./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext2/length_test03-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext2/length_test03-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 06:44:18,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 06:44:18,070 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 06:44:18,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 06:44:18,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 06:44:18,091 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 06:44:18,092 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 06:44:18,092 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 06:44:18,093 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 06:44:18,093 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 06:44:18,094 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 06:44:18,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 06:44:18,094 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 06:44:18,095 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 06:44:18,095 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 06:44:18,095 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 06:44:18,095 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 06:44:18,096 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 06:44:18,096 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 06:44:18,096 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 06:44:18,097 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 06:44:18,100 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 06:44:18,101 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 06:44:18,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 06:44:18,101 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 06:44:18,101 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 06:44:18,101 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 06:44:18,101 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 06:44:18,102 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 06:44:18,102 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 06:44:18,102 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 06:44:18,102 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 06:44:18,103 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 06:44:18,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 06:44:18,103 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 06:44:18,103 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 06:44:18,104 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 06:44:18,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 06:44:18,105 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 06:44:18,106 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 06:44:18,106 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 06:44:18,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 06:44:18,106 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a [2024-11-19 06:44:18,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 06:44:18,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 06:44:18,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 06:44:18,353 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 06:44:18,354 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 06:44:18,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2024-11-19 06:44:19,773 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 06:44:20,013 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 06:44:20,014 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2024-11-19 06:44:20,028 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9079a1163/65128f543fa840fdae867afd9d3b31f3/FLAGbb44171f6 [2024-11-19 06:44:20,342 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9079a1163/65128f543fa840fdae867afd9d3b31f3 [2024-11-19 06:44:20,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 06:44:20,346 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 06:44:20,348 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 06:44:20,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 06:44:20,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 06:44:20,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec6c485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20, skipping insertion in model container [2024-11-19 06:44:20,354 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,393 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 06:44:20,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 06:44:20,729 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 06:44:20,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 06:44:20,798 INFO L204 MainTranslator]: Completed translation [2024-11-19 06:44:20,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20 WrapperNode [2024-11-19 06:44:20,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 06:44:20,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 06:44:20,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 06:44:20,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 06:44:20,806 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,818 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,842 INFO L138 Inliner]: procedures = 123, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 101 [2024-11-19 06:44:20,842 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 06:44:20,843 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 06:44:20,843 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 06:44:20,843 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 06:44:20,854 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,859 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,876 INFO L175 MemorySlicer]: Split 25 memory accesses to 3 slices as follows [2, 10, 13]. 52 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 13 writes are split as follows [0, 6, 7]. [2024-11-19 06:44:20,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,886 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,889 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,895 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,896 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 06:44:20,903 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 06:44:20,903 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 06:44:20,903 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 06:44:20,904 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (1/1) ... [2024-11-19 06:44:20,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 06:44:20,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:20,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 06:44:20,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 06:44:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 06:44:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 06:44:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 06:44:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 06:44:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 06:44:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-19 06:44:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-19 06:44:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-19 06:44:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-19 06:44:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-19 06:44:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-19 06:44:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 06:44:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 06:44:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 06:44:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 06:44:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 06:44:20,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 06:44:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure append [2024-11-19 06:44:20,984 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2024-11-19 06:44:21,090 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 06:44:21,093 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 06:44:21,428 INFO L? ?]: Removed 127 outVars from TransFormulas that were not future-live. [2024-11-19 06:44:21,429 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 06:44:21,445 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 06:44:21,447 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 06:44:21,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:44:21 BoogieIcfgContainer [2024-11-19 06:44:21,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 06:44:21,449 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 06:44:21,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 06:44:21,453 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 06:44:21,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:44:20" (1/3) ... [2024-11-19 06:44:21,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53343225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:44:21, skipping insertion in model container [2024-11-19 06:44:21,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:20" (2/3) ... [2024-11-19 06:44:21,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53343225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:44:21, skipping insertion in model container [2024-11-19 06:44:21,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:44:21" (3/3) ... [2024-11-19 06:44:21,456 INFO L112 eAbstractionObserver]: Analyzing ICFG length_test03-2.i [2024-11-19 06:44:21,469 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 06:44:21,469 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2024-11-19 06:44:21,510 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 06:44:21,516 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;@755f6741, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 06:44:21,516 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-19 06:44:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 67 states have (on average 2.029850746268657) internal successors, (136), 126 states have internal predecessors, (136), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-19 06:44:21,523 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:21,524 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-19 06:44:21,524 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:21,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:21,528 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2024-11-19 06:44:21,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:21,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76850116] [2024-11-19 06:44:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:21,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:21,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:21,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76850116] [2024-11-19 06:44:21,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76850116] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:21,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:21,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:44:21,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765191784] [2024-11-19 06:44:21,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:21,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:44:21,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:21,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:44:21,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:21,778 INFO L87 Difference]: Start difference. First operand has 130 states, 67 states have (on average 2.029850746268657) internal successors, (136), 126 states have internal predecessors, (136), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:21,927 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2024-11-19 06:44:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:44:21,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-19 06:44:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:21,939 INFO L225 Difference]: With dead ends: 167 [2024-11-19 06:44:21,940 INFO L226 Difference]: Without dead ends: 165 [2024-11-19 06:44:21,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:21,945 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 51 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:21,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 172 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:44:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-19 06:44:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2024-11-19 06:44:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 122 states have internal predecessors, (128), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2024-11-19 06:44:21,979 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 3 [2024-11-19 06:44:21,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:21,980 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2024-11-19 06:44:21,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2024-11-19 06:44:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-19 06:44:21,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:21,980 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-19 06:44:21,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 06:44:21,981 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:21,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:21,982 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-11-19 06:44:21,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:21,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559003671] [2024-11-19 06:44:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:21,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:22,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:22,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559003671] [2024-11-19 06:44:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559003671] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:22,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:22,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:44:22,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206282212] [2024-11-19 06:44:22,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:22,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:44:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:44:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:22,077 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:22,174 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2024-11-19 06:44:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:44:22,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-19 06:44:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:22,178 INFO L225 Difference]: With dead ends: 126 [2024-11-19 06:44:22,178 INFO L226 Difference]: Without dead ends: 126 [2024-11-19 06:44:22,178 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:22,179 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:22,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:44:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-19 06:44:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2024-11-19 06:44:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 120 states have internal predecessors, (126), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2024-11-19 06:44:22,191 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 3 [2024-11-19 06:44:22,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:22,191 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2024-11-19 06:44:22,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2024-11-19 06:44:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-19 06:44:22,192 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:22,192 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 06:44:22,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 06:44:22,193 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:22,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:22,193 INFO L85 PathProgramCache]: Analyzing trace with hash 889446152, now seen corresponding path program 1 times [2024-11-19 06:44:22,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:22,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772501091] [2024-11-19 06:44:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:22,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:22,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:22,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772501091] [2024-11-19 06:44:22,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772501091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:22,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:22,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:44:22,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63641761] [2024-11-19 06:44:22,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:22,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:44:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:44:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:22,279 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:22,372 