./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/length_test03-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/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-wip.dd.update-z3-fca748b-m [2024-11-20 14:40:27,031 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 14:40:27,089 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 14:40:27,095 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 14:40:27,096 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 14:40:27,123 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 14:40:27,124 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 14:40:27,124 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 14:40:27,124 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 14:40:27,125 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 14:40:27,125 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 14:40:27,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 14:40:27,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 14:40:27,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 14:40:27,126 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 14:40:27,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 14:40:27,126 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 14:40:27,126 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 14:40:27,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 14:40:27,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 14:40:27,127 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 14:40:27,130 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 14:40:27,130 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 14:40:27,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 14:40:27,130 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 14:40:27,130 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 14:40:27,130 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 14:40:27,131 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 14:40:27,131 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 14:40:27,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 14:40:27,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 14:40:27,131 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 14:40:27,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 14:40:27,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 14:40:27,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 14:40:27,132 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 14:40:27,132 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 14:40:27,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 14:40:27,132 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 14:40:27,133 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 14:40:27,133 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 14:40:27,133 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 14:40:27,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a [2024-11-20 14:40:27,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 14:40:27,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 14:40:27,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 14:40:27,362 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 14:40:27,362 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 14:40:27,363 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2024-11-20 14:40:28,611 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 14:40:28,816 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 14:40:28,816 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2024-11-20 14:40:28,830 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00b8f00a1/69a004973abb4858b9ce07187dd36c6b/FLAG6fe91d4cf [2024-11-20 14:40:28,844 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00b8f00a1/69a004973abb4858b9ce07187dd36c6b [2024-11-20 14:40:28,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 14:40:28,848 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 14:40:28,848 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 14:40:28,850 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 14:40:28,854 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 14:40:28,854 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:40:28" (1/1) ... [2024-11-20 14:40:28,855 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6386631f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:28, skipping insertion in model container [2024-11-20 14:40:28,855 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:40:28" (1/1) ... [2024-11-20 14:40:28,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 14:40:29,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 14:40:29,192 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 14:40:29,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 14:40:29,251 INFO L204 MainTranslator]: Completed translation [2024-11-20 14:40:29,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29 WrapperNode [2024-11-20 14:40:29,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 14:40:29,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 14:40:29,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 14:40:29,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 14:40:29,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,271 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,292 INFO L138 Inliner]: procedures = 123, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 101 [2024-11-20 14:40:29,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 14:40:29,293 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 14:40:29,293 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 14:40:29,293 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 14:40:29,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,304 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,318 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]. [2024-11-20 14:40:29,318 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,318 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,326 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,327 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,328 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,330 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 14:40:29,331 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 14:40:29,331 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 14:40:29,331 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 14:40:29,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (1/1) ... [2024-11-20 14:40:29,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 14:40:29,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:29,361 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) [2024-11-20 14:40:29,364 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 [2024-11-20 14:40:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 14:40:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 14:40:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 14:40:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 14:40:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 14:40:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-20 14:40:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-20 14:40:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-20 14:40:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-20 14:40:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-20 14:40:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-20 14:40:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-20 14:40:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 14:40:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 14:40:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 14:40:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 14:40:29,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 14:40:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure append [2024-11-20 14:40:29,397 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2024-11-20 14:40:29,466 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 14:40:29,468 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 14:40:29,770 INFO L? ?]: Removed 127 outVars from TransFormulas that were not future-live. [2024-11-20 14:40:29,771 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 14:40:29,783 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 14:40:29,786 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 14:40:29,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:40:29 BoogieIcfgContainer [2024-11-20 14:40:29,787 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 14:40:29,789 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 14:40:29,790 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 14:40:29,792 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 14:40:29,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:40:28" (1/3) ... [2024-11-20 14:40:29,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a38c4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:40:29, skipping insertion in model container [2024-11-20 14:40:29,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:40:29" (2/3) ... [2024-11-20 14:40:29,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a38c4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:40:29, skipping insertion in model container [2024-11-20 14:40:29,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:40:29" (3/3) ... [2024-11-20 14:40:29,795 INFO L112 eAbstractionObserver]: Analyzing ICFG length_test03-2.i [2024-11-20 14:40:29,807 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 14:40:29,807 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2024-11-20 14:40:29,850 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 14:40:29,855 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;@2b8a1a88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 14:40:29,856 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-20 14:40:29,859 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) [2024-11-20 14:40:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-20 14:40:29,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:29,864 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-20 14:40:29,865 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)] === [2024-11-20 14:40:29,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2024-11-20 14:40:29,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:29,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051750411] [2024-11-20 14:40:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:30,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:30,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051750411] [2024-11-20 14:40:30,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051750411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:30,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:30,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:40:30,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842128345] [2024-11-20 14:40:30,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:30,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:40:30,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:40:30,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:40:30,093 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) [2024-11-20 14:40:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:30,252 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2024-11-20 14:40:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:40:30,256 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 [2024-11-20 14:40:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:30,263 INFO L225 Difference]: With dead ends: 167 [2024-11-20 14:40:30,263 INFO L226 Difference]: Without dead ends: 165 [2024-11-20 14:40:30,264 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 [2024-11-20 14:40:30,268 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 [2024-11-20 14:40:30,269 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] [2024-11-20 14:40:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-20 14:40:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2024-11-20 14:40:30,302 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) [2024-11-20 14:40:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2024-11-20 14:40:30,307 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 3 [2024-11-20 14:40:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:30,307 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2024-11-20 14:40:30,307 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) [2024-11-20 14:40:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2024-11-20 14:40:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-20 14:40:30,308 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:30,308 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-20 14:40:30,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 14:40:30,308 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)] === [2024-11-20 14:40:30,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:30,309 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-11-20 14:40:30,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:30,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981371152] [2024-11-20 14:40:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:30,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:30,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:30,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981371152] [2024-11-20 14:40:30,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981371152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:30,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:30,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:40:30,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087507520] [2024-11-20 14:40:30,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:30,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:40:30,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:30,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:40:30,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:40:30,382 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) [2024-11-20 14:40:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:30,445 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2024-11-20 14:40:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:40:30,445 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 [2024-11-20 14:40:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:30,446 INFO L225 Difference]: With dead ends: 126 [2024-11-20 14:40:30,446 INFO L226 Difference]: Without dead ends: 126 [2024-11-20 14:40:30,446 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 [2024-11-20 14:40:30,447 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-11-20 14:40:30,448 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] [2024-11-20 14:40:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-20 14:40:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2024-11-20 14:40:30,457 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) [2024-11-20 14:40:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2024-11-20 14:40:30,460 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 3 [2024-11-20 14:40:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:30,461 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2024-11-20 14:40:30,461 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) [2024-11-20 14:40:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2024-11-20 14:40:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-20 14:40:30,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:30,461 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 14:40:30,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 14:40:30,462 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)] === [2024-11-20 14:40:30,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash 889446152, now seen corresponding path program 1 times [2024-11-20 14:40:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:30,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903195441] [2024-11-20 14:40:30,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:30,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:30,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:30,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903195441] [2024-11-20 14:40:30,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903195441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:30,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:30,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:40:30,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551540231] [2024-11-20 14:40:30,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:30,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:40:30,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:30,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:40:30,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:40:30,511 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) [2024-11-20 14:40:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:30,583 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2024-11-20 14:40:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:40:30,585 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 [2024-11-20 14:40:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:30,586 INFO L225 Difference]: With dead ends: 140 [2024-11-20 14:40:30,586 INFO L226 Difference]: Without dead ends: 140 [2024-11-20 14:40:30,587 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 [2024-11-20 14:40:30,587 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 [2024-11-20 14:40:30,588 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] [2024-11-20 14:40:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-20 14:40:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 127. [2024-11-20 14:40:30,597 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) [2024-11-20 14:40:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2024-11-20 14:40:30,600 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 6 [2024-11-20 14:40:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:30,600 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2024-11-20 14:40:30,600 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) [2024-11-20 