03,917 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 63 [2024-10-24 16:21:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:03,917 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2024-10-24 16:21:03,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 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) [2024-10-24 16:21:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2024-10-24 16:21:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-24 16:21:03,918 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:03,919 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 16:21:03,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-24 16:21:04,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:04,120 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:04,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:04,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1140904957, now seen corresponding path program 2 times [2024-10-24 16:21:04,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:04,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502137330] [2024-10-24 16:21:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 107 proven. 178 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-10-24 16:21:04,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:04,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502137330] [2024-10-24 16:21:04,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502137330] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:04,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249948538] [2024-10-24 16:21:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:21:04,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:04,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:04,467 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:04,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 16:21:04,578 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:21:04,578 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:04,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 16:21:04,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 27 proven. 183 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-10-24 16:21:04,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:04,963 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 24 treesize of output 20 [2024-10-24 16:21:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 27 proven. 183 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-10-24 16:21:05,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249948538] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:05,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:05,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2024-10-24 16:21:05,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986830407] [2024-10-24 16:21:05,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:05,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 16:21:05,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 16:21:05,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-10-24 16:21:05,040 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand has 21 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 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) [2024-10-24 16:21:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:05,281 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2024-10-24 16:21:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 16:21:05,282 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 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 66 [2024-10-24 16:21:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:05,282 INFO L225 Difference]: With dead ends: 136 [2024-10-24 16:21:05,282 INFO L226 Difference]: Without dead ends: 136 [2024-10-24 16:21:05,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2024-10-24 16:21:05,283 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 122 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:05,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 58 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:21:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-24 16:21:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2024-10-24 16:21:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 133 states have internal predecessors, (149), 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) [2024-10-24 16:21:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 149 transitions. [2024-10-24 16:21:05,286 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 149 transitions. Word has length 66 [2024-10-24 16:21:05,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:05,286 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 149 transitions. [2024-10-24 16:21:05,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 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) [2024-10-24 16:21:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 149 transitions. [2024-10-24 16:21:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-24 16:21:05,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:05,289 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 4, 3, 3, 3, 1, 1] [2024-10-24 16:21:05,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-24 16:21:05,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:05,489 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:05,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash 188687013, now seen corresponding path program 4 times [2024-10-24 16:21:05,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:05,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214162384] [2024-10-24 16:21:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:05,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 136 proven. 451 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-24 16:21:05,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:05,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214162384] [2024-10-24 16:21:05,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214162384] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:05,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980200549] [2024-10-24 16:21:05,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 16:21:05,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:05,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:05,870 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:05,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 16:21:05,973 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 16:21:05,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:05,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 16:21:05,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 164 proven. 423 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-24 16:21:06,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 164 proven. 423 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-24 16:21:06,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980200549] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:06,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:06,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2024-10-24 16:21:06,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425865879] [2024-10-24 16:21:06,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:06,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-24 16:21:06,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:06,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-24 16:21:06,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1205, Unknown=0, NotChecked=0, Total=1640 [2024-10-24 16:21:06,478 INFO L87 Difference]: Start difference. First operand 134 states and 149 transitions. Second operand has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 40 states have internal predecessors, (142), 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) [2024-10-24 16:21:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:07,304 INFO L93 Difference]: Finished difference Result 248 states and 285 transitions. [2024-10-24 16:21:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-10-24 16:21:07,305 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 40 states have internal predecessors, (142), 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 73 [2024-10-24 16:21:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:07,306 INFO L225 Difference]: With dead ends: 248 [2024-10-24 16:21:07,306 INFO L226 Difference]: Without dead ends: 248 [2024-10-24 16:21:07,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2343, Invalid=6969, Unknown=0, NotChecked=0, Total=9312 [2024-10-24 16:21:07,309 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:07,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 38 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:21:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-10-24 16:21:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2024-10-24 16:21:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.144736842105263) internal successors, (261), 232 states have internal