./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 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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-84cfde4 [2024-10-11 17:53:06,851 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 17:53:06,898 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 17:53:06,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 17:53:06,903 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 17:53:06,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 17:53:06,930 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 17:53:06,931 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 17:53:06,931 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 17:53:06,931 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 17:53:06,932 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 17:53:06,932 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 17:53:06,932 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 17:53:06,932 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 17:53:06,933 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 17:53:06,933 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 17:53:06,933 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 17:53:06,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 17:53:06,934 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 17:53:06,934 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 17:53:06,939 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 17:53:06,940 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 17:53:06,940 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 17:53:06,940 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 17:53:06,941 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 17:53:06,941 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 17:53:06,941 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 17:53:06,941 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 17:53:06,941 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 17:53:06,942 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 17:53:06,942 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 17:53:06,943 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 17:53:06,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 17:53:06,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:53:06,943 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 17:53:06,944 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 17:53:06,944 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 17:53:06,944 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 17:53:06,944 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 17:53:06,944 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 17:53:06,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 17:53:06,945 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 17:53:06,945 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2024-10-11 17:53:07,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 17:53:07,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 17:53:07,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 17:53:07,158 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 17:53:07,159 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 17:53:07,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-10-11 17:53:08,381 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 17:53:08,520 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 17:53:08,521 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-10-11 17:53:08,526 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/27e88ba40/cded939de70841918395f52376d59c46/FLAGedde6d744 [2024-10-11 17:53:08,537 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/27e88ba40/cded939de70841918395f52376d59c46 [2024-10-11 17:53:08,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 17:53:08,540 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 17:53:08,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 17:53:08,542 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 17:53:08,545 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 17:53:08,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a5ff9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08, skipping insertion in model container [2024-10-11 17:53:08,547 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,562 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 17:53:08,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:53:08,745 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 17:53:08,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:53:08,780 INFO L204 MainTranslator]: Completed translation [2024-10-11 17:53:08,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08 WrapperNode [2024-10-11 17:53:08,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 17:53:08,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 17:53:08,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 17:53:08,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 17:53:08,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,794 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,813 INFO L138 Inliner]: procedures = 22, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2024-10-11 17:53:08,813 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 17:53:08,814 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 17:53:08,814 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 17:53:08,814 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 17:53:08,826 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,830 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,841 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]. [2024-10-11 17:53:08,841 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,841 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,846 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,851 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,852 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,853 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,855 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 17:53:08,856 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 17:53:08,856 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 17:53:08,856 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 17:53:08,857 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (1/1) ... [2024-10-11 17:53:08,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:53:08,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:08,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 17:53:08,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 17:53:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 17:53:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 17:53:08,929 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 17:53:08,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 17:53:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 17:53:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 17:53:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 17:53:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 17:53:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 17:53:08,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 17:53:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 17:53:08,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 17:53:08,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-10-11 17:53:08,931 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-10-11 17:53:08,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 17:53:09,021 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 17:53:09,023 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 17:53:09,317 INFO L? ?]: Removed 113 outVars from TransFormulas that were not future-live. [2024-10-11 17:53:09,317 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 17:53:09,356 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 17:53:09,356 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-11 17:53:09,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:53:09 BoogieIcfgContainer [2024-10-11 17:53:09,357 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 17:53:09,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 17:53:09,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 17:53:09,361 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 17:53:09,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 05:53:08" (1/3) ... [2024-10-11 17:53:09,362 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5875e77f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:53:09, skipping insertion in model container [2024-10-11 17:53:09,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:08" (2/3) ... [2024-10-11 17:53:09,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5875e77f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:53:09, skipping insertion in model container [2024-10-11 17:53:09,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:53:09" (3/3) ... [2024-10-11 17:53:09,364 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2024-10-11 17:53:09,376 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 17:53:09,377 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-10-11 17:53:09,411 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 17:53:09,417 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;@528269af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 17:53:09,417 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-10-11 17:53:09,420 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) [2024-10-11 17:53:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 17:53:09,426 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:09,426 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] [2024-10-11 17:53:09,426 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)] === [2024-10-11 17:53:09,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:09,430 INFO L85 PathProgramCache]: Analyzing trace with hash 659165774, now seen corresponding path program 1 times [2024-10-11 17:53:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:09,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953759693] [2024-10-11 17:53:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:09,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:09,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:09,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:09,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:09,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:09,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953759693] [2024-10-11 17:53:09,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953759693] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:09,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:09,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:53:09,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600562160] [2024-10-11 17:53:09,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:09,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:53:09,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:09,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:53:09,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:53:09,634 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) [2024-10-11 17:53:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:09,705 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2024-10-11 17:53:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:53:09,708 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 [2024-10-11 17:53:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:09,715 INFO L225 Difference]: With dead ends: 87 [2024-10-11 17:53:09,716 INFO L226 Difference]: Without dead ends: 86 [2024-10-11 17:53:09,717 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 [2024-10-11 17:53:09,721 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, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:09,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 143 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:53:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-11 17:53:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-10-11 17:53:09,760 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) [2024-10-11 17:53:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2024-10-11 17:53:09,762 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 25 [2024-10-11 17:53:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:09,762 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2024-10-11 17:53:09,763 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) [2024-10-11 17:53:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2024-10-11 17:53:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 17:53:09,776 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:09,776 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] [2024-10-11 17:53:09,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 17:53:09,777 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)] === [2024-10-11 17:53:09,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash -133096758, now seen corresponding path program 1 times [2024-10-11 17:53:09,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:09,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53700063] [2024-10-11 17:53:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:09,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:10,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:10,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:10,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:10,028 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:10,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:10,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53700063] [2024-10-11 17:53:10,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53700063] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:10,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:10,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:53:10,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418553897] [2024-10-11 17:53:10,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:10,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:53:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:53:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:53:10,037 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) [2024-10-11 17:53:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:10,184 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2024-10-11 17:53:10,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:53:10,185 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 [2024-10-11 17:53:10,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:10,186 INFO L225 Difference]: With dead ends: 84 [2024-10-11 17:53:10,186 INFO L226 Difference]: Without dead ends: 84 [2024-10-11 17:53:10,186 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 [2024-10-11 17:53:10,187 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 [2024-10-11 17:53:10,187 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] [2024-10-11 17:53:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-11 17:53:10,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-10-11 17:53:10,196 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) [2024-10-11 17:53:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2024-10-11 17:53:10,199 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 25 [2024-10-11 17:53:10,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:10,201 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2024-10-11 17:53:10,201 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) [2024-10-11 17:53:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2024-10-11 17:53:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 17:53:10,203 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:10,203 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] [2024-10-11 17:53:10,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 17:53:10,203 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)] === [2024-10-11 17:53:10,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash -133096757, now seen corresponding path program 1 times [2024-10-11 17:53:10,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:10,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168425011] [2024-10-11 17:53:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:10,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:10,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:10,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:10,581 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:10,589 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 17:53:10,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:10,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168425011] [2024-10-11 17:53:10,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168425011] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:10,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:10,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-11 17:53:10,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953023003] [2024-10-11 17:53:10,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:10,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 17:53:10,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 17:53:10,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-11 17:53:10,599 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) [2024-10-11 17:53:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:10,971 INFO L93 Difference]: Finished difference Result 138 states and 157 transitions. [2024-10-11 17:53:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 17:53:10,971 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 [2024-10-11 17:53:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:10,972 INFO L225 Difference]: With dead ends: 138 [2024-10-11 17:53:10,972 INFO L226 Difference]: Without dead ends: 138 [2024-10-11 17:53:10,972 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 [2024-10-11 17:53:10,973 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 106 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-10-11 17:53:10,973 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] [2024-10-11 17:53:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-11 17:53:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2024-10-11 17:53:10,984 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) [2024-10-11 17:53:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2024-10-11 17:53:10,985 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 25 [2024-10-11 17:53:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:10,985 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2024-10-11 17:53:10,985 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) [2024-10-11 17:53:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2024-10-11 17:53:10,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 17:53:10,986 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:10,986 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] [2024-10-11 17:53:10,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 17:53:10,986 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)] === [2024-10-11 17:53:10,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:10,987 INFO L85 PathProgramCache]: Analyzing trace with hash 168967805, now seen corresponding path program 1 times [2024-10-11 17:53:10,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:10,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642206807] [2024-10-11 