14:40:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2024-11-20 14:40:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-20 14:40:30,600 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:30,600 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 14:40:30,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 14:40:30,601 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)] === [2024-11-20 14:40:30,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash 889446153, now seen corresponding path program 1 times [2024-11-20 14:40:30,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:30,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495990354] [2024-11-20 14:40:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:30,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495990354] [2024-11-20 14:40:30,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495990354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:30,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:30,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:40:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829177134] [2024-11-20 14:40:30,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:30,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:40:30,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:30,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:40:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:40:30,680 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) [2024-11-20 14:40:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:30,763 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2024-11-20 14:40:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:40:30,764 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 [2024-11-20 14:40:30,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:30,764 INFO L225 Difference]: With dead ends: 127 [2024-11-20 14:40:30,765 INFO L226 Difference]: Without dead ends: 127 [2024-11-20 14:40:30,765 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 [2024-11-20 14:40:30,766 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 [2024-11-20 14:40:30,766 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] [2024-11-20 14:40:30,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-20 14:40:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-11-20 14:40:30,771 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) [2024-11-20 14:40:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2024-11-20 14:40:30,772 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 6 [2024-11-20 14:40:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:30,772 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2024-11-20 14:40:30,772 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) [2024-11-20 14:40:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2024-11-20 14:40:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-20 14:40:30,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:30,773 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:40:30,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 14:40:30,773 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:30,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1036552302, now seen corresponding path program 1 times [2024-11-20 14:40:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:30,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885581623] [2024-11-20 14:40:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:30,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:30,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:30,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885581623] [2024-11-20 14:40:30,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885581623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:30,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:30,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:40:30,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272587933] [2024-11-20 14:40:30,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:30,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:40:30,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:30,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:40:30,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:40:30,862 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) [2024-11-20 14:40:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:30,942 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2024-11-20 14:40:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:40:30,943 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 [2024-11-20 14:40:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:30,943 INFO L225 Difference]: With dead ends: 120 [2024-11-20 14:40:30,943 INFO L226 Difference]: Without dead ends: 120 [2024-11-20 14:40:30,944 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 [2024-11-20 14:40:30,945 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 [2024-11-20 14:40:30,946 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] [2024-11-20 14:40:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-20 14:40:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-20 14:40:30,970 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) [2024-11-20 14:40:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2024-11-20 14:40:30,973 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 12 [2024-11-20 14:40:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:30,974 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2024-11-20 14:40:30,974 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) [2024-11-20 14:40:30,976 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2024-11-20 14:40:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-20 14:40:30,976 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:30,976 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:40:30,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 14:40:30,977 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:30,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:30,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1036552303, now seen corresponding path program 1 times [2024-11-20 14:40:30,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:30,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436908369] [2024-11-20 14:40:30,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:30,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:31,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:31,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436908369] [2024-11-20 14:40:31,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436908369] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:31,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:31,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:40:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848412603] [2024-11-20 14:40:31,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:31,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:40:31,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:40:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:40:31,095 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) [2024-11-20 14:40:31,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:31,150 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2024-11-20 14:40:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:40:31,150 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 [2024-11-20 14:40:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:31,151 INFO L225 Difference]: With dead ends: 115 [2024-11-20 14:40:31,151 INFO L226 Difference]: Without dead ends: 115 [2024-11-20 14:40:31,151 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 [2024-11-20 14:40:31,152 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 [2024-11-20 14:40:31,152 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] [2024-11-20 14:40:31,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-20 14:40:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2024-11-20 14:40:31,159 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) [2024-11-20 14:40:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2024-11-20 14:40:31,160 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 12 [2024-11-20 14:40:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:31,160 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2024-11-20 14:40:31,160 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) [2024-11-20 14:40:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2024-11-20 14:40:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-20 14:40:31,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:31,161 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:40:31,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 14:40:31,161 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:31,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:31,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2068350391, now seen corresponding path program 1 times [2024-11-20 14:40:31,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:31,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058343115] [2024-11-20 14:40:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:31,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:31,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:31,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058343115] [2024-11-20 14:40:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058343115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:31,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:31,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:40:31,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529088298] [2024-11-20 14:40:31,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:31,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:40:31,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:40:31,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:40:31,327 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) [2024-11-20 14:40:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:31,496 INFO L93 Difference]: Finished difference Result 221 states and 242 transitions. [2024-11-20 14:40:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:40:31,496 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 [2024-11-20 14:40:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:31,497 INFO L225 Difference]: With dead ends: 221 [2024-11-20 14:40:31,497 INFO L226 Difference]: Without dead ends: 221 [2024-11-20 14:40:31,497 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 [2024-11-20 14:40:31,498 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 240 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-11-20 14:40:31,498 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] [2024-11-20 14:40:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-20 14:40:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 149. [2024-11-20 14:40:31,502 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) [2024-11-20 14:40:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 182 transitions. [2024-11-20 14:40:31,503 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 182 transitions. Word has length 13 [2024-11-20 14:40:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:31,503 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 182 transitions. [2024-11-20 14:40:31,503 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) [2024-11-20 14:40:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 182 transitions. [2024-11-20 14:40:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-20 14:40:31,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:31,504 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:40:31,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 14:40:31,504 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:31,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2068350392, now seen corresponding path program 1 times [2024-11-20 14:40:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544397609] [2024-11-20 14:40:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:31,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:31,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:31,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544397609] [2024-11-20 14:40:31,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544397609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:31,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:31,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:40:31,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715236887] [2024-11-20 14:40:31,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:31,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:40:31,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:40:31,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:40:31,736 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) [2024-11-20 14:40:31,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:31,885 INFO L93 Difference]: Finished difference Result 171 states and 207 transitions. [2024-11-20 14:40:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 14:40:31,885 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 [2024-11-20 14:40:31,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:31,886 INFO L225 Difference]: With dead ends: 171 [2024-11-20 14:40:31,886 INFO L226 Difference]: Without dead ends: 171 [2024-11-20 14:40:31,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:40:31,888 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 [2024-11-20 14:40:31,888 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] [2024-11-20 14:40:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-20 14:40:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-11-20 14:40:31,894 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) [2024-11-20 14:40:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 207 transitions. [2024-11-20 14:40:31,894 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 207 transitions. Word has length 13 [2024-11-20 14:40:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:31,894 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 207 transitions. [2024-11-20 14:40:31,894 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) [2024-11-20 14:40:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 207 transitions. [2024-11-20 14:40:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-20 14:40:31,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:31,895 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] [2024-11-20 14:40:31,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 14:40:31,895 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:31,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1480883050, now seen corresponding path program 1 times [2024-11-20 14:40:31,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:31,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556969635] [2024-11-20 14:40:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:31,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556969635] [2024-11-20 14:40:32,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556969635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:32,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:32,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 14:40:32,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59673768] [2024-11-20 14:40:32,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:32,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 14:40:32,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 14:40:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-20 14:40:32,270 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) [2024-11-20 14:40:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:32,450 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2024-11-20 14:40:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 14:40:32,451 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 [2024-11-20 14:40:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:32,452 INFO L225 Difference]: With dead ends: 171 [2024-11-20 14:40:32,452 INFO L226 Difference]: Without dead ends: 171 [2024-11-20 14:40:32,452 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 [2024-11-20 14:40:32,453 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 [2024-11-20 14:40:32,453 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] [2024-11-20 14:40:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-20 14:40:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-11-20 14:40:32,458 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) [2024-11-20 14:40:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 206 transitions. [2024-11-20 14:40:32,458 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 206 transitions. Word has length 22 [2024-11-20 14:40:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:32,459 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 206 transitions. [2024-11-20 14:40:32,459 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) [2024-11-20 14:40:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 206 transitions. [2024-11-20 14:40:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-20 14:40:32,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:32,460 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] [2024-11-20 14:40:32,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 14:40:32,460 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:32,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:32,461 INFO L85 PathProgramCache]: Analyzing trace with hash -439263795, now seen corresponding path program 1 times [2024-11-20 14:40:32,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:32,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611668314] [2024-11-20 14:40:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:32,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:32,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:32,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611668314] [2024-11-20 14:40:32,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611668314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:32,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:32,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-20 