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2024-11-19 06:44:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:44:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-19 06:44:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:22,374 INFO L225 Difference]: With dead ends: 140 [2024-11-19 06:44:22,374 INFO L226 Difference]: Without dead ends: 140 [2024-11-19 06:44:22,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:22,375 INFO L432 NwaCegarLoop]: 115 mSDtfsCounter, 24 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:22,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 177 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:44:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-19 06:44:22,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 127. [2024-11-19 06:44:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 71 states have (on average 1.8591549295774648) internal successors, (132), 123 states have internal predecessors, (132), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2024-11-19 06:44:22,382 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 6 [2024-11-19 06:44:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:22,383 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2024-11-19 06:44:22,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2024-11-19 06:44:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-19 06:44:22,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:22,383 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 06:44:22,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 06:44:22,384 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:22,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:22,384 INFO L85 PathProgramCache]: Analyzing trace with hash 889446153, now seen corresponding path program 1 times [2024-11-19 06:44:22,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:22,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676936352] [2024-11-19 06:44:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:22,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:22,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:22,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676936352] [2024-11-19 06:44:22,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676936352] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:22,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:22,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:44:22,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626854517] [2024-11-19 06:44:22,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:22,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:44:22,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:22,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:44:22,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:22,484 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:22,551 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2024-11-19 06:44:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:44:22,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-19 06:44:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:22,553 INFO L225 Difference]: With dead ends: 127 [2024-11-19 06:44:22,553 INFO L226 Difference]: Without dead ends: 127 [2024-11-19 06:44:22,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:22,558 INFO L432 NwaCegarLoop]: 124 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:22,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 194 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:44:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-19 06:44:22,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-11-19 06:44:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 71 states have (on average 1.8309859154929577) internal successors, (130), 121 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2024-11-19 06:44:22,569 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 6 [2024-11-19 06:44:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:22,571 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2024-11-19 06:44:22,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:22,571 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2024-11-19 06:44:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-19 06:44:22,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:22,572 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:22,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 06:44:22,572 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:22,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:22,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1036552302, now seen corresponding path program 1 times [2024-11-19 06:44:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:22,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808797238] [2024-11-19 06:44:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:22,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:22,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:22,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808797238] [2024-11-19 06:44:22,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808797238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:22,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:22,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:44:22,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546648364] [2024-11-19 06:44:22,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:22,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:44:22,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:44:22,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:22,792 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:22,904 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2024-11-19 06:44:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:44:22,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-19 06:44:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:22,906 INFO L225 Difference]: With dead ends: 120 [2024-11-19 06:44:22,906 INFO L226 Difference]: Without dead ends: 120 [2024-11-19 06:44:22,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:22,911 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 35 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:22,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 145 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:44:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-19 06:44:22,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-19 06:44:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 71 states have (on average 1.7605633802816902) internal successors, (125), 116 states have internal predecessors, (125), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2024-11-19 06:44:22,927 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 12 [2024-11-19 06:44:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:22,927 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2024-11-19 06:44:22,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2024-11-19 06:44:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-19 06:44:22,928 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:22,928 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:22,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 06:44:22,928 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:22,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:22,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1036552303, now seen corresponding path program 1 times [2024-11-19 06:44:22,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:22,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374268485] [2024-11-19 06:44:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:22,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:23,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:23,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374268485] [2024-11-19 06:44:23,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374268485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:23,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:23,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:44:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895235353] [2024-11-19 06:44:23,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:23,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:44:23,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:44:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:23,092 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:23,145 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2024-11-19 06:44:23,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:44:23,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-19 06:44:23,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:23,148 INFO L225 Difference]: With dead ends: 115 [2024-11-19 06:44:23,149 INFO L226 Difference]: Without dead ends: 115 [2024-11-19 06:44:23,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:23,149 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 35 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:23,150 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 154 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:44:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-19 06:44:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2024-11-19 06:44:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 71 states have (on average 1.6901408450704225) internal successors, (120), 111 states have internal predecessors, (120), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2024-11-19 06:44:23,158 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 12 [2024-11-19 06:44:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:23,159 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2024-11-19 06:44:23,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2024-11-19 06:44:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 06:44:23,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:23,163 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:23,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 06:44:23,163 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:23,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:23,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2068350391, now seen corresponding path program 1 times [2024-11-19 06:44:23,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:23,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518085011] [2024-11-19 06:44:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:23,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:23,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:23,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518085011] [2024-11-19 06:44:23,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518085011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:23,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:23,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 06:44:23,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167419947] [2024-11-19 06:44:23,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:23,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 06:44:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:23,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 06:44:23,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:44:23,374 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:23,602 INFO L93 Difference]: Finished difference Result 221 states and 242 transitions. [2024-11-19 06:44:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 06:44:23,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-19 06:44:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:23,605 INFO L225 Difference]: With dead ends: 221 [2024-11-19 06:44:23,605 INFO L226 Difference]: Without dead ends: 221 [2024-11-19 06:44:23,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-19 06:44:23,606 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 240 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:23,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 220 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:44:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-19 06:44:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 149. [2024-11-19 06:44:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 110 states have (on average 1.6181818181818182) internal successors, (178), 144 states have internal predecessors, (178), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 182 transitions. [2024-11-19 06:44:23,616 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 182 transitions. Word has length 13 [2024-11-19 06:44:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:23,616 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 182 transitions. [2024-11-19 06:44:23,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:23,617 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 182 transitions. [2024-11-19 06:44:23,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 06:44:23,617 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:23,617 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:23,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 06:44:23,619 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:23,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:23,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2068350392, now seen corresponding path program 1 times [2024-11-19 06:44:23,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:23,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404606994] [2024-11-19 06:44:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:23,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:23,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:23,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404606994] [2024-11-19 06:44:23,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404606994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:23,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:23,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 06:44:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623934519] [2024-11-19 06:44:23,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:23,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 06:44:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 06:44:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:44:23,839 INFO L87 Difference]: Start difference. First operand 149 states and 182 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:23,984 INFO L93 Difference]: Finished difference Result 171 states and 207 transitions. [2024-11-19 06:44:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 06:44:23,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-19 06:44:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:23,985 INFO L225 Difference]: With dead ends: 171 [2024-11-19 06:44:23,985 INFO L226 Difference]: Without dead ends: 171 [2024-11-19 06:44:23,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-19 06:44:23,986 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 25 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:23,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 330 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:44:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-19 06:44:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-11-19 06:44:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 129 states have (on average 1.558139534883721) internal successors, (201), 163 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:44:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 207 transitions. [2024-11-19 06:44:23,992 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 207 transitions. Word has length 13 [2024-11-19 06:44:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:23,992 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 207 transitions. [2024-11-19 06:44:23,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 207 transitions. [2024-11-19 06:44:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-19 06:44:23,993 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:23,993 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:23,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 06:44:23,994 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:23,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1480883050, now seen corresponding path program 1 times [2024-11-19 06:44:23,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:23,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577277767] [2024-11-19 06:44:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:23,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:24,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:24,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577277767] [2024-11-19 06:44:24,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577277767] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:24,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:24,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 