17:53:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:10,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:11,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:11,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642206807] [2024-10-11 17:53:11,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642206807] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:11,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:11,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:53:11,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754798836] [2024-10-11 17:53:11,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:11,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:53:11,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:11,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:53:11,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:53:11,099 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) [2024-10-11 17:53:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:11,192 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2024-10-11 17:53:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:53:11,192 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 [2024-10-11 17:53:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:11,193 INFO L225 Difference]: With dead ends: 93 [2024-10-11 17:53:11,193 INFO L226 Difference]: Without dead ends: 93 [2024-10-11 17:53:11,193 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 [2024-10-11 17:53:11,194 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 [2024-10-11 17:53:11,194 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] [2024-10-11 17:53:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-11 17:53:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-10-11 17:53:11,201 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) [2024-10-11 17:53:11,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2024-10-11 17:53:11,201 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 26 [2024-10-11 17:53:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:11,202 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2024-10-11 17:53:11,202 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) [2024-10-11 17:53:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2024-10-11 17:53:11,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 17:53:11,202 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:11,202 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] [2024-10-11 17:53:11,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 17:53:11,203 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)] === [2024-10-11 17:53:11,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:11,203 INFO L85 PathProgramCache]: Analyzing trace with hash 168967806, now seen corresponding path program 1 times [2024-10-11 17:53:11,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:11,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657745330] [2024-10-11 17:53:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:11,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,426 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:11,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657745330] [2024-10-11 17:53:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657745330] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:11,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:11,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 17:53:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133007292] [2024-10-11 17:53:11,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:11,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 17:53:11,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 17:53:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-11 17:53:11,441 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) [2024-10-11 17:53:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:11,670 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2024-10-11 17:53:11,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:53:11,671 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 [2024-10-11 17:53:11,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:11,672 INFO L225 Difference]: With dead ends: 96 [2024-10-11 17:53:11,672 INFO L226 Difference]: Without dead ends: 96 [2024-10-11 17:53:11,672 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 [2024-10-11 17:53:11,673 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 [2024-10-11 17:53:11,676 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] [2024-10-11 17:53:11,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-11 17:53:11,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-10-11 17:53:11,682 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) [2024-10-11 17:53:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2024-10-11 17:53:11,683 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 26 [2024-10-11 17:53:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:11,683 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2024-10-11 17:53:11,683 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) [2024-10-11 17:53:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2024-10-11 17:53:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 17:53:11,685 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:11,685 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] [2024-10-11 17:53:11,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 17:53:11,686 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)] === [2024-10-11 17:53:11,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:11,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1865611460, now seen corresponding path program 1 times [2024-10-11 17:53:11,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:11,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66101466] [2024-10-11 17:53:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:11,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,971 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:11,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:12,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:12,006 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 17:53:12,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:12,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66101466] [2024-10-11 17:53:12,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66101466] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:12,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882289953] [2024-10-11 17:53:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:12,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:12,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:12,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 17:53:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:12,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 17:53:12,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:12,194 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 [2024-10-11 17:53:12,208 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 [2024-10-11 17:53:12,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:53:12,336 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 [2024-10-11 17:53:12,348 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 17:53:12,348 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 [2024-10-11 17:53:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 17:53:12,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:12,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882289953] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:12,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:53:12,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2024-10-11 17:53:12,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488820509] [2024-10-11 17:53:12,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:12,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 17:53:12,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:12,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 17:53:12,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-10-11 17:53:12,714 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) [2024-10-11 17:53:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:13,785 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2024-10-11 17:53:13,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 17:53:13,786 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 [2024-10-11 17:53:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:13,787 INFO L225 Difference]: With dead ends: 139 [2024-10-11 17:53:13,788 INFO L226 Difference]: Without dead ends: 139 [2024-10-11 17:53:13,788 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 [2024-10-11 17:53:13,789 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 [2024-10-11 17:53:13,791 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] [2024-10-11 17:53:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-11 17:53:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 97. [2024-10-11 17:53:13,802 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) [2024-10-11 17:53:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2024-10-11 17:53:13,803 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 26 [2024-10-11 17:53:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:13,803 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2024-10-11 17:53:13,803 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) [2024-10-11 17:53:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2024-10-11 17:53:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-11 17:53:13,805 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:13,805 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] [2024-10-11 17:53:13,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 17:53:14,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:14,011 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)] === [2024-10-11 17:53:14,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash -832196833, now seen corresponding path program 1 times [2024-10-11 17:53:14,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:14,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420780578] [2024-10-11 17:53:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:14,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:14,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:14,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420780578] [2024-10-11 17:53:14,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420780578] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:14,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:14,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:53:14,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657735579] [2024-10-11 17:53:14,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:14,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:53:14,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:14,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:53:14,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:53:14,102 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) [2024-10-11 17:53:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:14,206 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2024-10-11 17:53:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:53:14,206 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 [2024-10-11 17:53:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:14,207 INFO L225 Difference]: With dead ends: 91 [2024-10-11 17:53:14,207 INFO L226 Difference]: Without dead ends: 91 [2024-10-11 17:53:14,207 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 [2024-10-11 17:53:14,208 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 [2024-10-11 17:53:14,208 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] [2024-10-11 17:53:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-11 17:53:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-10-11 17:53:14,211 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) [2024-10-11 17:53:14,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2024-10-11 17:53:14,211 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 28 [2024-10-11 17:53:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:14,212 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2024-10-11 17:53:14,212 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) [2024-10-11 17:53:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2024-10-11 17:53:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-11 17:53:14,212 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:14,212 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] [2024-10-11 17:53:14,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 17:53:14,213 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)] === [2024-10-11 17:53:14,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash -832196832, now seen corresponding path program 1 times [2024-10-11 17:53:14,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:14,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052252246] [2024-10-11 17:53:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:14,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,343 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 17:53:14,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:14,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052252246] [2024-10-11 17:53:14,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052252246] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:14,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:14,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-11 17:53:14,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520443017] [2024-10-11 17:53:14,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:14,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 17:53:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 17:53:14,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-11 17:53:14,375 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) [2024-10-11 17:53:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:14,536 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2024-10-11 17:53:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 17:53:14,536 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 [2024-10-11 17:53:14,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:14,537 INFO L225 Difference]: With dead ends: 125 [2024-10-11 17:53:14,537 INFO L226 Difference]: Without dead ends: 125 [2024-10-11 17:53:14,537 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 [2024-10-11 17:53:14,538 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 [2024-10-11 17:53:14,538 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] [2024-10-11 17:53:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-11 17:53:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2024-10-11 17:53:14,542 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) [2024-10-11 17:53:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2024-10-11 17:53:14,542 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 28 [2024-10-11 17:53:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:14,542 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2024-10-11 17:53:14,542 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) [2024-10-11 17:53:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2024-10-11 17:53:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 17:53:14,543 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:14,543 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] [2024-10-11 17:53:14,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 17:53:14,543 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)] === [2024-10-11 17:53:14,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 23156164, now seen corresponding path program 1 times [2024-10-11 17:53:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:14,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211761897] [2024-10-11 17:53:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,773 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:14,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:14,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211761897] [2024-10-11 17:53:14,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211761897] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985163855] [2024-10-11 17:53:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:14,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:14,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:14,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:14,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 17:53:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:14,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 17:53:14,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:14,852 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 [2024-10-11 17:53:14,950 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-11 17:53:14,950 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 [2024-10-11 17:53:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:15,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:15,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985163855] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:15,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:53:15,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-10-11 17:53:15,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16472030] [2024-10-11 17:53:15,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:15,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 17:53:15,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:15,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 17:53:15,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-11 17:53:15,457 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) [2024-10-11 17:53:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:15,850 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2024-10-11 17:53:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:53:15,850 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 [2024-10-11 17:53:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:15,851 INFO L225 Difference]: With dead ends: 90 [2024-10-11 17:53:15,851 INFO L226 Difference]: Without dead ends: 90 [2024-10-11 17:53:15,851 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 [2024-10-11 17:53:15,851 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, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:15,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 317 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:53:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-11 17:53:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2024-10-11 17:53:15,854 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) [2024-10-11 17:53:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2024-10-11 17:53:15,855 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 29 [2024-10-11 17:53:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:15,855 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2024-10-11 17:53:15,855 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) [2024-10-11 17:53:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2024-10-11 17:53:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 17:53:15,856 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:15,856 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] [2024-10-11 