14:40:32,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725508070] [2024-11-20 14:40:32,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:32,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 14:40:32,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:32,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 14:40:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:40:32,791 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) [2024-11-20 14:40:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:33,005 INFO L93 Difference]: Finished difference Result 196 states and 231 transitions. [2024-11-20 14:40:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 14:40:33,005 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 [2024-11-20 14:40:33,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:33,006 INFO L225 Difference]: With dead ends: 196 [2024-11-20 14:40:33,006 INFO L226 Difference]: Without dead ends: 196 [2024-11-20 14:40:33,006 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 [2024-11-20 14:40:33,007 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 [2024-11-20 14:40:33,007 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] [2024-11-20 14:40:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-20 14:40:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 160. [2024-11-20 14:40:33,010 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) [2024-11-20 14:40:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 193 transitions. [2024-11-20 14:40:33,011 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 193 transitions. Word has length 24 [2024-11-20 14:40:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:33,011 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 193 transitions. [2024-11-20 14:40:33,011 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) [2024-11-20 14:40:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 193 transitions. [2024-11-20 14:40:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-20 14:40:33,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:33,012 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] [2024-11-20 14:40:33,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 14:40:33,012 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)] === [2024-11-20 14:40:33,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1442887251, now seen corresponding path program 1 times [2024-11-20 14:40:33,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:33,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309008113] [2024-11-20 14:40:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:33,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:33,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:33,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:33,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309008113] [2024-11-20 14:40:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309008113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:33,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:40:33,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:40:33,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823016996] [2024-11-20 14:40:33,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:33,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:40:33,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:33,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:40:33,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:40:33,103 INFO L87 Difference]: Start difference. First operand 160 states and 193 transitions. Second operand has 4 states, 4 states have (on average 7.0) 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) [2024-11-20 14:40:33,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:33,176 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2024-11-20 14:40:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:40:33,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) 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 [2024-11-20 14:40:33,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:33,177 INFO L225 Difference]: With dead ends: 153 [2024-11-20 14:40:33,177 INFO L226 Difference]: Without dead ends: 153 [2024-11-20 14:40:33,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:40:33,178 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 13 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:33,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 248 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:40:33,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-20 14:40:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2024-11-20 14:40:33,181 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) [2024-11-20 14:40:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 156 transitions. [2024-11-20 14:40:33,181 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 156 transitions. Word has length 30 [2024-11-20 14:40:33,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:33,182 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 156 transitions. [2024-11-20 14:40:33,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) 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) [2024-11-20 14:40:33,182 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 156 transitions. [2024-11-20 14:40:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-20 14:40:33,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:33,183 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] [2024-11-20 14:40:33,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 14:40:33,184 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:33,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash -610198618, now seen corresponding path program 1 times [2024-11-20 14:40:33,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:33,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113528476] [2024-11-20 14:40:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:33,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:33,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:33,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:33,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113528476] [2024-11-20 14:40:33,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113528476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:33,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445650310] [2024-11-20 14:40:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:33,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:33,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:33,481 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) [2024-11-20 14:40:33,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 14:40:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:33,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 14:40:33,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:40:33,843 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 [2024-11-20 14:40:33,864 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:40:33,864 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 [2024-11-20 14:40:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:33,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:34,143 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 [2024-11-20 14:40:34,165 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-20 14:40:34,165 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 [2024-11-20 14:40:34,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:40:34,327 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 [2024-11-20 14:40:34,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:40:34,442 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 [2024-11-20 14:40:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445650310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:40:34,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:40:34,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-20 14:40:34,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905605765] [2024-11-20 14:40:34,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:34,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 14:40:34,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:34,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 14:40:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-20 14:40:34,517 INFO L87 Difference]: Start difference. First operand 139 states and 156 transitions. Second operand has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 20 states have internal predecessors, (77), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-20 14:40:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:35,082 INFO L93 Difference]: Finished difference Result 173 states and 184 transitions. [2024-11-20 14:40:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 14:40:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 20 states have internal predecessors, (77), 5 states have call successors, (5), 5 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 [2024-11-20 14:40:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:35,084 INFO L225 Difference]: With dead ends: 173 [2024-11-20 14:40:35,084 INFO L226 Difference]: Without dead ends: 173 [2024-11-20 14:40:35,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2024-11-20 14:40:35,085 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 374 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:35,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 596 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-20 14:40:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-20 14:40:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2024-11-20 14:40:35,089 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) [2024-11-20 14:40:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2024-11-20 14:40:35,090 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 32 [2024-11-20 14:40:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:35,090 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2024-11-20 14:40:35,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 20 states have internal predecessors, (77), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-20 14:40:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2024-11-20 14:40:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-20 14:40:35,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:35,091 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] [2024-11-20 14:40:35,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 14:40:35,291 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 [2024-11-20 14:40:35,291 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:35,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:35,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1027331565, now seen corresponding path program 1 times [2024-11-20 14:40:35,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:35,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232858795] [2024-11-20 14:40:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:35,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:35,450 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:35,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232858795] [2024-11-20 14:40:35,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232858795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260172866] [2024-11-20 14:40:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:35,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:35,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:35,521 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) [2024-11-20 14:40:35,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 14:40:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:35,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 14:40:35,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:35,633 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 [2024-11-20 14:40:35,651 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 [2024-11-20 14:40:35,709 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 14:40:35,709 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 [2024-11-20 14:40:35,729 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-20 14:40:35,729 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 [2024-11-20 14:40:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-20 14:40:35,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:35,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260172866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:35,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:40:35,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2024-11-20 14:40:35,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060171216] [2024-11-20 14:40:35,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:35,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 14:40:35,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:35,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 14:40:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2024-11-20 14:40:35,790 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand has 11 states, 10 states have (on average 4.7) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-20 14:40:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:36,098 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2024-11-20 14:40:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 14:40:36,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-20 14:40:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:36,099 INFO L225 Difference]: With dead ends: 168 [2024-11-20 14:40:36,099 INFO L226 Difference]: Without dead ends: 168 [2024-11-20 14:40:36,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=283, Unknown=1, NotChecked=36, Total=420 [2024-11-20 14:40:36,100 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 118 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:36,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 325 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 307 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2024-11-20 14:40:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-20 14:40:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 141. [2024-11-20 14:40:36,103 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) [2024-11-20 14:40:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2024-11-20 14:40:36,103 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 33 [2024-11-20 14:40:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:36,104 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2024-11-20 14:40:36,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-20 14:40:36,104 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2024-11-20 14:40:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-20 14:40:36,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:36,105 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] [2024-11-20 14:40:36,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 14:40:36,308 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 [2024-11-20 14:40:36,309 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:36,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1027331566, now seen corresponding path program 1 times [2024-11-20 14:40:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:36,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951832584] [2024-11-20 14:40:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:36,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:36,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:36,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951832584] [2024-11-20 14:40:36,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951832584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:36,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919346128] [2024-11-20 14:40:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:36,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:36,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:36,590 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) [2024-11-20 14:40:36,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 14:40:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:36,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 14:40:36,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:36,705 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 [2024-11-20 14:40:36,708 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 [2024-11-20 14:40:36,756 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 [2024-11-20 14:40:36,831 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 14:40:36,832 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 [2024-11-20 14:40:36,835 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 [2024-11-20 14:40:36,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:40:36,939 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 [2024-11-20 14:40:36,949 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-20 14:40:36,949 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 [2024-11-20 14:40:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-20 14:40:36,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:37,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919346128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:37,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:40:37,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-11-20 14:40:37,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622765947] [2024-11-20 14:40:37,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:37,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 14:40:37,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:37,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 14:40:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=256, Unknown=1, NotChecked=32, Total=342 [2024-11-20 14:40:37,201 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:40:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:38,054 INFO L93 Difference]: Finished difference Result 305 states and 340 transitions. [2024-11-20 14:40:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 14:40:38,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (4), 4 