./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 17:45:34,176 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 17:45:34,252 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 17:45:34,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 17:45:34,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 17:45:34,291 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 17:45:34,292 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 17:45:34,292 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 17:45:34,293 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 17:45:34,294 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 17:45:34,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 17:45:34,295 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 17:45:34,295 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 17:45:34,297 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 17:45:34,297 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 17:45:34,298 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 17:45:34,298 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 17:45:34,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 17:45:34,299 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 17:45:34,299 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 17:45:34,299 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 17:45:34,303 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 17:45:34,303 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 17:45:34,303 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 17:45:34,303 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 17:45:34,304 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 17:45:34,304 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 17:45:34,304 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 17:45:34,304 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 17:45:34,305 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 17:45:34,305 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 17:45:34,305 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 17:45:34,305 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 17:45:34,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:45:34,306 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 17:45:34,307 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 17:45:34,307 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 17:45:34,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 17:45:34,308 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 17:45:34,308 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 17:45:34,309 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 17:45:34,309 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 17:45:34,309 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a [2024-10-14 17:45:34,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 17:45:34,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 17:45:34,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 17:45:34,579 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 17:45:34,580 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 17:45:34,581 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2024-10-14 17:45:36,011 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 17:45:36,234 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 17:45:36,235 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2024-10-14 17:45:36,248 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbb9ebec2/fe00e21951224435aa611e6ff8c3a006/FLAGbb17cff0e [2024-10-14 17:45:36,262 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbb9ebec2/fe00e21951224435aa611e6ff8c3a006 [2024-10-14 17:45:36,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 17:45:36,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 17:45:36,266 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 17:45:36,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 17:45:36,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 17:45:36,271 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700e43dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36, skipping insertion in model container [2024-10-14 17:45:36,272 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,319 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 17:45:36,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:45:36,592 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 17:45:36,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:45:36,686 INFO L204 MainTranslator]: Completed translation [2024-10-14 17:45:36,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36 WrapperNode [2024-10-14 17:45:36,686 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 17:45:36,687 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 17:45:36,688 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 17:45:36,688 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 17:45:36,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,739 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2024-10-14 17:45:36,740 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 17:45:36,741 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 17:45:36,741 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 17:45:36,741 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 17:45:36,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,755 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,767 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [4, 4]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 6 writes are split as follows [2, 4]. [2024-10-14 17:45:36,767 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,767 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,774 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,782 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 17:45:36,791 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 17:45:36,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 17:45:36,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 17:45:36,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (1/1) ... [2024-10-14 17:45:36,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:45:36,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:36,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 17:45:36,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 17:45:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 17:45:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 17:45:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 17:45:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 17:45:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 17:45:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 17:45:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 17:45:36,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 17:45:36,954 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 17:45:36,956 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 17:45:37,149 INFO L? ?]: Removed 67 outVars from TransFormulas that were not future-live. [2024-10-14 17:45:37,149 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 17:45:37,202 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 17:45:37,203 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 17:45:37,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:45:37 BoogieIcfgContainer [2024-10-14 17:45:37,203 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 17:45:37,210 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 17:45:37,210 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 17:45:37,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 17:45:37,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:45:36" (1/3) ... [2024-10-14 17:45:37,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4688b165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:45:37, skipping insertion in model container [2024-10-14 17:45:37,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:45:36" (2/3) ... [2024-10-14 17:45:37,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4688b165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:45:37, skipping insertion in model container [2024-10-14 17:45:37,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:45:37" (3/3) ... [2024-10-14 17:45:37,233 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-1.i [2024-10-14 17:45:37,250 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 17:45:37,251 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2024-10-14 17:45:37,295 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 17:45:37,304 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;@74989ac5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 17:45:37,305 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-10-14 17:45:37,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:45:37,320 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:37,321 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:45:37,322 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:37,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:37,329 INFO L85 PathProgramCache]: Analyzing trace with hash 347915625, now seen corresponding path program 1 times [2024-10-14 17:45:37,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:37,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705300756] [2024-10-14 17:45:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:37,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:37,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:37,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705300756] [2024-10-14 17:45:37,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705300756] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:37,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:37,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:45:37,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589926933] [2024-10-14 17:45:37,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:37,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:45:37,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:37,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:45:37,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:37,610 INFO L87 Difference]: Start difference. First operand has 44 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:37,671 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-10-14 17:45:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:45:37,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2024-10-14 17:45:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:37,680 INFO L225 Difference]: With dead ends: 58 [2024-10-14 17:45:37,680 INFO L226 Difference]: Without dead ends: 57 [2024-10-14 17:45:37,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:37,684 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:37,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 96 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:37,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-14 17:45:37,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2024-10-14 17:45:37,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2024-10-14 17:45:37,709 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 6 [2024-10-14 17:45:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:37,710 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2024-10-14 17:45:37,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2024-10-14 17:45:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:45:37,711 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:37,711 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:45:37,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 17:45:37,712 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:37,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash 349762667, now seen corresponding path program 1 times [2024-10-14 17:45:37,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:37,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667885685] [2024-10-14 17:45:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:37,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:37,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667885685] [2024-10-14 17:45:37,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667885685] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:37,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:37,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:45:37,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450861644] [2024-10-14 17:45:37,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:37,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:45:37,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:37,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:45:37,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:45:37,851 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:37,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:37,895 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-10-14 17:45:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:45:37,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2024-10-14 17:45:37,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:37,897 INFO L225 Difference]: With dead ends: 44 [2024-10-14 17:45:37,897 INFO L226 Difference]: Without dead ends: 44 [2024-10-14 17:45:37,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:45:37,899 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:37,900 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-14 17:45:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-14 17:45:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-10-14 17:45:37,909 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 6 [2024-10-14 17:45:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:37,910 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-10-14 17:45:37,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-10-14 17:45:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:45:37,911 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:37,911 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:45:37,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 17:45:37,913 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:37,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:37,913 INFO L85 PathProgramCache]: Analyzing trace with hash 349762668, now seen corresponding path program 1 times [2024-10-14 17:45:37,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:37,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076032946] [2024-10-14 17:45:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:37,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:38,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:38,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076032946] [2024-10-14 17:45:38,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076032946] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:38,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:38,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:45:38,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408388609] [2024-10-14 17:45:38,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:38,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:45:38,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:38,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:45:38,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:38,183 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:38,285 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-10-14 17:45:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:45:38,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2024-10-14 17:45:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:38,288 INFO L225 Difference]: With dead ends: 46 [2024-10-14 17:45:38,288 INFO L226 Difference]: Without dead ends: 46 [2024-10-14 17:45:38,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:38,291 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:38,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 99 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-14 17:45:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-14 17:45:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2024-10-14 17:45:38,300 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 6 [2024-10-14 17:45:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:38,300 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2024-10-14 17:45:38,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2024-10-14 17:45:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:45:38,302 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:38,302 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:38,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 17:45:38,302 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:38,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash -660584043, now seen corresponding path program 1 times [2024-10-14 17:45:38,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:38,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619286862] [2024-10-14 17:45:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:38,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:38,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:38,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619286862] [2024-10-14 17:45:38,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619286862] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:38,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:38,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:45:38,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939408269] [2024-10-14 17:45:38,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:38,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:45:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:38,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:45:38,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:38,382 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2024-10-14 17:45:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:38,421 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-10-14 17:45:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:45:38,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 8 [2024-10-14 17:45:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:38,422 INFO L225 Difference]: With dead ends: 61 [2024-10-14 17:45:38,422 INFO L226 Difference]: Without dead ends: 61 [2024-10-14 17:45:38,423 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:38,425 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 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 [2024-10-14 17:45:38,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-14 17:45:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2024-10-14 17:45:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.725) internal successors, (69), 54 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) [2024-10-14 17:45:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2024-10-14 17:45:38,434 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 8 [2024-10-14 17:45:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:38,435 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2024-10-14 17:45:38,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2024-10-14 17:45:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2024-10-14 17:45:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:45:38,436 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:38,437 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:38,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 17:45:38,437 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:38,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:38,438 INFO L85 PathProgramCache]: Analyzing trace with hash -603325741, now seen corresponding path program 1 times [2024-10-14 17:45:38,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:38,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507268623] [2024-10-14 17:45:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:38,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:38,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:38,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507268623] [2024-10-14 17:45:38,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507268623] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:38,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:38,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:45:38,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713531904] [2024-10-14 17:45:38,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:38,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:45:38,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:45:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:45:38,522 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:38,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:38,554 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2024-10-14 17:45:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:45:38,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-14 17:45:38,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:38,556 INFO L225 Difference]: With dead ends: 53 [2024-10-14 17:45:38,557 INFO L226 Difference]: Without dead ends: 53 [2024-10-14 17:45:38,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:45:38,558 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:38,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-14 17:45:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-14 17:45:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.675) internal successors, (67), 52 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2024-10-14 17:45:38,565 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 8 [2024-10-14 17:45:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:38,565 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2024-10-14 17:45:38,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2024-10-14 17:45:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:45:38,566 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:38,566 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:38,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 17:45:38,569 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:38,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash -603325740, now seen corresponding path program 1 times [2024-10-14 17:45:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:38,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608997111] [2024-10-14 17:45:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:38,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:38,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:38,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608997111] [2024-10-14 17:45:38,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608997111] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:38,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:38,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:45:38,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447283386] [2024-10-14 17:45:38,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:38,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:45:38,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:45:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:38,767 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2024-10-14 17:45:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:38,846 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2024-10-14 17:45:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:45:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 8 [2024-10-14 17:45:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:38,847 INFO L225 Difference]: With dead ends: 55 [2024-10-14 17:45:38,847 INFO L226 Difference]: Without dead ends: 55 [2024-10-14 17:45:38,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:45:38,848 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:38,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-14 17:45:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-10-14 17:45:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 54 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2024-10-14 17:45:38,856 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 8 [2024-10-14 17:45:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:38,857 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2024-10-14 17:45:38,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2024-10-14 17:45:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2024-10-14 17:45:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:45:38,857 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:38,857 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:38,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 17:45:38,858 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:38,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1114578426, now seen corresponding path program 1 times [2024-10-14 17:45:38,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:38,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144066750] [2024-10-14 17:45:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:38,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:39,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:39,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144066750] [2024-10-14 17:45:39,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144066750] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:39,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925924766] [2024-10-14 17:45:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:39,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:39,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:39,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:39,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 17:45:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:39,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 17:45:39,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:39,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 17:45:39,223 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 13 treesize of output 1 [2024-10-14 17:45:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:39,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:39,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925924766] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:39,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:39,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-14 17:45:39,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185924060] [2024-10-14 