17:53:15,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:16,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:16,057 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)] === [2024-10-11 17:53:16,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash 776735974, now seen corresponding path program 1 times [2024-10-11 17:53:16,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:16,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561202489] [2024-10-11 17:53:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:16,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,252 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:16,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:16,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561202489] [2024-10-11 17:53:16,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561202489] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:16,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614347620] [2024-10-11 17:53:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:16,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:16,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:16,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:16,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 17:53:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 17:53:16,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:16,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:16,548 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 [2024-10-11 17:53:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:16,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614347620] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:16,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:16,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-10-11 17:53:16,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543999516] [2024-10-11 17:53:16,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:16,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 17:53:16,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 17:53:16,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2024-10-11 17:53:16,611 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) [2024-10-11 17:53:16,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:16,925 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2024-10-11 17:53:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 17:53:16,926 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 [2024-10-11 17:53:16,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:16,926 INFO L225 Difference]: With dead ends: 88 [2024-10-11 17:53:16,926 INFO L226 Difference]: Without dead ends: 88 [2024-10-11 17:53:16,926 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 [2024-10-11 17:53:16,927 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 [2024-10-11 17:53:16,927 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] [2024-10-11 17:53:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-11 17:53:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2024-10-11 17:53:16,929 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) [2024-10-11 17:53:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2024-10-11 17:53:16,930 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 31 [2024-10-11 17:53:16,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:16,930 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2024-10-11 17:53:16,930 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) [2024-10-11 17:53:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2024-10-11 17:53:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 17:53:16,930 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:16,930 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] [2024-10-11 17:53:16,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 17:53:17,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:17,133 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)] === [2024-10-11 17:53:17,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash 776733223, now seen corresponding path program 1 times [2024-10-11 17:53:17,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:17,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108171172] [2024-10-11 17:53:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:17,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,172 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:17,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:17,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108171172] [2024-10-11 17:53:17,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108171172] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:17,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:17,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:53:17,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203758034] [2024-10-11 17:53:17,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:17,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:53:17,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:53:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:53:17,176 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) [2024-10-11 17:53:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:17,250 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2024-10-11 17:53:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:53:17,250 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 [2024-10-11 17:53:17,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:17,251 INFO L225 Difference]: With dead ends: 84 [2024-10-11 17:53:17,251 INFO L226 Difference]: Without dead ends: 84 [2024-10-11 17:53:17,251 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 [2024-10-11 17:53:17,251 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-10-11 17:53:17,251 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] [2024-10-11 17:53:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-11 17:53:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2024-10-11 17:53:17,254 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) [2024-10-11 17:53:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2024-10-11 17:53:17,256 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 31 [2024-10-11 17:53:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:17,256 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2024-10-11 17:53:17,256 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) [2024-10-11 17:53:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2024-10-11 17:53:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 17:53:17,259 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:17,259 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] [2024-10-11 17:53:17,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 17:53:17,260 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)] === [2024-10-11 17:53:17,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash 776733224, now seen corresponding path program 1 times [2024-10-11 17:53:17,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:17,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105755806] [2024-10-11 17:53:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:17,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:17,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:17,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105755806] [2024-10-11 17:53:17,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105755806] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:17,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460129609] [2024-10-11 17:53:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:17,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:17,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:17,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:17,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 17:53:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 17:53:17,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:17,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:17,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460129609] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:17,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:17,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-10-11 17:53:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70075627] [2024-10-11 17:53:17,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:17,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 17:53:17,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 17:53:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-11 17:53:17,443 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) [2024-10-11 17:53:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:17,532 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2024-10-11 17:53:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:53:17,532 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 [2024-10-11 17:53:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:17,533 INFO L225 Difference]: With dead ends: 106 [2024-10-11 17:53:17,533 INFO L226 Difference]: Without dead ends: 106 [2024-10-11 17:53:17,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-10-11 17:53:17,533 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 [2024-10-11 17:53:17,533 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] [2024-10-11 17:53:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-11 17:53:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2024-10-11 17:53:17,535 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) [2024-10-11 17:53:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2024-10-11 17:53:17,536 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 31 [2024-10-11 17:53:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:17,536 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2024-10-11 17:53:17,536 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) [2024-10-11 17:53:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2024-10-11 17:53:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-11 17:53:17,536 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:17,536 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] [2024-10-11 17:53:17,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 17:53:17,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 17:53:17,741 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)] === [2024-10-11 17:53:17,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:17,741 INFO L85 PathProgramCache]: Analyzing trace with hash 658933410, now seen corresponding path program 2 times [2024-10-11 17:53:17,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:17,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826880490] [2024-10-11 17:53:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:17,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:17,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:17,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826880490] [2024-10-11 17:53:17,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826880490] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:17,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11155938] [2024-10-11 17:53:17,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:53:17,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:17,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:17,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:17,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 17:53:17,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:53:17,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:53:17,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 17:53:17,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:18,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:18,109 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 [2024-10-11 17:53:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:18,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11155938] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:18,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:18,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2024-10-11 17:53:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633792551] [2024-10-11 17:53:18,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:18,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 17:53:18,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 17:53:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-10-11 17:53:18,158 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) [2024-10-11 17:53:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:18,585 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2024-10-11 17:53:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 17:53:18,586 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 [2024-10-11 17:53:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:18,587 INFO L225 Difference]: With dead ends: 138 [2024-10-11 17:53:18,587 INFO L226 Difference]: Without dead ends: 138 [2024-10-11 17:53:18,588 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 [2024-10-11 17:53:18,589 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 280 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-10-11 17:53:18,589 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] [2024-10-11 17:53:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-11 17:53:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2024-10-11 17:53:18,592 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) [2024-10-11 17:53:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2024-10-11 17:53:18,593 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 34 [2024-10-11 17:53:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:18,593 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2024-10-11 17:53:18,593 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) [2024-10-11 17:53:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2024-10-11 17:53:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-11 17:53:18,594 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:18,594 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] [2024-10-11 17:53:18,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:18,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 17:53:18,798 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)] === [2024-10-11 17:53:18,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:18,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1538629502, now seen corresponding path program 1 times [2024-10-11 17:53:18,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:18,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924147888] [2024-10-11 17:53:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:18,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:18,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:18,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924147888] [2024-10-11 17:53:18,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924147888] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:18,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027660723] [2024-10-11 17:53:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:18,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:18,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:18,922 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:18,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 17:53:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 17:53:18,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:19,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:19,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027660723] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:19,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:19,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2024-10-11 17:53:19,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086437340] [2024-10-11 17:53:19,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:19,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 17:53:19,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:19,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 17:53:19,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-11 17:53:19,056 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) [2024-10-11 17:53:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:19,171 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2024-10-11 17:53:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:53:19,172 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 [2024-10-11 17:53:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:19,172 INFO L225 Difference]: With dead ends: 107 [2024-10-11 17:53:19,172 INFO L226 Difference]: Without dead ends: 107 [2024-10-11 17:53:19,172 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 [2024-10-11 17:53:19,173 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 [2024-10-11 17:53:19,173 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] [2024-10-11 17:53:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-11 17:53:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2024-10-11 17:53:19,175 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) [2024-10-11 17:53:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2024-10-11 17:53:19,176 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 34 [2024-10-11 17:53:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:19,177 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2024-10-11 17:53:19,177 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) [2024-10-11 17:53:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2024-10-11 17:53:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 17:53:19,178 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:19,178 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] [2024-10-11 17:53:19,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 17:53:19,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 17:53:19,379 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)] === [2024-10-11 17:53:19,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:19,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1047900764, now seen corresponding path program 1 times [2024-10-11 17:53:19,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:19,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812806258] [2024-10-11 17:53:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:19,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:19,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812806258] [2024-10-11 17:53:19,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812806258] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:19,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496403783] [2024-10-11 17:53:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:19,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:19,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:19,551 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:19,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 17:53:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 17:53:19,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:19,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:19,801 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 [2024-10-11 17:53:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:19,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496403783] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:19,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:19,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2024-10-11 