06:44:24,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783409600] [2024-11-19 06:44:24,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:24,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 06:44:24,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:24,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 06:44:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-19 06:44:24,304 INFO L87 Difference]: Start difference. First operand 169 states and 207 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:24,478 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2024-11-19 06:44:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 06:44:24,479 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-19 06:44:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:24,480 INFO L225 Difference]: With dead ends: 171 [2024-11-19 06:44:24,480 INFO L226 Difference]: Without dead ends: 171 [2024-11-19 06:44:24,480 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-19 06:44:24,481 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 38 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:24,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 676 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:44:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-19 06:44:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-11-19 06:44:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 129 states have (on average 1.550387596899225) internal successors, (200), 163 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:44:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 206 transitions. [2024-11-19 06:44:24,485 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 206 transitions. Word has length 22 [2024-11-19 06:44:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:24,485 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 206 transitions. [2024-11-19 06:44:24,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 206 transitions. [2024-11-19 06:44:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-19 06:44:24,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:24,486 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:24,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 06:44:24,486 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:24,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash -439263795, now seen corresponding path program 1 times [2024-11-19 06:44:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:24,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117090282] [2024-11-19 06:44:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:24,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:24,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:24,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117090282] [2024-11-19 06:44:24,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117090282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:24,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:24,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 06:44:24,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606867508] [2024-11-19 06:44:24,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:24,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 06:44:24,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:24,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 06:44:24,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-19 06:44:24,809 INFO L87 Difference]: Start difference. First operand 169 states and 206 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:25,034 INFO L93 Difference]: Finished difference Result 196 states and 231 transitions. [2024-11-19 06:44:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 06:44:25,034 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-19 06:44:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:25,035 INFO L225 Difference]: With dead ends: 196 [2024-11-19 06:44:25,036 INFO L226 Difference]: Without dead ends: 196 [2024-11-19 06:44:25,036 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-19 06:44:25,036 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 113 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:25,037 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 509 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:44:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-19 06:44:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 160. [2024-11-19 06:44:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 121 states have (on average 1.5454545454545454) internal successors, (187), 154 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:44:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 193 transitions. [2024-11-19 06:44:25,040 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 193 transitions. Word has length 24 [2024-11-19 06:44:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:25,040 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 193 transitions. [2024-11-19 06:44:25,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:44:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 193 transitions. [2024-11-19 06:44:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 06:44:25,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:25,041 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:25,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 06:44:25,041 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:25,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1442887251, now seen corresponding path program 1 times [2024-11-19 06:44:25,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:25,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668517233] [2024-11-19 06:44:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:25,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:25,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668517233] [2024-11-19 06:44:25,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668517233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:25,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:44:25,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:44:25,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047014895] [2024-11-19 06:44:25,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:25,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:44:25,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:44:25,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:25,097 INFO L87 Difference]: Start difference. First operand 160 states and 193 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 06:44:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:25,108 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2024-11-19 06:44:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:44:25,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-11-19 06:44:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:25,109 INFO L225 Difference]: With dead ends: 153 [2024-11-19 06:44:25,109 INFO L226 Difference]: Without dead ends: 153 [2024-11-19 06:44:25,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:25,110 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 13 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:25,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 205 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:44:25,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-19 06:44:25,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2024-11-19 06:44:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 100 states have (on average 1.5) internal successors, (150), 133 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:44:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 156 transitions. [2024-11-19 06:44:25,118 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 156 transitions. Word has length 30 [2024-11-19 06:44:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:25,118 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 156 transitions. [2024-11-19 06:44:25,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 06:44:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 156 transitions. [2024-11-19 06:44:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-19 06:44:25,119 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:25,119 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] [2024-11-19 06:44:25,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 06:44:25,119 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:25,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash -610198618, now seen corresponding path program 1 times [2024-11-19 06:44:25,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:25,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410455248] [2024-11-19 06:44:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:25,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:25,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:25,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410455248] [2024-11-19 06:44:25,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410455248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877965692] [2024-11-19 06:44:25,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:25,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:25,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:25,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:25,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 06:44:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:25,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 06:44:25,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:44:25,906 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 [2024-11-19 06:44:25,917 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:44:25,918 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 [2024-11-19 06:44:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:25,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:26,352 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 49 treesize of output 45 [2024-11-19 06:44:26,377 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-19 06:44:26,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 49 [2024-11-19 06:44:26,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:44:26,572 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 29 treesize of output 33 [2024-11-19 06:44:26,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:44:26,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 76 [2024-11-19 06:44:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:26,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877965692] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:44:26,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:44:26,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-19 06:44:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827428314] [2024-11-19 06:44:26,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:26,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 06:44:26,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 06:44:26,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-19 06:44:26,790 INFO L87 Difference]: Start difference. First operand 139 states and 156 transitions. Second operand has 23 states, 22 states have (on average 3.5) internal successors, (77), 20 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:44:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:27,389 INFO L93 Difference]: Finished difference Result 173 states and 184 transitions. [2024-11-19 06:44:27,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 06:44:27,389 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 20 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-11-19 06:44:27,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:27,390 INFO L225 Difference]: With dead ends: 173 [2024-11-19 06:44:27,390 INFO L226 Difference]: Without dead ends: 173 [2024-11-19 06:44:27,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2024-11-19 06:44:27,391 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 390 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:27,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 600 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 06:44:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-19 06:44:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2024-11-19 06:44:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 132 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:44:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2024-11-19 06:44:27,395 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 32 [2024-11-19 06:44:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:27,395 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2024-11-19 06:44:27,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 20 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:44:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2024-11-19 06:44:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-19 06:44:27,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:27,396 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:27,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 06:44:27,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 06:44:27,601 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:27,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1027331565, now seen corresponding path program 1 times [2024-11-19 06:44:27,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:27,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26175846] [2024-11-19 06:44:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:27,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:27,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:27,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26175846] [2024-11-19 06:44:27,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26175846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:27,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043581214] [2024-11-19 06:44:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:27,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:27,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:27,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:27,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 06:44:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:27,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 06:44:27,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:27,940 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 [2024-11-19 06:44:27,952 WARN L873 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (and (= (select |c_old(#valid)| append_~node~0.base) 0) (= |c_#valid| (store |c_old(#valid)| append_~node~0.base (select |c_#valid| append_~node~0.base))))) is different from true [2024-11-19 06:44:28,003 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 06:44:28,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 06:44:28,019 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 06:44:28,020 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 12 treesize of output 14 [2024-11-19 06:44:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-19 06:44:28,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:28,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043581214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:28,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:44:28,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2024-11-19 06:44:28,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485819888] [2024-11-19 06:44:28,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:28,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 06:44:28,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:28,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 06:44:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2024-11-19 06:44:28,085 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 06:44:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:28,383 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2024-11-19 06:44:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 06:44:28,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-19 06:44:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:28,385 INFO L225 Difference]: With dead ends: 168 [2024-11-19 06:44:28,385 INFO L226 Difference]: Without dead ends: 168 [2024-11-19 06:44:28,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=250, Unknown=1, NotChecked=34, Total=380 [2024-11-19 06:44:28,385 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 116 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:28,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 327 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 323 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2024-11-19 06:44:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-19 06:44:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 141. [2024-11-19 