17:45:39,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:39,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 17:45:39,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:39,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 17:45:39,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-10-14 17:45:39,509 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:39,697 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2024-10-14 17:45:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:45:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-14 17:45:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:39,699 INFO L225 Difference]: With dead ends: 56 [2024-10-14 17:45:39,699 INFO L226 Difference]: Without dead ends: 56 [2024-10-14 17:45:39,700 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:45:39,700 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 13 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:39,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-14 17:45:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2024-10-14 17:45:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.631578947368421) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-10-14 17:45:39,705 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 8 [2024-10-14 17:45:39,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:39,705 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-10-14 17:45:39,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-10-14 17:45:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 17:45:39,705 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:39,705 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:39,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 17:45:39,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:39,907 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:39,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:39,907 INFO L85 PathProgramCache]: Analyzing trace with hash 996729527, now seen corresponding path program 1 times [2024-10-14 17:45:39,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:39,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368560102] [2024-10-14 17:45:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:39,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:40,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:40,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368560102] [2024-10-14 17:45:40,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368560102] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:40,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:40,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:45:40,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056055411] [2024-10-14 17:45:40,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:40,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:45:40,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:40,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:45:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:40,028 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:40,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:40,056 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2024-10-14 17:45:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:45:40,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-14 17:45:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:40,057 INFO L225 Difference]: With dead ends: 54 [2024-10-14 17:45:40,057 INFO L226 Difference]: Without dead ends: 54 [2024-10-14 17:45:40,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:40,058 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:40,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 73 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-14 17:45:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-10-14 17:45:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.6) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-10-14 17:45:40,061 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 9 [2024-10-14 17:45:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:40,061 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-10-14 17:45:40,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-10-14 17:45:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 17:45:40,062 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:40,062 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:40,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 17:45:40,063 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:40,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1523230407, now seen corresponding path program 1 times [2024-10-14 17:45:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:40,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738743007] [2024-10-14 17:45:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:40,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:40,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:40,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738743007] [2024-10-14 17:45:40,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738743007] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:40,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:40,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:45:40,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571917949] [2024-10-14 17:45:40,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:40,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:45:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:45:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:40,188 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:40,216 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2024-10-14 17:45:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:45:40,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-14 17:45:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:40,217 INFO L225 Difference]: With dead ends: 51 [2024-10-14 17:45:40,217 INFO L226 Difference]: Without dead ends: 51 [2024-10-14 17:45:40,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:40,218 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:40,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 89 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:40,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-14 17:45:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2024-10-14 17:45:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.605263157894737) internal successors, (61), 48 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) [2024-10-14 17:45:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2024-10-14 17:45:40,224 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2024-10-14 17:45:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:40,225 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2024-10-14 17:45:40,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2024-10-14 17:45:40,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-14 17:45:40,226 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:40,226 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:40,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 17:45:40,226 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:40,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:40,227 INFO L85 PathProgramCache]: Analyzing trace with hash 833844260, now seen corresponding path program 1 times [2024-10-14 17:45:40,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:40,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123525617] [2024-10-14 17:45:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:40,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:40,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:40,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123525617] [2024-10-14 17:45:40,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123525617] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:40,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:40,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:45:40,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833811352] [2024-10-14 17:45:40,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:40,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:45:40,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:40,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:45:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:40,354 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:40,402 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2024-10-14 17:45:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:45:40,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2024-10-14 17:45:40,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:40,405 INFO L225 Difference]: With dead ends: 60 [2024-10-14 17:45:40,405 INFO L226 Difference]: Without dead ends: 60 [2024-10-14 17:45:40,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:40,406 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:40,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 97 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-14 17:45:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-10-14 17:45:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 58 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2024-10-14 17:45:40,412 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 10 [2024-10-14 17:45:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:40,415 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2024-10-14 17:45:40,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2024-10-14 17:45:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-14 17:45:40,416 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:40,416 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:40,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 17:45:40,416 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:40,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:40,417 INFO L85 PathProgramCache]: Analyzing trace with hash 24632781, now seen corresponding path program 1 times [2024-10-14 17:45:40,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:40,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638532207] [2024-10-14 17:45:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:40,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:40,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638532207] [2024-10-14 17:45:40,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638532207] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:40,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740761749] [2024-10-14 17:45:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:40,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:40,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:40,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:40,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 17:45:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:40,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 17:45:40,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 17:45:40,722 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 7 [2024-10-14 17:45:40,731 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 [2024-10-14 17:45:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:40,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:41,070 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 17:45:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:41,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740761749] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:41,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:41,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-10-14 17:45:41,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113401058] [2024-10-14 17:45:41,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:41,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 17:45:41,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:41,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 17:45:41,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:45:41,106 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:41,314 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2024-10-14 17:45:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 17:45:41,315 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 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) Word has length 10 [2024-10-14 17:45:41,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:41,315 INFO L225 Difference]: With dead ends: 60 [2024-10-14 17:45:41,315 INFO L226 Difference]: Without dead ends: 60 [2024-10-14 17:45:41,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2024-10-14 17:45:41,316 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:41,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 187 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-14 17:45:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-10-14 17:45:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.5) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-14 17:45:41,320 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 10 [2024-10-14 17:45:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:41,320 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-14 17:45:41,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-14 17:45:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-14 17:45:41,321 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:41,321 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:41,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:41,525 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,SelfDestructingSolverStorable10 [2024-10-14 17:45:41,526 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:41,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:41,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1513902630, now seen corresponding path program 1 times [2024-10-14 17:45:41,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:41,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593563338] [2024-10-14 17:45:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:41,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:41,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:41,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593563338] [2024-10-14 17:45:41,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593563338] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:41,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:41,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:45:41,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901920530] [2024-10-14 17:45:41,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:41,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:45:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:45:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:41,667 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:41,707 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-10-14 17:45:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:45:41,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2024-10-14 17:45:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:41,708 INFO L225 Difference]: With dead ends: 66 [2024-10-14 17:45:41,709 INFO L226 Difference]: Without dead ends: 66 [2024-10-14 17:45:41,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:41,709 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:41,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-14 17:45:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2024-10-14 17:45:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2024-10-14 17:45:41,715 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 10 [2024-10-14 17:45:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:41,715 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2024-10-14 17:45:41,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2024-10-14 17:45:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-14 17:45:41,716 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:41,716 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:41,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-14 17:45:41,716 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:41,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:41,716 INFO L85 PathProgramCache]: Analyzing trace with hash 375850164, now seen corresponding path program 1 times [2024-10-14 17:45:41,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:41,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661290801] [2024-10-14 17:45:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:41,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:41,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661290801] [2024-10-14 17:45:41,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661290801] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:41,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:41,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:45:41,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095040408] [2024-10-14 17:45:41,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:41,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:45:41,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:41,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:45:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:41,884 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:41,917 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2024-10-14 17:45:41,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:45:41,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-14 17:45:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:41,918 INFO L225 Difference]: With dead ends: 55 [2024-10-14 17:45:41,918 INFO L226 Difference]: Without dead ends: 55 [2024-10-14 17:45:41,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:41,919 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:41,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-14 17:45:41,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2024-10-14 17:45:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-10-14 17:45:41,926 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 12 [2024-10-14 17:45:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:41,926 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-10-14 17:45:41,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-10-14 17:45:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 17:45:41,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:41,927 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:41,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-14 17:45:41,927 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:41,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:41,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2000000127, now seen corresponding path program 1 times [2024-10-14 17:45:41,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:41,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243766314] [2024-10-14 17:45:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:41,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:41,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243766314] [2024-10-14 17:45:41,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243766314] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:41,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:41,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:45:41,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472731132] [2024-10-14 17:45:41,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:41,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:45:41,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:45:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:45:41,957 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 3 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) [2024-10-14 17:45:41,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:41,972 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-10-14 17:45:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:45:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 14 [2024-10-14 17:45:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:41,973 INFO L225 Difference]: With dead ends: 46 [2024-10-14 17:45:41,973 INFO L226 Difference]: Without dead ends: 46 [2024-10-14 17:45:41,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:45:41,974 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:41,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-14 17:45:41,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-14 17:45:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2024-10-14 17:45:41,977 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 14 [2024-10-14 17:45:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:41,977 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2024-10-14 17:45:41,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2024-10-14 17:45:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2024-10-14 17:45:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 17:45:41,978 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:41,978 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:41,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-14 17:45:41,978 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:41,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:41,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2000026225, now seen corresponding path program 1 times [2024-10-14 17:45:41,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:41,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456828340] [2024-10-14 17:45:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:41,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:42,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:42,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456828340] [2024-10-14 17:45:42,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456828340] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:42,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:42,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:45:42,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055140454] [2024-10-14 17:45:42,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:42,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:45:42,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:42,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:45:42,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:42,016 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2024-10-14 17:45:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:42,051 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2024-10-14 17:45:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:45:42,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 14 [2024-10-14 17:45:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:42,052 INFO L225 Difference]: With dead ends: 51 [2024-10-14 17:45:42,052 INFO L226 Difference]: Without dead ends: 51 [2024-10-14 17:45:42,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:42,052 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:42,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 62 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-14 17:45:42,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-10-14 17:45:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-10-14 17:45:42,055 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 14 [2024-10-14 17:45:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:42,055 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-10-14 17:45:42,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2024-10-14 17:45:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-10-14 17:45:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 17:45:42,058 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:42,058 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:42,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-14 17:45:42,059 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:42,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:42,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2000026224, now seen corresponding path program 1 times [2024-10-14 17:45:42,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:42,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448187033] [2024-10-14 17:45:42,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:42,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:42,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:42,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448187033] [2024-10-14 17:45:42,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448187033] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:42,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:42,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:45:42,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027285321] [2024-10-14 17:45:42,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:42,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:45:42,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:42,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:45:42,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:42,147 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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) [2024-10-14 17:45:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:42,211 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2024-10-14 17:45:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:45:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 14 [2024-10-14 17:45:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:42,212 INFO L225 Difference]: With dead ends: 60 [2024-10-14 17:45:42,212 INFO L226 Difference]: Without dead ends: 60 [2024-10-14 17:45:42,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:45:42,213 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:42,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 128 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-14 17:45:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2024-10-14 17:45:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 49 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2024-10-14 17:45:42,215 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 14 [2024-10-14 17:45:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:42,216 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2024-10-14 17:45:42,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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) [2024-10-14 17:45:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2024-10-14 