17:53:19,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775498277] [2024-10-11 17:53:19,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:19,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 17:53:19,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:19,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 17:53:19,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-10-11 17:53:19,878 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) [2024-10-11 17:53:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:20,304 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2024-10-11 17:53:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 17:53:20,304 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 [2024-10-11 17:53:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:20,305 INFO L225 Difference]: With dead ends: 121 [2024-10-11 17:53:20,305 INFO L226 Difference]: Without dead ends: 121 [2024-10-11 17:53:20,305 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 [2024-10-11 17:53:20,305 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 178 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-10-11 17:53:20,306 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] [2024-10-11 17:53:20,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-11 17:53:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2024-10-11 17:53:20,308 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) [2024-10-11 17:53:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2024-10-11 17:53:20,308 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 35 [2024-10-11 17:53:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:20,309 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2024-10-11 17:53:20,309 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) [2024-10-11 17:53:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2024-10-11 17:53:20,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 17:53:20,309 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:20,309 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] [2024-10-11 17:53:20,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:20,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:20,514 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)] === [2024-10-11 17:53:20,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash -452905813, now seen corresponding path program 1 times [2024-10-11 17:53:20,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:20,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276706064] [2024-10-11 17:53:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:20,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:20,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:20,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276706064] [2024-10-11 17:53:20,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276706064] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:20,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557503808] [2024-10-11 17:53:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:20,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:20,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:20,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:20,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 17:53:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 17:53:20,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:20,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:20,915 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 [2024-10-11 17:53:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:20,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557503808] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:20,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:20,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2024-10-11 17:53:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672766389] [2024-10-11 17:53:20,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:20,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 17:53:20,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 17:53:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-11 17:53:20,951 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) [2024-10-11 17:53:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:21,201 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2024-10-11 17:53:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 17:53:21,201 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 [2024-10-11 17:53:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:21,202 INFO L225 Difference]: With dead ends: 112 [2024-10-11 17:53:21,202 INFO L226 Difference]: Without dead ends: 112 [2024-10-11 17:53:21,203 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 [2024-10-11 17:53:21,204 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 [2024-10-11 17:53:21,204 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] [2024-10-11 17:53:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-11 17:53:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2024-10-11 17:53:21,206 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) [2024-10-11 17:53:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2024-10-11 17:53:21,206 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 35 [2024-10-11 17:53:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:21,207 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2024-10-11 17:53:21,207 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) [2024-10-11 17:53:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2024-10-11 17:53:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 17:53:21,207 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:21,207 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] [2024-10-11 17:53:21,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 17:53:21,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 17:53:21,408 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)] === [2024-10-11 17:53:21,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash -452905814, now seen corresponding path program 1 times [2024-10-11 17:53:21,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:21,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469173546] [2024-10-11 17:53:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:21,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,457 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:21,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:21,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469173546] [2024-10-11 17:53:21,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469173546] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:21,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:21,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:53:21,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949808068] [2024-10-11 17:53:21,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:21,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:53:21,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:21,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:53:21,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:53:21,461 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) [2024-10-11 17:53:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:21,522 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2024-10-11 17:53:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:53:21,523 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 [2024-10-11 17:53:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:21,523 INFO L225 Difference]: With dead ends: 105 [2024-10-11 17:53:21,524 INFO L226 Difference]: Without dead ends: 105 [2024-10-11 17:53:21,524 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 [2024-10-11 17:53:21,524 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 [2024-10-11 17:53:21,524 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] [2024-10-11 17:53:21,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-11 17:53:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-10-11 17:53:21,528 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) [2024-10-11 17:53:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2024-10-11 17:53:21,529 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 35 [2024-10-11 17:53:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:21,529 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2024-10-11 17:53:21,529 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) [2024-10-11 17:53:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2024-10-11 17:53:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 17:53:21,530 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:21,530 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] [2024-10-11 17:53:21,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-11 17:53:21,530 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)] === [2024-10-11 17:53:21,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:21,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1924607544, now seen corresponding path program 2 times [2024-10-11 17:53:21,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:21,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963431585] [2024-10-11 17:53:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:21,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-11 17:53:21,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:21,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963431585] [2024-10-11 17:53:21,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963431585] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:21,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:21,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 17:53:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735466307] [2024-10-11 17:53:21,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:21,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:53:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:53:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:53:21,618 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) [2024-10-11 17:53:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:21,710 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2024-10-11 17:53:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:53:21,710 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 [2024-10-11 17:53:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:21,711 INFO L225 Difference]: With dead ends: 113 [2024-10-11 17:53:21,711 INFO L226 Difference]: Without dead ends: 113 [2024-10-11 17:53:21,711 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 [2024-10-11 17:53:21,711 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 [2024-10-11 17:53:21,711 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] [2024-10-11 17:53:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-11 17:53:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2024-10-11 17:53:21,713 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) [2024-10-11 17:53:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2024-10-11 17:53:21,714 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 37 [2024-10-11 17:53:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:21,714 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2024-10-11 17:53:21,714 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) [2024-10-11 17:53:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2024-10-11 17:53:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 17:53:21,715 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:21,715 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] [2024-10-11 17:53:21,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-11 17:53:21,715 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)] === [2024-10-11 17:53:21,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:21,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1450822460, now seen corresponding path program 1 times [2024-10-11 17:53:21,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:21,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763257991] [2024-10-11 17:53:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:21,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:21,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:21,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763257991] [2024-10-11 17:53:21,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763257991] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:21,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566632197] [2024-10-11 17:53:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:21,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:21,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:21,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:21,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 17:53:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:21,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 17:53:21,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:21,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:21,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566632197] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:21,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:21,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2024-10-11 17:53:21,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803897435] [2024-10-11 17:53:21,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:21,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 17:53:21,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:21,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 17:53:21,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-11 17:53:21,936 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) [2024-10-11 17:53:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:22,022 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2024-10-11 17:53:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:53:22,022 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 [2024-10-11 17:53:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:22,023 INFO L225 Difference]: With dead ends: 111 [2024-10-11 17:53:22,023 INFO L226 Difference]: Without dead ends: 111 [2024-10-11 17:53:22,023 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 [2024-10-11 17:53:22,023 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 [2024-10-11 17:53:22,023 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] [2024-10-11 17:53:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-11 17:53:22,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2024-10-11 17:53:22,027 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) [2024-10-11 17:53:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2024-10-11 17:53:22,027 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 37 [2024-10-11 17:53:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:22,027 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2024-10-11 17:53:22,027 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) [2024-10-11 17:53:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2024-10-11 17:53:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 17:53:22,028 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:22,028 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] [2024-10-11 17:53:22,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:22,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:22,233 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)] === [2024-10-11 17:53:22,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1450724117, now seen corresponding path program 1 times [2024-10-11 17:53:22,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:22,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706803326] [2024-10-11 17:53:22,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:22,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:22,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:22,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:22,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:22,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:22,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706803326] [2024-10-11 17:53:22,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706803326] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:22,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472400506] [2024-10-11 17:53:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:22,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:22,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:22,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:22,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 17:53:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:22,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 17:53:22,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:22,726 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 [2024-10-11 17:53:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:22,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:22,808 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 [2024-10-11 17:53:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:22,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472400506] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:22,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:22,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2024-10-11 17:53:22,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407786228] [2024-10-11 17:53:22,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:22,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 17:53:22,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 17:53:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2024-10-11 17:53:22,882 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) [2024-10-11 17:53:23,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:23,160 INFO L93 Difference]: Finished difference Result 131 states and 155 transitions. [2024-10-11 17:53:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 17:53:23,161 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 [2024-10-11 17:53:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:23,161 INFO L225 Difference]: With dead ends: 131 [2024-10-11 17:53:23,161 INFO L226 Difference]: Without dead ends: 131 [2024-10-11 17:53:23,162 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 [2024-10-11 17:53:23,162 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 [2024-10-11 17:53:23,163 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] [2024-10-11 17:53:23,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-11 17:53:23,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 114. [2024-10-11 17:53:23,165 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) [2024-10-11 17:53:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2024-10-11 17:53:23,166 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 37 [2024-10-11 17:53:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:23,166 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2024-10-11 17:53:23,166 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) [2024-10-11 17:53:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2024-10-11 17:53:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 17:53:23,167 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:23,167 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] [2024-10-11 17:53:23,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:23,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:23,371 