./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 16:12:12,611 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 16:12:12,659 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 16:12:12,662 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 16:12:12,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 16:12:12,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 16:12:12,688 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 16:12:12,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 16:12:12,689 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 16:12:12,692 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 16:12:12,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 16:12:12,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 16:12:12,692 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 16:12:12,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 16:12:12,693 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 16:12:12,693 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 16:12:12,693 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 16:12:12,693 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 16:12:12,693 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 16:12:12,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 16:12:12,693 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 16:12:12,695 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 16:12:12,696 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 16:12:12,696 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 16:12:12,696 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 16:12:12,696 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 16:12:12,696 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 16:12:12,696 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 16:12:12,697 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 16:12:12,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 16:12:12,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 16:12:12,697 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 16:12:12,697 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 16:12:12,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:12:12,697 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 16:12:12,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 16:12:12,698 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 16:12:12,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 16:12:12,698 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 16:12:12,698 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 16:12:12,698 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 16:12:12,699 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 16:12:12,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2024-10-24 16:12:12,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 16:12:12,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 16:12:12,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 16:12:12,894 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 16:12:12,894 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 16:12:12,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-10-24 16:12:14,131 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 16:12:14,263 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 16:12:14,263 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-10-24 16:12:14,269 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ef32c9d/f56ff297f4a94a4bbd1879ff038f5c3e/FLAG077bfcb64 [2024-10-24 16:12:14,685 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ef32c9d/f56ff297f4a94a4bbd1879ff038f5c3e [2024-10-24 16:12:14,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 16:12:14,689 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 16:12:14,690 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 16:12:14,690 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 16:12:14,695 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 16:12:14,696 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@887aaea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14, skipping insertion in model container [2024-10-24 16:12:14,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,715 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 16:12:14,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:12:14,897 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 16:12:14,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:12:14,925 INFO L204 MainTranslator]: Completed translation [2024-10-24 16:12:14,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14 WrapperNode [2024-10-24 16:12:14,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 16:12:14,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 16:12:14,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 16:12:14,926 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 16:12:14,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,938 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,957 INFO L138 Inliner]: procedures = 22, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2024-10-24 16:12:14,958 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 16:12:14,958 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 16:12:14,958 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 16:12:14,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 16:12:14,966 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,968 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,980 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-10-24 16:12:14,980 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,985 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,987 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,988 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,989 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,991 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 16:12:14,991 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 16:12:14,991 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 16:12:14,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 16:12:14,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (1/1) ... [2024-10-24 16:12:14,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:12:15,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:15,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 16:12:15,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 16:12:15,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 16:12:15,052 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-24 16:12:15,053 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-24 16:12:15,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 16:12:15,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 16:12:15,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 16:12:15,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 16:12:15,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 16:12:15,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 16:12:15,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 16:12:15,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 16:12:15,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 16:12:15,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-10-24 16:12:15,055 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-10-24 16:12:15,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 16:12:15,141 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 16:12:15,142 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 16:12:15,453 INFO L? ?]: Removed 113 outVars from TransFormulas that were not future-live. [2024-10-24 16:12:15,453 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 16:12:15,486 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 16:12:15,487 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-24 16:12:15,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:12:15 BoogieIcfgContainer [2024-10-24 16:12:15,487 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 16:12:15,490 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 16:12:15,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 16:12:15,493 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 16:12:15,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:12:14" (1/3) ... [2024-10-24 16:12:15,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b4f336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:12:15, skipping insertion in model container [2024-10-24 16:12:15,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:12:14" (2/3) ... [2024-10-24 16:12:15,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b4f336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:12:15, skipping insertion in model container [2024-10-24 16:12:15,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:12:15" (3/3) ... [2024-10-24 16:12:15,496 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2024-10-24 16:12:15,509 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 16:12:15,509 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-10-24 16:12:15,541 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 16:12:15,546 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;@6ef78331, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 16:12:15,546 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-10-24 16:12:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 80 states have internal predecessors, (96), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:12:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 16:12:15,556 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:15,556 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:15,557 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:15,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:15,560 INFO L85 PathProgramCache]: Analyzing trace with hash 659165774, now seen corresponding path program 1 times [2024-10-24 16:12:15,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:15,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292000757] [2024-10-24 16:12:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:15,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:15,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:15,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:15,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:15,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:15,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:15,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292000757] [2024-10-24 16:12:15,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292000757] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:15,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:15,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:12:15,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006404914] [2024-10-24 16:12:15,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:15,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:12:15,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:15,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:12:15,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:12:15,767 INFO L87 Difference]: Start difference. First operand has 87 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 80 states have internal predecessors, (96), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 16:12:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:15,850 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2024-10-24 16:12:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:12:15,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2024-10-24 16:12:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:15,859 INFO L225 Difference]: With dead ends: 87 [2024-10-24 16:12:15,859 INFO L226 Difference]: Without dead ends: 86 [2024-10-24 16:12:15,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:12:15,865 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 3 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:15,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 143 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-24 16:12:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-10-24 16:12:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 79 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:12:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2024-10-24 16:12:15,897 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 25 [2024-10-24 16:12:15,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:15,897 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2024-10-24 16:12:15,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 16:12:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2024-10-24 16:12:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 16:12:15,898 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:15,898 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:15,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 16:12:15,899 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:15,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:15,899 INFO L85 PathProgramCache]: Analyzing trace with hash -133096758, now seen corresponding path program 1 times [2024-10-24 16:12:15,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:15,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199864266] [2024-10-24 16:12:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:15,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:16,119 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:16,123 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:16,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:16,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:16,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:16,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199864266] [2024-10-24 16:12:16,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199864266] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:16,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:16,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:12:16,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213982102] [2024-10-24 16:12:16,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:16,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:12:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:12:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:16,163 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:16,312 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2024-10-24 16:12:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:12:16,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-10-24 16:12:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:16,314 INFO L225 Difference]: With dead ends: 84 [2024-10-24 16:12:16,314 INFO L226 Difference]: Without dead ends: 84 [2024-10-24 16:12:16,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:16,315 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 64 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:16,315 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 146 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-24 16:12:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-10-24 16:12:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.826086956521739) internal successors, (84), 77 states have internal predecessors, (84), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:12:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2024-10-24 16:12:16,321 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 25 [2024-10-24 16:12:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:16,322 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2024-10-24 16:12:16,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2024-10-24 16:12:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 16:12:16,324 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:16,324 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:16,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 16:12:16,325 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:16,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:16,325 INFO L85 PathProgramCache]: Analyzing trace with hash -133096757, now seen corresponding path program 1 times [2024-10-24 16:12:16,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:16,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442978149] [2024-10-24 16:12:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:16,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:16,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:16,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:16,773 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:16,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 16:12:16,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:16,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442978149] [2024-10-24 16:12:16,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442978149] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:16,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:16,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-24 16:12:16,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677638130] [2024-10-24 16:12:16,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:16,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 16:12:16,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:16,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 16:12:16,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-24 16:12:16,792 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:12:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:17,073 INFO L93 Difference]: Finished difference Result 138 states and 157 transitions. [2024-10-24 16:12:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 16:12:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2024-10-24 16:12:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:17,076 INFO L225 Difference]: With dead ends: 138 [2024-10-24 16:12:17,076 INFO L226 Difference]: Without dead ends: 138 [2024-10-24 16:12:17,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-10-24 16:12:17,077 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 106 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:17,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 432 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:12:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-24 16:12:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2024-10-24 16:12:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 84 states have internal predecessors, (93), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2024-10-24 16:12:17,086 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 25 [2024-10-24 16:12:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:17,086 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2024-10-24 16:12:17,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:12:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2024-10-24 16:12:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 16:12:17,087 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:17,087 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:17,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 16:12:17,087 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:17,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:17,088 INFO L85 PathProgramCache]: Analyzing trace with hash 168967805, now seen corresponding path program 1 times [2024-10-24 16:12:17,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:17,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905516461] [2024-10-24 16:12:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:17,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:17,143 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:17,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:17,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:17,155 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:17,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:17,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905516461] [2024-10-24 