17:45:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 17:45:42,216 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:42,216 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:42,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-14 17:45:42,217 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:42,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:42,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2000825552, now seen corresponding path program 1 times [2024-10-14 17:45:42,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:42,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001415605] [2024-10-14 17:45:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:42,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:42,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:42,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001415605] [2024-10-14 17:45:42,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001415605] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:42,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:42,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:45:42,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611817499] [2024-10-14 17:45:42,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:42,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:45:42,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:42,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:45:42,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:42,264 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2024-10-14 17:45:42,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:42,301 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-10-14 17:45:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:45:42,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 14 [2024-10-14 17:45:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:42,302 INFO L225 Difference]: With dead ends: 49 [2024-10-14 17:45:42,302 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 17:45:42,302 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 [2024-10-14 17:45:42,302 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:42,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 17:45:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-14 17:45:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.5) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-10-14 17:45:42,305 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 14 [2024-10-14 17:45:42,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:42,305 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-10-14 17:45:42,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2024-10-14 17:45:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-10-14 17:45:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 17:45:42,305 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:42,305 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:42,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-14 17:45:42,306 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:42,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:42,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2000825551, now seen corresponding path program 1 times [2024-10-14 17:45:42,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:42,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238454851] [2024-10-14 17:45:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:42,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:42,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:42,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238454851] [2024-10-14 17:45:42,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238454851] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:42,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:42,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:45:42,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29637899] [2024-10-14 17:45:42,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:42,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:45:42,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:45:42,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:42,435 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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) [2024-10-14 17:45:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:42,483 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-10-14 17:45:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:45:42,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 14 [2024-10-14 17:45:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:42,484 INFO L225 Difference]: With dead ends: 52 [2024-10-14 17:45:42,484 INFO L226 Difference]: Without dead ends: 52 [2024-10-14 17:45:42,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:42,484 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:42,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 95 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-14 17:45:42,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-10-14 17:45:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 49 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2024-10-14 17:45:42,486 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 14 [2024-10-14 17:45:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:42,487 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2024-10-14 17:45:42,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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) [2024-10-14 17:45:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2024-10-14 17:45:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 17:45:42,487 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:42,487 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:42,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-14 17:45:42,488 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:42,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1871265672, now seen corresponding path program 1 times [2024-10-14 17:45:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:42,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002320924] [2024-10-14 17:45:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:42,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:42,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:42,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002320924] [2024-10-14 17:45:42,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002320924] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:42,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:42,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:45:42,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386770384] [2024-10-14 17:45:42,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:42,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:45:42,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:42,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:45:42,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:42,526 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:42,561 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-10-14 17:45:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:45:42,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-14 17:45:42,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:42,562 INFO L225 Difference]: With dead ends: 49 [2024-10-14 17:45:42,562 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 17:45:42,562 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 [2024-10-14 17:45:42,562 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:42,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 61 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 17:45:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-14 17:45:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-10-14 17:45:42,564 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 15 [2024-10-14 17:45:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:42,564 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-10-14 17:45:42,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-10-14 17:45:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 17:45:42,567 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:42,567 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:42,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-14 17:45:42,567 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:42,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1871265671, now seen corresponding path program 1 times [2024-10-14 17:45:42,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:42,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030963417] [2024-10-14 17:45:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:42,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:42,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:42,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030963417] [2024-10-14 17:45:42,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030963417] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:42,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:42,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:45:42,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392805344] [2024-10-14 17:45:42,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:42,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:45:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:45:42,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:42,656 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:42,690 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2024-10-14 17:45:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:45:42,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-14 17:45:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:42,691 INFO L225 Difference]: With dead ends: 54 [2024-10-14 17:45:42,691 INFO L226 Difference]: Without dead ends: 54 [2024-10-14 17:45:42,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:42,692 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:42,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 85 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-14 17:45:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-10-14 17:45:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.425531914893617) internal successors, (67), 52 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2024-10-14 17:45:42,694 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 15 [2024-10-14 17:45:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:42,695 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2024-10-14 17:45:42,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2024-10-14 17:45:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 17:45:42,695 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:42,696 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:42,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-14 17:45:42,696 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:42,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:42,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1896049923, now seen corresponding path program 1 times [2024-10-14 17:45:42,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:42,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321837721] [2024-10-14 17:45:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:42,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:42,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:42,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321837721] [2024-10-14 17:45:42,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321837721] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:42,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:42,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:45:42,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939575578] [2024-10-14 17:45:42,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:42,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:45:42,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:42,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:45:42,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:42,753 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:42,796 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-10-14 17:45:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:45:42,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-14 17:45:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:42,797 INFO L225 Difference]: With dead ends: 57 [2024-10-14 17:45:42,797 INFO L226 Difference]: Without dead ends: 57 [2024-10-14 17:45:42,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:42,798 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:42,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 82 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-14 17:45:42,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-10-14 17:45:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2024-10-14 17:45:42,800 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 15 [2024-10-14 17:45:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:42,801 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2024-10-14 17:45:42,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2024-10-14 17:45:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 17:45:42,802 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:42,802 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:42,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-14 17:45:42,802 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:42,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1896049922, now seen corresponding path program 1 times [2024-10-14 17:45:42,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:42,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996282694] [2024-10-14 17:45:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:42,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:42,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:42,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996282694] [2024-10-14 17:45:42,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996282694] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:42,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:42,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 17:45:42,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352574010] [2024-10-14 17:45:42,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:42,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:45:42,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:42,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:45:42,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:45:42,923 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:43,003 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-10-14 17:45:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 17:45:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-14 17:45:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:43,004 INFO L225 Difference]: With dead ends: 62 [2024-10-14 17:45:43,004 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 17:45:43,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 17:45:43,005 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:43,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 128 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 17:45:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2024-10-14 17:45:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 52 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2024-10-14 17:45:43,008 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 15 [2024-10-14 17:45:43,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:43,008 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2024-10-14 17:45:43,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2024-10-14 17:45:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 17:45:43,008 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:43,008 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:43,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-14 17:45:43,009 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:43,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1836895611, now seen corresponding path program 1 times [2024-10-14 17:45:43,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:43,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374570156] [2024-10-14 17:45:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:43,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:43,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:43,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374570156] [2024-10-14 17:45:43,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374570156] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:43,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:43,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:45:43,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612870740] [2024-10-14 17:45:43,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:43,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:45:43,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:43,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:45:43,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:43,087 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:43,118 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2024-10-14 17:45:43,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:45:43,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-14 17:45:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:43,119 INFO L225 Difference]: With dead ends: 52 [2024-10-14 17:45:43,119 INFO L226 Difference]: Without dead ends: 52 [2024-10-14 17:45:43,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:43,120 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:43,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 70 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-14 17:45:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2024-10-14 17:45:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 47 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) [2024-10-14 17:45:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2024-10-14 17:45:43,121 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 15 [2024-10-14 17:45:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:43,121 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2024-10-14 17:45:43,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2024-10-14 17:45:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-14 17:45:43,122 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:43,122 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:43,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-14 17:45:43,122 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:43,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1351979960, now seen corresponding path program 1 times [2024-10-14 17:45:43,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:43,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178191972] [2024-10-14 17:45:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:43,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:43,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178191972] [2024-10-14 17:45:43,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178191972] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:43,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:43,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:45:43,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287341572] [2024-10-14 17:45:43,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:43,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:45:43,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:45:43,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:43,230 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:43,251 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2024-10-14 17:45:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:45:43,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-14 17:45:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:43,252 INFO L225 Difference]: With dead ends: 47 [2024-10-14 17:45:43,252 INFO L226 Difference]: Without dead ends: 45 [2024-10-14 17:45:43,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:45:43,253 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:43,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 54 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-14 17:45:43,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-14 17:45:43,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-10-14 17:45:43,256 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 16 [2024-10-14 17:45:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:43,256 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-10-14 17:45:43,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-10-14 17:45:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 17:45:43,256 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:43,257 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:43,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-14 17:45:43,257 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:43,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:43,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1039098078, now seen corresponding path program 1 times [2024-10-14 17:45:43,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:43,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118380913] [2024-10-14 17:45:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:43,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:43,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:43,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118380913] [2024-10-14 17:45:43,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118380913] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:43,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:43,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:45:43,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317224251] [2024-10-14 17:45:43,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:43,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:45:43,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:43,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:45:43,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:43,346 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 5 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) [2024-10-14 17:45:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:43,378 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2024-10-14 17:45:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:45:43,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 17 [2024-10-14 17:45:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:43,379 INFO L225 Difference]: With dead ends: 64 [2024-10-14 17:45:43,379 INFO L226 Difference]: Without dead ends: 64 [2024-10-14 17:45:43,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:43,380 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:43,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-14 17:45:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2024-10-14 17:45:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 61 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2024-10-14 17:45:43,384 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 17 [2024-10-14 17:45:43,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:43,384 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2024-10-14 17:45:43,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2024-10-14 17:45:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2024-10-14 17:45:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 17:45:43,384 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:43,385 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:43,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-14 17:45:43,385 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:43,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:43,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1976005540, now seen corresponding path program 1 times [2024-10-14 17:45:43,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:43,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200510535] [2024-10-14 17:45:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:43,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:43,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:43,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200510535] [2024-10-14 17:45:43,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200510535] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:43,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:43,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:45:43,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994909297] [2024-10-14 17:45:43,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:43,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:45:43,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:43,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:45:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:43,481 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) 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) [2024-10-14 17:45:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:43,506 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2024-10-14 17:45:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:45:43,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) 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 17 [2024-10-14 17:45:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:43,507 INFO L225 Difference]: With dead ends: 62 [2024-10-14 17:45:43,507 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 17:45:43,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:43,508 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:43,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 73 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 17:45:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2024-10-14 17:45:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-10-14 17:45:43,509 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 17 [2024-10-14 17:45:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:43,509 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-10-14 17:45:43,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) 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) [2024-10-14 17:45:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-10-14 