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)] === [2024-10-11 17:53:23,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2105697847, now seen corresponding path program 1 times [2024-10-11 17:53:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:23,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19144624] [2024-10-11 17:53:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,457 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:23,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19144624] [2024-10-11 17:53:23,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19144624] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6674053] [2024-10-11 17:53:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:23,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:23,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:23,462 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:23,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 17:53:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 17:53:23,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:23,593 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:23,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6674053] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:23,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:23,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-10-11 17:53:23,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098139365] [2024-10-11 17:53:23,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:23,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 17:53:23,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 17:53:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-10-11 17:53:23,660 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) [2024-10-11 17:53:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:23,855 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2024-10-11 17:53:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 17:53:23,856 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 [2024-10-11 17:53:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:23,856 INFO L225 Difference]: With dead ends: 113 [2024-10-11 17:53:23,856 INFO L226 Difference]: Without dead ends: 113 [2024-10-11 17:53:23,857 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 [2024-10-11 17:53:23,857 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 [2024-10-11 17:53:23,857 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] [2024-10-11 17:53:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-11 17:53:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2024-10-11 17:53:23,860 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) [2024-10-11 17:53:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2024-10-11 17:53:23,860 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 38 [2024-10-11 17:53:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:23,860 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2024-10-11 17:53:23,860 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) [2024-10-11 17:53:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2024-10-11 17:53:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 17:53:23,861 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:23,861 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] [2024-10-11 17:53:23,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:24,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 17:53:24,066 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)] === [2024-10-11 17:53:24,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2105756593, now seen corresponding path program 1 times [2024-10-11 17:53:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:24,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042133884] [2024-10-11 17:53:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,181 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:24,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:24,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042133884] [2024-10-11 17:53:24,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042133884] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:24,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613618166] [2024-10-11 17:53:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:24,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:24,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:24,193 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:24,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 17:53:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 17:53:24,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:24,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:24,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613618166] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:24,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:24,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2024-10-11 17:53:24,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502422803] [2024-10-11 17:53:24,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:24,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 17:53:24,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 17:53:24,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-10-11 17:53:24,413 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) [2024-10-11 17:53:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:24,625 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2024-10-11 17:53:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 17:53:24,625 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 [2024-10-11 17:53:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:24,626 INFO L225 Difference]: With dead ends: 151 [2024-10-11 17:53:24,626 INFO L226 Difference]: Without dead ends: 151 [2024-10-11 17:53:24,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-10-11 17:53:24,627 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, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:24,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 492 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:53:24,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-10-11 17:53:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2024-10-11 17:53:24,631 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) [2024-10-11 17:53:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2024-10-11 17:53:24,631 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 38 [2024-10-11 17:53:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:24,631 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2024-10-11 17:53:24,631 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) [2024-10-11 17:53:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2024-10-11 17:53:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 17:53:24,632 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:24,632 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] [2024-10-11 17:53:24,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 17:53:24,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:24,838 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)] === [2024-10-11 17:53:24,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:24,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2022768526, now seen corresponding path program 1 times [2024-10-11 17:53:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:24,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179386092] [2024-10-11 17:53:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:24,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:24,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:24,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179386092] [2024-10-11 17:53:24,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179386092] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:24,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:24,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:53:24,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64340612] [2024-10-11 17:53:24,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:24,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:53:24,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:24,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:53:24,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:53:24,885 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) [2024-10-11 17:53:24,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:24,958 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2024-10-11 17:53:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:53:24,959 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 [2024-10-11 17:53:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:24,959 INFO L225 Difference]: With dead ends: 130 [2024-10-11 17:53:24,959 INFO L226 Difference]: Without dead ends: 130 [2024-10-11 17:53:24,959 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 [2024-10-11 17:53:24,960 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:24,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 145 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:53:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-11 17:53:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-10-11 17:53:24,963 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) [2024-10-11 17:53:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 153 transitions. [2024-10-11 17:53:24,963 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 153 transitions. Word has length 38 [2024-10-11 17:53:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:24,964 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 153 transitions. [2024-10-11 17:53:24,964 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) [2024-10-11 17:53:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 153 transitions. [2024-10-11 17:53:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 17:53:24,964 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:24,964 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] [2024-10-11 17:53:24,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-11 17:53:24,965 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)] === [2024-10-11 17:53:24,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:24,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2022768525, now seen corresponding path program 1 times [2024-10-11 17:53:24,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:24,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237600180] [2024-10-11 17:53:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:24,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,058 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:25,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:25,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237600180] [2024-10-11 17:53:25,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237600180] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:25,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204887664] [2024-10-11 17:53:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:25,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:25,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:25,063 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:25,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 17:53:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 17:53:25,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:25,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:25,263 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 [2024-10-11 17:53:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:25,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204887664] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:25,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:25,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-10-11 17:53:25,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648303110] [2024-10-11 17:53:25,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:25,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 17:53:25,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 17:53:25,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-10-11 17:53:25,288 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) [2024-10-11 17:53:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:25,415 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2024-10-11 17:53:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 17:53:25,416 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 [2024-10-11 17:53:25,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:25,416 INFO L225 Difference]: With dead ends: 134 [2024-10-11 17:53:25,416 INFO L226 Difference]: Without dead ends: 134 [2024-10-11 17:53:25,417 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 [2024-10-11 17:53:25,418 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 [2024-10-11 17:53:25,418 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] [2024-10-11 17:53:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-11 17:53:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2024-10-11 17:53:25,420 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) [2024-10-11 17:53:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2024-10-11 17:53:25,420 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 38 [2024-10-11 17:53:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:25,420 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2024-10-11 17:53:25,421 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) [2024-10-11 17:53:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2024-10-11 17:53:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 17:53:25,421 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:25,421 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] [2024-10-11 17:53:25,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:25,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:25,626 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)] === [2024-10-11 17:53:25,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1739687050, now seen corresponding path program 1 times [2024-10-11 17:53:25,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:25,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130861103] [2024-10-11 17:53:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:25,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:25,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:25,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130861103] [2024-10-11 17:53:25,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130861103] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:25,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54927888] [2024-10-11 17:53:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:25,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:25,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:25,718 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:25,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 17:53:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 17:53:25,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:25,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:25,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54927888] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:25,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:25,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2024-10-11 17:53:25,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237385248] [2024-10-11 17:53:25,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:25,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 17:53:25,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 17:53:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-10-11 17:53:25,907 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) [2024-10-11 17:53:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:26,037 INFO L93 Difference]: Finished difference Result 135 states and 159 transitions. [2024-10-11 17:53:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:53:26,037 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 [2024-10-11 17:53:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:26,038 INFO L225 Difference]: With dead ends: 135 [2024-10-11 17:53:26,038 INFO L226 Difference]: Without dead ends: 135 [2024-10-11 17:53:26,038 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 [2024-10-11 17:53:26,039 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 [2024-10-11 17:53:26,039 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] [2024-10-11 17:53:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-11 17:53:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-10-11 17:53:26,041 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) [2024-10-11 17:53:26,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2024-10-11 17:53:26,041 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 40 [2024-10-11 17:53:26,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:26,042 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2024-10-11 17:53:26,042 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) [2024-10-11 17:53:26,042 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2024-10-11 17:53:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-11 17:53:26,042 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:26,042 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] [2024-10-11 17:53:26,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:26,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 17:53:26,243 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)] === [2024-10-11 17:53:26,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash -205805065, now seen corresponding path program 2 times [2024-10-11 17:53:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:26,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604677743] [2024-10-11 17:53:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:26,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:26,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:26,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:26,414 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:26,417 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:26,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:26,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604677743] [2024-10-11 17:53:26,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604677743] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:26,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832954017] [2024-10-11 17:53:26,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:53:26,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:26,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:26,421 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:26,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 17:53:26,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:53:26,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:53:26,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 17:53:26,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:26,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:26,754 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 [2024-10-11 17:53:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:26,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832954017] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:26,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:26,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2024-10-11 