predecessors, (261), 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) [2024-10-24 16:21:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 261 transitions. [2024-10-24 16:21:07,313 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 261 transitions. Word has length 73 [2024-10-24 16:21:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:07,313 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 261 transitions. [2024-10-24 16:21:07,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 40 states have internal predecessors, (142), 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) [2024-10-24 16:21:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 261 transitions. [2024-10-24 16:21:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-24 16:21:07,314 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:07,314 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2024-10-24 16:21:07,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-24 16:21:07,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-24 16:21:07,519 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:07,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:07,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1386923923, now seen corresponding path program 3 times [2024-10-24 16:21:07,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:07,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628817749] [2024-10-24 16:21:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:07,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-24 16:21:07,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:07,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628817749] [2024-10-24 16:21:07,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628817749] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:07,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340449965] [2024-10-24 16:21:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:21:07,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:07,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:07,662 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:07,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 16:21:07,751 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 16:21:07,751 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:07,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 16:21:07,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:07,765 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 18 treesize of output 16 [2024-10-24 16:21:07,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-10-24 16:21:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-10-24 16:21:07,974 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:21:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340449965] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:21:07,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:21:07,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2024-10-24 16:21:07,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882188029] [2024-10-24 16:21:07,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:21:07,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:21:07,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:07,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:21:07,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:21:07,976 INFO L87 Difference]: Start difference. First operand 233 states and 261 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2024-10-24 16:21:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:08,013 INFO L93 Difference]: Finished difference Result 231 states and 256 transitions. [2024-10-24 16:21:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:21:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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) Word has length 75 [2024-10-24 16:21:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:08,014 INFO L225 Difference]: With dead ends: 231 [2024-10-24 16:21:08,014 INFO L226 Difference]: Without dead ends: 231 [2024-10-24 16:21:08,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:21:08,015 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:08,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:21:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-10-24 16:21:08,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2024-10-24 16:21:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 227 states have (on average 1.1233480176211454) internal successors, (255), 229 states have internal predecessors, (255), 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) [2024-10-24 16:21:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 255 transitions. [2024-10-24 16:21:08,023 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 255 transitions. Word has length 75 [2024-10-24 16:21:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:08,023 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 255 transitions. [2024-10-24 16:21:08,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2024-10-24 16:21:08,024 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 255 transitions. [2024-10-24 16:21:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-24 16:21:08,024 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:08,024 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-10-24 16:21:08,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-24 16:21:08,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:08,225 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:08,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash -44970104, now seen corresponding path program 1 times [2024-10-24 16:21:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:08,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866551456] [2024-10-24 16:21:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:08,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-10-24 16:21:08,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:08,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866551456] [2024-10-24 16:21:08,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866551456] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:08,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780085951] [2024-10-24 16:21:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:08,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:08,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:08,450 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:08,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 16:21:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:08,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-24 16:21:08,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-24 16:21:08,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 9 proven. 309 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-24 16:21:08,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780085951] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:08,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:08,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 23 [2024-10-24 16:21:08,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614482541] [2024-10-24 16:21:08,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:08,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 16:21:08,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 16:21:08,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2024-10-24 16:21:08,967 INFO L87 Difference]: Start difference. First operand 230 states and 255 transitions. Second operand has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 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) [2024-10-24 16:21:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:09,281 INFO L93 Difference]: Finished difference Result 289 states and 316 transitions. [2024-10-24 16:21:09,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 16:21:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 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 76 [2024-10-24 16:21:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:09,282 INFO L225 Difference]: With dead ends: 289 [2024-10-24 16:21:09,282 INFO L226 Difference]: Without dead ends: 289 [2024-10-24 16:21:09,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=473, Unknown=0, NotChecked=0, Total=756 [2024-10-24 16:21:09,283 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 129 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:09,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 105 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:21:09,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-10-24 16:21:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2024-10-24 16:21:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 284 states have (on average 1.1126760563380282) internal successors, (316), 286 states have internal predecessors, (316), 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) [2024-10-24 16:21:09,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 316 transitions. [2024-10-24 16:21:09,287 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 316 transitions. Word has length 76 [2024-10-24 16:21:09,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:09,287 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 316 transitions. [2024-10-24 16:21:09,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 23 states have internal predecessors, (101), 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) [2024-10-24 16:21:09,288 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 316 transitions. [2024-10-24 16:21:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-10-24 16:21:09,288 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:09,288 INFO L215 NwaCegarLoop]: trace histogram [45, 44, 44, 9, 8, 8, 8, 1, 1] [2024-10-24 16:21:09,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-24 16:21:09,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:09,493 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:09,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1651012573, now seen corresponding path program 5 times [2024-10-24 16:21:09,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:09,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825287694] [2024-10-24 16:21:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:09,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 2063 proven. 