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 [2024-11-20 14:40:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:38,056 INFO L225 Difference]: With dead ends: 305 [2024-11-20 14:40:38,056 INFO L226 Difference]: Without dead ends: 305 [2024-11-20 14:40:38,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=764, Unknown=2, NotChecked=58, Total=992 [2024-11-20 14:40:38,058 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 321 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:38,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 665 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 768 Invalid, 0 Unknown, 250 Unchecked, 0.5s Time] [2024-11-20 14:40:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-20 14:40:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 217. [2024-11-20 14:40:38,062 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) [2024-11-20 14:40:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 262 transitions. [2024-11-20 14:40:38,063 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 262 transitions. Word has length 33 [2024-11-20 14:40:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:38,063 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 262 transitions. [2024-11-20 14:40:38,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:40:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 262 transitions. [2024-11-20 14:40:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-20 14:40:38,067 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:38,067 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] [2024-11-20 14:40:38,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 14:40:38,267 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 [2024-11-20 14:40:38,268 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:38,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1240813252, now seen corresponding path program 1 times [2024-11-20 14:40:38,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:38,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213030367] [2024-11-20 14:40:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:38,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:38,892 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:39,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:39,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213030367] [2024-11-20 14:40:39,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213030367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:39,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886571108] [2024-11-20 14:40:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:39,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:39,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:39,180 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) [2024-11-20 14:40:39,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 14:40:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:39,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-20 14:40:39,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:39,297 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 [2024-11-20 14:40:39,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 14:40:39,384 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 [2024-11-20 14:40:39,388 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 [2024-11-20 14:40:39,480 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-20 14:40:39,480 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 [2024-11-20 14:40:39,483 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 [2024-11-20 14:40:39,529 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 [2024-11-20 14:40:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:39,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:39,848 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 [2024-11-20 14:40:39,851 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 [2024-11-20 14:40:39,871 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 [2024-11-20 14:40:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:40,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886571108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:40:40,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:40:40,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 25 [2024-11-20 14:40:40,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3744309] [2024-11-20 14:40:40,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:40,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 14:40:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 14:40:40,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-11-20 14:40:40,063 INFO L87 Difference]: Start difference. First operand 217 states and 262 transitions. Second operand has 26 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-20 14:40:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:40,662 INFO L93 Difference]: Finished difference Result 267 states and 322 transitions. [2024-11-20 14:40:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 14:40:40,662 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 5 states have call successors, (5), 5 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 [2024-11-20 14:40:40,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:40,664 INFO L225 Difference]: With dead ends: 267 [2024-11-20 14:40:40,664 INFO L226 Difference]: Without dead ends: 267 [2024-11-20 14:40:40,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2024-11-20 14:40:40,665 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 285 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:40,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 757 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-20 14:40:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-20 14:40:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 223. [2024-11-20 14:40:40,668 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) [2024-11-20 14:40:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2024-11-20 14:40:40,669 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 41 [2024-11-20 14:40:40,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:40,669 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2024-11-20 14:40:40,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-20 14:40:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2024-11-20 14:40:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-20 14:40:40,670 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:40,670 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] [2024-11-20 14:40:40,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 14:40:40,874 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 [2024-11-20 14:40:40,874 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:40,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:40,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1240813253, now seen corresponding path program 1 times [2024-11-20 14:40:40,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:40,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949861288] [2024-11-20 14:40:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:40,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:41,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:41,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:41,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949861288] [2024-11-20 14:40:41,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949861288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:41,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484246068] [2024-11-20 14:40:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:41,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:41,317 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) [2024-11-20 14:40:41,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 14:40:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:41,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-20 14:40:41,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:41,456 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 [2024-11-20 14:40:41,505 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 [2024-11-20 14:40:41,549 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-20 14:40:41,549 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 [2024-11-20 14:40:41,574 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 [2024-11-20 14:40:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:41,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:41,687 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 [2024-11-20 14:40:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:41,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484246068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:40:41,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:40:41,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 19 [2024-11-20 14:40:41,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679264042] [2024-11-20 14:40:41,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:41,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 14:40:41,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:41,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 14:40:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-20 14:40:41,984 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 20 states, 19 states have (on average 4.842105263157895) internal successors, (92), 18 states have internal predecessors, (92), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-20 14:40:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:42,433 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2024-11-20 14:40:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 14:40:42,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.842105263157895) internal successors, (92), 18 states have internal predecessors, (92), 5 states have call successors, (5), 5 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 [2024-11-20 14:40:42,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:42,435 INFO L225 Difference]: With dead ends: 225 [2024-11-20 14:40:42,435 INFO L226 Difference]: Without dead ends: 225 [2024-11-20 14:40:42,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-11-20 14:40:42,436 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 100 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:42,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 906 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-20 14:40:42,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-20 14:40:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2024-11-20 14:40:42,444 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) [2024-11-20 14:40:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 265 transitions. [2024-11-20 14:40:42,444 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 265 transitions. Word has length 41 [2024-11-20 14:40:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:42,445 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 265 transitions. [2024-11-20 14:40:42,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.842105263157895) internal successors, (92), 18 states have internal predecessors, (92), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-20 14:40:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 265 transitions. [2024-11-20 14:40:42,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-20 14:40:42,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:42,445 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] [2024-11-20 14:40:42,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 14:40:42,646 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 [2024-11-20 14:40:42,646 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:42,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1836513292, now seen corresponding path program 1 times [2024-11-20 14:40:42,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:42,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862062078] [2024-11-20 14:40:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:42,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:43,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:43,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862062078] [2024-11-20 14:40:43,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862062078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970906855] [2024-11-20 14:40:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:43,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:43,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:43,167 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) [2024-11-20 14:40:43,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 14:40:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:43,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-20 14:40:43,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:43,303 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 [2024-11-20 14:40:43,310 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:40:43,311 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 [2024-11-20 14:40:43,314 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 [2024-11-20 14:40:43,318 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 [2024-11-20 14:40:43,325 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 [2024-11-20 14:40:43,328 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 [2024-11-20 14:40:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:43,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:43,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970906855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:43,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:40:43,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 19 [2024-11-20 14:40:43,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176863695] [2024-11-20 14:40:43,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:43,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 14:40:43,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:43,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 14:40:43,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=314, Unknown=10, NotChecked=0, Total=380 [2024-11-20 14:40:43,655 INFO L87 Difference]: Start difference. First operand 223 states and 265 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 15 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:40:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:44,093 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2024-11-20 14:40:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 14:40:44,094 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 15 states have internal predecessors, (53), 4 states have call successors, (4), 4 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 [2024-11-20 14:40:44,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:44,095 INFO L225 Difference]: With dead ends: 304 [2024-11-20 14:40:44,095 INFO L226 Difference]: Without dead ends: 304 [2024-11-20 14:40:44,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=616, Unknown=10, NotChecked=0, Total=756 [2024-11-20 14:40:44,095 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 223 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:44,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 805 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:40:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-20 14:40:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 235. [2024-11-20 14:40:44,099 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) [2024-11-20 14:40:44,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 279 transitions. [2024-11-20 14:40:44,100 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 279 transitions. Word has length 42 [2024-11-20 14:40:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:44,100 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 279 transitions. [2024-11-20 14:40:44,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 15 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:40:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 279 transitions. [2024-11-20 14:40:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-20 14:40:44,100 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:44,100 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] [2024-11-20 14:40:44,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 14:40:44,304 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 [2024-11-20 14:40:44,305 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:44,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:44,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1591414825, now seen corresponding path program 1 times [2024-11-20 14:40:44,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:44,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190544183] [2024-11-20 14:40:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:44,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:44,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:45,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190544183] [2024-11-20 14:40:45,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190544183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850643430] [2024-11-20 14:40:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:45,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:45,025 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) [2024-11-20 14:40:45,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 14:40:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:45,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-20 14:40:45,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:45,174 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 [2024-11-20 14:40:45,193 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:40:45,193 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 [2024-11-20 14:40:45,215 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 [2024-11-20 14:40:45,221 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 [2024-11-20 14:40:45,451 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 [2024-11-20 14:40:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:40:45,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:45,570 