06:44:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 105 states have (on average 1.4) internal successors, (147), 135 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:44:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2024-11-19 06:44:28,389 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 33 [2024-11-19 06:44:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:28,389 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2024-11-19 06:44:28,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 06:44:28,390 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2024-11-19 06:44:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-19 06:44:28,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:28,390 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:28,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 06:44:28,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 06:44:28,591 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:28,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1027331566, now seen corresponding path program 1 times [2024-11-19 06:44:28,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:28,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65660590] [2024-11-19 06:44:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:28,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:28,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65660590] [2024-11-19 06:44:28,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65660590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:28,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612767279] [2024-11-19 06:44:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:28,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:28,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:28,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:28,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 06:44:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:28,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 06:44:29,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:29,009 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 [2024-11-19 06:44:29,013 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 [2024-11-19 06:44:29,052 WARN L873 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (and (= (store |c_old(#length)| append_~node~0.base (select |c_#length| append_~node~0.base)) |c_#length|) (= (select |c_old(#valid)| append_~node~0.base) 0) (= |c_#valid| (store |c_old(#valid)| append_~node~0.base 1)))) is different from true [2024-11-19 06:44:29,126 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-19 06:44:29,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-19 06:44:29,130 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 14 treesize of output 9 [2024-11-19 06:44:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:44:29,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 06:44:29,236 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-19 06:44:29,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-19 06:44:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-19 06:44:29,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:29,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612767279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:29,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:44:29,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2024-11-19 06:44:29,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835950667] [2024-11-19 06:44:29,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:29,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 06:44:29,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:29,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 06:44:29,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=226, Unknown=1, NotChecked=30, Total=306 [2024-11-19 06:44:29,507 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:30,361 INFO L93 Difference]: Finished difference Result 305 states and 340 transitions. [2024-11-19 06:44:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 06:44:30,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-19 06:44:30,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:30,364 INFO L225 Difference]: With dead ends: 305 [2024-11-19 06:44:30,364 INFO L226 Difference]: Without dead ends: 305 [2024-11-19 06:44:30,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=711, Unknown=1, NotChecked=56, Total=930 [2024-11-19 06:44:30,365 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 266 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:30,365 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 637 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 759 Invalid, 0 Unknown, 250 Unchecked, 0.5s Time] [2024-11-19 06:44:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-19 06:44:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 217. [2024-11-19 06:44:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 177 states have (on average 1.4011299435028248) internal successors, (248), 206 states have internal predecessors, (248), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-19 06:44:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 262 transitions. [2024-11-19 06:44:30,370 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 262 transitions. Word has length 33 [2024-11-19 06:44:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:30,370 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 262 transitions. [2024-11-19 06:44:30,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 262 transitions. [2024-11-19 06:44:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 06:44:30,371 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:30,371 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:30,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 06:44:30,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:30,573 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:30,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:30,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1240813252, now seen corresponding path program 1 times [2024-11-19 06:44:30,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:30,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137322654] [2024-11-19 06:44:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:30,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:31,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137322654] [2024-11-19 06:44:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137322654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046054753] [2024-11-19 06:44:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:31,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:31,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:31,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:31,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 06:44:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:31,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-19 06:44:31,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:31,398 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 [2024-11-19 06:44:31,410 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 [2024-11-19 06:44:31,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:44:31,516 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 19 treesize of output 1 [2024-11-19 06:44:31,599 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-19 06:44:31,600 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 17 treesize of output 17 [2024-11-19 06:44:31,603 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 20 treesize of output 15 [2024-11-19 06:44:31,645 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 21 treesize of output 9 [2024-11-19 06:44:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:31,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:31,938 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 34 treesize of output 28 [2024-11-19 06:44:31,948 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 76 treesize of output 70 [2024-11-19 06:44:31,952 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 106 treesize of output 94 [2024-11-19 06:44:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:32,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046054753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:44:32,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:44:32,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 20 [2024-11-19 06:44:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338761883] [2024-11-19 06:44:32,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:32,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 06:44:32,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 06:44:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-11-19 06:44:32,235 INFO L87 Difference]: Start difference. First operand 217 states and 262 transitions. Second operand has 21 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:44:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:32,863 INFO L93 Difference]: Finished difference Result 226 states and 270 transitions. [2024-11-19 06:44:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 06:44:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-11-19 06:44:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:32,865 INFO L225 Difference]: With dead ends: 226 [2024-11-19 06:44:32,865 INFO L226 Difference]: Without dead ends: 226 [2024-11-19 06:44:32,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-19 06:44:32,866 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 211 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:32,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 732 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 06:44:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-19 06:44:32,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2024-11-19 06:44:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 182 states have (on average 1.3846153846153846) internal successors, (252), 212 states have internal predecessors, (252), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-19 06:44:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2024-11-19 06:44:32,871 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 41 [2024-11-19 06:44:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:32,871 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2024-11-19 06:44:32,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:44:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2024-11-19 06:44:32,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 06:44:32,872 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:32,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:32,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 06:44:33,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 06:44:33,077 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:33,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:33,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1240813253, now seen corresponding path program 1 times [2024-11-19 06:44:33,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:33,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305999117] [2024-11-19 06:44:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:33,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:33,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305999117] [2024-11-19 06:44:33,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305999117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:33,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419058094] [2024-11-19 06:44:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:33,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:33,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:33,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:33,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 06:44:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:33,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 06:44:33,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:33,640 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 [2024-11-19 06:44:33,717 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 19 treesize of output 1 [2024-11-19 06:44:33,790 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-19 06:44:33,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2024-11-19 06:44:33,832 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 21 treesize of output 9 [2024-11-19 06:44:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:33,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:33,972 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 40 treesize of output 34 [2024-11-19 06:44:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:34,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419058094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:44:34,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:44:34,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 17 [2024-11-19 06:44:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843995946] [2024-11-19 06:44:34,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:34,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 06:44:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 06:44:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-19 06:44:34,425 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 18 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:44:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:35,046 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2024-11-19 06:44:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 06:44:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-11-19 06:44:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:35,051 INFO L225 Difference]: With dead ends: 225 [2024-11-19 06:44:35,051 INFO L226 Difference]: Without dead ends: 225 [2024-11-19 06:44:35,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-19 06:44:35,052 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 142 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:35,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 642 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 06:44:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-19 06:44:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2024-11-19 06:44:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 182 states have (on average 1.379120879120879) internal successors, (251), 212 states have internal predecessors, (251), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-19 06:44:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 265 transitions. [2024-11-19 06:44:35,058 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 265 transitions. Word has length 41 [2024-11-19 06:44:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:35,059 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 265 transitions. [2024-11-19 06:44:35,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:44:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 265 transitions. [2024-11-19 06:44:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-19 06:44:35,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:35,060 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] [2024-11-19 06:44:35,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 06:44:35,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 06:44:35,264 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:35,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:35,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1836513292, now seen corresponding path program 1 times [2024-11-19 06:44:35,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:35,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633067370] [2024-11-19 06:44:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:35,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:35,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:35,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633067370] [2024-11-19 06:44:35,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633067370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:35,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920454912] [2024-11-19 06:44:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:35,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:35,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:35,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:35,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 06:44:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:36,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-19 06:44:36,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:36,047 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 [2024-11-19 06:44:36,056 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:44:36,056 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 [2024-11-19 06:44:36,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 