16:12:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905516461] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:17,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:17,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:12:17,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51207601] [2024-10-24 16:12:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:17,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:12:17,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:12:17,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:17,164 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 16:12:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:17,255 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2024-10-24 16:12:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:12:17,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-10-24 16:12:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:17,257 INFO L225 Difference]: With dead ends: 93 [2024-10-24 16:12:17,258 INFO L226 Difference]: Without dead ends: 93 [2024-10-24 16:12:17,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:17,259 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 63 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:17,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 156 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-24 16:12:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-10-24 16:12:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 83 states have internal predecessors, (92), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2024-10-24 16:12:17,267 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 26 [2024-10-24 16:12:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:17,267 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2024-10-24 16:12:17,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 16:12:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2024-10-24 16:12:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 16:12:17,268 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:17,268 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:17,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 16:12:17,268 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:17,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash 168967806, now seen corresponding path program 1 times [2024-10-24 16:12:17,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:17,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688289564] [2024-10-24 16:12:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:17,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:17,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:17,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:17,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:17,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:17,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:17,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688289564] [2024-10-24 16:12:17,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688289564] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:17,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:17,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 16:12:17,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229187675] [2024-10-24 16:12:17,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:17,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 16:12:17,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 16:12:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:12:17,553 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:17,783 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2024-10-24 16:12:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:12:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2024-10-24 16:12:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:17,784 INFO L225 Difference]: With dead ends: 96 [2024-10-24 16:12:17,784 INFO L226 Difference]: Without dead ends: 96 [2024-10-24 16:12:17,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:12:17,784 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 5 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:17,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 306 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:12:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-24 16:12:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-10-24 16:12:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 86 states have internal predecessors, (97), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2024-10-24 16:12:17,788 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 26 [2024-10-24 16:12:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:17,789 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2024-10-24 16:12:17,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2024-10-24 16:12:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 16:12:17,789 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:17,789 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:17,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 16:12:17,789 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:17,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:17,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1865611460, now seen corresponding path program 1 times [2024-10-24 16:12:17,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:17,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794054796] [2024-10-24 16:12:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:17,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:18,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:18,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:18,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:18,083 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 16:12:18,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794054796] [2024-10-24 16:12:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794054796] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239691360] [2024-10-24 16:12:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:18,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:18,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:18,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:18,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 16:12:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:18,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 16:12:18,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:18,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-24 16:12:18,260 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 [2024-10-24 16:12:18,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:12:18,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 16:12:18,375 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:12:18,375 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 11 treesize of output 11 [2024-10-24 16:12:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:12:18,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:18,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239691360] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:18,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:12:18,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2024-10-24 16:12:18,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090772591] [2024-10-24 16:12:18,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:18,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 16:12:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:18,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 16:12:18,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-10-24 16:12:18,759 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 16:12:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:19,844 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2024-10-24 16:12:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 16:12:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 26 [2024-10-24 16:12:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:19,845 INFO L225 Difference]: With dead ends: 139 [2024-10-24 16:12:19,846 INFO L226 Difference]: Without dead ends: 139 [2024-10-24 16:12:19,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2024-10-24 16:12:19,847 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 249 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:19,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 511 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-24 16:12:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-24 16:12:19,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 97. [2024-10-24 16:12:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.6551724137931034) internal successors, (96), 87 states have internal predecessors, (96), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2024-10-24 16:12:19,853 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 26 [2024-10-24 16:12:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:19,854 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2024-10-24 16:12:19,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 16:12:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2024-10-24 16:12:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 16:12:19,859 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:19,859 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:19,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 16:12:20,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-24 16:12:20,060 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:20,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash -832196833, now seen corresponding path program 1 times [2024-10-24 16:12:20,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:20,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591818499] [2024-10-24 16:12:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:20,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:20,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591818499] [2024-10-24 16:12:20,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591818499] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:20,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:20,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 16:12:20,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735101726] [2024-10-24 16:12:20,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:20,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:12:20,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:12:20,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:12:20,135 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:20,256 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2024-10-24 16:12:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:12:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-10-24 16:12:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:20,257 INFO L225 Difference]: With dead ends: 91 [2024-10-24 16:12:20,257 INFO L226 Difference]: Without dead ends: 91 [2024-10-24 16:12:20,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:12:20,258 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 66 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:20,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 159 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-24 16:12:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-10-24 16:12:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 81 states have internal predecessors, (90), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2024-10-24 16:12:20,262 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 28 [2024-10-24 16:12:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:20,262 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2024-10-24 16:12:20,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2024-10-24 16:12:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 16:12:20,263 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:20,263 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:20,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 16:12:20,263 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:20,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:20,264 INFO L85 PathProgramCache]: Analyzing trace with hash -832196832, now seen corresponding path program 1 times [2024-10-24 16:12:20,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:20,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743327363] [2024-10-24 16:12:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:20,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,414 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,417 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 16:12:20,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:20,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743327363] [2024-10-24 16:12:20,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743327363] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:20,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:20,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-24 16:12:20,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723559725] [2024-10-24 16:12:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:20,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 16:12:20,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:20,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 16:12:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:12:20,422 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:20,578 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2024-10-24 16:12:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 16:12:20,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-10-24 16:12:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:20,579 INFO L225 Difference]: With dead ends: 125 [2024-10-24 16:12:20,579 INFO L226 Difference]: Without dead ends: 125 [2024-10-24 16:12:20,579 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-24 16:12:20,580 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 167 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:20,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 393 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-24 16:12:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2024-10-24 16:12:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 81 states have internal predecessors, (89), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2024-10-24 16:12:20,587 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 28 [2024-10-24 16:12:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:20,587 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2024-10-24 16:12:20,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2024-10-24 16:12:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-24 16:12:20,588 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:20,588 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:20,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 16:12:20,588 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:20,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:20,588 INFO L85 PathProgramCache]: Analyzing trace with hash 23156164, now seen corresponding path program 1 times [2024-10-24 16:12:20,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:20,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273206778] [2024-10-24 16:12:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:20,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,820 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:20,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:20,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273206778] [2024-10-24 16:12:20,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273206778] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:20,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389439230] [2024-10-24 16:12:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:20,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:20,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:20,830 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:20,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 16:12:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:20,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-24 16:12:20,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:20,898 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 10 treesize of output 9 [2024-10-24 16:12:20,993 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-24 16:12:20,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-10-24 16:12:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:21,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:21,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389439230] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:21,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:12:21,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-10-24 16:12:21,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103242668] [2024-10-24 16:12:21,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:21,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 16:12:21,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:21,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 16:12:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-24 16:12:21,508 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:12:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:21,925 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2024-10-24 16:12:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:12:21,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2024-10-24 16:12:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:21,926 INFO L225 Difference]: With dead ends: 90 [2024-10-24 16:12:21,926 INFO L226 Difference]: Without dead ends: 90 [2024-10-24 16:12:21,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-10-24 16:12:21,927 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 75 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:21,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 317 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:12:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-24 16:12:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2024-10-24 16:12:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 77 states have internal predecessors, (85), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2024-10-24 16:12:21,930 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 29 [2024-10-24 16:12:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:21,930 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2024-10-24 16:12:21,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:12:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2024-10-24 16:12:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-24 16:12:21,931 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:21,931 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1] [2024-10-24 16:12:21,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:22,131 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,SelfDestructingSolverStorable8 [2024-10-24 16:12:22,132 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:22,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:22,132 INFO L85 PathProgramCache]: Analyzing trace with hash 776735974, now seen corresponding path program 1 times [2024-10-24 16:12:22,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:22,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213374011] [2024-10-24 16:12:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:22,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:22,299 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:22,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:22,308 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:22,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:22,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:22,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213374011] [2024-10-24 16:12:22,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213374011] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:22,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018172526] [2024-10-24 