17:53:26,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069832361] [2024-10-11 17:53:26,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:26,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 17:53:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 17:53:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2024-10-11 17:53:26,864 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) [2024-10-11 17:53:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:27,456 INFO L93 Difference]: Finished difference Result 175 states and 203 transitions. [2024-10-11 17:53:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 17:53:27,457 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 [2024-10-11 17:53:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:27,457 INFO L225 Difference]: With dead ends: 175 [2024-10-11 17:53:27,457 INFO L226 Difference]: Without dead ends: 175 [2024-10-11 17:53:27,458 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 [2024-10-11 17:53:27,458 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 122 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:27,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 871 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:53:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-10-11 17:53:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2024-10-11 17:53:27,460 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) [2024-10-11 17:53:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2024-10-11 17:53:27,461 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 41 [2024-10-11 17:53:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:27,461 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2024-10-11 17:53:27,461 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) [2024-10-11 17:53:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2024-10-11 17:53:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-11 17:53:27,462 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:27,462 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] [2024-10-11 17:53:27,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:27,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-11 17:53:27,665 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)] === [2024-10-11 17:53:27,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2084989713, now seen corresponding path program 1 times [2024-10-11 17:53:27,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:27,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888759056] [2024-10-11 17:53:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:27,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:27,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:27,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888759056] [2024-10-11 17:53:27,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888759056] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:27,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621652590] [2024-10-11 17:53:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:27,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:27,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:27,860 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:27,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 17:53:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 17:53:27,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:28,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:28,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621652590] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:28,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:28,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2024-10-11 17:53:28,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546122417] [2024-10-11 17:53:28,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:28,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 17:53:28,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:28,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 17:53:28,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2024-10-11 17:53:28,300 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) [2024-10-11 17:53:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:28,706 INFO L93 Difference]: Finished difference Result 203 states and 238 transitions. [2024-10-11 17:53:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 17:53:28,707 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 [2024-10-11 17:53:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:28,707 INFO L225 Difference]: With dead ends: 203 [2024-10-11 17:53:28,707 INFO L226 Difference]: Without dead ends: 203 [2024-10-11 17:53:28,708 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 [2024-10-11 17:53:28,708 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, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:28,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 902 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:53:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-10-11 17:53:28,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2024-10-11 17:53:28,712 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) [2024-10-11 17:53:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 184 transitions. [2024-10-11 17:53:28,713 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 184 transitions. Word has length 42 [2024-10-11 17:53:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:28,713 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 184 transitions. [2024-10-11 17:53:28,713 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) [2024-10-11 17:53:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 184 transitions. [2024-10-11 17:53:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-11 17:53:28,713 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:28,714 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] [2024-10-11 17:53:28,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-11 17:53:28,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-11 17:53:28,914 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)] === [2024-10-11 17:53:28,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1096943843, now seen corresponding path program 1 times [2024-10-11 17:53:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:28,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143959227] [2024-10-11 17:53:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:28,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:28,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:28,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:28,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:28,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:53:28,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:28,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143959227] [2024-10-11 17:53:28,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143959227] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:28,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:28,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:53:28,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107839108] [2024-10-11 17:53:28,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:28,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:53:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:53:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:53:28,971 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) [2024-10-11 17:53:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:29,031 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2024-10-11 17:53:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:53:29,032 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 [2024-10-11 17:53:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:29,033 INFO L225 Difference]: With dead ends: 158 [2024-10-11 17:53:29,033 INFO L226 Difference]: Without dead ends: 158 [2024-10-11 17:53:29,033 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 [2024-10-11 17:53:29,033 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 [2024-10-11 17:53:29,033 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] [2024-10-11 17:53:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-11 17:53:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-10-11 17:53:29,036 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) [2024-10-11 17:53:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2024-10-11 17:53:29,036 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 42 [2024-10-11 17:53:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:29,037 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2024-10-11 17:53:29,037 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) [2024-10-11 17:53:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2024-10-11 17:53:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-11 17:53:29,037 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:29,037 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] [2024-10-11 17:53:29,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-10-11 17:53:29,038 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)] === [2024-10-11 17:53:29,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:29,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1496840350, now seen corresponding path program 1 times [2024-10-11 17:53:29,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:29,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425331707] [2024-10-11 17:53:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:29,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,140 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:53:29,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:29,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425331707] [2024-10-11 17:53:29,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425331707] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:29,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846349050] [2024-10-11 17:53:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:29,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:29,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:29,144 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:29,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 17:53:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 17:53:29,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:53:29,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:53:29,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846349050] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:29,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:29,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-10-11 17:53:29,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192534530] [2024-10-11 17:53:29,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:29,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 17:53:29,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:29,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 17:53:29,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-10-11 17:53:29,421 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) [2024-10-11 17:53:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:29,714 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2024-10-11 17:53:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 17:53:29,715 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 [2024-10-11 17:53:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:29,715 INFO L225 Difference]: With dead ends: 217 [2024-10-11 17:53:29,715 INFO L226 Difference]: Without dead ends: 217 [2024-10-11 17:53:29,716 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 [2024-10-11 17:53:29,716 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 [2024-10-11 17:53:29,716 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] [2024-10-11 17:53:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-10-11 17:53:29,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 170. [2024-10-11 17:53:29,719 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) [2024-10-11 17:53:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 197 transitions. [2024-10-11 17:53:29,719 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 197 transitions. Word has length 43 [2024-10-11 17:53:29,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:29,720 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 197 transitions. [2024-10-11 17:53:29,720 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) [2024-10-11 17:53:29,720 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 197 transitions. [2024-10-11 17:53:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-11 17:53:29,720 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:29,720 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] [2024-10-11 17:53:29,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:29,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-11 17:53:29,924 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)] === [2024-10-11 17:53:29,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash 153199367, now seen corresponding path program 1 times [2024-10-11 17:53:29,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:29,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787149226] [2024-10-11 17:53:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:29,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,010 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:53:30,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:30,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787149226] [2024-10-11 17:53:30,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787149226] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:30,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959685192] [2024-10-11 17:53:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:30,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:30,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:30,020 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:30,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 17:53:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 17:53:30,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:53:30,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:53:30,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959685192] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:30,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:30,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2024-10-11 17:53:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655634110] [2024-10-11 17:53:30,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:30,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 17:53:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 17:53:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-11 17:53:30,214 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) [2024-10-11 17:53:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:30,308 INFO L93 Difference]: Finished difference Result 177 states and 202 transitions. [2024-10-11 17:53:30,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:53:30,311 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 [2024-10-11 17:53:30,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:30,314 INFO L225 Difference]: With dead ends: 177 [2024-10-11 17:53:30,314 INFO L226 Difference]: Without dead ends: 177 [2024-10-11 17:53:30,314 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 [2024-10-11 17:53:30,315 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 [2024-10-11 17:53:30,315 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] [2024-10-11 17:53:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-11 17:53:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2024-10-11 17:53:30,319 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) [2024-10-11 17:53:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 184 transitions. [2024-10-11 17:53:30,319 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 184 transitions. Word has length 43 [2024-10-11 17:53:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:30,320 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 184 transitions. [2024-10-11 17:53:30,320 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) [2024-10-11 17:53:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 184 transitions. [2024-10-11 17:53:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 17:53:30,321 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:30,321 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] [2024-10-11 17:53:30,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-11 17:53:30,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:30,522 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)] === [2024-10-11 17:53:30,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:30,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1351927799, now seen corresponding path program 1 times [2024-10-11 17:53:30,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:30,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112515578] [2024-10-11 17:53:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:30,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:53:30,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:30,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112515578] [2024-10-11 17:53:30,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112515578] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:30,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:30,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:53:30,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500991707] [2024-10-11 17:53:30,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:30,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:53:30,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:53:30,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:53:30,563 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) [2024-10-11 17:53:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:30,617 INFO L93 Difference]: Finished difference Result 160 states and 183 transitions. [2024-10-11 17:53:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:53:30,617 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 [2024-10-11 17:53:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:30,618 INFO L225 Difference]: With dead ends: 160 [2024-10-11 17:53:30,618 INFO L226 Difference]: Without dead ends: 160 [2024-10-11 17:53:30,618 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 [2024-10-11 17:53:30,619 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:30,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 138 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:53:30,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-11 17:53:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-10-11 17:53:30,621 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) [2024-10-11 17:53:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 183 transitions. [2024-10-11 17:53:30,623 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 183 transitions. Word has length 45 [2024-10-11 17:53:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:30,624 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 183 transitions. [2024-10-11 17:53:30,624 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) [2024-10-11 17:53:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 183 transitions. [2024-10-11 17:53:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 17:53:30,625 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:30,625 