06:44:36,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 06:44:36,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2024-11-19 06:44:36,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-19 06:44:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:36,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:36,350 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1263 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_1263) |c_ULTIMATE.start_main_~list2~0#1.base|) |c_ULTIMATE.start_main_~list2~0#1.offset|) 0)) (forall ((v_ArrVal_1262 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_1262) |c_ULTIMATE.start_main_~list2~0#1.base|) |c_ULTIMATE.start_main_~list2~0#1.offset|) 0))) is different from false [2024-11-19 06:44:36,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920454912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:36,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:44:36,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 18 [2024-11-19 06:44:36,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360930822] [2024-11-19 06:44:36,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:36,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 06:44:36,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:36,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 06:44:36,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=260, Unknown=1, NotChecked=32, Total=342 [2024-11-19 06:44:36,352 INFO L87 Difference]: Start difference. First operand 223 states and 265 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:36,746 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2024-11-19 06:44:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 06:44:36,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2024-11-19 06:44:36,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:36,747 INFO L225 Difference]: With dead ends: 304 [2024-11-19 06:44:36,747 INFO L226 Difference]: Without dead ends: 304 [2024-11-19 06:44:36,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=490, Unknown=1, NotChecked=46, Total=650 [2024-11-19 06:44:36,748 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 232 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:36,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 630 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 06:44:36,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-19 06:44:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 235. [2024-11-19 06:44:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 192 states have (on average 1.359375) internal successors, (261), 222 states have internal predecessors, (261), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-19 06:44:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 279 transitions. [2024-11-19 06:44:36,755 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 279 transitions. Word has length 42 [2024-11-19 06:44:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:36,755 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 279 transitions. [2024-11-19 06:44:36,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 279 transitions. [2024-11-19 06:44:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-19 06:44:36,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:36,756 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] [2024-11-19 06:44:36,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 06:44:36,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 06:44:36,961 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:36,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1591414825, now seen corresponding path program 1 times [2024-11-19 06:44:36,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:36,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145774991] [2024-11-19 06:44:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:36,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:38,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:38,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145774991] [2024-11-19 06:44:38,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145774991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:38,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484209172] [2024-11-19 06:44:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:38,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:38,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:38,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 06:44:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:38,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-19 06:44:38,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:38,239 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 [2024-11-19 06:44:38,258 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:44:38,258 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 [2024-11-19 06:44:38,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:44:38,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:44:38,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 13 [2024-11-19 06:44:38,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 13 [2024-11-19 06:44:38,495 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 9 treesize of output 3 [2024-11-19 06:44:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:44:38,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:38,630 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~list2~0#1.offset| 4))) (and (forall ((v_ArrVal_1438 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_1438) |c_ULTIMATE.start_main_~list2~0#1.base|) .cse0) 0)) (forall ((v_ArrVal_1439 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_1439) |c_ULTIMATE.start_main_~list2~0#1.base|) .cse0) 0)))) is different from false [2024-11-19 06:44:38,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484209172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:38,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:44:38,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 32 [2024-11-19 06:44:38,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755994805] [2024-11-19 06:44:38,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:38,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-19 06:44:38,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:38,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-19 06:44:38,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=982, Unknown=1, NotChecked=64, Total=1190 [2024-11-19 06:44:38,633 INFO L87 Difference]: Start difference. First operand 235 states and 279 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 29 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:39,598 INFO L93 Difference]: Finished difference Result 323 states and 380 transitions. [2024-11-19 06:44:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-19 06:44:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 29 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2024-11-19 06:44:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:39,599 INFO L225 Difference]: With dead ends: 323 [2024-11-19 06:44:39,600 INFO L226 Difference]: Without dead ends: 323 [2024-11-19 06:44:39,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=370, Invalid=1889, Unknown=1, NotChecked=92, Total=2352 [2024-11-19 06:44:39,601 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 273 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:39,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 978 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 06:44:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-19 06:44:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 238. [2024-11-19 06:44:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 194 states have (on average 1.3195876288659794) internal successors, (256), 225 states have internal predecessors, (256), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-19 06:44:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 276 transitions. [2024-11-19 06:44:39,606 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 276 transitions. Word has length 44 [2024-11-19 06:44:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:39,606 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 276 transitions. [2024-11-19 06:44:39,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 29 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:44:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 276 transitions. [2024-11-19 06:44:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 06:44:39,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:39,607 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2024-11-19 06:44:39,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 06:44:39,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:39,807 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:39,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1452710056, now seen corresponding path program 1 times [2024-11-19 06:44:39,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:39,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550262033] [2024-11-19 06:44:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:39,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 06:44:39,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:39,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550262033] [2024-11-19 06:44:39,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550262033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833146919] [2024-11-19 06:44:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:39,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:39,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:39,880 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:39,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 06:44:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:40,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 06:44:40,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 06:44:40,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 06:44:40,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833146919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:44:40,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:44:40,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-19 06:44:40,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455563137] [2024-11-19 06:44:40,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:40,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 06:44:40,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:40,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 06:44:40,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:44:40,047 INFO L87 Difference]: Start difference. First operand 238 states and 276 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 06:44:40,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:40,076 INFO L93 Difference]: Finished difference Result 284 states and 330 transitions. [2024-11-19 06:44:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 06:44:40,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 48 [2024-11-19 06:44:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:40,078 INFO L225 Difference]: With dead ends: 284 [2024-11-19 06:44:40,078 INFO L226 Difference]: Without dead ends: 284 [2024-11-19 06:44:40,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:44:40,079 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 71 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:40,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 216 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:44:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-19 06:44:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 274. [2024-11-19 06:44:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 226 states have (on average 1.3185840707964602) internal successors, (298), 255 states have internal predecessors, (298), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (20), 11 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-19 06:44:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 330 transitions. [2024-11-19 06:44:40,085 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 330 transitions. Word has length 48 [2024-11-19 06:44:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:40,085 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 330 transitions. [2024-11-19 06:44:40,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 06:44:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 330 transitions. [2024-11-19 06:44:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-19 06:44:40,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:40,086 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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, 1, 1, 1] [2024-11-19 06:44:40,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 06:44:40,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:40,287 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:40,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash 948068346, now seen corresponding path program 1 times [2024-11-19 06:44:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:40,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599776515] [2024-11-19 06:44:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:40,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:44:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599776515] [2024-11-19 06:44:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599776515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649499459] [2024-11-19 06:44:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:42,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:42,230 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:42,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 06:44:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:42,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-19 06:44:42,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:42,440 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 [2024-11-19 06:44:42,444 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 [2024-11-19 06:44:42,529 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 19 treesize of output 1 [2024-11-19 06:44:42,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:44:42,634 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-19 06:44:42,634 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 17 treesize of output 17 [2024-11-19 06:44:42,638 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 20 treesize of output 15 [2024-11-19 06:44:42,692 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 21 treesize of output 9 [2024-11-19 06:44:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:44:42,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:43,038 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 76 treesize of output 70 [2024-11-19 06:44:43,041 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 106 treesize of output 94 [2024-11-19 06:44:43,059 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 34 treesize of output 28 [2024-11-19 06:44:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:44:43,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649499459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:44:43,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:44:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 6, 6] total 41 [2024-11-19 06:44:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844786450] [2024-11-19 06:44:43,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:43,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-19 06:44:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-19 06:44:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2024-11-19 06:44:43,251 INFO L87 Difference]: Start difference. First operand 274 states and 330 transitions. Second operand has 42 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-19 06:44:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:45,099 INFO L93 Difference]: Finished difference Result 348 states and 399 transitions. [2024-11-19 06:44:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-19 06:44:45,100 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 60 [2024-11-19 06:44:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:45,101 INFO L225 Difference]: With dead ends: 348 [2024-11-19 06:44:45,101 INFO L226 Difference]: Without dead ends: 348 [2024-11-19 06:44:45,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=578, Invalid=3978, Unknown=0, NotChecked=0, Total=4556 [2024-11-19 06:44:45,103 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 443 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:45,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 1069 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-19 06:44:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-11-19 06:44:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 274. [2024-11-19 06:44:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 227 states have (on average 