16:12:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:22,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:22,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:22,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:22,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 16:12:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:22,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 16:12:22,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:22,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:22,606 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 28 treesize of output 24 [2024-10-24 16:12:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:22,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018172526] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:22,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:22,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-10-24 16:12:22,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550934374] [2024-10-24 16:12:22,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:22,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 16:12:22,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:22,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 16:12:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2024-10-24 16:12:22,670 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:12:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:23,006 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2024-10-24 16:12:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 16:12:23,007 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 31 [2024-10-24 16:12:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:23,007 INFO L225 Difference]: With dead ends: 88 [2024-10-24 16:12:23,007 INFO L226 Difference]: Without dead ends: 88 [2024-10-24 16:12:23,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2024-10-24 16:12:23,008 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 135 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:23,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 507 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:12:23,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-24 16:12:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2024-10-24 16:12:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 55 states have (on average 1.509090909090909) internal successors, (83), 75 states have internal predecessors, (83), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2024-10-24 16:12:23,015 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 31 [2024-10-24 16:12:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:23,015 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2024-10-24 16:12:23,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:12:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2024-10-24 16:12:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-24 16:12:23,015 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:23,015 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1] [2024-10-24 16:12:23,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 16:12:23,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:23,220 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:23,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:23,220 INFO L85 PathProgramCache]: Analyzing trace with hash 776733223, now seen corresponding path program 1 times [2024-10-24 16:12:23,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:23,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989037922] [2024-10-24 16:12:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:23,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,273 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:23,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:23,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989037922] [2024-10-24 16:12:23,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989037922] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:23,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:23,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:12:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816871839] [2024-10-24 16:12:23,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:23,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:12:23,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:12:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:23,278 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:23,343 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2024-10-24 16:12:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:12:23,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2024-10-24 16:12:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:23,344 INFO L225 Difference]: With dead ends: 84 [2024-10-24 16:12:23,345 INFO L226 Difference]: Without dead ends: 84 [2024-10-24 16:12:23,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:12:23,345 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:23,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 140 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-24 16:12:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2024-10-24 16:12:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 72 states have internal predecessors, (80), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2024-10-24 16:12:23,349 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 31 [2024-10-24 16:12:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:23,350 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2024-10-24 16:12:23,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2024-10-24 16:12:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-24 16:12:23,353 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:23,353 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1] [2024-10-24 16:12:23,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-24 16:12:23,353 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:23,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash 776733224, now seen corresponding path program 1 times [2024-10-24 16:12:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:23,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613959533] [2024-10-24 16:12:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:23,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,407 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:23,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:23,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613959533] [2024-10-24 16:12:23,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613959533] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:23,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458059351] [2024-10-24 16:12:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:23,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:23,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:23,417 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:23,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 16:12:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 16:12:23,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:23,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:23,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458059351] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:23,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:23,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-10-24 16:12:23,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286296226] [2024-10-24 16:12:23,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:23,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 16:12:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 16:12:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:12:23,542 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:23,638 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2024-10-24 16:12:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:12:23,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2024-10-24 16:12:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:23,639 INFO L225 Difference]: With dead ends: 106 [2024-10-24 16:12:23,639 INFO L226 Difference]: Without dead ends: 106 [2024-10-24 16:12:23,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:12:23,640 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 24 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:23,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 355 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-24 16:12:23,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2024-10-24 16:12:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 78 states have internal predecessors, (87), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2024-10-24 16:12:23,642 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 31 [2024-10-24 16:12:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:23,642 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2024-10-24 16:12:23,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:23,643 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2024-10-24 16:12:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 16:12:23,643 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:23,643 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:23,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 16:12:23,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:23,848 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:23,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:23,848 INFO L85 PathProgramCache]: Analyzing trace with hash 658933410, now seen corresponding path program 2 times [2024-10-24 16:12:23,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:23,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953146642] [2024-10-24 16:12:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:23,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,991 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:23,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:24,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:24,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953146642] [2024-10-24 16:12:24,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953146642] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:24,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613819404] [2024-10-24 16:12:24,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:12:24,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:24,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:24,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 16:12:24,073 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:12:24,073 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:12:24,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-24 16:12:24,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:24,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:24,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-24 16:12:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:24,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613819404] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:24,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:24,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2024-10-24 16:12:24,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531165593] [2024-10-24 16:12:24,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:24,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 16:12:24,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:24,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 16:12:24,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-10-24 16:12:24,283 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:12:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:24,752 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2024-10-24 16:12:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 16:12:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2024-10-24 16:12:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:24,754 INFO L225 Difference]: With dead ends: 138 [2024-10-24 16:12:24,754 INFO L226 Difference]: Without dead ends: 138 [2024-10-24 16:12:24,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2024-10-24 16:12:24,755 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 280 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:24,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 495 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:12:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-24 16:12:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2024-10-24 16:12:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 89 states have internal predecessors, (106), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2024-10-24 16:12:24,759 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 34 [2024-10-24 16:12:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:24,759 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2024-10-24 16:12:24,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:12:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2024-10-24 16:12:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 16:12:24,761 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:24,761 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1] [2024-10-24 16:12:24,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:24,962 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,SelfDestructingSolverStorable12 [2024-10-24 16:12:24,962 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:24,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1538629502, now seen corresponding path program 1 times [2024-10-24 16:12:24,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:24,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049929945] [2024-10-24 16:12:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:24,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,045 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,054 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:25,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:25,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049929945] [2024-10-24 16:12:25,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049929945] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:25,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586988629] [2024-10-24 16:12:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:25,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:25,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:25,059 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:25,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 16:12:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 16:12:25,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:25,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:25,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586988629] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:25,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:25,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2024-10-24 16:12:25,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618385773] [2024-10-24 16:12:25,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:25,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 16:12:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:25,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 16:12:25,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:12:25,204 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:25,322 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2024-10-24 16:12:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:12:25,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-10-24 16:12:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:25,323 INFO L225 Difference]: With dead ends: 107 [2024-10-24 16:12:25,323 INFO L226 Difference]: Without dead ends: 107 [2024-10-24 16:12:25,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-24 16:12:25,323 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 14 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:25,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 394 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:25,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-24 16:12:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2024-10-24 16:12:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 77 states have (on average 1.4545454545454546) internal successors, (112), 94 states have internal predecessors, (112), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2024-10-24 16:12:25,326 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 34 [2024-10-24 16:12:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:25,326 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2024-10-24 16:12:25,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2024-10-24 16:12:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-24 16:12:25,327 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:25,327 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:25,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 16:12:25,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:25,532 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:25,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1047900764, now seen corresponding path program 1 times [2024-10-24 16:12:25,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:25,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079816570] [2024-10-24 16:12:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:25,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,667 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:25,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:25,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079816570] [2024-10-24 16:12:25,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079816570] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:25,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397042591] [2024-10-24 16:12:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:25,682 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:25,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 16:12:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:25,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 16:12:25,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:25,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:25,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-24 16:12:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:26,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397042591] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:26,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:26,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2024-10-24 16:12:26,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360174073] [2024-10-24 16:12:26,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:26,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-24 16:12:26,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:26,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-24 16:12:26,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-10-24 16:12:26,026 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 16:12:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:26,414 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2024-10-24 16:12:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 16:12:26,415 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2024-10-24 16:12:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:26,415 INFO L225 Difference]: With dead ends: 121 [2024-10-24 16:12:26,415 INFO L226 Difference]: Without dead ends: 121 [2024-10-24 16:12:26,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2024-10-24 16:12:26,416 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 178 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:26,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 701 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:12:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-24 16:12:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2024-10-24 