144 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2024-10-24 16:21:09,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:09,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825287694] [2024-10-24 16:21:09,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825287694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:09,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650217425] [2024-10-24 16:21:09,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 16:21:09,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:09,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:09,966 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:09,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 16:21:10,150 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-10-24 16:21:10,150 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:10,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 16:21:10,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 2021 proven. 255 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2024-10-24 16:21:10,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 2085 proven. 191 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2024-10-24 16:21:10,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650217425] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:10,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:10,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 32 [2024-10-24 16:21:10,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259754019] [2024-10-24 16:21:10,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:10,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-24 16:21:10,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:10,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-24 16:21:10,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2024-10-24 16:21:10,526 INFO L87 Difference]: Start difference. First operand 287 states and 316 transitions. Second operand has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:21:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:10,931 INFO L93 Difference]: Finished difference Result 287 states and 310 transitions. [2024-10-24 16:21:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-24 16:21:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2024-10-24 16:21:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:10,933 INFO L225 Difference]: With dead ends: 287 [2024-10-24 16:21:10,933 INFO L226 Difference]: Without dead ends: 287 [2024-10-24 16:21:10,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 313 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=2047, Unknown=0, NotChecked=0, Total=2652 [2024-10-24 16:21:10,934 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:10,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 29 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:21:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-10-24 16:21:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2024-10-24 16:21:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 284 states have (on average 1.091549295774648) internal successors, (310), 286 states have internal predecessors, (310), 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) [2024-10-24 16:21:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 310 transitions. [2024-10-24 16:21:10,939 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 310 transitions. Word has length 168 [2024-10-24 16:21:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:10,940 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 310 transitions. [2024-10-24 16:21:10,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:21:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 310 transitions. [2024-10-24 16:21:10,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-10-24 16:21:10,941 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:10,941 INFO L215 NwaCegarLoop]: trace histogram [49, 48, 48, 9, 8, 8, 8, 1, 1] [2024-10-24 16:21:10,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-24 16:21:11,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:11,142 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:11,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1380156551, now seen corresponding path program 6 times [2024-10-24 16:21:11,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:11,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179501217] [2024-10-24 16:21:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:11,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3992 backedges. 2465 proven. 939 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2024-10-24 16:21:11,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:11,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179501217] [2024-10-24 16:21:11,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179501217] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:11,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440506371] [2024-10-24 16:21:11,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 16:21:11,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:11,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:11,807 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:11,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-24 16:21:12,157 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-10-24 16:21:12,157 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:12,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 16:21:12,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3992 backedges. 679 proven. 1375 refuted. 0 times theorem prover too weak. 1938 trivial. 0 not checked. [2024-10-24 16:21:12,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3992 backedges. 0 proven. 2054 refuted. 0 times theorem prover too weak. 1938 trivial. 0 not checked. [2024-10-24 16:21:13,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440506371] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:13,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:13,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 44 [2024-10-24 16:21:13,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679067040] [2024-10-24 16:21:13,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:13,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-24 16:21:13,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:13,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-24 16:21:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2024-10-24 16:21:13,483 INFO L87 Difference]: Start difference. First operand 287 states and 310 transitions. Second operand has 45 states, 45 states have (on average 3.2222222222222223) internal successors, (145), 44 states have internal predecessors, (145), 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) [2024-10-24 16:21:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:17,611 INFO L93 Difference]: Finished difference Result 423 states and 472 transitions. [2024-10-24 16:21:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-10-24 16:21:17,612 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2222222222222223) internal successors, (145), 44 states have internal predecessors, (145), 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 180 [2024-10-24 16:21:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:17,613 INFO L225 Difference]: With dead ends: 423 [2024-10-24 16:21:17,613 INFO L226 Difference]: Without dead ends: 423 [2024-10-24 16:21:17,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6813 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4044, Invalid=19212, Unknown=0, NotChecked=0, Total=23256 [2024-10-24 16:21:17,618 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 520 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:17,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 