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~list2~0#1.offset| 4))) (and (forall ((v_ArrVal_1694 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_1694) |c_ULTIMATE.start_main_~list2~0#1.base|) .cse0) 0)) (forall ((v_ArrVal_1695 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_1695) |c_ULTIMATE.start_main_~list2~0#1.base|) .cse0) 0)))) is different from false [2024-11-20 14:40:45,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850643430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:45,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:40:45,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2024-11-20 14:40:45,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300315250] [2024-11-20 14:40:45,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:45,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 14:40:45,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:45,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 14:40:45,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=576, Unknown=1, NotChecked=48, Total=702 [2024-11-20 14:40:45,572 INFO L87 Difference]: Start difference. First operand 235 states and 279 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:40:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:46,135 INFO L93 Difference]: Finished difference Result 287 states and 341 transitions. [2024-11-20 14:40:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 14:40:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 4 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 44 [2024-11-20 14:40:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:46,136 INFO L225 Difference]: With dead ends: 287 [2024-11-20 14:40:46,136 INFO L226 Difference]: Without dead ends: 287 [2024-11-20 14:40:46,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=1023, Unknown=1, NotChecked=66, Total=1260 [2024-11-20 14:40:46,137 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 175 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:46,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 959 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-20 14:40:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-20 14:40:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 227. [2024-11-20 14:40:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 185 states have (on average 1.3297297297297297) internal successors, (246), 214 states have internal predecessors, (246), 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) [2024-11-20 14:40:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 264 transitions. [2024-11-20 14:40:46,142 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 264 transitions. Word has length 44 [2024-11-20 14:40:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:46,142 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 264 transitions. [2024-11-20 14:40:46,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-20 14:40:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 264 transitions. [2024-11-20 14:40:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-20 14:40:46,143 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:46,143 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] [2024-11-20 14:40:46,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 14:40:46,346 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 [2024-11-20 14:40:46,347 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)] === [2024-11-20 14:40:46,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:46,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1452710056, now seen corresponding path program 1 times [2024-11-20 14:40:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:46,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353166588] [2024-11-20 14:40:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:46,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:46,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:46,441 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-20 14:40:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-20 14:40:46,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:46,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353166588] [2024-11-20 14:40:46,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353166588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:46,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837925153] [2024-11-20 14:40:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:46,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:46,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:46,455 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) [2024-11-20 14:40:46,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 14:40:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:46,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-20 14:40:46,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-20 14:40:46,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-20 14:40:46,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837925153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:40:46,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:40:46,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2024-11-20 14:40:46,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515029273] [2024-11-20 14:40:46,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:46,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 14:40:46,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 14:40:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:40:46,637 INFO L87 Difference]: Start difference. First operand 227 states and 264 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-20 14:40:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:46,718 INFO L93 Difference]: Finished difference Result 273 states and 314 transitions. [2024-11-20 14:40:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:40:46,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 48 [2024-11-20 14:40:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:46,720 INFO L225 Difference]: With dead ends: 273 [2024-11-20 14:40:46,720 INFO L226 Difference]: Without dead ends: 273 [2024-11-20 14:40:46,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:40:46,724 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 60 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:46,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 339 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:40:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-11-20 14:40:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 263. [2024-11-20 14:40:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 217 states have (on average 1.327188940092166) internal successors, (288), 244 states have internal predecessors, (288), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-20 14:40:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 314 transitions. [2024-11-20 14:40:46,729 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 314 transitions. Word has length 48 [2024-11-20 14:40:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:46,729 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 314 transitions. [2024-11-20 14:40:46,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-20 14:40:46,729 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 314 transitions. [2024-11-20 14:40:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-20 14:40:46,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:46,730 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] [2024-11-20 14:40:46,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 14:40:46,930 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 [2024-11-20 14:40:46,931 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:46,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:46,931 INFO L85 PathProgramCache]: Analyzing trace with hash 948068346, now seen corresponding path program 1 times [2024-11-20 14:40:46,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:46,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136237273] [2024-11-20 14:40:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:46,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:47,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:47,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-20 14:40:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:40:47,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:47,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136237273] [2024-11-20 14:40:47,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136237273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:47,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41428295] [2024-11-20 14:40:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:47,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:47,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:47,621 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) [2024-11-20 14:40:47,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 14:40:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:47,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-20 14:40:47,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:47,812 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 [2024-11-20 14:40:47,815 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 [2024-11-20 14:40:47,894 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 [2024-11-20 14:40:47,896 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 [2024-11-20 14:40:47,965 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-20 14:40:47,965 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 [2024-11-20 14:40:47,968 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 [2024-11-20 14:40:48,013 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 [2024-11-20 14:40:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:40:48,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:48,301 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 [2024-11-20 14:40:48,314 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 [2024-11-20 14:40:48,316 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 [2024-11-20 14:40:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:40:48,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41428295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:40:48,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:40:48,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 24 [2024-11-20 14:40:48,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877568025] [2024-11-20 14:40:48,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:48,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 14:40:48,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:48,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 14:40:48,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-11-20 14:40:48,489 INFO L87 Difference]: Start difference. First operand 263 states and 314 transitions. Second operand has 25 states, 24 states have (on average 5.208333333333333) internal successors, (125), 23 states have internal predecessors, (125), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-20 14:40:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:49,279 INFO L93 Difference]: Finished difference Result 312 states and 358 transitions. [2024-11-20 14:40:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 14:40:49,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.208333333333333) internal successors, (125), 23 states have internal predecessors, (125), 6 states have call successors, (7), 5 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 [2024-11-20 14:40:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:49,280 INFO L225 Difference]: With dead ends: 312 [2024-11-20 14:40:49,280 INFO L226 Difference]: Without dead ends: 312 [2024-11-20 14:40:49,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2024-11-20 14:40:49,281 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 324 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:49,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 817 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-20 14:40:49,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-11-20 14:40:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 274. [2024-11-20 14:40:49,286 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) [2024-11-20 14:40:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 322 transitions. [2024-11-20 14:40:49,287 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 322 transitions. Word has length 60 [2024-11-20 14:40:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:49,287 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 322 transitions. [2024-11-20 14:40:49,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.208333333333333) internal successors, (125), 23 states have internal predecessors, (125), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-20 14:40:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 322 transitions. [2024-11-20 14:40:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-20 14:40:49,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:49,288 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] [2024-11-20 14:40:49,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 14:40:49,492 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 [2024-11-20 14:40:49,493 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:49,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash 948068345, now seen corresponding path program 1 times [2024-11-20 14:40:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:49,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974118430] [2024-11-20 14:40:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:49,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:49,868 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:49,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-20 14:40:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:40:50,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:50,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974118430] [2024-11-20 14:40:50,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974118430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:50,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102912756] [2024-11-20 14:40:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:50,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:50,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:50,004 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) [2024-11-20 14:40:50,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 14:40:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:50,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 14:40:50,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:50,177 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 [2024-11-20 14:40:50,219 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 [2024-11-20 14:40:50,263 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-20 14:40:50,263 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 [2024-11-20 14:40:50,288 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 [2024-11-20 14:40:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:40:50,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:50,395 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 [2024-11-20 14:40:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:40:50,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102912756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:40:50,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:40:50,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 21 [2024-11-20 14:40:50,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935576874] [2024-11-20 14:40:50,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:50,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 14:40:50,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:50,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 14:40:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2024-11-20 14:40:50,722 INFO L87 Difference]: Start difference. First operand 274 states and 322 transitions. Second operand has 22 states, 21 states have (on average 5.380952380952381) internal successors, (113), 20 states have internal predecessors, (113), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-20 14:40:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:51,218 INFO L93 Difference]: Finished difference Result 306 states and 356 transitions. [2024-11-20 14:40:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 14:40:51,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.380952380952381) internal successors, (113), 20 states have internal predecessors, (113), 6 states have call successors, (7), 5 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 [2024-11-20 14:40:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:51,220 INFO L225 Difference]: With dead ends: 306 [2024-11-20 14:40:51,220 INFO L226 Difference]: Without dead ends: 306 [2024-11-20 14:40:51,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2024-11-20 14:40:51,221 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 332 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:51,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 792 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-20 14:40:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-11-20 14:40:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 273. [2024-11-20 14:40:51,226 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) [2024-11-20 14:40:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 320 transitions. [2024-11-20 14:40:51,236 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 320 transitions. Word has length 60 [2024-11-20 14:40:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:51,236 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 320 transitions. [2024-11-20 14:40:51,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.380952380952381) internal successors, (113), 20 states have internal predecessors, (113), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-20 14:40:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 320 transitions. [2024-11-20 14:40:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-20 14:40:51,237 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:51,237 