16:12:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 94 states have internal predecessors, (111), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2024-10-24 16:12:26,418 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 35 [2024-10-24 16:12:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:26,418 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2024-10-24 16:12:26,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 16:12:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2024-10-24 16:12:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-24 16:12:26,419 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:26,419 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2024-10-24 16:12:26,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:26,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:26,623 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:26,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:26,624 INFO L85 PathProgramCache]: Analyzing trace with hash -452905813, now seen corresponding path program 1 times [2024-10-24 16:12:26,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:26,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795610983] [2024-10-24 16:12:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:26,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:26,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:26,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:26,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:26,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:26,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:26,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795610983] [2024-10-24 16:12:26,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795610983] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:26,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252584200] [2024-10-24 16:12:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:26,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:26,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:26,818 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:26,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 16:12:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:26,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 16:12:26,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:26,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:27,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-24 16:12:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:27,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252584200] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:27,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:27,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2024-10-24 16:12:27,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258735252] [2024-10-24 16:12:27,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:27,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 16:12:27,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 16:12:27,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-24 16:12:27,054 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:12:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:27,281 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2024-10-24 16:12:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 16:12:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2024-10-24 16:12:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:27,282 INFO L225 Difference]: With dead ends: 112 [2024-10-24 16:12:27,282 INFO L226 Difference]: Without dead ends: 112 [2024-10-24 16:12:27,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-10-24 16:12:27,283 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 259 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:27,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 251 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:12:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-24 16:12:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2024-10-24 16:12:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 80 states have (on average 1.4375) internal successors, (115), 96 states have internal predecessors, (115), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2024-10-24 16:12:27,285 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 35 [2024-10-24 16:12:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:27,285 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2024-10-24 16:12:27,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:12:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2024-10-24 16:12:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-24 16:12:27,286 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:27,286 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2024-10-24 16:12:27,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 16:12:27,486 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,SelfDestructingSolverStorable15 [2024-10-24 16:12:27,487 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:27,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:27,487 INFO L85 PathProgramCache]: Analyzing trace with hash -452905814, now seen corresponding path program 1 times [2024-10-24 16:12:27,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:27,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892966807] [2024-10-24 16:12:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:27,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:27,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:27,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892966807] [2024-10-24 16:12:27,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892966807] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:27,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:27,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:12:27,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693052736] [2024-10-24 16:12:27,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:27,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:12:27,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:12:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:27,542 INFO L87 Difference]: Start difference. First operand 106 states and 129 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:27,601 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2024-10-24 16:12:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:12:27,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2024-10-24 16:12:27,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:27,602 INFO L225 Difference]: With dead ends: 105 [2024-10-24 16:12:27,602 INFO L226 Difference]: Without dead ends: 105 [2024-10-24 16:12:27,603 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:12:27,603 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 51 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:27,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 139 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-24 16:12:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-10-24 16:12:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.4125) internal successors, (113), 95 states have internal predecessors, (113), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2024-10-24 16:12:27,606 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 35 [2024-10-24 16:12:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:27,606 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2024-10-24 16:12:27,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2024-10-24 16:12:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-24 16:12:27,606 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:27,607 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2024-10-24 16:12:27,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-24 16:12:27,607 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:27,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:27,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1924607544, now seen corresponding path program 2 times [2024-10-24 16:12:27,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:27,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377388363] [2024-10-24 16:12:27,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:27,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,666 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,667 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-24 16:12:27,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:27,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377388363] [2024-10-24 16:12:27,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377388363] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:27,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:27,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 16:12:27,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79600774] [2024-10-24 16:12:27,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:27,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 16:12:27,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:27,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 16:12:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:12:27,677 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:27,769 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2024-10-24 16:12:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:12:27,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2024-10-24 16:12:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:27,770 INFO L225 Difference]: With dead ends: 113 [2024-10-24 16:12:27,770 INFO L226 Difference]: Without dead ends: 113 [2024-10-24 16:12:27,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:12:27,771 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 15 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:27,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 287 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:27,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-24 16:12:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2024-10-24 16:12:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.4125) internal successors, (113), 95 states have internal predecessors, (113), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2024-10-24 16:12:27,773 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 37 [2024-10-24 16:12:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:27,774 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2024-10-24 16:12:27,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2024-10-24 16:12:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-24 16:12:27,774 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:27,774 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:27,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-24 16:12:27,775 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:27,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1450822460, now seen corresponding path program 1 times [2024-10-24 16:12:27,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:27,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135740528] [2024-10-24 16:12:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:27,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,825 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,839 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:27,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:27,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135740528] [2024-10-24 16:12:27,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135740528] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:27,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606233788] [2024-10-24 16:12:27,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:27,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:27,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:27,844 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:27,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 16:12:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:27,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 16:12:27,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:27,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:27,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606233788] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:27,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:27,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2024-10-24 16:12:27,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920185398] [2024-10-24 16:12:27,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:27,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 16:12:27,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:27,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 16:12:27,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:12:27,990 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:28,079 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2024-10-24 16:12:28,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:12:28,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2024-10-24 16:12:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:28,080 INFO L225 Difference]: With dead ends: 111 [2024-10-24 16:12:28,080 INFO L226 Difference]: Without dead ends: 111 [2024-10-24 16:12:28,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:12:28,080 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:28,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 261 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:28,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-24 16:12:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2024-10-24 16:12:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.4) internal successors, (112), 95 states have internal predecessors, (112), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2024-10-24 16:12:28,083 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 37 [2024-10-24 16:12:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:28,083 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2024-10-24 16:12:28,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2024-10-24 16:12:28,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-24 16:12:28,085 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:28,085 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:28,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 16:12:28,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:28,287 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:28,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1450724117, now seen corresponding path program 1 times [2024-10-24 16:12:28,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:28,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381582240] [2024-10-24 16:12:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:28,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:28,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:28,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:28,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:28,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:28,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381582240] [2024-10-24 16:12:28,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381582240] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:28,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89388373] [2024-10-24 16:12:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:28,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:28,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:28,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:28,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 16:12:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:28,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-24 16:12:28,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:28,696 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 [2024-10-24 16:12:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:28,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:28,773 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 37 treesize of output 33 [2024-10-24 16:12:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:28,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89388373] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:28,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:28,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2024-10-24 16:12:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316287375] [2024-10-24 16:12:28,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:28,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 16:12:28,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 16:12:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2024-10-24 16:12:28,839 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 16:12:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:29,129 INFO L93 Difference]: Finished difference Result 131 states and 155 transitions. [2024-10-24 16:12:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 16:12:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-10-24 16:12:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:29,130 INFO L225 Difference]: With dead ends: 131 [2024-10-24 16:12:29,130 INFO L226 Difference]: Without dead ends: 131 [2024-10-24 16:12:29,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2024-10-24 16:12:29,130 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 125 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:29,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 619 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:12:29,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-24 16:12:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 114. [2024-10-24 16:12:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 89 states have (on average 1.3707865168539326) internal successors, (122), 104 states have internal predecessors, (122), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2024-10-24 16:12:29,133 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 37 [2024-10-24 16:12:29,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:29,133 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2024-10-24 16:12:29,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 16:12:29,133 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2024-10-24 16:12:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-24 16:12:29,133 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:29,133 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2024-10-24 16:12:29,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 16:12:29,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:29,337 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:29,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2105697847, now seen corresponding path program 1 times [2024-10-24 16:12:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:29,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838630064] [2024-10-24 16:12:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:29,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:29,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:29,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:29,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:29,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:29,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838630064] [2024-10-24 16:12:29,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838630064] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:29,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087211653] [2024-10-24 16:12:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:29,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:29,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:29,405 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:29,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 16:12:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:29,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 