39 Invalid, 2280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-24 16:21:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-10-24 16:21:17,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 356. [2024-10-24 16:21:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 353 states have (on average 1.141643059490085) internal successors, (403), 355 states have internal predecessors, (403), 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) [2024-10-24 16:21:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 403 transitions. [2024-10-24 16:21:17,622 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 403 transitions. Word has length 180 [2024-10-24 16:21:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:17,623 INFO L471 AbstractCegarLoop]: Abstraction has 356 states and 403 transitions. [2024-10-24 16:21:17,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2222222222222223) internal successors, (145), 44 states have internal predecessors, (145), 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) [2024-10-24 16:21:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 403 transitions. [2024-10-24 16:21:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-10-24 16:21:17,624 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:17,624 INFO L215 NwaCegarLoop]: trace histogram [52, 52, 51, 9, 8, 8, 8, 1, 1] [2024-10-24 16:21:17,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-24 16:21:17,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-24 16:21:17,828 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:17,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash -507505494, now seen corresponding path program 2 times [2024-10-24 16:21:17,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:17,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812557426] [2024-10-24 16:21:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:17,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4514 backedges. 3052 proven. 267 refuted. 0 times theorem prover too weak. 1195 trivial. 0 not checked. [2024-10-24 16:21:18,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:18,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812557426] [2024-10-24 16:21:18,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812557426] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:18,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594432592] [2024-10-24 16:21:18,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:21:18,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:18,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:18,383 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:18,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-24 16:21:18,570 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:21:18,571 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:18,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 16:21:18,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4514 backedges. 3127 proven. 712 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2024-10-24 16:21:18,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4514 backedges. 3127 proven. 712 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2024-10-24 16:21:19,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594432592] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:19,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:19,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 34 [2024-10-24 16:21:19,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636348603] [2024-10-24 16:21:19,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:19,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 16:21:19,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:19,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 16:21:19,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 16:21:19,090 INFO L87 Difference]: Start difference. First operand 356 states and 403 transitions. Second operand has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 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) [2024-10-24 16:21:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:20,014 INFO L93 Difference]: Finished difference Result 386 states and 428 transitions. [2024-10-24 16:21:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-10-24 16:21:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 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 190 [2024-10-24 16:21:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:20,016 INFO L225 Difference]: With dead ends: 386 [2024-10-24 16:21:20,016 INFO L226 Difference]: Without dead ends: 386 [2024-10-24 16:21:20,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 353 SyntacticMatches, 13 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2024-10-24 16:21:20,019 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:20,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 24 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:21:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2024-10-24 16:21:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 381. [2024-10-24 16:21:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 378 states have (on average 1.119047619047619) internal successors, (423), 380 states have internal predecessors, (423), 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) [2024-10-24 16:21:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 423 transitions. [2024-10-24 16:21:20,023 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 423 transitions. Word has length 190 [2024-10-24 16:21:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:20,024 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 423 transitions. [2024-10-24 16:21:20,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 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) [2024-10-24 16:21:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 423 transitions. [2024-10-24 16:21:20,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-10-24 16:21:20,025 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:20,025 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 53, 9, 8, 8, 8, 1, 1] [2024-10-24 16:21:20,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-24 16:21:20,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-24 16:21:20,226 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:20,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:20,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1971090808, now seen corresponding path program 3 times [2024-10-24 16:21:20,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:20,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275445314] [2024-10-24 16:21:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:20,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 3116 proven. 1201 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-10-24 16:21:20,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:20,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275445314] [2024-10-24 16:21:20,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275445314] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:20,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812965818] [2024-10-24 16:21:20,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:21:20,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:20,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:20,976 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:20,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-24 16:21:21,098 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 16:21:21,098 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:21,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 16:21:21,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:21,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-24 16:21:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:21:21,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-10-24 16:21:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 30 proven. 1507 refuted. 0 times theorem prover too weak. 3308 trivial. 0 not checked. [2024-10-24 16:21:21,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 1537 refuted. 0 times theorem prover too weak. 3308 trivial. 