17:45:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 17:45:43,510 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:43,510 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:43,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-10-14 17:45:43,511 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:43,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:43,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2147426936, now seen corresponding path program 1 times [2024-10-14 17:45:43,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:43,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134122474] [2024-10-14 17:45:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:43,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:43,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:43,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134122474] [2024-10-14 17:45:43,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134122474] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:43,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:43,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:45:43,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493281031] [2024-10-14 17:45:43,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:43,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:45:43,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:43,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:45:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:43,628 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2024-10-14 17:45:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:43,672 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2024-10-14 17:45:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:45:43,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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 18 [2024-10-14 17:45:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:43,673 INFO L225 Difference]: With dead ends: 47 [2024-10-14 17:45:43,673 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 17:45:43,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:45:43,674 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:43,674 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 69 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 17:45:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-10-14 17:45:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.302325581395349) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-10-14 17:45:43,676 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 18 [2024-10-14 17:45:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:43,676 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-10-14 17:45:43,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2024-10-14 17:45:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-10-14 17:45:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 17:45:43,677 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:43,677 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:43,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-10-14 17:45:43,677 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:43,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:43,678 INFO L85 PathProgramCache]: Analyzing trace with hash -932678646, now seen corresponding path program 1 times [2024-10-14 17:45:43,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:43,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866961795] [2024-10-14 17:45:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:43,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:43,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:43,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866961795] [2024-10-14 17:45:43,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866961795] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:43,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:43,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:45:43,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103917971] [2024-10-14 17:45:43,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:43,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:45:43,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:43,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:45:43,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:43,755 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:43,789 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-10-14 17:45:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:45:43,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-14 17:45:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:43,790 INFO L225 Difference]: With dead ends: 53 [2024-10-14 17:45:43,790 INFO L226 Difference]: Without dead ends: 53 [2024-10-14 17:45:43,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:45:43,791 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:43,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 91 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-14 17:45:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-14 17:45:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-10-14 17:45:43,792 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 19 [2024-10-14 17:45:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:43,792 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-10-14 17:45:43,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-10-14 17:45:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 17:45:43,793 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:43,793 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:43,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-10-14 17:45:43,793 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:43,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:43,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1773940748, now seen corresponding path program 1 times [2024-10-14 17:45:43,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:43,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923623227] [2024-10-14 17:45:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:43,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:43,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:43,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923623227] [2024-10-14 17:45:43,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923623227] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:43,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:43,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 17:45:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149132658] [2024-10-14 17:45:43,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:43,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:45:43,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:43,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:45:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:45:43,894 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:43,949 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2024-10-14 17:45:43,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:45:43,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-14 17:45:43,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:43,950 INFO L225 Difference]: With dead ends: 61 [2024-10-14 17:45:43,950 INFO L226 Difference]: Without dead ends: 61 [2024-10-14 17:45:43,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-14 17:45:43,951 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:43,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 107 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-14 17:45:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-10-14 17:45:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-10-14 17:45:43,953 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 19 [2024-10-14 17:45:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:43,953 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-10-14 17:45:43,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-10-14 17:45:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:45:43,954 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:43,954 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:43,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-10-14 17:45:43,954 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:43,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:43,955 INFO L85 PathProgramCache]: Analyzing trace with hash -457925075, now seen corresponding path program 1 times [2024-10-14 17:45:43,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:43,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320652619] [2024-10-14 17:45:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:43,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:44,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:44,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320652619] [2024-10-14 17:45:44,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320652619] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:44,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:44,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 17:45:44,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262036637] [2024-10-14 17:45:44,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:44,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:45:44,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:45:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:45:44,080 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:44,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:44,114 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2024-10-14 17:45:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 17:45:44,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-14 17:45:44,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:44,115 INFO L225 Difference]: With dead ends: 78 [2024-10-14 17:45:44,115 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 17:45:44,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:45:44,115 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:44,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 119 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 17:45:44,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-14 17:45:44,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 61 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) [2024-10-14 17:45:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2024-10-14 17:45:44,117 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 21 [2024-10-14 17:45:44,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:44,117 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2024-10-14 17:45:44,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2024-10-14 17:45:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:45:44,117 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:44,118 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:44,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-10-14 17:45:44,118 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:44,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:44,120 INFO L85 PathProgramCache]: Analyzing trace with hash -571021453, now seen corresponding path program 1 times [2024-10-14 17:45:44,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:44,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441596325] [2024-10-14 17:45:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:44,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:44,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:44,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441596325] [2024-10-14 17:45:44,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441596325] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:44,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297529217] [2024-10-14 17:45:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:44,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:44,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:44,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:44,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 17:45:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:44,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 17:45:44,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:44,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:44,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297529217] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:44,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 17:45:44,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 5] total 14 [2024-10-14 17:45:44,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996848636] [2024-10-14 17:45:44,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:44,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:45:44,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:44,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:45:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:45:44,511 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:44,528 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2024-10-14 17:45:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:45:44,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-14 17:45:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:44,529 INFO L225 Difference]: With dead ends: 63 [2024-10-14 17:45:44,529 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 17:45:44,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:45:44,530 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:44,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 17:45:44,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-14 17:45:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2024-10-14 17:45:44,532 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 21 [2024-10-14 17:45:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:44,533 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2024-10-14 17:45:44,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2024-10-14 17:45:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:45:44,533 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:44,534 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:44,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 17:45:44,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:44,738 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:44,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:44,738 INFO L85 PathProgramCache]: Analyzing trace with hash -570986632, now seen corresponding path program 1 times [2024-10-14 17:45:44,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:44,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823626669] [2024-10-14 17:45:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:44,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:44,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:44,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823626669] [2024-10-14 17:45:44,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823626669] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:44,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875277932] [2024-10-14 17:45:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:44,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:44,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:44,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:45:44,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 17:45:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:44,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 17:45:44,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:44,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 17:45:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:45,038 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:45:45,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875277932] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:45,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:45:45,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2024-10-14 17:45:45,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846971442] [2024-10-14 17:45:45,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:45,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:45:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:45:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-10-14 17:45:45,041 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:45,082 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2024-10-14 17:45:45,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:45:45,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-14 17:45:45,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:45,083 INFO L225 Difference]: With dead ends: 65 [2024-10-14 17:45:45,083 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 17:45:45,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-10-14 17:45:45,084 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:45,084 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 131 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 17:45:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-14 17:45:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-10-14 17:45:45,087 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 21 [2024-10-14 17:45:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:45,087 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-10-14 17:45:45,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-10-14 17:45:45,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:45:45,088 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:45,088 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:45,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 17:45:45,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:45,293 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:45,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1275573525, now seen corresponding path program 1 times [2024-10-14 17:45:45,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:45,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941826530] [2024-10-14 17:45:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:45,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:45,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:45,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941826530] [2024-10-14 17:45:45,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941826530] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:45,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:45:45,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 17:45:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248684176] [2024-10-14 17:45:45,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:45,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 17:45:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 17:45:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-14 17:45:45,453 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:45,504 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2024-10-14 17:45:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:45:45,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-14 17:45:45,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:45,505 INFO L225 Difference]: With dead ends: 77 [2024-10-14 17:45:45,505 INFO L226 Difference]: Without dead ends: 63 [2024-10-14 17:45:45,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-14 17:45:45,507 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:45,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:45:45,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-14 17:45:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2024-10-14 17:45:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-10-14 17:45:45,509 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 21 [2024-10-14 17:45:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:45,509 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-10-14 17:45:45,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,509 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-10-14 17:45:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:45:45,509 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:45,510 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:45,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-10-14 17:45:45,510 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:45,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1388635082, now seen corresponding path program 1 times [2024-10-14 17:45:45,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:45,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852147951] [2024-10-14 17:45:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:45,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:45,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:45,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852147951] [2024-10-14 17:45:45,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852147951] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:45,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391848779] [2024-10-14 17:45:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:45,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:45,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:45,643 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) [2024-10-14 17:45:45,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 17:45:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:45,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 17:45:45,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:45,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-14 17:45:45,875 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 17:45:45,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:45:45,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2024-10-14 17:45:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:45,895 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:45:45,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391848779] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:45:45,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:45:45,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2024-10-14 17:45:45,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745267388] [2024-10-14 17:45:45,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:45:45,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:45:45,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:45,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:45:45,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:45:45,897 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:45,956 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2024-10-14 17:45:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 17:45:45,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-14 17:45:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:45,956 INFO L225 Difference]: With dead ends: 66 [2024-10-14 17:45:45,957 INFO L226 Difference]: Without dead ends: 53 [2024-10-14 17:45:45,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:45:45,957 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:45,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 153 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-14 17:45:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-10-14 17:45:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-10-14 17:45:45,959 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 21 [2024-10-14 17:45:45,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:45,959 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-10-14 17:45:45,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-10-14 17:45:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 17:45:45,960 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:45,960 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:45,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 17:45:46,164 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,SelfDestructingSolverStorable33 [2024-10-14 17:45:46,165 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:46,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1662260125, now seen corresponding path program 1 times [2024-10-14 17:45:46,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:46,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493350226] [2024-10-14 17:45:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:46,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:46,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:46,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493350226] [2024-10-14 17:45:46,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493350226] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:46,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152583106] [2024-10-14 17:45:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:46,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:46,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:46,391 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) [2024-10-14 17:45:46,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 17:45:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:46,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 17:45:46,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:46,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:45:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:46,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:46,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152583106] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:46,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:46,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-10-14 17:45:46,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480770579] [2024-10-14 17:45:46,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:46,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 17:45:46,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:46,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 17:45:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-10-14 17:45:46,763 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 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) [2024-10-14 17:45:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:46,933 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2024-10-14 17:45:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 17:45:46,933 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 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) Word has length 23 [2024-10-14 17:45:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:46,933 