16:12:29,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:29,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:29,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087211653] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:29,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:29,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-10-24 16:12:29,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981561327] [2024-10-24 16:12:29,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:29,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 16:12:29,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:29,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 16:12:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-10-24 16:12:29,579 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:29,780 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2024-10-24 16:12:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 16:12:29,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-10-24 16:12:29,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:29,780 INFO L225 Difference]: With dead ends: 113 [2024-10-24 16:12:29,781 INFO L226 Difference]: Without dead ends: 113 [2024-10-24 16:12:29,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-10-24 16:12:29,781 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 115 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:29,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 446 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-24 16:12:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2024-10-24 16:12:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 100 states have internal predecessors, (114), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2024-10-24 16:12:29,784 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 38 [2024-10-24 16:12:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:29,784 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2024-10-24 16:12:29,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2024-10-24 16:12:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-24 16:12:29,784 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:29,784 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2024-10-24 16:12:29,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-24 16:12:29,984 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,SelfDestructingSolverStorable20 [2024-10-24 16:12:29,985 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:29,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:29,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2105756593, now seen corresponding path program 1 times [2024-10-24 16:12:29,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:29,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104248849] [2024-10-24 16:12:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:29,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:30,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:30,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104248849] [2024-10-24 16:12:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104248849] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:30,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848000718] [2024-10-24 16:12:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:30,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:30,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:30,104 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:30,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 16:12:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 16:12:30,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:30,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:30,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848000718] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:30,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:30,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2024-10-24 16:12:30,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899454672] [2024-10-24 16:12:30,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:30,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 16:12:30,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 16:12:30,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-10-24 16:12:30,309 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:30,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:30,470 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2024-10-24 16:12:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 16:12:30,471 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-10-24 16:12:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:30,471 INFO L225 Difference]: With dead ends: 151 [2024-10-24 16:12:30,471 INFO L226 Difference]: Without dead ends: 151 [2024-10-24 16:12:30,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-10-24 16:12:30,472 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 54 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:30,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 492 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:30,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-10-24 16:12:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2024-10-24 16:12:30,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 106 states have (on average 1.320754716981132) internal successors, (140), 121 states have internal predecessors, (140), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2024-10-24 16:12:30,477 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 38 [2024-10-24 16:12:30,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:30,477 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2024-10-24 16:12:30,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2024-10-24 16:12:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-24 16:12:30,478 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:30,478 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:30,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:30,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-24 16:12:30,678 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:30,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:30,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2022768526, now seen corresponding path program 1 times [2024-10-24 16:12:30,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:30,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968791255] [2024-10-24 16:12:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:30,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:30,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:30,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968791255] [2024-10-24 16:12:30,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968791255] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:30,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:30,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:12:30,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515755681] [2024-10-24 16:12:30,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:30,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:12:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:12:30,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:30,723 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:30,778 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2024-10-24 16:12:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:12:30,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-10-24 16:12:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:30,779 INFO L225 Difference]: With dead ends: 130 [2024-10-24 16:12:30,779 INFO L226 Difference]: Without dead ends: 130 [2024-10-24 16:12:30,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:12:30,780 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:30,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 145 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:12:30,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-24 16:12:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-10-24 16:12:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 106 states have (on average 1.3113207547169812) internal successors, (139), 120 states have internal predecessors, (139), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 153 transitions. [2024-10-24 16:12:30,783 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 153 transitions. Word has length 38 [2024-10-24 16:12:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:30,783 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 153 transitions. [2024-10-24 16:12:30,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 153 transitions. [2024-10-24 16:12:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-24 16:12:30,784 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:30,784 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:30,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-24 16:12:30,784 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:30,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:30,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2022768525, now seen corresponding path program 1 times [2024-10-24 16:12:30,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:30,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484233785] [2024-10-24 16:12:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:30,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,874 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:30,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:30,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484233785] [2024-10-24 16:12:30,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484233785] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:30,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246953611] [2024-10-24 16:12:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:30,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:30,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:30,885 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:30,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 16:12:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:30,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 16:12:30,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:31,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:31,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-24 16:12:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:31,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246953611] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:31,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:31,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-10-24 16:12:31,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455878606] [2024-10-24 16:12:31,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:31,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 16:12:31,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 16:12:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-10-24 16:12:31,114 INFO L87 Difference]: Start difference. First operand 130 states and 153 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 16:12:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:31,236 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2024-10-24 16:12:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:12:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2024-10-24 16:12:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:31,237 INFO L225 Difference]: With dead ends: 134 [2024-10-24 16:12:31,237 INFO L226 Difference]: Without dead ends: 134 [2024-10-24 16:12:31,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-24 16:12:31,238 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 100 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:31,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 253 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:31,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-24 16:12:31,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2024-10-24 16:12:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 122 states have internal predecessors, (142), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2024-10-24 16:12:31,240 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 38 [2024-10-24 16:12:31,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:31,241 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2024-10-24 16:12:31,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 16:12:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2024-10-24 16:12:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-24 16:12:31,241 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:31,241 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:31,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-24 16:12:31,445 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,SelfDestructingSolverStorable23 [2024-10-24 16:12:31,445 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:31,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:31,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1739687050, now seen corresponding path program 1 times [2024-10-24 16:12:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:31,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611515572] [2024-10-24 16:12:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:31,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:31,524 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:31,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:31,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:31,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:31,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:31,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611515572] [2024-10-24 16:12:31,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611515572] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:31,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262826518] [2024-10-24 16:12:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:31,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:31,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:31,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:31,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 16:12:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:31,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 16:12:31,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:31,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:31,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262826518] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:31,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:31,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2024-10-24 16:12:31,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698058481] [2024-10-24 16:12:31,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:31,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 16:12:31,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:31,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 16:12:31,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-10-24 16:12:31,724 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:31,831 INFO L93 Difference]: Finished difference Result 135 states and 159 transitions. [2024-10-24 16:12:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:12:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2024-10-24 16:12:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:31,832 INFO L225 Difference]: With dead ends: 135 [2024-10-24 16:12:31,832 INFO L226 Difference]: Without dead ends: 135 [2024-10-24 16:12:31,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-10-24 16:12:31,833 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:31,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 348 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-24 16:12:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-10-24 16:12:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 112 states have (on average 1.2946428571428572) internal successors, (145), 125 states have internal predecessors, (145), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2024-10-24 16:12:31,835 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 40 [2024-10-24 16:12:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:31,835 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2024-10-24 16:12:31,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:31,836 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2024-10-24 16:12:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-24 16:12:31,836 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:31,836 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2024-10-24 16:12:31,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-24 16:12:32,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:32,037 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:32,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:32,037 INFO L85 PathProgramCache]: Analyzing trace with hash -205805065, now seen corresponding path program 2 times [2024-10-24 16:12:32,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:32,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671263641] [2024-10-24 16:12:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:32,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:32,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:32,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:32,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:32,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:32,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:32,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671263641] [2024-10-24 16:12:32,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671263641] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:32,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114967309] [2024-10-24 16:12:32,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:12:32,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:32,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:32,211 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:32,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 16:12:32,302 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:12:32,302 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:12:32,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-24 16:12:32,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:32,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:32,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-24 16:12:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:32,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114967309] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:32,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:32,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2024-10-24 16:12:32,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201851371] [2024-10-24 16:12:32,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:32,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-24 16:12:32,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:32,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-24 16:12:32,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2024-10-24 16:12:32,655 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 31 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 16:12:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:33,168 INFO L93 Difference]: Finished difference Result 175 states and 203 transitions. [2024-10-24 16:12:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 16:12:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2024-10-24 16:12:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:33,169 INFO L225 Difference]: With dead ends: 175 [2024-10-24 16:12:33,169 INFO L226 Difference]: Without dead ends: 175 [2024-10-24 16:12:33,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2024-10-24 16:12:33,170 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 122 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:33,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 871 