0 not checked. [2024-10-24 16:21:22,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812965818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:22,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:22,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 4, 4] total 30 [2024-10-24 16:21:22,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017810459] [2024-10-24 16:21:22,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:22,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-24 16:21:22,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:22,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-24 16:21:22,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-10-24 16:21:22,356 INFO L87 Difference]: Start difference. First operand 381 states and 423 transitions. Second operand has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:21:24,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:24,306 INFO L93 Difference]: Finished difference Result 380 states and 407 transitions. [2024-10-24 16:21:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-10-24 16:21:24,306 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2024-10-24 16:21:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:24,307 INFO L225 Difference]: With dead ends: 380 [2024-10-24 16:21:24,307 INFO L226 Difference]: Without dead ends: 380 [2024-10-24 16:21:24,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2886 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2754, Invalid=8802, Unknown=0, NotChecked=0, Total=11556 [2024-10-24 16:21:24,309 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 55 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:24,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 24 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:21:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2024-10-24 16:21:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2024-10-24 16:21:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 378 states have (on average 1.0767195767195767) internal successors, (407), 379 states have internal predecessors, (407), 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) [2024-10-24 16:21:24,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 407 transitions. [2024-10-24 16:21:24,314 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 407 transitions. Word has length 196 [2024-10-24 16:21:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:24,314 INFO L471 AbstractCegarLoop]: Abstraction has 380 states and 407 transitions. [2024-10-24 16:21:24,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:21:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 407 transitions. [2024-10-24 16:21:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2024-10-24 16:21:24,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:24,316 INFO L215 NwaCegarLoop]: trace histogram [69, 68, 68, 10, 9, 9, 9, 1, 1] [2024-10-24 16:21:24,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-24 16:21:24,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-24 16:21:24,519 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:24,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:24,520 INFO L85 PathProgramCache]: Analyzing trace with hash -54111204, now seen corresponding path program 7 times [2024-10-24 16:21:24,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:24,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697715859] [2024-10-24 16:21:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:24,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 4908 proven. 528 refuted. 0 times theorem prover too weak. 2308 trivial. 0 not checked. [2024-10-24 16:21:25,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:25,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697715859] [2024-10-24 16:21:25,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697715859] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:25,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094945962] [2024-10-24 16:21:25,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 16:21:25,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:25,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:25,492 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:25,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-24 16:21:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:25,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-24 16:21:25,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2681 proven. 4358 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2024-10-24 16:21:26,121 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2681 proven. 4358 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2024-10-24 16:21:26,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094945962] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:26,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:26,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 21] total 47 [2024-10-24 16:21:26,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24819008] [2024-10-24 16:21:26,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:26,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-24 16:21:26,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:26,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-24 16:21:26,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1776, Unknown=0, NotChecked=0, Total=2162 [2024-10-24 16:21:26,497 INFO L87 Difference]: Start difference. First operand 380 states and 407 transitions. Second operand has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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) [2024-10-24 16:21:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:27,576 INFO L93 Difference]: Finished difference Result 367 states and 387 transitions. [2024-10-24 16:21:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-10-24 16:21:27,577 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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 244 [2024-10-24 16:21:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:27,578 INFO L225 Difference]: With dead ends: 367 [2024-10-24 16:21:27,578 INFO L226 Difference]: Without dead ends: 367 [2024-10-24 16:21:27,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 450 SyntacticMatches, 19 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2135, Invalid=9855, Unknown=0, NotChecked=0, Total=11990 [2024-10-24 16:21:27,580 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:27,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 29 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:21:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-10-24 16:21:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2024-10-24 16:21:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 363 states have (on average 1.0606060606060606) internal successors, (385), 364 states have internal predecessors, (385), 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) [2024-10-24 16:21:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 385 transitions. [2024-10-24 16:21:27,585 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 385 transitions. Word has length 244 [2024-10-24 16:21:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:27,585 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 385 transitions. [2024-10-24 16:21:27,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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) [2024-10-24 16:21:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 385 transitions. [2024-10-24 16:21:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2024-10-24 16:21:27,586 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:27,586 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 62, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-10-24 16:21:27,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-24 16:21:27,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:27,787 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:27,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:27,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1164265240, now seen corresponding path program 2 times [2024-10-24 16:21:27,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:27,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678110253] [2024-10-24 16:21:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:27,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6628 backedges. 4135 proven. 1835 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2024-10-24 16:21:28,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:28,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678110253] [2024-10-24 16:21:28,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678110253] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:28,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578210055] [2024-10-24 16:21:28,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:21:28,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:28,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:28,816 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:28,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-24 16:21:28,940 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 16:21:28,940 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:28,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 16:21:28,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:30,113 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_18| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_27| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_18|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27|) 0) (= (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27| v_DerPreprocessor_3) |v_ULTIMATE.start_main_~#mask~0#1.base_18| v_DerPreprocessor_4) |v_ULTIMATE.start_main_~#b~0#1.base_27|) v_DerPreprocessor_3) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_18| 0)))) is different from true [2024-10-24 16:21:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6628 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6618 trivial. 