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] [2024-10-11 17:53:30,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-10-11 17:53:30,625 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)] === [2024-10-11 17:53:30,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:30,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1281383019, now seen corresponding path program 1 times [2024-10-11 17:53:30,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:30,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096459754] [2024-10-11 17:53:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:30,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,723 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 17:53:30,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:30,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096459754] [2024-10-11 17:53:30,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096459754] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:30,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:30,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 17:53:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918044625] [2024-10-11 17:53:30,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:30,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 17:53:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 17:53:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-11 17:53:30,728 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) [2024-10-11 17:53:30,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:30,834 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2024-10-11 17:53:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:53:30,835 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 [2024-10-11 17:53:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:30,835 INFO L225 Difference]: With dead ends: 166 [2024-10-11 17:53:30,835 INFO L226 Difference]: Without dead ends: 166 [2024-10-11 17:53:30,836 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 [2024-10-11 17:53:30,836 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 [2024-10-11 17:53:30,837 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] [2024-10-11 17:53:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-10-11 17:53:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2024-10-11 17:53:30,840 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) [2024-10-11 17:53:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 190 transitions. [2024-10-11 17:53:30,842 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 190 transitions. Word has length 45 [2024-10-11 17:53:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:30,842 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 190 transitions. [2024-10-11 17:53:30,843 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) [2024-10-11 17:53:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 190 transitions. [2024-10-11 17:53:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-11 17:53:30,843 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:30,843 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] [2024-10-11 17:53:30,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-10-11 17:53:30,843 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)] === [2024-10-11 17:53:30,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:30,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1039911399, now seen corresponding path program 1 times [2024-10-11 17:53:30,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:30,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023305368] [2024-10-11 17:53:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:30,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:53:30,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:30,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023305368] [2024-10-11 17:53:30,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023305368] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:30,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:30,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 17:53:30,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497861629] [2024-10-11 17:53:30,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:30,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:53:30,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:30,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:53:30,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:53:30,952 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) [2024-10-11 17:53:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:31,032 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2024-10-11 17:53:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:53:31,033 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 [2024-10-11 17:53:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:31,033 INFO L225 Difference]: With dead ends: 164 [2024-10-11 17:53:31,033 INFO L226 Difference]: Without dead ends: 164 [2024-10-11 17:53:31,034 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 [2024-10-11 17:53:31,036 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 [2024-10-11 17:53:31,036 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] [2024-10-11 17:53:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-10-11 17:53:31,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2024-10-11 17:53:31,038 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) [2024-10-11 17:53:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2024-10-11 17:53:31,038 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 46 [2024-10-11 17:53:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:31,038 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2024-10-11 17:53:31,039 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) [2024-10-11 17:53:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2024-10-11 17:53:31,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-11 17:53:31,039 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:31,039 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] [2024-10-11 17:53:31,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-10-11 17:53:31,039 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)] === [2024-10-11 17:53:31,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash -847271386, now seen corresponding path program 2 times [2024-10-11 17:53:31,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:31,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063176033] [2024-10-11 17:53:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:31,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,255 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,257 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:31,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:31,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063176033] [2024-10-11 17:53:31,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063176033] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:31,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714629374] [2024-10-11 17:53:31,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:53:31,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:31,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:31,263 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:31,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 17:53:31,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:53:31,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:53:31,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 17:53:31,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:31,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:31,723 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 [2024-10-11 17:53:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:31,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714629374] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:31,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:31,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2024-10-11 17:53:31,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445636810] [2024-10-11 17:53:31,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:31,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 17:53:31,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:31,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 17:53:31,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2024-10-11 17:53:31,787 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) [2024-10-11 17:53:32,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:32,361 INFO L93 Difference]: Finished difference Result 203 states and 234 transitions. [2024-10-11 17:53:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 17:53:32,362 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 [2024-10-11 17:53:32,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:32,363 INFO L225 Difference]: With dead ends: 203 [2024-10-11 17:53:32,363 INFO L226 Difference]: Without dead ends: 203 [2024-10-11 17:53:32,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 17:53:32,363 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 120 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2024-10-11 17:53:32,364 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] [2024-10-11 17:53:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-10-11 17:53:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2024-10-11 17:53:32,367 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) [2024-10-11 17:53:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 190 transitions. [2024-10-11 17:53:32,368 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 190 transitions. Word has length 46 [2024-10-11 17:53:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:32,368 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 190 transitions. [2024-10-11 17:53:32,368 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) [2024-10-11 17:53:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 190 transitions. [2024-10-11 17:53:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-11 17:53:32,368 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:32,369 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] [2024-10-11 17:53:32,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:32,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:32,569 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)] === [2024-10-11 17:53:32,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:32,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1068171013, now seen corresponding path program 1 times [2024-10-11 17:53:32,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:32,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040281516] [2024-10-11 17:53:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:32,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 17:53:32,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:32,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040281516] [2024-10-11 17:53:32,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040281516] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:32,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:32,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 17:53:32,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449490064] [2024-10-11 17:53:32,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:32,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 17:53:32,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 17:53:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-11 17:53:32,687 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) [2024-10-11 17:53:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:32,792 INFO L93 Difference]: Finished difference Result 163 states and 187 transitions. [2024-10-11 17:53:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:53:32,793 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 [2024-10-11 17:53:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:32,793 INFO L225 Difference]: With dead ends: 163 [2024-10-11 17:53:32,793 INFO L226 Difference]: Without dead ends: 163 [2024-10-11 17:53:32,794 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 [2024-10-11 17:53:32,794 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 51 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-10-11 17:53:32,794 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] [2024-10-11 17:53:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-10-11 17:53:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2024-10-11 17:53:32,796 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) [2024-10-11 17:53:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 187 transitions. [2024-10-11 17:53:32,797 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 187 transitions. Word has length 46 [2024-10-11 17:53:32,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:32,798 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 187 transitions. [2024-10-11 17:53:32,798 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) [2024-10-11 17:53:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 187 transitions. [2024-10-11 17:53:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-11 17:53:32,798 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:32,798 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] [2024-10-11 17:53:32,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-10-11 17:53:32,798 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)] === [2024-10-11 17:53:32,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:32,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2122484788, now seen corresponding path program 1 times [2024-10-11 17:53:32,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:32,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094333876] [2024-10-11 17:53:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:32,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:53:32,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:32,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094333876] [2024-10-11 17:53:32,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094333876] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:32,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:32,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 17:53:32,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150523273] [2024-10-11 17:53:32,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:32,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 17:53:32,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 17:53:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 17:53:32,990 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) [2024-10-11 17:53:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:33,098 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2024-10-11 17:53:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 17:53:33,099 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 [2024-10-11 17:53:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:33,100 INFO L225 Difference]: With dead ends: 162 [2024-10-11 17:53:33,101 INFO L226 Difference]: Without dead ends: 140 [2024-10-11 17:53:33,101 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 [2024-10-11 17:53:33,101 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 [2024-10-11 17:53:33,102 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] [2024-10-11 17:53:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-11 17:53:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-10-11 17:53:33,103 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) [2024-10-11 17:53:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2024-10-11 17:53:33,104 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 47 [2024-10-11 17:53:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:33,104 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2024-10-11 17:53:33,104 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) [2024-10-11 17:53:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2024-10-11 17:53:33,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-11 17:53:33,105 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:33,105 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] [2024-10-11 17:53:33,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-10-11 17:53:33,105 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)] === [2024-10-11 17:53:33,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash -18020766, now seen corresponding path program 1 times [2024-10-11 17:53:33,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:33,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768713310] [2024-10-11 17:53:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:33,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:53:33,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:33,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768713310] [2024-10-11 17:53:33,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768713310] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:33,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342251006] [2024-10-11 17:53:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:33,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:33,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:33,234 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:33,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 17:53:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 17:53:33,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-11 17:53:33,363 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:53:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342251006] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:33,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:53:33,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 12 [2024-10-11 17:53:33,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198427809] [2024-10-11 17:53:33,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:33,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:53:33,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:53:33,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-10-11 17:53:33,365 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) [2024-10-11 17:53:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:33,403 INFO L93 Difference]: Finished difference Result 143 states and 163 transitions. [2024-10-11 17:53:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:53:33,404 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 [2024-10-11 17:53:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:33,404 INFO L225 Difference]: With dead ends: 143 [2024-10-11 17:53:33,404 INFO L226 Difference]: Without dead ends: 143 [2024-10-11 17:53:33,404 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 [2024-10-11 17:53:33,405 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 [2024-10-11 17:53:33,405 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] [2024-10-11 17:53:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-11 17:53:33,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2024-10-11 17:53:33,406 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) [2024-10-11 17:53:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2024-10-11 17:53:33,407 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 48 [2024-10-11 17:53:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:33,407 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2024-10-11 17:53:33,407 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) [2024-10-11 17:53:33,407 