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] [2024-11-20 14:40:51,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 14:40:51,437 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 [2024-11-20 14:40:51,438 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:51,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:51,438 INFO L85 PathProgramCache]: Analyzing trace with hash 104187406, now seen corresponding path program 1 times [2024-11-20 14:40:51,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:51,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343821453] [2024-11-20 14:40:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:51,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:51,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:51,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-20 14:40:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:51,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-20 14:40:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-20 14:40:51,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:51,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343821453] [2024-11-20 14:40:51,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343821453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:51,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455949134] [2024-11-20 14:40:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:51,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:51,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:51,533 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) [2024-11-20 14:40:51,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 14:40:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:51,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-20 14:40:51,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-20 14:40:51,727 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 14:40:51,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455949134] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:40:51,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 14:40:51,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-11-20 14:40:51,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998925097] [2024-11-20 14:40:51,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:40:51,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:40:51,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:51,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:40:51,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:40:51,729 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) [2024-11-20 14:40:51,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:51,735 INFO L93 Difference]: Finished difference Result 267 states and 312 transitions. [2024-11-20 14:40:51,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:40:51,736 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 [2024-11-20 14:40:51,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:51,737 INFO L225 Difference]: With dead ends: 267 [2024-11-20 14:40:51,737 INFO L226 Difference]: Without dead ends: 267 [2024-11-20 14:40:51,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:40:51,737 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 [2024-11-20 14:40:51,738 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] [2024-11-20 14:40:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-20 14:40:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2024-11-20 14:40:51,743 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) [2024-11-20 14:40:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 312 transitions. [2024-11-20 14:40:51,744 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 312 transitions. Word has length 67 [2024-11-20 14:40:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:51,744 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 312 transitions. [2024-11-20 14:40:51,744 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) [2024-11-20 14:40:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 312 transitions. [2024-11-20 14:40:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-20 14:40:51,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:51,745 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] [2024-11-20 14:40:51,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 14:40:51,945 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 [2024-11-20 14:40:51,946 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:51,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:51,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1345239894, now seen corresponding path program 1 times [2024-11-20 14:40:51,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:51,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380573420] [2024-11-20 14:40:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:51,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:52,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:52,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-20 14:40:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:52,216 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-20 14:40:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:40:52,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:52,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380573420] [2024-11-20 14:40:52,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380573420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:52,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616357968] [2024-11-20 14:40:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:52,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:52,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:52,292 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) [2024-11-20 14:40:52,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 14:40:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:52,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 14:40:52,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:40:52,664 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 [2024-11-20 14:40:52,669 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:40:52,669 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 [2024-11-20 14:40:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:40:52,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:52,795 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 [2024-11-20 14:40:52,812 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-20 14:40:52,812 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 [2024-11-20 14:40:52,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:40:52,893 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 [2024-11-20 14:40:52,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:40:52,967 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 [2024-11-20 14:40:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:40:53,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616357968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:40:53,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:40:53,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-20 14:40:53,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012336561] [2024-11-20 14:40:53,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:53,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 14:40:53,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 14:40:53,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-20 14:40:53,058 INFO L87 Difference]: Start difference. First operand 267 states and 312 transitions. Second operand has 24 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 20 states have internal predecessors, (107), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-20 14:40:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:53,459 INFO L93 Difference]: Finished difference Result 287 states and 329 transitions. [2024-11-20 14:40:53,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 14:40:53,461 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 20 states have internal predecessors, (107), 5 states have call successors, (7), 5 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 [2024-11-20 14:40:53,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:53,462 INFO L225 Difference]: With dead ends: 287 [2024-11-20 14:40:53,462 INFO L226 Difference]: Without dead ends: 287 [2024-11-20 14:40:53,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2024-11-20 14:40:53,463 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 247 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:53,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 819 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:40:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-20 14:40:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 264. [2024-11-20 14:40:53,470 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) [2024-11-20 14:40:53,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 306 transitions. [2024-11-20 14:40:53,471 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 306 transitions. Word has length 72 [2024-11-20 14:40:53,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:53,471 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 306 transitions. [2024-11-20 14:40:53,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 20 states have internal predecessors, (107), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-20 14:40:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 306 transitions. [2024-11-20 14:40:53,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-20 14:40:53,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:53,472 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] [2024-11-20 14:40:53,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 14:40:53,672 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 [2024-11-20 14:40:53,673 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:53,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2134387814, now seen corresponding path program 1 times [2024-11-20 14:40:53,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:53,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433014297] [2024-11-20 14:40:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:53,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:53,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:54,040 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-20 14:40:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:54,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-20 14:40:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 14:40:54,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:54,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433014297] [2024-11-20 14:40:54,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433014297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:54,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434495070] [2024-11-20 14:40:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:54,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:54,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:54,210 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) [2024-11-20 14:40:54,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 14:40:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:54,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-20 14:40:54,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:54,460 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 [2024-11-20 14:40:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 14:40:54,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:54,693 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 [2024-11-20 14:40:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 14:40:54,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434495070] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:40:54,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:40:54,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 23 [2024-11-20 14:40:54,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845613067] [2024-11-20 14:40:54,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:54,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 14:40:54,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 14:40:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-20 14:40:54,753 INFO L87 Difference]: Start difference. First operand 264 states and 306 transitions. Second operand has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 20 states have internal predecessors, (109), 4 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-20 14:40:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:40:55,271 INFO L93 Difference]: Finished difference Result 279 states and 326 transitions. [2024-11-20 14:40:55,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-20 14:40:55,271 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 20 states have internal predecessors, (109), 4 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2024-11-20 14:40:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:40:55,272 INFO L225 Difference]: With dead ends: 279 [2024-11-20 14:40:55,272 INFO L226 Difference]: Without dead ends: 279 [2024-11-20 14:40:55,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2024-11-20 14:40:55,273 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 79 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:40:55,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1030 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:40:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-11-20 14:40:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 255. [2024-11-20 14:40:55,276 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) [2024-11-20 14:40:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 294 transitions. [2024-11-20 14:40:55,277 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 294 transitions. Word has length 73 [2024-11-20 14:40:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:40:55,277 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 294 transitions. [2024-11-20 14:40:55,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 20 states have internal predecessors, (109), 4 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-20 14:40:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 294 transitions. [2024-11-20 14:40:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-20 14:40:55,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:40:55,278 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] [2024-11-20 14:40:55,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-20 14:40:55,478 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 [2024-11-20 14:40:55,478 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:40:55,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:40:55,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1959490770, now seen corresponding path program 2 times [2024-11-20 14:40:55,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:40:55,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758896406] [2024-11-20 14:40:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:40:55,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:40:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:55,892 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:40:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:55,982 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-20 14:40:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:56,039 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-20 14:40:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:40:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-20 14:40:56,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:40:56,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758896406] [2024-11-20 14:40:56,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758896406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:56,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677378575] [2024-11-20 14:40:56,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:40:56,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:40:56,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:40:56,101 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) [2024-11-20 14:40:56,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 14:40:56,334 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:40:56,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:40:56,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-20 14:40:56,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:40:56,342 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 [2024-11-20 14:40:56,345 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 [2024-11-20 14:40:56,376 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 [2024-11-20 14:40:56,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:40:56,414 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 [2024-11-20 14:40:56,419 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:40:56,419 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 [2024-11-20 14:40:56,507 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 14:40:56,507 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 [2024-11-20 14:40:56,600 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-20 14:40:56,600 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 [2024-11-20 14:40:56,699 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-20 14:40:56,699 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 [2024-11-20 14:40:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 16 not checked. [2024-11-20 14:40:56,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:40:56,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677378575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:40:56,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:40:56,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2024-11-20 14:40:56,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160265553] [2024-11-20 14:40:56,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:40:56,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 14:40:56,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:40:56,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 