0 not checked. [2024-10-24 16:21:30,115 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:21:30,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578210055] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:21:30,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:21:30,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [25] total 28 [2024-10-24 16:21:30,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20177856] [2024-10-24 16:21:30,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:21:30,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:21:30,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:21:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=553, Unknown=1, NotChecked=50, Total=756 [2024-10-24 16:21:30,117 INFO L87 Difference]: Start difference. First operand 365 states and 385 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2024-10-24 16:21:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:30,138 INFO L93 Difference]: Finished difference Result 364 states and 384 transitions. [2024-10-24 16:21:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:21:30,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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) Word has length 262 [2024-10-24 16:21:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:30,139 INFO L225 Difference]: With dead ends: 364 [2024-10-24 16:21:30,140 INFO L226 Difference]: Without dead ends: 330 [2024-10-24 16:21:30,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=553, Unknown=1, NotChecked=50, Total=756 [2024-10-24 16:21:30,140 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:30,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2024-10-24 16:21:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-10-24 16:21:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 290. [2024-10-24 16:21:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0588235294117647) internal successors, (306), 289 states have internal predecessors, (306), 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) [2024-10-24 16:21:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 306 transitions. [2024-10-24 16:21:30,148 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 306 transitions. Word has length 262 [2024-10-24 16:21:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:30,148 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 306 transitions. [2024-10-24 16:21:30,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2024-10-24 16:21:30,148 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 306 transitions. [2024-10-24 16:21:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2024-10-24 16:21:30,149 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:30,149 INFO L215 NwaCegarLoop]: trace histogram [79, 78, 78, 11, 10, 10, 10, 1, 1] [2024-10-24 16:21:30,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-24 16:21:30,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:30,350 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:30,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:30,350 INFO L85 PathProgramCache]: Analyzing trace with hash 350345397, now seen corresponding path program 8 times [2024-10-24 16:21:30,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:30,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394309587] [2024-10-24 16:21:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:30,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10145 backedges. 4603 proven. 4730 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2024-10-24 16:21:31,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:31,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394309587] [2024-10-24 16:21:31,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394309587] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:31,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640963254] [2024-10-24 16:21:31,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:21:31,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:31,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:31,651 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:31,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-24 16:21:31,944 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:21:31,944 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:31,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-24 16:21:31,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10145 backedges. 3009 proven. 6327 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2024-10-24 16:21:32,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10145 backedges. 3009 proven. 6327 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2024-10-24 16:21:32,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640963254] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:32,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23, 23] total 58 [2024-10-24 16:21:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553975477] [2024-10-24 16:21:32,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:32,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-24 16:21:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-24 16:21:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=2725, Unknown=0, NotChecked=0, Total=3306 [2024-10-24 16:21:32,918 INFO L87 Difference]: Start difference. First operand 290 states and 306 transitions. Second operand has 58 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 58 states have internal predecessors, (218), 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) [2024-10-24 16:21:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:34,356 INFO L93 Difference]: Finished difference Result 399 states and 419 transitions. [2024-10-24 16:21:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-10-24 16:21:34,357 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 58 states have internal predecessors, (218), 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 278 [2024-10-24 16:21:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:34,358 INFO L225 Difference]: With dead ends: 399 [2024-10-24 16:21:34,358 INFO L226 Difference]: Without dead ends: 399 [2024-10-24 16:21:34,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 522 SyntacticMatches, 10 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5514 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3165, Invalid=14127, Unknown=0, NotChecked=0, Total=17292 [2024-10-24 16:21:34,363 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:34,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 7 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:21:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-10-24 16:21:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 358. [2024-10-24 16:21:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.0560224089635855) internal successors, (377), 357 states have internal predecessors, (377), 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) [2024-10-24 16:21:34,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 377 transitions. [2024-10-24 16:21:34,369 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 377 transitions. Word has length 278 [2024-10-24 16:21:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:34,370 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 377 transitions. [2024-10-24 16:21:34,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 58 states have internal predecessors, (218), 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) [2024-10-24 16:21:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 377 transitions. [2024-10-24 16:21:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2024-10-24 16:21:34,371 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:34,371 INFO L215 NwaCegarLoop]: trace histogram [88, 87, 87, 12, 11, 11, 11, 1, 1] [2024-10-24 16:21:34,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-24 16:21:34,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-24 16:21:34,572 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:34,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:34,572 INFO L85 PathProgramCache]: Analyzing trace with hash -171034505, now seen corresponding path program 9 times [2024-10-24 16:21:34,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:34,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273582204] [2024-10-24 16:21:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:34,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12596 backedges. 8224 proven. 420 refuted. 0 times theorem prover too weak. 3952 trivial. 