INFO L225 Difference]: With dead ends: 63 [2024-10-14 17:45:46,933 INFO L226 Difference]: Without dead ends: 63 [2024-10-14 17:45:46,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-10-14 17:45:46,934 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:46,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 159 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-14 17:45:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-10-14 17:45:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 59 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) [2024-10-14 17:45:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2024-10-14 17:45:46,936 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 23 [2024-10-14 17:45:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:46,936 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2024-10-14 17:45:46,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 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) [2024-10-14 17:45:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2024-10-14 17:45:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 17:45:46,936 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:46,936 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:46,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 17:45:47,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:47,141 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:47,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:47,141 INFO L85 PathProgramCache]: Analyzing trace with hash -634123160, now seen corresponding path program 1 times [2024-10-14 17:45:47,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:47,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065398419] [2024-10-14 17:45:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:47,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:47,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:47,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065398419] [2024-10-14 17:45:47,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065398419] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:47,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835628434] [2024-10-14 17:45:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:47,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:47,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:47,366 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) [2024-10-14 17:45:47,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 17:45:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:47,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 17:45:47,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:47,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:45:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:47,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:47,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835628434] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:47,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:47,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-10-14 17:45:47,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298143201] [2024-10-14 17:45:47,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:47,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 17:45:47,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 17:45:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-10-14 17:45:47,707 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:47,875 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2024-10-14 17:45:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 17:45:47,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 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 23 [2024-10-14 17:45:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:47,876 INFO L225 Difference]: With dead ends: 64 [2024-10-14 17:45:47,876 INFO L226 Difference]: Without dead ends: 64 [2024-10-14 17:45:47,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-10-14 17:45:47,876 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:47,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 178 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-14 17:45:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2024-10-14 17:45:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-10-14 17:45:47,878 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 23 [2024-10-14 17:45:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:47,879 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-10-14 17:45:47,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-10-14 17:45:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 17:45:47,880 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:47,880 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:47,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 17:45:48,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:48,084 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:48,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1817018535, now seen corresponding path program 1 times [2024-10-14 17:45:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:48,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819502115] [2024-10-14 17:45:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:48,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:48,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819502115] [2024-10-14 17:45:48,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819502115] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:48,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697454201] [2024-10-14 17:45:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:48,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:48,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:48,288 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) [2024-10-14 17:45:48,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 17:45:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:48,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 17:45:48,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:48,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:48,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 17:45:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:48,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697454201] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:48,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:48,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-10-14 17:45:48,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876446795] [2024-10-14 17:45:48,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:48,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 17:45:48,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:48,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 17:45:48,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-10-14 17:45:48,647 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:48,842 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2024-10-14 17:45:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 17:45:48,842 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2024-10-14 17:45:48,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:48,843 INFO L225 Difference]: With dead ends: 66 [2024-10-14 17:45:48,843 INFO L226 Difference]: Without dead ends: 66 [2024-10-14 17:45:48,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-10-14 17:45:48,844 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:48,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 281 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-14 17:45:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-10-14 17:45:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.206896551724138) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2024-10-14 17:45:48,846 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 24 [2024-10-14 17:45:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:48,846 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2024-10-14 17:45:48,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:48,846 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2024-10-14 17:45:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 17:45:48,847 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:48,847 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:48,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:49,047 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,SelfDestructingSolverStorable36 [2024-10-14 17:45:49,047 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:49,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:49,048 INFO L85 PathProgramCache]: Analyzing trace with hash -581487624, now seen corresponding path program 2 times [2024-10-14 17:45:49,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:49,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535252157] [2024-10-14 17:45:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:49,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:49,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:49,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535252157] [2024-10-14 17:45:49,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535252157] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:49,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666469067] [2024-10-14 17:45:49,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:45:49,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:49,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:49,295 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) [2024-10-14 17:45:49,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 17:45:49,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:45:49,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:49,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 17:45:49,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:49,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 17:45:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:49,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:49,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 17:45:49,742 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 [2024-10-14 17:45:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:49,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666469067] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:49,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:49,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2024-10-14 17:45:49,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602383769] [2024-10-14 17:45:49,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:49,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-14 17:45:49,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-14 17:45:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-10-14 17:45:49,935 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:50,104 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2024-10-14 17:45:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 17:45:50,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2024-10-14 17:45:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:50,105 INFO L225 Difference]: With dead ends: 103 [2024-10-14 17:45:50,105 INFO L226 Difference]: Without dead ends: 83 [2024-10-14 17:45:50,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-10-14 17:45:50,106 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:50,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 378 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-14 17:45:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2024-10-14 17:45:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2024-10-14 17:45:50,108 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 26 [2024-10-14 17:45:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:50,109 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2024-10-14 17:45:50,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2024-10-14 17:45:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 17:45:50,109 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:50,109 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:50,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 17:45:50,309 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,SelfDestructingSolverStorable37 [2024-10-14 17:45:50,310 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:50,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:50,310 INFO L85 PathProgramCache]: Analyzing trace with hash -535360890, now seen corresponding path program 3 times [2024-10-14 17:45:50,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:50,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805975168] [2024-10-14 17:45:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:50,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:50,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:50,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805975168] [2024-10-14 17:45:50,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805975168] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:50,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102772614] [2024-10-14 17:45:50,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:45:50,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:50,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:50,577 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) [2024-10-14 17:45:50,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 17:45:50,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 17:45:50,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:50,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-14 17:45:50,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:50,686 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 [2024-10-14 17:45:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:50,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:51,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102772614] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:51,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:51,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-10-14 17:45:51,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620125997] [2024-10-14 17:45:51,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:51,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 17:45:51,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:51,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 17:45:51,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-10-14 17:45:51,055 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 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) [2024-10-14 17:45:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:51,325 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2024-10-14 17:45:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 17:45:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 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 28 [2024-10-14 17:45:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:51,326 INFO L225 Difference]: With dead ends: 93 [2024-10-14 17:45:51,326 INFO L226 Difference]: Without dead ends: 93 [2024-10-14 17:45:51,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-10-14 17:45:51,327 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 23 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:51,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 310 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:45:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-14 17:45:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2024-10-14 17:45:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 91 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2024-10-14 17:45:51,330 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 28 [2024-10-14 17:45:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:51,330 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2024-10-14 17:45:51,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 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) [2024-10-14 17:45:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2024-10-14 17:45:51,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 17:45:51,331 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:51,331 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:51,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:51,535 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,SelfDestructingSolverStorable38 [2024-10-14 17:45:51,536 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:51,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1832325832, now seen corresponding path program 2 times [2024-10-14 17:45:51,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:51,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160676063] [2024-10-14 17:45:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:51,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:45:51,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:51,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160676063] [2024-10-14 17:45:51,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160676063] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:51,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316017505] [2024-10-14 17:45:51,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:45:51,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:51,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:51,712 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) [2024-10-14 17:45:51,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 17:45:51,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:45:51,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:51,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-14 17:45:51,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:51,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 17:45:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:51,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:51,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 17:45:51,969 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 16 treesize of output 12 [2024-10-14 17:45:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:45:52,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316017505] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:52,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:52,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 19 [2024-10-14 17:45:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617147069] [2024-10-14 17:45:52,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:52,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 17:45:52,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 17:45:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2024-10-14 17:45:52,025 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:52,338 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2024-10-14 17:45:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-14 17:45:52,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 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 28 [2024-10-14 17:45:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:52,339 INFO L225 Difference]: With dead ends: 124 [2024-10-14 17:45:52,339 INFO L226 Difference]: Without dead ends: 91 [2024-10-14 17:45:52,340 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-10-14 17:45:52,340 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:52,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 318 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:45:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-14 17:45:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2024-10-14 17:45:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 87 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2024-10-14 17:45:52,342 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 28 [2024-10-14 17:45:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:52,342 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2024-10-14 17:45:52,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2024-10-14 17:45:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 17:45:52,343 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:52,343 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:52,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 17:45:52,546 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,SelfDestructingSolverStorable39 [2024-10-14 17:45:52,547 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:52,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:52,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1722652561, now seen corresponding path program 4 times [2024-10-14 17:45:52,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:52,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111436873] [2024-10-14 17:45:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:52,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:45:52,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:52,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111436873] [2024-10-14 17:45:52,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111436873] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:52,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439332303] [2024-10-14 17:45:52,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:45:52,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:52,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:52,865 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) [2024-10-14 17:45:52,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 17:45:52,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:45:52,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:52,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-14 17:45:52,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:52,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-14 17:45:54,207 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-10-14 17:45:54,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2024-10-14 17:45:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 1 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:45:54,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:54,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-10-14 17:45:54,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-10-14 17:45:54,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 17:45:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:45:54,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439332303] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:54,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:54,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-10-14 17:45:54,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924160241] [2024-10-14 17:45:54,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:54,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-14 17:45:54,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:54,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-14 17:45:54,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1112, Unknown=1, NotChecked=0, Total=1260 [2024-10-14 17:45:54,996 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:55,262 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_int#0| |c_ULTIMATE.start_cstrlcpy_#t~post6#1.base|))) (let ((.cse2 (+ |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 1)) (.cse5 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_#t~post6#1.base|)) (.cse0 (select |c_#memory_int#0| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse1 (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) (.cse4 (= (select .cse6 |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) 0))) (and (forall ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43| Int)) (or (= (select .cse0 (+ 2 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43|)) 0) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43|) 0) (< (+ 3 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43|) .cse1) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43| 0) (< |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43|) (= (select .cse0 (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_43| 1)) 0))) (= |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset| 0) (<= 0 |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset|) (= .cse2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= (select .cse0 .cse3) 0) (or (and (<= 0 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= .cse3 .cse1)) .cse4) (= |c_ULTIMATE.start_cstrlcpy_#t~post6#1.base| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= .cse2 .cse5) (exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.offset_33| Int) (|v_ULTIMATE.start_main_~length~0#1_28| Int)) (and (<= (+ |v_ULTIMATE.start_main_~nondetString2~0#1.offset_33| |v_ULTIMATE.start_main_~length~0#1_28|) .cse5) (<= |c_ULTIMATE.start_cstrlcpy_#t~post6#1.offset| |v_ULTIMATE.start_main_~nondetString2~0#1.offset_33|) (<= 1 |v_ULTIMATE.start_main_~length~0#1_28|) (= (select .cse6 (+ (- 1) |v_ULTIMATE.start_main_~nondetString2~0#1.offset_33| |v_ULTIMATE.start_main_~length~0#1_28|)) 0))) (or (= (select .cse0 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0) (and (<= (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) .cse1) (<= 0 .cse3)) .cse4)))) is different from false [2024-10-14 17:45:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:56,141 INFO L93 Difference]: Finished difference Result 168 states and 185 transitions. [2024-10-14 17:45:56,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-14 17:45:56,142 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 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 31 [2024-10-14 17:45:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:56,142 INFO L225 Difference]: With dead ends: 168 [2024-10-14 17:45:56,142 INFO L226 Difference]: Without dead ends: 97 [2024-10-14 17:45:56,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=323, Invalid=2329, Unknown=4, NotChecked=100, Total=2756 [2024-10-14 17:45:56,144 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:56,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 481 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 683 Invalid, 0 Unknown, 30 Unchecked, 0.5s Time] [2024-10-14 17:45:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-14 17:45:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2024-10-14 17:45:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 94 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) [2024-10-14 17:45:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2024-10-14 17:45:56,147 