14:40:56,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=321, Unknown=1, NotChecked=36, Total=420 [2024-11-20 14:40:56,946 INFO L87 Difference]: Start difference. First operand 255 states and 294 transitions. Second operand has 18 states, 17 states have (on average 5.411764705882353) internal successors, (92), 13 states have internal predecessors, (92), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-20 14:41:00,986 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] [2024-11-20 14:41:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:01,545 INFO L93 Difference]: Finished difference Result 292 states and 335 transitions. [2024-11-20 14:41:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 14:41:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.411764705882353) internal successors, (92), 13 states have internal predecessors, (92), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 75 [2024-11-20 14:41:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:01,546 INFO L225 Difference]: With dead ends: 292 [2024-11-20 14:41:01,547 INFO L226 Difference]: Without dead ends: 292 [2024-11-20 14:41:01,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=770, Unknown=1, NotChecked=58, Total=992 [2024-11-20 14:41:01,547 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 273 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:01,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 492 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 511 Invalid, 1 Unknown, 140 Unchecked, 4.3s Time] [2024-11-20 14:41:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-11-20 14:41:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 168. [2024-11-20 14:41:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 136 states have (on average 1.2794117647058822) internal successors, (174), 158 states have internal predecessors, (174), 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) [2024-11-20 14:41:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 186 transitions. [2024-11-20 14:41:01,551 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 186 transitions. Word has length 75 [2024-11-20 14:41:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:01,551 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 186 transitions. [2024-11-20 14:41:01,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.411764705882353) internal successors, (92), 13 states have internal predecessors, (92), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-20 14:41:01,551 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 186 transitions. [2024-11-20 14:41:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-20 14:41:01,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:01,552 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] [2024-11-20 14:41:01,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 14:41:01,752 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 [2024-11-20 14:41:01,753 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:41:01,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:01,753 INFO L85 PathProgramCache]: Analyzing trace with hash -850577046, now seen corresponding path program 2 times [2024-11-20 14:41:01,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:01,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825366186] [2024-11-20 14:41:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:01,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:02,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:41:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:02,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-20 14:41:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:02,085 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-20 14:41:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:02,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-20 14:41:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:02,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-20 14:41:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 44 proven. 65 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-20 14:41:02,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:02,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825366186] [2024-11-20 14:41:02,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825366186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:02,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956165268] [2024-11-20 14:41:02,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:41:02,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:02,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:02,201 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) [2024-11-20 14:41:02,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 14:41:02,644 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:41:02,644 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:41:02,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 14:41:02,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-20 14:41:02,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-20 14:41:02,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956165268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:41:02,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:41:02,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 19 [2024-11-20 14:41:02,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750008559] [2024-11-20 14:41:02,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:41:02,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 14:41:02,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:02,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 14:41:02,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-20 14:41:02,783 INFO L87 Difference]: Start difference. First operand 168 states and 186 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-20 14:41:03,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:03,144 INFO L93 Difference]: Finished difference Result 203 states and 211 transitions. [2024-11-20 14:41:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 14:41:03,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 102 [2024-11-20 14:41:03,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:03,146 INFO L225 Difference]: With dead ends: 203 [2024-11-20 14:41:03,146 INFO L226 Difference]: Without dead ends: 203 [2024-11-20 14:41:03,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 211 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2024-11-20 14:41:03,146 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 269 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:03,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 690 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:41:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-20 14:41:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 183. [2024-11-20 14:41:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 149 states have (on average 1.308724832214765) internal successors, (195), 171 states have internal predecessors, (195), 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) [2024-11-20 14:41:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 211 transitions. [2024-11-20 14:41:03,150 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 211 transitions. Word has length 102 [2024-11-20 14:41:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:03,150 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 211 transitions. [2024-11-20 14:41:03,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-20 14:41:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 211 transitions. [2024-11-20 14:41:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-20 14:41:03,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:03,151 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] [2024-11-20 14:41:03,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 14:41:03,351 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 [2024-11-20 14:41:03,351 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:41:03,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1160568942, now seen corresponding path program 1 times [2024-11-20 14:41:03,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:03,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213198824] [2024-11-20 14:41:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:03,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:41:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:03,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-20 14:41:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:03,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-20 14:41:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:04,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-20 14:41:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:04,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-20 14:41:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:04,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-11-20 14:41:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:04,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-20 14:41:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2024-11-20 14:41:04,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:04,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213198824] [2024-11-20 14:41:04,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213198824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:04,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33361020] [2024-11-20 14:41:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:04,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:04,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:04,144 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) [2024-11-20 14:41:04,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 14:41:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:04,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-20 14:41:04,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:04,621 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 [2024-11-20 14:41:04,650 INFO L349 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2024-11-20 14:41:04,650 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 [2024-11-20 14:41:04,791 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 [2024-11-20 14:41:04,802 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 22 treesize of output 10 [2024-11-20 14:41:04,820 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2024-11-20 14:41:04,820 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 24 treesize of output 28 [2024-11-20 14:41:04,912 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 [2024-11-20 14:41:04,937 INFO L349 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2024-11-20 14:41:04,937 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 23 treesize of output 28 [2024-11-20 14:41:05,103 INFO L349 Elim1Store]: treesize reduction 112, result has 34.1 percent of original size [2024-11-20 14:41:05,103 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 5 case distinctions, treesize of input 42 treesize of output 67 [2024-11-20 14:41:05,110 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 47 treesize of output 15 [2024-11-20 14:41:05,303 INFO L349 Elim1Store]: treesize reduction 48, result has 44.8 percent of original size [2024-11-20 14:41:05,303 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 57 treesize of output 71 [2024-11-20 14:41:05,305 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 63 treesize of output 26 [2024-11-20 14:41:05,560 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 48 treesize of output 30 [2024-11-20 14:41:05,581 INFO L349 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2024-11-20 14:41:05,582 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 31 treesize of output 52 [2024-11-20 14:41:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 47 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 24 not checked. [2024-11-20 14:41:05,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:05,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33361020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:05,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:41:05,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27] total 32 [2024-11-20 14:41:05,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867423632] [2024-11-20 14:41:05,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:41:05,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-20 14:41:05,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:05,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-20 14:41:05,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=946, Unknown=1, NotChecked=62, Total=1122 [2024-11-20 14:41:05,752 INFO L87 Difference]: Start difference. First operand 183 states and 211 transitions. Second operand has 33 states, 32 states have (on average 4.96875) internal successors, (159), 30 states have internal predecessors, (159), 7 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-20 14:41:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:06,503 INFO L93 Difference]: Finished difference Result 213 states and 236 transitions. [2024-11-20 14:41:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 14:41:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.96875) internal successors, (159), 30 states have internal predecessors, (159), 7 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 148 [2024-11-20 14:41:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:06,505 INFO L225 Difference]: With dead ends: 213 [2024-11-20 14:41:06,505 INFO L226 Difference]: Without dead ends: 213 [2024-11-20 14:41:06,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=286, Invalid=1879, Unknown=1, NotChecked=90, Total=2256 [2024-11-20 14:41:06,505 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 204 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:06,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 841 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 852 Invalid, 0 Unknown, 146 Unchecked, 0.5s Time] [2024-11-20 14:41:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-20 14:41:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 182. [2024-11-20 14:41:06,510 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) [2024-11-20 14:41:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 210 transitions. [2024-11-20 14:41:06,511 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 210 transitions. Word has length 148 [2024-11-20 14:41:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:06,511 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 210 transitions. [2024-11-20 14:41:06,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.96875) internal successors, (159), 30 states have internal predecessors, (159), 7 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-20 14:41:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 210 transitions. [2024-11-20 14:41:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-20 14:41:06,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:06,512 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] [2024-11-20 14:41:06,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-20 14:41:06,712 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 [2024-11-20 14:41:06,713 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:41:06,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:06,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1160568941, now seen corresponding path program 1 times [2024-11-20 14:41:06,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:06,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439620153] [2024-11-20 14:41:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:06,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:07,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:41:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:07,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-20 14:41:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:07,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-20 14:41:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:07,839 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-20 14:41:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:07,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-20 14:41:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:07,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-11-20 14:41:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:08,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-20 14:41:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-20 14:41:08,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:08,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439620153] [2024-11-20 14:41:08,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439620153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:08,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98205810] [2024-11-20 14:41:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:08,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:08,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:08,084 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) [2024-11-20 14:41:08,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 14:41:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:08,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-11-20 14:41:08,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:08,618 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 [2024-11-20 14:41:08,655 INFO L349 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2024-11-20 14:41:08,655 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 [2024-11-20 14:41:08,661 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 [2024-11-20 14:41:08,901 INFO L349 Elim1Store]: treesize reduction 78, result has 35.5 percent of original size [2024-11-20 14:41:08,902 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 63 [2024-11-20 14:41:08,905 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 [2024-11-20 14:41:08,914 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 [2024-11-20 14:41:09,102 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 [2024-11-20 14:41:09,117 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 [2024-11-20 14:41:09,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:41:09,120 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 [2024-11-20 14:41:09,131 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2024-11-20 14:41:09,132 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 [2024-11-20 14:41:09,226 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 [2024-11-20 14:41:09,228 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 [2024-11-20 14:41:09,256 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2024-11-20 14:41:09,256 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 [2024-11-20 14:41:09,580 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 54 treesize of output 23 [2024-11-20 14:41:09,585 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 [2024-11-20 14:41:09,594 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2024-11-20 14:41:09,594 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 23 [2024-11-20 14:41:09,938 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 35 treesize of output 23 [2024-11-20 14:41:09,941 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 [2024-11-20 14:41:09,964 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-20 14:41:09,965 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 23 treesize of output 37 [2024-11-20 14:41:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 59 proven. 