0 not checked. [2024-10-24 16:21:35,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:35,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273582204] [2024-10-24 16:21:35,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273582204] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:35,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575760277] [2024-10-24 16:21:35,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:21:35,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:35,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:35,455 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:35,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-24 16:21:35,719 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-24 16:21:35,719 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:35,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-24 16:21:35,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12596 backedges. 2585 proven. 155 refuted. 0 times theorem prover too weak. 9856 trivial. 0 not checked. [2024-10-24 16:21:35,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12596 backedges. 2585 proven. 155 refuted. 0 times theorem prover too weak. 9856 trivial. 0 not checked. [2024-10-24 16:21:36,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575760277] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:36,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:36,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 45 [2024-10-24 16:21:36,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900437785] [2024-10-24 16:21:36,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:36,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-24 16:21:36,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-24 16:21:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2024-10-24 16:21:36,164 INFO L87 Difference]: Start difference. First operand 358 states and 377 transitions. Second operand has 45 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 45 states have internal predecessors, (142), 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) [2024-10-24 16:21:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:44,116 INFO L93 Difference]: Finished difference Result 388 states and 415 transitions. [2024-10-24 16:21:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-10-24 16:21:44,117 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 45 states have internal predecessors, (142), 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 309 [2024-10-24 16:21:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:44,118 INFO L225 Difference]: With dead ends: 388 [2024-10-24 16:21:44,118 INFO L226 Difference]: Without dead ends: 388 [2024-10-24 16:21:44,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1480, Invalid=6530, Unknown=0, NotChecked=0, Total=8010 [2024-10-24 16:21:44,119 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 283 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:44,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:21:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2024-10-24 16:21:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 352. [2024-10-24 16:21:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.056980056980057) internal successors, (371), 351 states have internal predecessors, (371), 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) [2024-10-24 16:21:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 371 transitions. [2024-10-24 16:21:44,123 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 371 transitions. Word has length 309 [2024-10-24 16:21:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:44,123 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 371 transitions. [2024-10-24 16:21:44,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 45 states have internal predecessors, (142), 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) [2024-10-24 16:21:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 371 transitions. [2024-10-24 16:21:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2024-10-24 16:21:44,125 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:44,125 INFO L215 NwaCegarLoop]: trace histogram [101, 100, 100, 12, 11, 11, 11, 1, 1] [2024-10-24 16:21:44,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-24 16:21:44,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-24 16:21:44,325 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:44,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:44,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1843147214, now seen corresponding path program 10 times [2024-10-24 16:21:44,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:44,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471767417] [2024-10-24 16:21:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:44,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:21:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16392 backedges. 11329 proven. 1518 refuted. 0 times theorem prover too weak. 3545 trivial. 0 not checked. [2024-10-24 16:21:45,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:21:45,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471767417] [2024-10-24 16:21:45,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471767417] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:21:45,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113080966] [2024-10-24 16:21:45,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 16:21:45,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:45,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:21:45,345 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:21:45,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-24 16:21:45,874 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 16:21:45,874 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:21:45,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-24 16:21:45,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:21:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16392 backedges. 815 proven. 14596 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2024-10-24 16:21:46,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:21:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16392 backedges. 815 proven. 14596 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2024-10-24 16:21:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113080966] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:21:47,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:21:47,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 36, 36] total 94 [2024-10-24 16:21:47,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139365687] [2024-10-24 16:21:47,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:21:47,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-10-24 16:21:47,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:21:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-10-24 16:21:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1426, Invalid=7316, Unknown=0, NotChecked=0, Total=8742 [2024-10-24 16:21:47,941 INFO L87 Difference]: Start difference. First operand 352 states and 371 transitions. Second operand has 94 states, 94 states have (on average 3.9148936170212765) internal successors, (368), 94 states have internal predecessors, (368), 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) [2024-10-24 16:21:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:21:59,228 INFO L93 Difference]: Finished difference Result 1437 states and 1579 transitions. [2024-10-24 16:21:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2024-10-24 16:21:59,228 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.9148936170212765) internal successors, (368), 94 states have internal predecessors, (368), 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 348 [2024-10-24 16:21:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:21:59,231 INFO L225 Difference]: With dead ends: 1437 [2024-10-24 16:21:59,231 INFO L226 Difference]: Without dead ends: 1437 [2024-10-24 16:21:59,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1123 GetRequests, 626 SyntacticMatches, 3 SemanticMatches, 494 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98925 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=28946, Invalid=216574, Unknown=0, NotChecked=0, Total=245520 [2024-10-24 16:21:59,240 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 700 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3487 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:21:59,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 0 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3487 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-24 16:21:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2024-10-24 16:21:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 957. [2024-10-24 16:21:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 1.0868200836820083) internal successors, (1039), 956 states have internal predecessors, (1039), 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) [2024-10-24 16:21:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1039 transitions. [2024-10-24 16:21:59,253 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1039 transitions. Word has length 348 [2024-10-24 16:21:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:21:59,253 INFO L471 AbstractCegarLoop]: Abstraction has 957 states and 1039 transitions. [2024-10-24 16:21:59,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.9148936170212765) internal successors, (368), 94 states have internal predecessors, (368), 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) [2024-10-24 16:21:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1039 transitions. [2024-10-24 16:21:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2024-10-24 16:21:59,257 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:21:59,257 INFO L215 NwaCegarLoop]: trace histogram [212, 211, 211, 22, 21, 21, 21, 1, 1] [2024-10-24 16:21:59,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-24 16:21:59,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:21:59,458 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:21:59,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:21:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash -928786107, now seen corresponding path program 11 times [2024-10-24 16:21:59,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:21:59,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173896007] [2024-10-24 16:21:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:21:59,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:21:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:22:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 72200 backedges. 