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 31 [2024-10-14 17:45:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:56,147 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2024-10-14 17:45:56,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2024-10-14 17:45:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-14 17:45:56,148 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:56,148 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:56,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-14 17:45:56,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:56,348 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:56,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1840347137, now seen corresponding path program 3 times [2024-10-14 17:45:56,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:56,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590527992] [2024-10-14 17:45:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:56,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:45:56,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:56,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590527992] [2024-10-14 17:45:56,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590527992] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:56,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613481569] [2024-10-14 17:45:56,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:45:56,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:56,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:56,642 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) [2024-10-14 17:45:56,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 17:45:56,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 17:45:56,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:56,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-14 17:45:56,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:56,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:45:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:45:56,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:45:57,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613481569] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:57,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:57,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-10-14 17:45:57,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567342462] [2024-10-14 17:45:57,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:57,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 17:45:57,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 17:45:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-10-14 17:45:57,108 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:57,283 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2024-10-14 17:45:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 17:45:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 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 32 [2024-10-14 17:45:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:57,284 INFO L225 Difference]: With dead ends: 97 [2024-10-14 17:45:57,284 INFO L226 Difference]: Without dead ends: 97 [2024-10-14 17:45:57,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2024-10-14 17:45:57,285 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:57,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 211 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-14 17:45:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2024-10-14 17:45:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 95 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) [2024-10-14 17:45:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2024-10-14 17:45:57,289 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 32 [2024-10-14 17:45:57,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:57,289 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2024-10-14 17:45:57,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2024-10-14 17:45:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-14 17:45:57,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:57,289 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:57,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:57,490 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,SelfDestructingSolverStorable41 [2024-10-14 17:45:57,490 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:57,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:57,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1216186384, now seen corresponding path program 2 times [2024-10-14 17:45:57,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:57,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490211861] [2024-10-14 17:45:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:45:57,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490211861] [2024-10-14 17:45:57,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490211861] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140432232] [2024-10-14 17:45:57,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:45:57,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:57,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:57,743 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) [2024-10-14 17:45:57,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 17:45:57,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:45:57,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:57,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-14 17:45:57,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:45:57,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:58,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 17:45:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:45:58,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140432232] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:58,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:58,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2024-10-14 17:45:58,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81566618] [2024-10-14 17:45:58,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:58,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 17:45:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:58,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 17:45:58,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-10-14 17:45:58,175 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:58,385 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2024-10-14 17:45:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 17:45:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 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 33 [2024-10-14 17:45:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:58,386 INFO L225 Difference]: With dead ends: 100 [2024-10-14 17:45:58,386 INFO L226 Difference]: Without dead ends: 97 [2024-10-14 17:45:58,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:45:58,387 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 21 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:58,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 274 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:45:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-14 17:45:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2024-10-14 17:45:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 93 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2024-10-14 17:45:58,388 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 33 [2024-10-14 17:45:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:58,389 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2024-10-14 17:45:58,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2024-10-14 17:45:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 17:45:58,390 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:58,390 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:58,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 17:45:58,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:58,590 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:58,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1062266879, now seen corresponding path program 4 times [2024-10-14 17:45:58,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624355186] [2024-10-14 17:45:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:58,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:45:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 17:45:58,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:45:58,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624355186] [2024-10-14 17:45:58,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624355186] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:45:58,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991241156] [2024-10-14 17:45:58,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:45:58,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:58,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:45:58,852 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) [2024-10-14 17:45:58,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 17:45:58,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:45:58,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:45:58,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-14 17:45:58,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:45:59,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 17:45:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:45:59,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:45:59,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 17:45:59,189 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 16 treesize of output 12 [2024-10-14 17:45:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:45:59,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991241156] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:45:59,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:45:59,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-14 17:45:59,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431440394] [2024-10-14 17:45:59,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:45:59,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 17:45:59,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:45:59,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 17:45:59,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2024-10-14 17:45:59,240 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:45:59,669 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2024-10-14 17:45:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-14 17:45:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 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 37 [2024-10-14 17:45:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:45:59,669 INFO L225 Difference]: With dead ends: 137 [2024-10-14 17:45:59,669 INFO L226 Difference]: Without dead ends: 92 [2024-10-14 17:45:59,670 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=1278, Unknown=0, NotChecked=0, Total=1406 [2024-10-14 17:45:59,670 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:45:59,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 351 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:45:59,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-14 17:45:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2024-10-14 17:45:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.127906976744186) internal successors, (97), 89 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2024-10-14 17:45:59,672 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 37 [2024-10-14 17:45:59,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:45:59,672 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2024-10-14 17:45:59,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:45:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2024-10-14 17:45:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 17:45:59,673 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:45:59,673 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:45:59,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-14 17:45:59,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:45:59,875 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:45:59,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:45:59,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1437672899, now seen corresponding path program 1 times [2024-10-14 17:45:59,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:45:59,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748745968] [2024-10-14 17:45:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:45:59,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:45:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:00,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:00,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748745968] [2024-10-14 17:46:00,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748745968] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:00,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015461729] [2024-10-14 17:46:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:00,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:00,195 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) [2024-10-14 17:46:00,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 17:46:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:00,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-14 17:46:00,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:00,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:46:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:00,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:00,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015461729] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:00,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:00,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2024-10-14 17:46:00,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671508970] [2024-10-14 17:46:00,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:00,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-14 17:46:00,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-14 17:46:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:46:00,684 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 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) [2024-10-14 17:46:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:01,003 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2024-10-14 17:46:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 17:46:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 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 37 [2024-10-14 17:46:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:01,004 INFO L225 Difference]: With dead ends: 100 [2024-10-14 17:46:01,004 INFO L226 Difference]: Without dead ends: 100 [2024-10-14 17:46:01,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2024-10-14 17:46:01,005 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:01,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 366 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:46:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-14 17:46:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2024-10-14 17:46:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2024-10-14 17:46:01,007 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 37 [2024-10-14 17:46:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:01,007 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2024-10-14 17:46:01,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 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) [2024-10-14 17:46:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2024-10-14 17:46:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-14 17:46:01,007 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:01,008 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:01,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:01,208 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,SelfDestructingSolverStorable44 [2024-10-14 17:46:01,208 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:01,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:01,208 INFO L85 PathProgramCache]: Analyzing trace with hash 299509778, now seen corresponding path program 2 times [2024-10-14 17:46:01,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:01,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223838489] [2024-10-14 17:46:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:01,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:01,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:01,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223838489] [2024-10-14 17:46:01,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223838489] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:01,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127985704] [2024-10-14 17:46:01,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:46:01,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:01,558 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) [2024-10-14 17:46:01,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 17:46:01,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:46:01,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:01,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-14 17:46:01,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:01,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 17:46:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:01,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:01,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 17:46:01,821 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 16 treesize of output 12 [2024-10-14 17:46:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:01,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127985704] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:01,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:01,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 24 [2024-10-14 17:46:01,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125817241] [2024-10-14 17:46:01,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:01,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 17:46:01,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:01,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 17:46:01,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2024-10-14 17:46:01,869 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:02,147 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2024-10-14 17:46:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 17:46:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-14 17:46:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:02,148 INFO L225 Difference]: With dead ends: 177 [2024-10-14 17:46:02,148 INFO L226 Difference]: Without dead ends: 135 [2024-10-14 17:46:02,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2024-10-14 17:46:02,149 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 19 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:02,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 626 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:46:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-14 17:46:02,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2024-10-14 17:46:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.124031007751938) internal successors, (145), 132 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) [2024-10-14 17:46:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2024-10-14 17:46:02,151 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 40 [2024-10-14 17:46:02,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:02,151 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2024-10-14 17:46:02,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:02,152 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2024-10-14 17:46:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-14 17:46:02,152 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:02,152 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:02,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-14 17:46:02,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:02,353 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:02,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash -788105638, now seen corresponding path program 5 times [2024-10-14 17:46:02,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:02,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171741487] [2024-10-14 17:46:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:02,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:02,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:02,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171741487] [2024-10-14 17:46:02,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171741487] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:02,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674325954] [2024-10-14 17:46:02,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 17:46:02,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:02,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:02,734 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) [2024-10-14 17:46:02,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 17:46:02,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-14 17:46:02,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:02,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 17:46:02,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:02,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:46:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:03,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:03,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674325954] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:03,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:03,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2024-10-14 17:46:03,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526760939] [2024-10-14 17:46:03,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:03,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 17:46:03,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:03,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 17:46:03,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-10-14 17:46:03,381 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 26 states, 25 states have (on average 3.6) internal successors, (90), 26 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) [2024-10-14 17:46:03,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:03,614 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2024-10-14 17:46:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 17:46:03,615 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.6) internal successors, (90), 26 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 41 [2024-10-14 17:46:03,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:03,615 INFO L225 Difference]: With dead ends: 135 [2024-10-14 17:46:03,615 INFO L226 Difference]: Without dead ends: 135 [2024-10-14 17:46:03,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2024-10-14 17:46:03,616 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:03,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 316 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:46:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-14 17:46:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2024-10-14 17:46:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.123076923076923) internal successors, (146), 133 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2024-10-14 17:46:03,618 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 41 [2024-10-14 17:46:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:03,619 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2024-10-14 17:46:03,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.6) internal successors, (90), 26 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) [2024-10-14 17:46:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2024-10-14 17:46:03,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 17:46:03,619 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:03,619 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:03,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:03,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:03,820 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:03,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1338529013, now seen corresponding path program 3 times [2024-10-14 17:46:03,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:03,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665486466] [2024-10-14 17:46:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:03,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:04,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:04,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665486466] [2024-10-14 17:46:04,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665486466] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:04,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789665324] [2024-10-14 17:46:04,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:46:04,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:04,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:04,144 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) [2024-10-14 17:46:04,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-14 17:46:04,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 17:46:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:04,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-14 17:46:04,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:04,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:04,627 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 7 treesize of output 5 [2024-10-14 17:46:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:04,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789665324] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:04,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:04,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-10-14 17:46:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049427476] [2024-10-14 17:46:04,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:04,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-14 17:46:04,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:04,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-14 17:46:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2024-10-14 17:46:04,668 