1.303964757709251) internal successors, (296), 255 states have internal predecessors, (296), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-19 06:44:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 322 transitions. [2024-11-19 06:44:45,108 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 322 transitions. Word has length 60 [2024-11-19 06:44:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:45,108 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 322 transitions. [2024-11-19 06:44:45,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-19 06:44:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 322 transitions. [2024-11-19 06:44:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-19 06:44:45,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:45,109 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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, 1, 1, 1] [2024-11-19 06:44:45,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 06:44:45,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:45,310 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:45,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:45,310 INFO L85 PathProgramCache]: Analyzing trace with hash 948068345, now seen corresponding path program 1 times [2024-11-19 06:44:45,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:45,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084671405] [2024-11-19 06:44:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:45,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:44:45,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084671405] [2024-11-19 06:44:45,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084671405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581314557] [2024-11-19 06:44:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:45,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:45,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:45,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:45,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 06:44:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:45,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-19 06:44:45,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:45,976 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 [2024-11-19 06:44:46,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-19 06:44:46,060 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-19 06:44:46,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2024-11-19 06:44:46,083 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 21 treesize of output 9 [2024-11-19 06:44:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:44:46,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:46,192 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 40 treesize of output 34 [2024-11-19 06:44:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:44:46,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581314557] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:44:46,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:44:46,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 19 [2024-11-19 06:44:46,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482911383] [2024-11-19 06:44:46,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:46,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 06:44:46,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 06:44:46,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-19 06:44:46,465 INFO L87 Difference]: Start difference. First operand 274 states and 322 transitions. Second operand has 20 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-19 06:44:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:46,917 INFO L93 Difference]: Finished difference Result 306 states and 356 transitions. [2024-11-19 06:44:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 06:44:46,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 60 [2024-11-19 06:44:46,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:46,919 INFO L225 Difference]: With dead ends: 306 [2024-11-19 06:44:46,919 INFO L226 Difference]: Without dead ends: 306 [2024-11-19 06:44:46,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2024-11-19 06:44:46,920 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 241 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:46,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 712 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 06:44:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-11-19 06:44:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 273. [2024-11-19 06:44:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 227 states have (on average 1.2951541850220265) internal successors, (294), 254 states have internal predecessors, (294), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-19 06:44:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 320 transitions. [2024-11-19 06:44:46,924 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 320 transitions. Word has length 60 [2024-11-19 06:44:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:46,925 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 320 transitions. [2024-11-19 06:44:46,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-19 06:44:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 320 transitions. [2024-11-19 06:44:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-19 06:44:46,925 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:46,926 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:46,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 06:44:47,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-19 06:44:47,130 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:47,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:47,131 INFO L85 PathProgramCache]: Analyzing trace with hash 104187406, now seen corresponding path program 1 times [2024-11-19 06:44:47,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:47,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928478329] [2024-11-19 06:44:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:47,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-19 06:44:47,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:47,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928478329] [2024-11-19 06:44:47,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928478329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:47,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852635718] [2024-11-19 06:44:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:47,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:47,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:47,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:47,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 06:44:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:47,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-19 06:44:47,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-19 06:44:47,429 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 06:44:47,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852635718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:44:47,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 06:44:47,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-11-19 06:44:47,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431647641] [2024-11-19 06:44:47,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:44:47,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:44:47,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:47,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:44:47,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:47,431 INFO L87 Difference]: Start difference. First operand 273 states and 320 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:44:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:47,439 INFO L93 Difference]: Finished difference Result 267 states and 312 transitions. [2024-11-19 06:44:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:44:47,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-11-19 06:44:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:47,441 INFO L225 Difference]: With dead ends: 267 [2024-11-19 06:44:47,441 INFO L226 Difference]: Without dead ends: 267 [2024-11-19 06:44:47,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:44:47,445 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:47,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 195 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:44:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-19 06:44:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2024-11-19 06:44:47,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 222 states have (on average 1.2882882882882882) internal successors, (286), 248 states have internal predecessors, (286), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-19 06:44:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 312 transitions. [2024-11-19 06:44:47,450 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 312 transitions. Word has length 67 [2024-11-19 06:44:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:47,450 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 312 transitions. [2024-11-19 06:44:47,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:44:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 312 transitions. [2024-11-19 06:44:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-19 06:44:47,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:47,451 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1] [2024-11-19 06:44:47,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 06:44:47,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-19 06:44:47,651 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:47,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1345239894, now seen corresponding path program 1 times [2024-11-19 06:44:47,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:47,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767783137] [2024-11-19 06:44:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:47,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:44:47,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:47,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767783137] [2024-11-19 06:44:47,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767783137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:47,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764984796] [2024-11-19 06:44:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:47,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:47,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:47,987 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:47,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 06:44:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:48,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 06:44:48,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:48,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:44:48,326 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 [2024-11-19 06:44:48,330 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:44:48,330 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 [2024-11-19 06:44:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:44:48,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:48,605 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 49 treesize of output 45 [2024-11-19 06:44:48,625 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-19 06:44:48,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 49 [2024-11-19 06:44:48,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:44:48,750 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 29 treesize of output 33 [2024-11-19 06:44:48,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:44:48,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 76 [2024-11-19 06:44:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:44:48,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764984796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:44:48,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:44:48,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-19 06:44:48,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551855267] [2024-11-19 06:44:48,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:48,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 06:44:48,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:48,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 06:44:48,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-19 06:44:48,970 INFO L87 Difference]: Start difference. First operand 267 states and 312 transitions. Second operand has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 20 states have internal predecessors, (106), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 06:44:49,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:49,377 INFO L93 Difference]: Finished difference Result 287 states and 329 transitions. [2024-11-19 06:44:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 06:44:49,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 20 states have internal predecessors, (106), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2024-11-19 06:44:49,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:49,378 INFO L225 Difference]: With dead ends: 287 [2024-11-19 06:44:49,378 INFO L226 Difference]: Without dead ends: 287 [2024-11-19 06:44:49,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2024-11-19 06:44:49,379 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 313 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:49,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 611 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 06:44:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-19 06:44:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 264. [2024-11-19 06:44:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.2727272727272727) internal successors, (280), 245 states have internal predecessors, (280), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-19 06:44:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 306 transitions. [2024-11-19 06:44:49,384 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 306 transitions. Word has length 72 [2024-11-19 06:44:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:49,384 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 306 transitions. [2024-11-19 06:44:49,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 20 states have internal predecessors, (106), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 06:44:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 306 transitions. [2024-11-19 06:44:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-19 06:44:49,385 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:49,385 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-19 06:44:49,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 06:44:49,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-19 06:44:49,588 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:49,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:49,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2134387814, now seen corresponding path program 1 times [2024-11-19 06:44:49,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:49,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852686075] [2024-11-19 06:44:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:49,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:44:50,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:50,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852686075] [2024-11-19 06:44:50,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852686075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:50,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325324908] [2024-11-19 06:44:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:50,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:50,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:50,034 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:50,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 06:44:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:50,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 06:44:50,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:50,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-19 06:44:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 06:44:50,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:50,531 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 32 treesize of output 26 [2024-11-19 06:44:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 06:44:50,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325324908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:44:50,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:44:50,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 22 [2024-11-19 06:44:50,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300358509] [2024-11-19 