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:12:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-10-24 16:12:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2024-10-24 16:12:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 115 states have (on average 1.2956521739130435) internal successors, (149), 128 states have internal predecessors, (149), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2024-10-24 16:12:33,173 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 41 [2024-10-24 16:12:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:33,173 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2024-10-24 16:12:33,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 16:12:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2024-10-24 16:12:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-24 16:12:33,174 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:33,174 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:33,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:33,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-24 16:12:33,378 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:33,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:33,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2084989713, now seen corresponding path program 1 times [2024-10-24 16:12:33,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:33,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607525436] [2024-10-24 16:12:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:33,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:33,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:33,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:33,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:33,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:33,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:33,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607525436] [2024-10-24 16:12:33,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607525436] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:33,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267295336] [2024-10-24 16:12:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:33,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:33,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:33,571 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:33,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 16:12:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:33,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 16:12:33,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:33,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:34,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267295336] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:34,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:34,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2024-10-24 16:12:34,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476472754] [2024-10-24 16:12:34,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:34,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-24 16:12:34,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:34,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-24 16:12:34,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2024-10-24 16:12:34,004 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand has 29 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 28 states have internal predecessors, (64), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-24 16:12:34,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:34,349 INFO L93 Difference]: Finished difference Result 203 states and 238 transitions. [2024-10-24 16:12:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 16:12:34,349 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 28 states have internal predecessors, (64), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) Word has length 42 [2024-10-24 16:12:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:34,350 INFO L225 Difference]: With dead ends: 203 [2024-10-24 16:12:34,350 INFO L226 Difference]: Without dead ends: 203 [2024-10-24 16:12:34,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2024-10-24 16:12:34,351 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 58 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:34,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 902 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:12:34,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-10-24 16:12:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2024-10-24 16:12:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 136 states have (on average 1.25) internal successors, (170), 149 states have internal predecessors, (170), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 184 transitions. [2024-10-24 16:12:34,355 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 184 transitions. Word has length 42 [2024-10-24 16:12:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:34,355 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 184 transitions. [2024-10-24 16:12:34,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 28 states have internal predecessors, (64), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-24 16:12:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 184 transitions. [2024-10-24 16:12:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-24 16:12:34,356 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:34,356 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:34,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:34,556 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,SelfDestructingSolverStorable26 [2024-10-24 16:12:34,557 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:34,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:34,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1096943843, now seen corresponding path program 1 times [2024-10-24 16:12:34,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:34,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096436408] [2024-10-24 16:12:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:34,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:12:34,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:34,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096436408] [2024-10-24 16:12:34,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096436408] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:34,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:34,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:12:34,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39844868] [2024-10-24 16:12:34,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:34,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:12:34,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:34,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:12:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:34,614 INFO L87 Difference]: Start difference. First operand 159 states and 184 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:34,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:34,669 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2024-10-24 16:12:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:12:34,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2024-10-24 16:12:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:34,670 INFO L225 Difference]: With dead ends: 158 [2024-10-24 16:12:34,670 INFO L226 Difference]: Without dead ends: 158 [2024-10-24 16:12:34,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:34,671 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:34,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 140 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:34,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-24 16:12:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-10-24 16:12:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 136 states have (on average 1.2426470588235294) internal successors, (169), 148 states have internal predecessors, (169), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2024-10-24 16:12:34,674 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 42 [2024-10-24 16:12:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:34,674 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2024-10-24 16:12:34,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2024-10-24 16:12:34,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-24 16:12:34,674 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:34,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:34,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-10-24 16:12:34,675 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:34,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1496840350, now seen corresponding path program 1 times [2024-10-24 16:12:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:34,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284766399] [2024-10-24 16:12:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:34,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 16:12:34,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:34,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284766399] [2024-10-24 16:12:34,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284766399] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:34,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429424933] [2024-10-24 16:12:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:34,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:34,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:34,769 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:34,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 16:12:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:34,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 16:12:34,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 16:12:34,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 16:12:35,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429424933] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:35,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:35,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-10-24 16:12:35,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615564305] [2024-10-24 16:12:35,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:35,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 16:12:35,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:35,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 16:12:35,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-10-24 16:12:35,030 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-24 16:12:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:35,307 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2024-10-24 16:12:35,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 16:12:35,308 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2024-10-24 16:12:35,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:35,308 INFO L225 Difference]: With dead ends: 217 [2024-10-24 16:12:35,308 INFO L226 Difference]: Without dead ends: 217 [2024-10-24 16:12:35,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2024-10-24 16:12:35,309 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 57 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:35,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 597 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:12:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-10-24 16:12:35,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 170. [2024-10-24 16:12:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 148 states have (on average 1.2364864864864864) internal successors, (183), 160 states have internal predecessors, (183), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 197 transitions. [2024-10-24 16:12:35,312 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 197 transitions. Word has length 43 [2024-10-24 16:12:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:35,312 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 197 transitions. [2024-10-24 16:12:35,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-24 16:12:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 197 transitions. [2024-10-24 16:12:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-24 16:12:35,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:35,316 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1] [2024-10-24 16:12:35,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-24 16:12:35,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-24 16:12:35,517 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:35,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:35,517 INFO L85 PathProgramCache]: Analyzing trace with hash 153199367, now seen corresponding path program 1 times [2024-10-24 16:12:35,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:35,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218093635] [2024-10-24 16:12:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:35,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:35,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:35,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:35,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:35,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:12:35,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:35,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218093635] [2024-10-24 16:12:35,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218093635] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:35,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756148999] [2024-10-24 16:12:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:35,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:35,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:35,608 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:35,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 16:12:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:35,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 16:12:35,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:12:35,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:12:35,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756148999] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:35,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:35,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2024-10-24 16:12:35,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019761742] [2024-10-24 16:12:35,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:35,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 16:12:35,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 16:12:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-24 16:12:35,792 INFO L87 Difference]: Start difference. First operand 170 states and 197 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:35,880 INFO L93 Difference]: Finished difference Result 177 states and 202 transitions. [2024-10-24 16:12:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:12:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2024-10-24 16:12:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:35,881 INFO L225 Difference]: With dead ends: 177 [2024-10-24 16:12:35,881 INFO L226 Difference]: Without dead ends: 177 [2024-10-24 16:12:35,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-10-24 16:12:35,882 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 32 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:35,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 308 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-24 16:12:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2024-10-24 16:12:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 139 states have (on average 1.223021582733813) internal successors, (170), 151 states have internal predecessors, (170), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 184 transitions. [2024-10-24 16:12:35,884 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 184 transitions. Word has length 43 [2024-10-24 16:12:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:35,884 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 184 transitions. [2024-10-24 16:12:35,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:35,885 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 184 transitions. [2024-10-24 16:12:35,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-24 16:12:35,885 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:35,885 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:35,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:36,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:36,086 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:36,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:36,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1351927799, now seen corresponding path program 1 times [2024-10-24 16:12:36,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:36,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787145780] [2024-10-24 16:12:36,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:36,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,117 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,122 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:12:36,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:36,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787145780] [2024-10-24 16:12:36,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787145780] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:36,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:36,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:12:36,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477952622] [2024-10-24 16:12:36,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:36,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:12:36,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:36,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:12:36,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:36,125 INFO L87 Difference]: Start difference. First operand 161 states and 184 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 16:12:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:36,168 INFO L93 Difference]: Finished difference Result 160 states and 183 transitions. [2024-10-24 16:12:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:12:36,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-10-24 16:12:36,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:36,169 INFO L225 Difference]: With dead ends: 160 [2024-10-24 16:12:36,169 INFO L226 Difference]: Without dead ends: 160 [2024-10-24 16:12:36,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:12:36,169 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 31 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:36,169 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 138 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:12:36,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-24 16:12:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-10-24 16:12:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 139 states have (on average 1.2158273381294964) internal successors, (169), 150 states have internal predecessors, (169), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 183 transitions. [2024-10-24 16:12:36,172 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 183 transitions. Word has length 45 [2024-10-24 16:12:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:36,173 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 183 transitions. [2024-10-24 16:12:36,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 16:12:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 183 transitions. [2024-10-24 16:12:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-24 16:12:36,173 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:36,173 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:36,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-10-24 16:12:36,173 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:36,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1281383019, now