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 32 states, 31 states have (on average 3.064516129032258) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:05,042 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2024-10-14 17:46:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 17:46:05,043 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.064516129032258) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 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 42 [2024-10-14 17:46:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:05,043 INFO L225 Difference]: With dead ends: 141 [2024-10-14 17:46:05,043 INFO L226 Difference]: Without dead ends: 138 [2024-10-14 17:46:05,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2024-10-14 17:46:05,044 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 27 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:05,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 568 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:46:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-14 17:46:05,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2024-10-14 17:46:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.109375) internal successors, (142), 131 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) [2024-10-14 17:46:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2024-10-14 17:46:05,049 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 42 [2024-10-14 17:46:05,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:05,049 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2024-10-14 17:46:05,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.064516129032258) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2024-10-14 17:46:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 17:46:05,050 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:05,050 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:05,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:05,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:05,250 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:05,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:05,251 INFO L85 PathProgramCache]: Analyzing trace with hash 142022304, now seen corresponding path program 3 times [2024-10-14 17:46:05,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:05,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536537884] [2024-10-14 17:46:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:05,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:05,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:05,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536537884] [2024-10-14 17:46:05,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536537884] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:05,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499212749] [2024-10-14 17:46:05,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:46:05,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:05,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:05,604 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) [2024-10-14 17:46:05,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-14 17:46:05,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 17:46:05,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:05,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-14 17:46:05,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:05,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-14 17:46:07,072 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-10-14 17:46:07,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2024-10-14 17:46:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:46:07,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:07,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2024-10-14 17:46:07,893 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 15 treesize of output 11 [2024-10-14 17:46:07,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:46:07,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2024-10-14 17:46:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:46:07,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499212749] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:07,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:07,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 36 [2024-10-14 17:46:07,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160269751] [2024-10-14 17:46:07,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:07,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-14 17:46:07,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:07,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-14 17:46:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1144, Unknown=1, NotChecked=0, Total=1332 [2024-10-14 17:46:07,970 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 37 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) [2024-10-14 17:46:10,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:46:15,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:46:24,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:46:28,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:46:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:32,567 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2024-10-14 17:46:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-14 17:46:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 37 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 42 [2024-10-14 17:46:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:32,568 INFO L225 Difference]: With dead ends: 154 [2024-10-14 17:46:32,568 INFO L226 Difference]: Without dead ends: 105 [2024-10-14 17:46:32,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=479, Invalid=3057, Unknown=4, NotChecked=0, Total=3540 [2024-10-14 17:46:32,569 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 63 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 8 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:32,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 535 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 853 Invalid, 10 Unknown, 0 Unchecked, 14.1s Time] [2024-10-14 17:46:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-14 17:46:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2024-10-14 17:46:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.12) internal successors, (112), 103 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2024-10-14 17:46:32,571 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 42 [2024-10-14 17:46:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:32,571 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2024-10-14 17:46:32,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 37 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) [2024-10-14 17:46:32,572 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2024-10-14 17:46:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-14 17:46:32,572 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:32,572 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:32,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-14 17:46:32,772 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,SelfDestructingSolverStorable48 [2024-10-14 17:46:32,773 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:32,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:32,773 INFO L85 PathProgramCache]: Analyzing trace with hash -653989242, now seen corresponding path program 6 times [2024-10-14 17:46:32,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:32,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851484304] [2024-10-14 17:46:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:32,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 17:46:32,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:32,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851484304] [2024-10-14 17:46:32,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851484304] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:32,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297516794] [2024-10-14 17:46:32,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 17:46:32,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:32,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:32,999 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) [2024-10-14 17:46:32,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-14 17:46:33,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-14 17:46:33,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:33,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-14 17:46:33,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:33,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 17:46:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:33,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:33,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 17:46:33,647 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 16 treesize of output 12 [2024-10-14 17:46:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:33,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297516794] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:33,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:33,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 36 [2024-10-14 17:46:33,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594676180] [2024-10-14 17:46:33,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:33,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-14 17:46:33,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:33,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-14 17:46:33,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:46:33,801 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:34,489 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2024-10-14 17:46:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-14 17:46:34,489 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-14 17:46:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:34,490 INFO L225 Difference]: With dead ends: 154 [2024-10-14 17:46:34,490 INFO L226 Difference]: Without dead ends: 98 [2024-10-14 17:46:34,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=2565, Unknown=0, NotChecked=0, Total=2756 [2024-10-14 17:46:34,491 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:34,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 487 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 17:46:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-14 17:46:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2024-10-14 17:46:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 95 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2024-10-14 17:46:34,492 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 46 [2024-10-14 17:46:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:34,492 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2024-10-14 17:46:34,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2024-10-14 17:46:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-14 17:46:34,493 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:34,493 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:34,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:34,693 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,SelfDestructingSolverStorable49 [2024-10-14 17:46:34,694 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:34,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash -502403315, now seen corresponding path program 7 times [2024-10-14 17:46:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:34,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572508614] [2024-10-14 17:46:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:34,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:35,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:35,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572508614] [2024-10-14 17:46:35,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572508614] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:35,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941048312] [2024-10-14 17:46:35,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 17:46:35,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:35,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:35,176 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) [2024-10-14 17:46:35,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-14 17:46:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:35,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-14 17:46:35,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 9 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:35,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:35,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 17:46:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 9 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:35,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941048312] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:35,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:35,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2024-10-14 17:46:35,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011532977] [2024-10-14 17:46:35,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:35,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-14 17:46:35,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:35,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-14 17:46:35,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:46:35,844 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 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) [2024-10-14 17:46:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:36,221 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2024-10-14 17:46:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 17:46:36,221 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 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 50 [2024-10-14 17:46:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:36,222 INFO L225 Difference]: With dead ends: 98 [2024-10-14 17:46:36,222 INFO L226 Difference]: Without dead ends: 98 [2024-10-14 17:46:36,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 17:46:36,222 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:36,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 321 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:46:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-14 17:46:36,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2024-10-14 17:46:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.118279569892473) internal successors, (104), 96 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2024-10-14 17:46:36,225 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 50 [2024-10-14 17:46:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:36,225 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2024-10-14 17:46:36,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 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) [2024-10-14 17:46:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2024-10-14 17:46:36,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-14 17:46:36,226 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:36,226 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:36,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-14 17:46:36,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:36,427 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:36,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:36,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1605366434, now seen corresponding path program 4 times [2024-10-14 17:46:36,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:36,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620537454] [2024-10-14 17:46:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:36,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:36,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620537454] [2024-10-14 17:46:36,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620537454] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90274806] [2024-10-14 17:46:36,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:46:36,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:36,850 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) [2024-10-14 17:46:36,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-14 17:46:37,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:46:37,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:37,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-14 17:46:37,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:37,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:37,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-10-14 17:46:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:37,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90274806] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:37,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:37,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2024-10-14 17:46:37,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277483710] [2024-10-14 17:46:37,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:37,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-14 17:46:37,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-14 17:46:37,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2024-10-14 17:46:37,717 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 37 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 37 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) [2024-10-14 17:46:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:38,078 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2024-10-14 17:46:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 17:46:38,079 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 37 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) Word has length 51 [2024-10-14 17:46:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:38,079 INFO L225 Difference]: With dead ends: 101 [2024-10-14 17:46:38,079 INFO L226 Difference]: Without dead ends: 101 [2024-10-14 17:46:38,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2024-10-14 17:46:38,080 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 13 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:38,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 541 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:46:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-14 17:46:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2024-10-14 17:46:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2024-10-14 17:46:38,082 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 51 [2024-10-14 17:46:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:38,082 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2024-10-14 17:46:38,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 37 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) [2024-10-14 17:46:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2024-10-14 17:46:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-14 17:46:38,082 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:38,083 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:38,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:38,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:38,286 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:38,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:38,286 INFO L85 PathProgramCache]: Analyzing trace with hash 932802563, now seen corresponding path program 4 times [2024-10-14 17:46:38,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:38,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854478728] [2024-10-14 17:46:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:38,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:39,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:39,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854478728] [2024-10-14 17:46:39,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854478728] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:39,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795131966] [2024-10-14 17:46:39,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:46:39,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:39,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:39,684 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) [2024-10-14 17:46:39,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-14 17:46:39,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:46:39,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:39,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-14 17:46:39,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:40,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 17:46:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:40,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:40,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 17:46:40,191 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 16 treesize of output 12 [2024-10-14 17:46:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:40,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795131966] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:40,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:40,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 16] total 34 [2024-10-14 17:46:40,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421897953] [2024-10-14 17:46:40,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:40,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-14 17:46:40,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:40,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-14 17:46:40,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1038, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 17:46:40,274 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:41,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:41,376 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2024-10-14 17:46:41,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 17:46:41,377 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 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 53 [2024-10-14 17:46:41,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:41,377 INFO L225 Difference]: With dead ends: 171 [2024-10-14 17:46:41,377 INFO L226 Difference]: Without dead ends: 138 [2024-10-14 17:46:41,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=210, Invalid=2240, Unknown=0, NotChecked=0, Total=2450 [2024-10-14 17:46:41,378 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:41,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 597 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:46:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-14 17:46:41,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2024-10-14 17:46:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 135 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2024-10-14 17:46:41,380 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 53 [2024-10-14 17:46:41,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:41,381 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2024-10-14 17:46:41,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2024-10-14 17:46:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-14 17:46:41,381 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:41,381 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:41,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-14 17:46:41,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:41,582 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:41,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1264314803, now seen corresponding path program 8 times [2024-10-14 17:46:41,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:41,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728266496] [2024-10-14 17:46:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:41,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 26 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 17:46:41,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:41,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728266496] [2024-10-14 17:46:41,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728266496] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:41,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247261597] [2024-10-14 17:46:41,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:46:41,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:41,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:41,827 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) [2024-10-14 17:46:41,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-14 17:46:41,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:46:41,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:41,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-14 17:46:41,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:42,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-14 17:46:42,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:46:42,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-10-14 17:46:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:42,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:43,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 17:46:43,199 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 [2024-10-14 17:46:43,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 17:46:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:43,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247261597] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:43,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:43,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2024-10-14 17:46:43,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386382155] [2024-10-14 17:46:43,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:43,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-14 17:46:43,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:43,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-14 17:46:43,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2024-10-14 17:46:43,288 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 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) [2024-10-14 17:46:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:44,877 INFO L93 Difference]: Finished difference Result 204 states and 214 transitions. [2024-10-14 17:46:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-14 17:46:44,877 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 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) Word has length 55 [2024-10-14 