06:44:50,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:50,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 06:44:50,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:50,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 06:44:50,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-11-19 06:44:50,585 INFO L87 Difference]: Start difference. First operand 264 states and 306 transitions. Second operand has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 20 states have internal predecessors, (107), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 06:44:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:51,059 INFO L93 Difference]: Finished difference Result 279 states and 326 transitions. [2024-11-19 06:44:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 06:44:51,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 20 states have internal predecessors, (107), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2024-11-19 06:44:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:51,061 INFO L225 Difference]: With dead ends: 279 [2024-11-19 06:44:51,061 INFO L226 Difference]: Without dead ends: 279 [2024-11-19 06:44:51,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2024-11-19 06:44:51,062 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 51 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:51,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 963 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:44:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-11-19 06:44:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 255. [2024-11-19 06:44:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 212 states have (on average 1.2735849056603774) internal successors, (270), 236 states have internal predecessors, (270), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-19 06:44:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 294 transitions. [2024-11-19 06:44:51,067 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 294 transitions. Word has length 73 [2024-11-19 06:44:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:51,067 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 294 transitions. [2024-11-19 06:44:51,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 20 states have internal predecessors, (107), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 06:44:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 294 transitions. [2024-11-19 06:44:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-19 06:44:51,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:51,068 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2024-11-19 06:44:51,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 06:44:51,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-19 06:44:51,273 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:51,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1959490770, now seen corresponding path program 2 times [2024-11-19 06:44:51,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:51,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259130905] [2024-11-19 06:44:51,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:44:51,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:51,308 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:44:51,308 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:44:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:44:51,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:51,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259130905] [2024-11-19 06:44:51,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259130905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:51,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283241128] [2024-11-19 06:44:51,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:44:51,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:51,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:51,956 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:51,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 06:44:52,201 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:44:52,202 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:44:52,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-19 06:44:52,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:52,211 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 [2024-11-19 06:44:52,215 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 [2024-11-19 06:44:52,250 WARN L873 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (and (= (store |c_old(#length)| append_~node~0.base (select |c_#length| append_~node~0.base)) |c_#length|) (= (select |c_old(#valid)| append_~node~0.base) 0) (= |c_#valid| (store |c_old(#valid)| append_~node~0.base 1)))) is different from true [2024-11-19 06:44:52,318 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-19 06:44:52,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-19 06:44:52,321 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 14 treesize of output 9 [2024-11-19 06:44:52,382 WARN L873 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (and (= (store |c_old(#length)| append_~node~0.base (select |c_#length| append_~node~0.base)) |c_#length|) (= (select |c_old(#valid)| append_~node~0.base) 0))) is different from true [2024-11-19 06:44:52,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:44:52,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 06:44:52,437 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-19 06:44:52,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-19 06:44:52,523 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 06:44:52,523 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 14 treesize of output 13 [2024-11-19 06:44:52,612 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-19 06:44:52,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 33 [2024-11-19 06:44:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 33 not checked. [2024-11-19 06:44:52,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:52,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283241128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:52,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:44:52,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2024-11-19 06:44:52,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446002782] [2024-11-19 06:44:52,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:52,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 06:44:52,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:52,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 06:44:52,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=475, Unknown=2, NotChecked=90, Total=650 [2024-11-19 06:44:52,895 INFO L87 Difference]: Start difference. First operand 255 states and 294 transitions. Second operand has 23 states, 22 states have (on average 5.590909090909091) internal successors, (123), 19 states have internal predecessors, (123), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-19 06:44:56,970 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] [2024-11-19 06:44:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:57,842 INFO L93 Difference]: Finished difference Result 291 states and 333 transitions. [2024-11-19 06:44:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 06:44:57,842 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.590909090909091) internal successors, (123), 19 states have internal predecessors, (123), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 75 [2024-11-19 06:44:57,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:57,844 INFO L225 Difference]: With dead ends: 291 [2024-11-19 06:44:57,844 INFO L226 Difference]: Without dead ends: 291 [2024-11-19 06:44:57,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=1309, Unknown=3, NotChecked=154, Total=1722 [2024-11-19 06:44:57,845 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 346 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:57,845 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 660 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 690 Invalid, 1 Unknown, 275 Unchecked, 4.4s Time] [2024-11-19 06:44:57,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-11-19 06:44:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 167. [2024-11-19 06:44:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 136 states have (on average 1.2720588235294117) internal successors, (173), 157 states have internal predecessors, (173), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 06:44:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 185 transitions. [2024-11-19 06:44:57,849 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 185 transitions. Word has length 75 [2024-11-19 06:44:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:57,849 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 185 transitions. [2024-11-19 06:44:57,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.590909090909091) internal successors, (123), 19 states have internal predecessors, (123), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-19 06:44:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 185 transitions. [2024-11-19 06:44:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-19 06:44:57,850 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:57,851 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:44:57,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 06:44:58,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:58,055 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:58,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:58,055 INFO L85 PathProgramCache]: Analyzing trace with hash -850577045, now seen corresponding path program 1 times [2024-11-19 06:44:58,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:58,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206929533] [2024-11-19 06:44:58,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:58,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 46 proven. 67 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 06:44:58,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:44:58,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206929533] [2024-11-19 06:44:58,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206929533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:44:58,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133927867] [2024-11-19 06:44:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:58,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:44:58,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:44:58,503 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:44:58,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 06:44:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:44:58,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 06:44:58,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:44:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-19 06:44:58,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:44:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-19 06:44:58,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133927867] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:44:58,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:44:58,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 19 [2024-11-19 06:44:58,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716189141] [2024-11-19 06:44:58,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:44:58,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 06:44:58,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:44:58,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 06:44:58,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-19 06:44:58,916 INFO L87 Difference]: Start difference. First operand 167 states and 185 transitions. Second operand has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 18 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-19 06:44:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:44:59,267 INFO L93 Difference]: Finished difference Result 202 states and 210 transitions. [2024-11-19 06:44:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 06:44:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 18 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 102 [2024-11-19 06:44:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:44:59,270 INFO L225 Difference]: With dead ends: 202 [2024-11-19 06:44:59,270 INFO L226 Difference]: Without dead ends: 202 [2024-11-19 06:44:59,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 203 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 06:44:59,271 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 230 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:44:59,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 704 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:44:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-19 06:44:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 182. [2024-11-19 06:44:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 149 states have (on average 1.3020134228187918) internal successors, (194), 170 states have internal predecessors, (194), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-19 06:44:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 210 transitions. [2024-11-19 06:44:59,275 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 210 transitions. Word has length 102 [2024-11-19 06:44:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:44:59,275 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 210 transitions. [2024-11-19 06:44:59,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 18 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-19 06:44:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 210 transitions. [2024-11-19 06:44:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-19 06:44:59,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:44:59,277 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-11-19 06:44:59,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 06:44:59,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-19 06:44:59,478 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:44:59,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:44:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1160568941, now seen corresponding path program 1 times [2024-11-19 06:44:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:44:59,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758078545] [2024-11-19 06:44:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:44:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:44:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:45:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 6 proven. 235 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-19 06:45:00,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:45:00,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758078545] [2024-11-19 06:45:00,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758078545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:45:00,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49584850] [2024-11-19 06:45:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:45:00,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:45:00,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:45:00,804 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:45:00,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 06:45:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:45:01,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-11-19 06:45:01,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:45:01,367 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 19 treesize of output 1 [2024-11-19 06:45:01,418 INFO L349 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2024-11-19 06:45:01,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2024-11-19 06:45:01,427 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 26 treesize of output 9 [2024-11-19 06:45:01,815 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2024-11-19 06:45:01,815 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 26 treesize of output 19 [2024-11-19 06:45:01,825 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 06:45:01,846 INFO L349 Elim1Store]: treesize reduction 61, result has 34.4 percent of original size [2024-11-19 06:45:01,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 52 [2024-11-19 06:45:01,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 20 [2024-11-19 06:45:02,089 WARN L873 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (and (= (store |c_old(#length)| append_~node~0.base (select |c_#length| append_~node~0.base)) |c_#length|) (= (select |c_old(#valid)| append_~node~0.base) 0))) is different from true [2024-11-19 06:45:02,108 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 32 treesize of output 14 [2024-11-19 06:45:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:45:02,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 06:45:02,128 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2024-11-19 06:45:02,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2024-11-19 06:45:02,144 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 [2024-11-19 06:45:02,276 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 19 treesize of output 1 [2024-11-19 06:45:02,322 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2024-11-19 06:45:02,322 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 26 treesize of output 19 [2024-11-19 06:45:02,587 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 19 treesize of output 1 [2024-11-19 06:45:02,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:45:02,643 INFO L349 Elim1Store]: treesize reduction 39, result has 27.8 percent of original size [2024-11-19 06:45:02,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 33 [2024-11-19 06:45:02,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 42 treesize of output 11 [2024-11-19 06:45:02,653 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-19 06:45:02,653 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 17 treesize of output 17 [2024-11-19 06:45:03,056 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 45 treesize of output 27 [2024-11-19 06:45:03,059 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 23 treesize of output 11 [2024-11-19 06:45:03,080 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-19 06:45:03,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 37 [2024-11-19 06:45:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 55 proven. 