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2024-10-11 17:53:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-11 17:53:33,408 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:33,408 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] [2024-10-11 17:53:33,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-11 17:53:33,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-11 17:53:33,613 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)] === [2024-10-11 17:53:33,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash 544593415, now seen corresponding path program 2 times [2024-10-11 17:53:33,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:33,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419570794] [2024-10-11 17:53:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:33,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-11 17:53:33,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:33,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419570794] [2024-10-11 17:53:33,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419570794] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:33,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915637221] [2024-10-11 17:53:33,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:53:33,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:33,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:33,689 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:33,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 17:53:33,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:53:33,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:53:33,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 17:53:33,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:33,863 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:33,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915637221] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:33,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:33,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2024-10-11 17:53:33,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610462726] [2024-10-11 17:53:33,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:33,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 17:53:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 17:53:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-10-11 17:53:33,943 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) [2024-10-11 17:53:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:34,216 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2024-10-11 17:53:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 17:53:34,217 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 [2024-10-11 17:53:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:34,217 INFO L225 Difference]: With dead ends: 164 [2024-10-11 17:53:34,217 INFO L226 Difference]: Without dead ends: 164 [2024-10-11 17:53:34,218 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 [2024-10-11 17:53:34,218 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 [2024-10-11 17:53:34,218 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] [2024-10-11 17:53:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-10-11 17:53:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2024-10-11 17:53:34,220 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) [2024-10-11 17:53:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 162 transitions. [2024-10-11 17:53:34,220 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 162 transitions. Word has length 49 [2024-10-11 17:53:34,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:34,221 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 162 transitions. [2024-10-11 17:53:34,221 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) [2024-10-11 17:53:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 162 transitions. [2024-10-11 17:53:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-11 17:53:34,221 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:34,221 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] [2024-10-11 17:53:34,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-11 17:53:34,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-11 17:53:34,422 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)] === [2024-10-11 17:53:34,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash 461080559, now seen corresponding path program 1 times [2024-10-11 17:53:34,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:34,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837122185] [2024-10-11 17:53:34,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:34,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:34,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:34,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:34,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:34,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:34,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:34,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837122185] [2024-10-11 17:53:34,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837122185] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:34,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951080469] [2024-10-11 17:53:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:34,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:34,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:34,592 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:34,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-11 17:53:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:34,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 17:53:34,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:34,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:34,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951080469] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:34,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:34,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2024-10-11 17:53:34,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880543005] [2024-10-11 17:53:34,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:34,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 17:53:34,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 17:53:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-10-11 17:53:34,950 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) [2024-10-11 17:53:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:35,345 INFO L93 Difference]: Finished difference Result 192 states and 219 transitions. [2024-10-11 17:53:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 17:53:35,348 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 [2024-10-11 17:53:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:35,349 INFO L225 Difference]: With dead ends: 192 [2024-10-11 17:53:35,349 INFO L226 Difference]: Without dead ends: 192 [2024-10-11 17:53:35,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2024-10-11 17:53:35,350 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 60 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:35,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 352 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:53:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-10-11 17:53:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 167. [2024-10-11 17:53:35,353 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) [2024-10-11 17:53:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2024-10-11 17:53:35,354 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 49 [2024-10-11 17:53:35,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:35,354 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2024-10-11 17:53:35,355 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) [2024-10-11 17:53:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2024-10-11 17:53:35,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-11 17:53:35,355 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:35,355 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] [2024-10-11 17:53:35,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:35,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-11 17:53:35,560 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)] === [2024-10-11 17:53:35,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:35,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2048590622, now seen corresponding path program 1 times [2024-10-11 17:53:35,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:35,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715700032] [2024-10-11 17:53:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:35,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:35,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:35,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:35,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:35,688 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:53:35,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:35,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715700032] [2024-10-11 17:53:35,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715700032] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:35,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232333540] [2024-10-11 17:53:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:35,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:35,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:35,691 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:35,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-11 17:53:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:35,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 17:53:35,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:53:35,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:53:35,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232333540] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:35,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:35,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2024-10-11 17:53:35,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118719850] [2024-10-11 17:53:35,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:35,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 17:53:35,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:35,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 17:53:35,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-10-11 17:53:35,937 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) [2024-10-11 17:53:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:36,095 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2024-10-11 17:53:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 17:53:36,098 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 [2024-10-11 17:53:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:36,099 INFO L225 Difference]: With dead ends: 170 [2024-10-11 17:53:36,099 INFO L226 Difference]: Without dead ends: 170 [2024-10-11 17:53:36,099 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 [2024-10-11 17:53:36,100 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 [2024-10-11 17:53:36,100 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] [2024-10-11 17:53:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-11 17:53:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2024-10-11 17:53:36,103 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) [2024-10-11 17:53:36,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2024-10-11 17:53:36,104 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 51 [2024-10-11 17:53:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:36,104 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2024-10-11 17:53:36,104 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) [2024-10-11 17:53:36,104 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2024-10-11 17:53:36,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-11 17:53:36,105 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:36,105 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] [2024-10-11 17:53:36,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:36,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-11 17:53:36,306 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)] === [2024-10-11 17:53:36,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:36,306 INFO L85 PathProgramCache]: Analyzing trace with hash 705957108, now seen corresponding path program 1 times [2024-10-11 17:53:36,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:36,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104077172] [2024-10-11 17:53:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:36,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:36,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:36,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:36,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:36,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:53:36,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:36,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104077172] [2024-10-11 17:53:36,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104077172] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:36,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195166119] [2024-10-11 17:53:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:36,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:36,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:36,416 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:36,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-11 17:53:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:36,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 17:53:36,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:53:36,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:53:36,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195166119] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:36,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:36,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-10-11 17:53:36,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012869165] [2024-10-11 17:53:36,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:36,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 17:53:36,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:36,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 17:53:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-11 17:53:36,682 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) [2024-10-11 17:53:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:36,873 INFO L93 Difference]: Finished difference Result 182 states and 212 transitions. [2024-10-11 17:53:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 17:53:36,873 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 [2024-10-11 17:53:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:36,874 INFO L225 Difference]: With dead ends: 182 [2024-10-11 17:53:36,874 INFO L226 Difference]: Without dead ends: 182 [2024-10-11 17:53:36,874 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 [2024-10-11 17:53:36,874 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, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:36,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 432 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:53:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-11 17:53:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2024-10-11 17:53:36,877 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) [2024-10-11 17:53:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 211 transitions. [2024-10-11 17:53:36,877 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 211 transitions. Word has length 51 [2024-10-11 17:53:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:36,878 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 211 transitions. [2024-10-11 17:53:36,878 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) [2024-10-11 17:53:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 211 transitions. [2024-10-11 17:53:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-11 17:53:36,878 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:36,878 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] [2024-10-11 17:53:36,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:37,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-10-11 17:53:37,079 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)] === [2024-10-11 17:53:37,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1720134806, now seen corresponding path program 3 times [2024-10-11 17:53:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:37,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087870437] [2024-10-11 17:53:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:37,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:37,296 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:37,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:37,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-11 17:53:37,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:37,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087870437] [2024-10-11 17:53:37,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087870437] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:37,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091896716] [2024-10-11 17:53:37,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:53:37,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:37,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:37,311 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:37,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-11 17:53:37,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 17:53:37,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:53:37,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-11 17:53:37,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:37,519 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 [2024-10-11 17:53:37,523 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 [2024-10-11 17:53:37,616 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-11 17:53:37,616 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 [2024-10-11 17:53:37,633 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 17:53:37,633 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 [2024-10-11 17:53:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 17:53:58,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:59,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091896716] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:59,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:53:59,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 26 [2024-10-11 17:53:59,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031004902] [2024-10-11 17:53:59,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:59,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 17:53:59,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:59,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 17:53:59,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1133, Unknown=4, NotChecked=0, Total=1260 [2024-10-11 17:53:59,547 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) [2024-10-11 17:54:03,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 17:54:07,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 17:54:24,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 17:54:28,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 17:54:32,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]