17:46:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:44,878 INFO L225 Difference]: With dead ends: 204 [2024-10-14 17:46:44,878 INFO L226 Difference]: Without dead ends: 177 [2024-10-14 17:46:44,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=315, Invalid=3845, Unknown=0, NotChecked=0, Total=4160 [2024-10-14 17:46:44,878 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:44,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 532 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-14 17:46:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-14 17:46:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2024-10-14 17:46:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.0843373493975903) internal successors, (180), 169 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) [2024-10-14 17:46:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 180 transitions. [2024-10-14 17:46:44,882 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 180 transitions. Word has length 55 [2024-10-14 17:46:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:44,882 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 180 transitions. [2024-10-14 17:46:44,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 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) [2024-10-14 17:46:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 180 transitions. [2024-10-14 17:46:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-14 17:46:44,883 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:44,883 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:44,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:45,083 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,SelfDestructingSolverStorable53 [2024-10-14 17:46:45,083 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:45,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:45,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1492457525, now seen corresponding path program 5 times [2024-10-14 17:46:45,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:45,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153338163] [2024-10-14 17:46:45,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:45,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 44 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:45,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:45,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153338163] [2024-10-14 17:46:45,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153338163] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:45,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348704357] [2024-10-14 17:46:45,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 17:46:45,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:45,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:45,526 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) [2024-10-14 17:46:45,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-14 17:46:45,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-14 17:46:45,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:45,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-14 17:46:45,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:45,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:46:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 16 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:46,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 16 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:46,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348704357] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:46,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:46,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 35 [2024-10-14 17:46:46,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696707068] [2024-10-14 17:46:46,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:46,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-14 17:46:46,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-14 17:46:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:46:46,515 INFO L87 Difference]: Start difference. First operand 170 states and 180 transitions. Second operand has 36 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 36 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:46,861 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2024-10-14 17:46:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 17:46:46,862 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 36 states have internal predecessors, (122), 0 states have call successors, (0), 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 55 [2024-10-14 17:46:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:46,862 INFO L225 Difference]: With dead ends: 182 [2024-10-14 17:46:46,862 INFO L226 Difference]: Without dead ends: 182 [2024-10-14 17:46:46,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2024-10-14 17:46:46,863 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 36 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:46,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 355 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:46:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-14 17:46:46,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2024-10-14 17:46:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 177 states have (on average 1.0903954802259888) internal successors, (193), 180 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 193 transitions. [2024-10-14 17:46:46,866 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 193 transitions. Word has length 55 [2024-10-14 17:46:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:46,866 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 193 transitions. [2024-10-14 17:46:46,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 36 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 193 transitions. [2024-10-14 17:46:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-14 17:46:46,867 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:46,867 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:46,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:47,067 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,SelfDestructingSolverStorable54 [2024-10-14 17:46:47,067 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:47,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:47,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1206090805, now seen corresponding path program 5 times [2024-10-14 17:46:47,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:47,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751704618] [2024-10-14 17:46:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:47,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:47,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751704618] [2024-10-14 17:46:47,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751704618] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885805901] [2024-10-14 17:46:47,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 17:46:47,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:47,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:47,572 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) [2024-10-14 17:46:47,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-14 17:46:48,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-14 17:46:48,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:48,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-14 17:46:48,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:48,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:48,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-10-14 17:46:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:46:48,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885805901] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:48,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:48,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2024-10-14 17:46:48,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584978302] [2024-10-14 17:46:48,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:48,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-14 17:46:48,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:48,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-14 17:46:48,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2024-10-14 17:46:48,778 INFO L87 Difference]: Start difference. First operand 181 states and 193 transitions. Second operand has 42 states, 41 states have (on average 3.048780487804878) internal successors, (125), 42 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) [2024-10-14 17:46:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:49,194 INFO L93 Difference]: Finished difference Result 191 states and 202 transitions. [2024-10-14 17:46:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-14 17:46:49,194 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.048780487804878) internal successors, (125), 42 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) Word has length 58 [2024-10-14 17:46:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:49,194 INFO L225 Difference]: With dead ends: 191 [2024-10-14 17:46:49,195 INFO L226 Difference]: Without dead ends: 191 [2024-10-14 17:46:49,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2024-10-14 17:46:49,195 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 31 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:49,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 583 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:46:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-10-14 17:46:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 185. [2024-10-14 17:46:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 1.0828729281767955) internal successors, (196), 184 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 196 transitions. [2024-10-14 17:46:49,200 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 196 transitions. Word has length 58 [2024-10-14 17:46:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:49,200 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 196 transitions. [2024-10-14 17:46:49,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.048780487804878) internal successors, (125), 42 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) [2024-10-14 17:46:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 196 transitions. [2024-10-14 17:46:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-14 17:46:49,200 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:49,200 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:49,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:49,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:49,405 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:49,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:49,405 INFO L85 PathProgramCache]: Analyzing trace with hash 300730464, now seen corresponding path program 6 times [2024-10-14 17:46:49,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:49,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025704149] [2024-10-14 17:46:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:49,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:49,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:49,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025704149] [2024-10-14 17:46:49,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025704149] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:49,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830073434] [2024-10-14 17:46:49,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 17:46:49,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:49,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:49,902 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) [2024-10-14 17:46:49,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-14 17:46:50,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-14 17:46:50,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:50,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-14 17:46:50,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:50,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 17:46:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:50,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:50,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 17:46:50,451 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 16 treesize of output 12 [2024-10-14 17:46:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:50,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830073434] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:50,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:50,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 30 [2024-10-14 17:46:50,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117270351] [2024-10-14 17:46:50,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:50,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 17:46:50,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:50,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 17:46:50,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2024-10-14 17:46:50,521 INFO L87 Difference]: Start difference. First operand 185 states and 196 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:50,910 INFO L93 Difference]: Finished difference Result 296 states and 313 transitions. [2024-10-14 17:46:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-14 17:46:50,911 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 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 58 [2024-10-14 17:46:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:50,911 INFO L225 Difference]: With dead ends: 296 [2024-10-14 17:46:50,912 INFO L226 Difference]: Without dead ends: 231 [2024-10-14 17:46:50,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2024-10-14 17:46:50,912 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 18 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:50,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 928 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:46:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-10-14 17:46:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2024-10-14 17:46:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 226 states have (on average 1.075221238938053) internal successors, (243), 229 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 243 transitions. [2024-10-14 17:46:50,916 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 243 transitions. Word has length 58 [2024-10-14 17:46:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:50,917 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 243 transitions. [2024-10-14 17:46:50,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 243 transitions. [2024-10-14 17:46:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-14 17:46:50,917 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:50,918 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:50,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:51,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:51,118 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:51,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:51,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1796444306, now seen corresponding path program 7 times [2024-10-14 17:46:51,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:51,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254422813] [2024-10-14 17:46:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:51,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:51,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:51,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254422813] [2024-10-14 17:46:51,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254422813] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:51,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378568751] [2024-10-14 17:46:51,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 17:46:51,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:51,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:51,642 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) [2024-10-14 17:46:51,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-14 17:46:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:51,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-10-14 17:46:51,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:51,789 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 [2024-10-14 17:46:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:52,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:52,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378568751] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:52,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:52,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2024-10-14 17:46:52,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789331167] [2024-10-14 17:46:52,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:52,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-14 17:46:52,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:52,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-14 17:46:52,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1574, Unknown=0, NotChecked=0, Total=1806 [2024-10-14 17:46:52,561 INFO L87 Difference]: Start difference. First operand 230 states and 243 transitions. Second operand has 43 states, 42 states have (on average 3.1904761904761907) internal successors, (134), 43 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:53,112 INFO L93 Difference]: Finished difference Result 242 states and 256 transitions. [2024-10-14 17:46:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 17:46:53,112 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.1904761904761907) internal successors, (134), 43 states have internal predecessors, (134), 0 states have call successors, (0), 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 60 [2024-10-14 17:46:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:53,113 INFO L225 Difference]: With dead ends: 242 [2024-10-14 17:46:53,113 INFO L226 Difference]: Without dead ends: 242 [2024-10-14 17:46:53,113 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=284, Invalid=1972, Unknown=0, NotChecked=0, Total=2256 [2024-10-14 17:46:53,113 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 61 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:53,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 689 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 17:46:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-10-14 17:46:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2024-10-14 17:46:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 237 states have (on average 1.080168776371308) internal successors, (256), 240 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 256 transitions. [2024-10-14 17:46:53,117 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 256 transitions. Word has length 60 [2024-10-14 17:46:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:53,117 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 256 transitions. [2024-10-14 17:46:53,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.1904761904761907) internal successors, (134), 43 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 256 transitions. [2024-10-14 17:46:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-14 17:46:53,118 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:53,118 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:53,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:53,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:53,319 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:53,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1084336911, now seen corresponding path program 1 times [2024-10-14 17:46:53,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:53,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119965399] [2024-10-14 17:46:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:53,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:54,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:54,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119965399] [2024-10-14 17:46:54,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119965399] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:54,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143925393] [2024-10-14 17:46:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:54,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:54,074 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:54,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-14 17:46:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:54,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-10-14 17:46:54,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:54,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 17:46:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-14 17:46:54,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:54,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 17:46:54,448 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 16 treesize of output 12 [2024-10-14 17:46:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-14 17:46:54,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143925393] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:54,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:54,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 32 [2024-10-14 17:46:54,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909227585] [2024-10-14 17:46:54,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:54,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-14 17:46:54,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-14 17:46:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2024-10-14 17:46:54,513 INFO L87 Difference]: Start difference. First operand 241 states and 256 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:54,868 INFO L93 Difference]: Finished difference Result 237 states and 250 transitions. [2024-10-14 17:46:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-14 17:46:54,868 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 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 61 [2024-10-14 17:46:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:54,869 INFO L225 Difference]: With dead ends: 237 [2024-10-14 17:46:54,869 INFO L226 Difference]: Without dead ends: 195 [2024-10-14 17:46:54,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:46:54,870 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:54,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 587 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:46:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-10-14 17:46:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2024-10-14 17:46:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.0837696335078535) internal successors, (207), 194 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 207 transitions. [2024-10-14 17:46:54,873 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 207 transitions. Word has length 61 [2024-10-14 17:46:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:54,873 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 207 transitions. [2024-10-14 17:46:54,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:54,874 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 207 transitions. [2024-10-14 17:46:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-14 17:46:54,874 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:54,874 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:54,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:55,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-10-14 17:46:55,075 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-10-14 17:46:55,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:55,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1715206791, now seen corresponding path program 8 times [2024-10-14 17:46:55,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:55,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102569581] [2024-10-14 17:46:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:55,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:55,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:55,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102569581] [2024-10-14 17:46:55,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102569581] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:55,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345359918] [2024-10-14 17:46:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:46:55,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:55,700 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:55,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-14 17:46:55,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:46:55,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:55,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-10-14 17:46:55,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:55,860 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 [2024-10-14 17:46:56,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-14 17:46:56,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:46:56,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-10-14 17:46:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 25 proven. 58 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:56,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:57,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 17:46:57,544 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 [2024-10-14 17:46:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 25 proven. 58 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:46:57,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345359918] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:57,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:57,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 59 [2024-10-14 17:46:57,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404201909] [2024-10-14 17:46:57,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:57,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-10-14 17:46:57,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-10-14 17:46:57,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3140, Unknown=0, NotChecked=0, Total=3422 [2024-10-14 17:46:57,909 INFO L87 Difference]: Start difference. First operand 195 states and 207 transitions. Second operand has 59 states, 59 states have (on average 2.8983050847457625) internal successors, (171), 59 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)