238 refuted. 0 times theorem prover too weak. 3 trivial. 24 not checked. [2024-11-19 06:45:03,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:45:03,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49584850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:45:03,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:45:03,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 35] total 45 [2024-11-19 06:45:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302461075] [2024-11-19 06:45:03,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:45:03,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-19 06:45:03,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:45:03,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-19 06:45:03,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1950, Unknown=1, NotChecked=90, Total=2256 [2024-11-19 06:45:03,415 INFO L87 Difference]: Start difference. First operand 182 states and 210 transitions. Second operand has 46 states, 45 states have (on average 4.533333333333333) internal successors, (204), 42 states have internal predecessors, (204), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-19 06:45:07,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 06:45:11,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 06:45:15,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 06:45:19,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 06:45:24,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 06:45:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:45:25,240 INFO L93 Difference]: Finished difference Result 207 states and 235 transitions. [2024-11-19 06:45:25,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 06:45:25,240 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.533333333333333) internal successors, (204), 42 states have internal predecessors, (204), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 148 [2024-11-19 06:45:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:45:25,241 INFO L225 Difference]: With dead ends: 207 [2024-11-19 06:45:25,241 INFO L226 Difference]: Without dead ends: 207 [2024-11-19 06:45:25,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=609, Invalid=3950, Unknown=1, NotChecked=132, Total=4692 [2024-11-19 06:45:25,242 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 453 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 19 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2024-11-19 06:45:25,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 1069 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1174 Invalid, 5 Unknown, 145 Unchecked, 20.8s Time] [2024-11-19 06:45:25,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-19 06:45:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 181. [2024-11-19 06:45:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 149 states have (on average 1.2953020134228188) internal successors, (193), 169 states have internal predecessors, (193), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-19 06:45:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 209 transitions. [2024-11-19 06:45:25,245 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 209 transitions. Word has length 148 [2024-11-19 06:45:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:45:25,246 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 209 transitions. [2024-11-19 06:45:25,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.533333333333333) internal successors, (204), 42 states have internal predecessors, (204), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-19 06:45:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 209 transitions. [2024-11-19 06:45:25,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-19 06:45:25,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:45:25,247 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-11-19 06:45:25,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 06:45:25,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 06:45:25,451 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:45:25,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:45:25,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1384744403, now seen corresponding path program 1 times [2024-11-19 06:45:25,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:45:25,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965097783] [2024-11-19 06:45:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:45:25,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:45:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:45:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 198 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-19 06:45:27,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:45:27,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965097783] [2024-11-19 06:45:27,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965097783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:45:27,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616035487] [2024-11-19 06:45:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:45:27,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:45:27,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:45:27,467 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:45:27,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 06:45:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:45:27,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-11-19 06:45:27,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:45:27,837 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 [2024-11-19 06:45:27,844 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:45:27,845 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 [2024-11-19 06:45:27,853 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 [2024-11-19 06:45:27,885 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 [2024-11-19 06:45:27,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 27 treesize of output 22 [2024-11-19 06:45:28,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 31 treesize of output 22 [2024-11-19 06:45:28,138 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-19 06:45:28,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-19 06:45:28,292 INFO L349 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2024-11-19 06:45:28,292 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 30 treesize of output 27 [2024-11-19 06:45:28,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:45:28,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 35 [2024-11-19 06:45:28,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:45:28,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2024-11-19 06:45:28,575 INFO L349 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2024-11-19 06:45:28,576 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 38 treesize of output 35 [2024-11-19 06:45:28,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:45:28,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2024-11-19 06:45:28,787 INFO L349 Elim1Store]: treesize reduction 56, result has 47.7 percent of original size [2024-11-19 06:45:28,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 65 [2024-11-19 06:45:28,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:45:28,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2024-11-19 06:45:29,004 INFO L349 Elim1Store]: treesize reduction 56, result has 47.7 percent of original size [2024-11-19 06:45:29,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 65 [2024-11-19 06:45:29,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 41 [2024-11-19 06:45:29,374 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 31 treesize of output 23 [2024-11-19 06:45:29,397 INFO L349 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2024-11-19 06:45:29,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 54 [2024-11-19 06:45:29,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:45:29,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 39 [2024-11-19 06:45:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 36 proven. 183 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-19 06:45:29,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:45:33,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616035487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:45:33,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:45:33,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 40 [2024-11-19 06:45:33,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597064499] [2024-11-19 06:45:33,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:45:33,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-19 06:45:33,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:45:33,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-19 06:45:33,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1549, Unknown=18, NotChecked=0, Total=1722 [2024-11-19 06:45:33,709 INFO L87 Difference]: Start difference. First operand 181 states and 209 transitions. Second operand has 41 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 5 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-19 06:45:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:45:35,417 INFO L93 Difference]: Finished difference Result 274 states and 307 transitions. [2024-11-19 06:45:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-19 06:45:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 5 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 150 [2024-11-19 06:45:35,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:45:35,418 INFO L225 Difference]: With dead ends: 274 [2024-11-19 06:45:35,419 INFO L226 Difference]: Without dead ends: 274 [2024-11-19 06:45:35,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=568, Invalid=3969, Unknown=19, NotChecked=0, Total=4556 [2024-11-19 06:45:35,420 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 352 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-19 06:45:35,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 953 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-19 06:45:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-19 06:45:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 179. [2024-11-19 06:45:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 150 states have (on average 1.2466666666666666) internal successors, (187), 167 states have internal predecessors, (187), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-19 06:45:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 203 transitions. [2024-11-19 06:45:35,425 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 203 transitions. Word has length 150 [2024-11-19 06:45:35,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:45:35,425 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 203 transitions. [2024-11-19 06:45:35,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 5 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-19 06:45:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 203 transitions. [2024-11-19 06:45:35,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-19 06:45:35,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:45:35,426 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-11-19 06:45:35,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 06:45:35,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 06:45:35,631 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-19 06:45:35,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:45:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1384744404, now seen corresponding path program 1 times [2024-11-19 06:45:35,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:45:35,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885864941] [2024-11-19 06:45:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:45:35,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:45:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:45:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 12 proven. 254 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-19 06:45:38,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:45:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885864941] [2024-11-19 06:45:38,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885864941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:45:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007589501] [2024-11-19 06:45:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:45:38,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:45:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:45:38,570 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:45:38,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 06:45:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:45:38,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-11-19 06:45:38,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:45:38,989 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 [2024-11-19 06:45:39,023 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:45:39,023 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 [2024-11-19 06:45:39,066 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 [2024-11-19 06:45:39,070 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 [2024-11-19 06:45:39,128 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 [2024-11-19 06:45:39,137 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 [2024-11-19 06:45:39,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-19 06:45:39,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 27 [2024-11-19 06:45:39,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2024-11-19 06:45:39,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 27 [2024-11-19 06:45:39,692 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-19 06:45:39,692 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 15 treesize of output 15 [2024-11-19 06:45:39,695 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 18 treesize of output 13 [2024-11-19 06:45:39,799 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 [2024-11-19 06:45:40,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2024-11-19 06:45:40,071 INFO L349 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2024-11-19 06:45:40,071 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 26 treesize of output 25 [2024-11-19 06:45:40,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 31 [2024-11-19 06:45:40,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2024-11-19 06:45:40,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:45:40,669 INFO L349 Elim1Store]: treesize reduction 45, result has 31.8 percent of original size [2024-11-19 06:45:40,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 49 [2024-11-19 06:45:40,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 53 [2024-11-19 06:45:40,688 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-19 06:45:40,688 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 15 treesize of output 15 [2024-11-19 06:45:41,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2024-11-19 06:45:41,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 77 [2024-11-19 06:45:41,404 INFO L349 Elim1Store]: treesize reduction 82, result has 51.8 percent of original size [2024-11-19 06:45:41,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 94 treesize of output 164 [2024-11-19 06:45:41,493 INFO L349 Elim1Store]: treesize reduction 76, result has 58.9 percent of original size [2024-11-19 06:45:41,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 169