seen corresponding path program 1 times [2024-10-24 16:12:36,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:36,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135880750] [2024-10-24 16:12:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:36,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,267 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-24 16:12:36,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:36,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135880750] [2024-10-24 16:12:36,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135880750] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:36,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:36,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 16:12:36,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205465013] [2024-10-24 16:12:36,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:36,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:12:36,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:36,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:12:36,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:12:36,272 INFO L87 Difference]: Start difference. First operand 160 states and 183 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:36,370 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2024-10-24 16:12:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:12:36,370 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2024-10-24 16:12:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:36,371 INFO L225 Difference]: With dead ends: 166 [2024-10-24 16:12:36,371 INFO L226 Difference]: Without dead ends: 166 [2024-10-24 16:12:36,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-10-24 16:12:36,371 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 78 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:36,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 166 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-10-24 16:12:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2024-10-24 16:12:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 144 states have (on average 1.2222222222222223) internal successors, (176), 155 states have internal predecessors, (176), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 190 transitions. [2024-10-24 16:12:36,374 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 190 transitions. Word has length 45 [2024-10-24 16:12:36,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:36,374 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 190 transitions. [2024-10-24 16:12:36,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 190 transitions. [2024-10-24 16:12:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-24 16:12:36,374 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:36,374 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:36,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-10-24 16:12:36,374 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:36,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:36,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1039911399, now seen corresponding path program 1 times [2024-10-24 16:12:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:36,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050230856] [2024-10-24 16:12:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:36,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,457 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:12:36,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050230856] [2024-10-24 16:12:36,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050230856] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:36,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:36,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 16:12:36,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313756810] [2024-10-24 16:12:36,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:36,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 16:12:36,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:36,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 16:12:36,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:12:36,462 INFO L87 Difference]: Start difference. First operand 165 states and 190 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:36,542 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2024-10-24 16:12:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:12:36,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2024-10-24 16:12:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:36,543 INFO L225 Difference]: With dead ends: 164 [2024-10-24 16:12:36,543 INFO L226 Difference]: Without dead ends: 164 [2024-10-24 16:12:36,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:12:36,543 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 30 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:36,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 153 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-10-24 16:12:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2024-10-24 16:12:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 154 states have internal predecessors, (175), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2024-10-24 16:12:36,546 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 46 [2024-10-24 16:12:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:36,546 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2024-10-24 16:12:36,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2024-10-24 16:12:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-24 16:12:36,547 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:36,547 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 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] [2024-10-24 16:12:36,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-10-24 16:12:36,547 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:36,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:36,547 INFO L85 PathProgramCache]: Analyzing trace with hash -847271386, now seen corresponding path program 2 times [2024-10-24 16:12:36,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:36,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067527623] [2024-10-24 16:12:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:36,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,757 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 16:12:36,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067527623] [2024-10-24 16:12:36,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067527623] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:36,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417777953] [2024-10-24 16:12:36,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:12:36,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:36,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:36,761 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:36,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 16:12:36,862 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:12:36,862 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:12:36,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-24 16:12:36,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 16:12:37,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:37,208 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 9 treesize of output 7 [2024-10-24 16:12:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 16:12:37,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417777953] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:37,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:37,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2024-10-24 16:12:37,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983742618] [2024-10-24 16:12:37,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:37,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-24 16:12:37,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:37,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-24 16:12:37,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2024-10-24 16:12:37,262 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 30 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 16:12:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:37,798 INFO L93 Difference]: Finished difference Result 203 states and 234 transitions. [2024-10-24 16:12:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 16:12:37,799 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-10-24 16:12:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:37,800 INFO L225 Difference]: With dead ends: 203 [2024-10-24 16:12:37,800 INFO L226 Difference]: Without dead ends: 203 [2024-10-24 16:12:37,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2024-10-24 16:12:37,801 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 120 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:37,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 655 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:12:37,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-10-24 16:12:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2024-10-24 16:12:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 145 states have (on average 1.2137931034482758) internal successors, (176), 155 states have internal predecessors, (176), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 190 transitions. [2024-10-24 16:12:37,803 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 190 transitions. Word has length 46 [2024-10-24 16:12:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:37,803 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 190 transitions. [2024-10-24 16:12:37,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 16:12:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 190 transitions. [2024-10-24 16:12:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-24 16:12:37,804 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:37,804 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:37,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-24 16:12:38,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:38,004 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:38,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:38,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1068171013, now seen corresponding path program 1 times [2024-10-24 16:12:38,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:38,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650784533] [2024-10-24 16:12:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:38,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-24 16:12:38,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:38,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650784533] [2024-10-24 16:12:38,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650784533] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:38,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:38,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 16:12:38,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335464389] [2024-10-24 16:12:38,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:38,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:12:38,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:38,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:12:38,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:12:38,100 INFO L87 Difference]: Start difference. First operand 165 states and 190 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:38,190 INFO L93 Difference]: Finished difference Result 163 states and 187 transitions. [2024-10-24 16:12:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:12:38,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2024-10-24 16:12:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:38,191 INFO L225 Difference]: With dead ends: 163 [2024-10-24 16:12:38,191 INFO L226 Difference]: Without dead ends: 163 [2024-10-24 16:12:38,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-10-24 16:12:38,191 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 51 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:38,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 162 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-10-24 16:12:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2024-10-24 16:12:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 145 states have (on average 1.193103448275862) internal successors, (173), 153 states have internal predecessors, (173), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 187 transitions. [2024-10-24 16:12:38,194 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 187 transitions. Word has length 46 [2024-10-24 16:12:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:38,194 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 187 transitions. [2024-10-24 16:12:38,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 187 transitions. [2024-10-24 16:12:38,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-24 16:12:38,194 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:38,194 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:38,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-10-24 16:12:38,194 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:38,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:38,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2122484788, now seen corresponding path program 1 times [2024-10-24 16:12:38,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:38,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491205129] [2024-10-24 16:12:38,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:38,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:12:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-24 16:12:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 16:12:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:12:38,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:38,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491205129] [2024-10-24 16:12:38,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491205129] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:38,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:12:38,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 16:12:38,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828804611] [2024-10-24 16:12:38,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:38,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 16:12:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 16:12:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:12:38,358 INFO L87 Difference]: Start difference. First operand 163 states and 187 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:38,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:38,470 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2024-10-24 16:12:38,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:12:38,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2024-10-24 16:12:38,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:38,471 INFO L225 Difference]: With dead ends: 162 [2024-10-24 16:12:38,471 INFO L226 Difference]: Without dead ends: 140 [2024-10-24 16:12:38,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:12:38,471 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:38,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 184 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:38,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-24 16:12:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-10-24 16:12:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 123 states have (on average 1.2032520325203253) internal successors, (148), 130 states have internal predecessors, (148), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2024-10-24 16:12:38,474 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 47 [2024-10-24 16:12:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:38,475 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2024-10-24 16:12:38,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:12:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2024-10-24 16:12:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-24 16:12:38,475 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:38,475 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:38,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-10-24 16:12:38,476 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:38,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash -18020766, now seen corresponding path program 1 times [2024-10-24 16:12:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:38,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907957209] [2024-10-24 16:12:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:38,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,580 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:12:38,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907957209] [2024-10-24 16:12:38,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907957209] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493746583] [2024-10-24 16:12:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:38,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:38,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:38,591 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:38,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-24 16:12:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:38,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 16:12:38,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-24 16:12:38,735 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:12:38,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493746583] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:12:38,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:12:38,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 12 [2024-10-24 16:12:38,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314526845] [2024-10-24 16:12:38,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:12:38,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:12:38,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:38,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:12:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-10-24 16:12:38,736 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:38,778 INFO L93 Difference]: Finished difference Result 143 states and 163 transitions. [2024-10-24 16:12:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:12:38,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2024-10-24 16:12:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:38,778 INFO L225 Difference]: With dead ends: 143 [2024-10-24 16:12:38,779 INFO L226 Difference]: Without dead ends: 143 [2024-10-24 16:12:38,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-10-24 16:12:38,779 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:38,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 163 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:12:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-24 16:12:38,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2024-10-24 16:12:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 131 states have internal predecessors, (149), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2024-10-24 16:12:38,781 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 48 [2024-10-24 16:12:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:38,781 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2024-10-24 16:12:38,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2024-10-24 16:12:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-24 16:12:38,782 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:38,782 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 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, 1] [2024-10-24 16:12:38,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:38,982 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,SelfDestructingSolverStorable36 [2024-10-24 16:12:38,982 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:38,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:38,983 