37678 proven. 615 refuted. 0 times theorem prover too weak. 33907 trivial. 0 not checked. [2024-10-24 16:22:01,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:22:01,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173896007] [2024-10-24 16:22:01,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173896007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:22:01,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388141388] [2024-10-24 16:22:01,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 16:22:01,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:22:01,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:22:01,606 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:22:01,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-24 16:22:02,622 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2024-10-24 16:22:02,622 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:22:02,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 16:22:02,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:22:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 72200 backedges. 37700 proven. 593 refuted. 0 times theorem prover too weak. 33907 trivial. 0 not checked. [2024-10-24 16:22:03,149 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:22:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 72200 backedges. 37731 proven. 562 refuted. 0 times theorem prover too weak. 33907 trivial. 0 not checked. [2024-10-24 16:22:03,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388141388] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:22:03,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:22:03,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 73 [2024-10-24 16:22:03,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897197056] [2024-10-24 16:22:03,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:22:03,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-10-24 16:22:03,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:22:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-10-24 16:22:03,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=890, Invalid=4366, Unknown=0, NotChecked=0, Total=5256 [2024-10-24 16:22:03,786 INFO L87 Difference]: Start difference. First operand 957 states and 1039 transitions. Second operand has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 73 states have internal predecessors, (222), 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) [2024-10-24 16:22:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:22:04,463 INFO L93 Difference]: Finished difference Result 957 states and 1026 transitions. [2024-10-24 16:22:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-24 16:22:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 73 states have internal predecessors, (222), 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 721 [2024-10-24 16:22:04,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:22:04,466 INFO L225 Difference]: With dead ends: 957 [2024-10-24 16:22:04,466 INFO L226 Difference]: Without dead ends: 957 [2024-10-24 16:22:04,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1492 GetRequests, 1394 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1856, Invalid=7650, Unknown=0, NotChecked=0, Total=9506 [2024-10-24 16:22:04,468 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:22:04,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:22:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2024-10-24 16:22:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2024-10-24 16:22:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 1.0732217573221758) internal successors, (1026), 956 states have internal predecessors, (1026), 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) [2024-10-24 16:22:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1026 transitions. [2024-10-24 16:22:04,477 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1026 transitions. Word has length 721 [2024-10-24 16:22:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:22:04,477 INFO L471 AbstractCegarLoop]: Abstraction has 957 states and 1026 transitions. [2024-10-24 16:22:04,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 73 states have internal predecessors, (222), 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) [2024-10-24 16:22:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1026 transitions. [2024-10-24 16:22:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2024-10-24 16:22:04,481 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:22:04,481 INFO L215 NwaCegarLoop]: trace histogram [222, 221, 221, 22, 21, 21, 21, 1, 1] [2024-10-24 16:22:04,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-24 16:22:04,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:22:04,682 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:22:04,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:22:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash 515726079, now seen corresponding path program 12 times [2024-10-24 16:22:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:22:04,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646289494] [2024-10-24 16:22:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:22:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:22:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:22:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 78895 backedges. 44660 proven. 1523 refuted. 0 times theorem prover too weak. 32712 trivial. 0 not checked. [2024-10-24 16:22:06,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:22:06,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646289494] [2024-10-24 16:22:06,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646289494] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:22:06,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492158629] [2024-10-24 16:22:06,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 16:22:06,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:22:06,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:22:06,943 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:22:06,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-24 16:22:08,639 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-10-24 16:22:08,640 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:22:08,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-24 16:22:08,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:22:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 78895 backedges. 8316 proven. 14346 refuted. 0 times theorem prover too weak. 56233 trivial. 0 not checked. [2024-10-24 16:22:09,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:22:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 78895 backedges. 0 proven. 22662 refuted. 0 times theorem prover too weak. 56233 trivial. 0 not checked. [2024-10-24 16:22:11,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492158629] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:22:11,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:22:11,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21, 21] total 72 [2024-10-24 16:22:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935191859] [2024-10-24 16:22:11,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:22:11,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-10-24 16:22:11,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:22:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-10-24 16:22:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=894, Invalid=4218, Unknown=0, NotChecked=0, Total=5112 [2024-10-24 16:22:11,389 INFO L87 Difference]: Start difference. First operand 957 states and 1026 transitions. Second operand has 72 states, 72 states have (on average 3.0555555555555554) internal successors, (220), 72 states have internal predecessors, (220), 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)