INFO L85 PathProgramCache]: Analyzing trace with hash 544593415, now seen corresponding path program 2 times [2024-10-24 16:12:38,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:38,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724330214] [2024-10-24 16:12:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:38,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:39,044 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:39,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:39,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:39,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-24 16:12:39,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:39,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724330214] [2024-10-24 16:12:39,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724330214] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:39,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186453063] [2024-10-24 16:12:39,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:12:39,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:39,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:39,054 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:39,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-24 16:12:39,164 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:12:39,164 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:12:39,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 16:12:39,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 16:12:39,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 16:12:39,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186453063] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:39,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:39,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2024-10-24 16:12:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818924372] [2024-10-24 16:12:39,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:39,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 16:12:39,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 16:12:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-10-24 16:12:39,346 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:39,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:39,632 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2024-10-24 16:12:39,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 16:12:39,632 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-10-24 16:12:39,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:39,633 INFO L225 Difference]: With dead ends: 164 [2024-10-24 16:12:39,633 INFO L226 Difference]: Without dead ends: 164 [2024-10-24 16:12:39,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2024-10-24 16:12:39,635 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 103 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:39,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 506 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:12:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-10-24 16:12:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2024-10-24 16:12:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 131 states have internal predecessors, (148), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 162 transitions. [2024-10-24 16:12:39,637 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 162 transitions. Word has length 49 [2024-10-24 16:12:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:39,638 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 162 transitions. [2024-10-24 16:12:39,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:39,638 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 162 transitions. [2024-10-24 16:12:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-24 16:12:39,638 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:39,638 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:39,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:39,841 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,SelfDestructingSolverStorable37 [2024-10-24 16:12:39,841 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:39,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash 461080559, now seen corresponding path program 1 times [2024-10-24 16:12:39,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:39,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562980174] [2024-10-24 16:12:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:39,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:39,993 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:39,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:40,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:40,004 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:12:40,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:40,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562980174] [2024-10-24 16:12:40,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562980174] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:40,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772769443] [2024-10-24 16:12:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:40,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:40,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:40,008 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:40,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-24 16:12:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:40,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 16:12:40,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 16:12:40,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 16:12:40,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772769443] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:40,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:40,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2024-10-24 16:12:40,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289139994] [2024-10-24 16:12:40,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:40,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 16:12:40,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:40,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 16:12:40,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-10-24 16:12:40,323 INFO L87 Difference]: Start difference. First operand 141 states and 162 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:40,548 INFO L93 Difference]: Finished difference Result 192 states and 219 transitions. [2024-10-24 16:12:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 16:12:40,548 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-10-24 16:12:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:40,549 INFO L225 Difference]: With dead ends: 192 [2024-10-24 16:12:40,549 INFO L226 Difference]: Without dead ends: 192 [2024-10-24 16:12:40,549 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2024-10-24 16:12:40,549 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 60 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:40,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 352 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:12:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-10-24 16:12:40,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 167. [2024-10-24 16:12:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 150 states have (on average 1.2066666666666668) internal successors, (181), 157 states have internal predecessors, (181), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2024-10-24 16:12:40,552 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 49 [2024-10-24 16:12:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:40,552 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2024-10-24 16:12:40,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2024-10-24 16:12:40,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-24 16:12:40,553 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:40,553 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:40,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:40,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-24 16:12:40,754 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:40,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:40,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2048590622, now seen corresponding path program 1 times [2024-10-24 16:12:40,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:40,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401452978] [2024-10-24 16:12:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:40,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:40,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:40,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:40,874 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:40,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:12:40,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:40,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401452978] [2024-10-24 16:12:40,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401452978] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:40,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990331455] [2024-10-24 16:12:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:40,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:40,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:40,878 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:40,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-24 16:12:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:41,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 16:12:41,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 16:12:41,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 16:12:41,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990331455] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:41,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:41,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2024-10-24 16:12:41,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777692991] [2024-10-24 16:12:41,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:41,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 16:12:41,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:41,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 16:12:41,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-10-24 16:12:41,146 INFO L87 Difference]: Start difference. First operand 167 states and 195 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:41,289 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2024-10-24 16:12:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 16:12:41,290 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2024-10-24 16:12:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:41,290 INFO L225 Difference]: With dead ends: 170 [2024-10-24 16:12:41,290 INFO L226 Difference]: Without dead ends: 170 [2024-10-24 16:12:41,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-10-24 16:12:41,291 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 75 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:41,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 194 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-24 16:12:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2024-10-24 16:12:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 151 states have (on average 1.205298013245033) internal successors, (182), 158 states have internal predecessors, (182), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2024-10-24 16:12:41,293 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 51 [2024-10-24 16:12:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:41,293 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2024-10-24 16:12:41,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2024-10-24 16:12:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-24 16:12:41,294 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:41,294 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:41,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:41,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:41,498 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:41,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:41,499 INFO L85 PathProgramCache]: Analyzing trace with hash 705957108, now seen corresponding path program 1 times [2024-10-24 16:12:41,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:41,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122229420] [2024-10-24 16:12:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:41,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:41,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:41,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:41,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:41,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 16:12:41,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:41,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122229420] [2024-10-24 16:12:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122229420] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:41,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016917696] [2024-10-24 16:12:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:41,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:41,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:41,588 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:41,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-24 16:12:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:41,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 16:12:41,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 16:12:41,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 16:12:41,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016917696] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:12:41,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:12:41,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-10-24 16:12:41,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041955981] [2024-10-24 16:12:41,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:41,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 16:12:41,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:41,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 16:12:41,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-24 16:12:41,840 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:12:41,990 INFO L93 Difference]: Finished difference Result 182 states and 212 transitions. [2024-10-24 16:12:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 16:12:41,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2024-10-24 16:12:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:12:41,991 INFO L225 Difference]: With dead ends: 182 [2024-10-24 16:12:41,991 INFO L226 Difference]: Without dead ends: 182 [2024-10-24 16:12:41,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-10-24 16:12:41,991 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 32 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:12:41,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 432 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:12:41,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-24 16:12:41,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2024-10-24 16:12:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 164 states have (on average 1.201219512195122) internal successors, (197), 171 states have internal predecessors, (197), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 16:12:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 211 transitions. [2024-10-24 16:12:41,994 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 211 transitions. Word has length 51 [2024-10-24 16:12:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:12:41,994 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 211 transitions. [2024-10-24 16:12:41,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:12:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 211 transitions. [2024-10-24 16:12:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-24 16:12:41,995 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:12:41,995 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:12:42,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-24 16:12:42,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:42,196 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-24 16:12:42,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:12:42,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1720134806, now seen corresponding path program 3 times [2024-10-24 16:12:42,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:12:42,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251595614] [2024-10-24 16:12:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:12:42,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:12:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:42,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:12:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:42,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 16:12:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:42,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:12:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:42,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 16:12:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:12:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-24 16:12:42,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:12:42,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251595614] [2024-10-24 16:12:42,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251595614] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:42,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571774389] [2024-10-24 16:12:42,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:12:42,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:12:42,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:12:42,358 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:12:42,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-24 16:12:42,526 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 16:12:42,526 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:12:42,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-24 16:12:42,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:12:42,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-24 16:12:42,569 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 [2024-10-24 16:12:42,637 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 16:12:42,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-10-24 16:12:42,650 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:12:42,650 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 11 treesize of output 11 [2024-10-24 16:12:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-24 16:12:55,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:12:56,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571774389] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:12:56,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:12:56,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 26 [2024-10-24 16:12:56,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666936633] [2024-10-24 16:12:56,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:12:56,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-24 16:12:56,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:12:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-24 16:12:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1134, Unknown=3, NotChecked=0, Total=1260 [2024-10-24 16:12:56,524 INFO L87 Difference]: Start difference. First operand 181 states and 211 transitions. Second operand has 27 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-24 16:13:00,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 16:13:04,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 16:13:12,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 16:13:17,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 16:13:21,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 16:13:41,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]