235 refuted. 0 times theorem prover too weak. 2 trivial. 24 not checked. [2024-11-20 14:41:10,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:14,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98205810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:14,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:41:14,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 35] total 46 [2024-11-20 14:41:14,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409427640] [2024-11-20 14:41:14,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:41:14,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-20 14:41:14,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:14,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-20 14:41:14,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2044, Unknown=2, NotChecked=92, Total=2352 [2024-11-20 14:41:14,233 INFO L87 Difference]: Start difference. First operand 182 states and 210 transitions. Second operand has 47 states, 46 states have (on average 4.434782608695652) internal successors, (204), 42 states have internal predecessors, (204), 7 states have call successors, (10), 6 states have call predecessors, (10), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-20 14:41:18,262 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] [2024-11-20 14:41:22,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 14:41:26,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 14:41:30,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 14:41:34,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 14:41:39,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 14:41:43,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-20 14:41:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:43,824 INFO L93 Difference]: Finished difference Result 219 states and 251 transitions. [2024-11-20 14:41:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-20 14:41:43,825 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.434782608695652) internal successors, (204), 42 states have internal predecessors, (204), 7 states have call successors, (10), 6 states have call predecessors, (10), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 148 [2024-11-20 14:41:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:43,826 INFO L225 Difference]: With dead ends: 219 [2024-11-20 14:41:43,826 INFO L226 Difference]: Without dead ends: 219 [2024-11-20 14:41:43,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=523, Invalid=3901, Unknown=2, NotChecked=130, Total=4556 [2024-11-20 14:41:43,827 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 357 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 20 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:43,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 1197 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1129 Invalid, 7 Unknown, 157 Unchecked, 28.8s Time] [2024-11-20 14:41:43,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-20 14:41:43,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 181. [2024-11-20 14:41:43,830 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) [2024-11-20 14:41:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 209 transitions. [2024-11-20 14:41:43,831 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 209 transitions. Word has length 148 [2024-11-20 14:41:43,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:43,831 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 209 transitions. [2024-11-20 14:41:43,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.434782608695652) internal successors, (204), 42 states have internal predecessors, (204), 7 states have call successors, (10), 6 states have call predecessors, (10), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-20 14:41:43,831 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 209 transitions. [2024-11-20 14:41:43,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-20 14:41:43,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:43,832 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] [2024-11-20 14:41:43,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-20 14:41:44,032 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 [2024-11-20 14:41:44,033 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:41:44,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1384744403, now seen corresponding path program 1 times [2024-11-20 14:41:44,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:44,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599486111] [2024-11-20 14:41:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:44,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:45,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:41:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:45,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-20 14:41:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:45,488 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-20 14:41:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:45,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-20 14:41:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:45,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-20 14:41:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:45,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-11-20 14:41:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:45,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-20 14:41:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-20 14:41:45,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:45,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599486111] [2024-11-20 14:41:45,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599486111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:45,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163751423] [2024-11-20 14:41:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:45,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:45,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:45,761 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) [2024-11-20 14:41:45,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 14:41:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:46,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-11-20 14:41:46,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:46,152 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 [2024-11-20 14:41:46,162 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:41:46,162 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 [2024-11-20 14:41:46,176 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 [2024-11-20 14:41:46,213 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 [2024-11-20 14:41:46,221 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 [2024-11-20 14:41:46,421 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2024-11-20 14:41:46,458 INFO L349 Elim1Store]: treesize reduction 37, result has 42.2 percent of original size [2024-11-20 14:41:46,458 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 32 treesize of output 31 [2024-11-20 14:41:46,460 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 49 treesize of output 38 [2024-11-20 14:41:46,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:41:46,692 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 71 treesize of output 34 [2024-11-20 14:41:46,703 INFO L349 Elim1Store]: treesize reduction 37, result has 42.2 percent of original size [2024-11-20 14:41:46,703 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 42 treesize of output 41 [2024-11-20 14:41:46,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:41:46,863 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 77 treesize of output 40 [2024-11-20 14:41:46,887 INFO L349 Elim1Store]: treesize reduction 60, result has 48.7 percent of original size [2024-11-20 14:41:46,887 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 48 treesize of output 74 [2024-11-20 14:41:47,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:41:47,065 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 77 treesize of output 40 [2024-11-20 14:41:47,091 INFO L349 Elim1Store]: treesize reduction 56, result has 47.7 percent of original size [2024-11-20 14:41:47,091 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 44 treesize of output 66 [2024-11-20 14:41:47,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:41:47,282 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 77 treesize of output 40 [2024-11-20 14:41:47,307 INFO L349 Elim1Store]: treesize reduction 60, result has 48.7 percent of original size [2024-11-20 14:41:47,307 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 48 treesize of output 74 [2024-11-20 14:41:47,592 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 66 treesize of output 51 [2024-11-20 14:41:47,596 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 41 treesize of output 33 [2024-11-20 14:41:47,628 INFO L349 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2024-11-20 14:41:47,629 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 34 treesize of output 67 [2024-11-20 14:41:47,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:41:47,715 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 32 treesize of output 12 [2024-11-20 14:41:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 30 proven. 141 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-11-20 14:41:47,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:47,790 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6773 (Array Int Int)) (v_append_~node~0.base_141 Int)) (let ((.cse0 (store |c_#valid| v_append_~node~0.base_141 1))) (or (not (= (select .cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~list2~0#1.base|) (+ |c_ULTIMATE.start_main_~list2~0#1.offset| 4))) 1)) (= (select .cse0 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~list2~0#1.base| v_ArrVal_6773) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|)) 1)))) is different from false [2024-11-20 14:41:47,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163751423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:47,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:41:47,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25] total 35 [2024-11-20 14:41:47,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105708082] [2024-11-20 14:41:47,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-20 14:41:47,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-20 14:41:47,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:47,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-20 14:41:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1145, Unknown=1, NotChecked=68, Total=1332 [2024-11-20 14:41:47,793 INFO L87 Difference]: Start difference. First operand 181 states and 209 transitions. Second operand has 36 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 34 states have internal predecessors, (120), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-20 14:41:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:49,148 INFO L93 Difference]: Finished difference Result 274 states and 307 transitions. [2024-11-20 14:41:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-20 14:41:49,148 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 34 states have internal predecessors, (120), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 150 [2024-11-20 14:41:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:49,149 INFO L225 Difference]: With dead ends: 274 [2024-11-20 14:41:49,149 INFO L226 Difference]: Without dead ends: 274 [2024-11-20 14:41:49,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=445, Invalid=3340, Unknown=1, NotChecked=120, Total=3906 [2024-11-20 14:41:49,151 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 394 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:49,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 860 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-20 14:41:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-20 14:41:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 179. [2024-11-20 14:41:49,153 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) [2024-11-20 14:41:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 203 transitions. [2024-11-20 14:41:49,154 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 203 transitions. Word has length 150 [2024-11-20 14:41:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:49,154 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 203 transitions. [2024-11-20 14:41:49,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 34 states have internal predecessors, (120), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-20 14:41:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 203 transitions. [2024-11-20 14:41:49,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-20 14:41:49,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:49,156 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] [2024-11-20 14:41:49,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-20 14:41:49,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-20 14:41:49,357 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-20 14:41:49,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1384744404, now seen corresponding path program 1 times [2024-11-20 14:41:49,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:49,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998737044] [2024-11-20 14:41:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:49,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:51,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-20 14:41:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:51,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-20 14:41:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:51,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-20 14:41:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:51,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-20 14:41:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:51,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-20 14:41:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:51,800 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-11-20 14:41:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:51,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-20 14:41:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-20 14:41:52,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998737044] [2024-11-20 14:41:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998737044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092689995] [2024-11-20 14:41:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:52,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:52,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:52,102 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:41:52,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 14:41:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:52,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 216 conjuncts are in the unsatisfiable core [2024-11-20 14:41:52,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:52,554 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 [2024-11-20 14:41:52,587 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:41:52,587 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 [2024-11-20 14:41:52,627 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 [2024-11-20 14:41:52,630 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 [2024-11-20 14:41:52,686 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 [2024-11-20 14:41:52,690 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 [2024-11-20 14:41:52,725 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 [2024-11-20 14:41:52,729 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 [2024-11-20 14:41:53,089 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 20 [2024-11-20 14:41:53,164 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 [2024-11-20 14:41:53,182 INFO L349 Elim1Store]: treesize reduction 44, result has 33.3 percent of original size [2024-11-20 14:41:53,183 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 35 treesize of output 28 [2024-11-20 14:41:53,186 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 50 treesize of output 37 [2024-11-20 14:41:53,189 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 13 [2024-11-20 14:41:53,655 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2024-11-20 14:41:53,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 38 [2024-11-20 14:41:53,677 INFO L349 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2024-11-20 14:41:53,677 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 1 case distinctions, treesize of input 26 treesize of output 25 [2024-11-20 14:41:53,693 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-20 14:41:53,693 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 3 case distinctions, treesize of input 78 treesize of output 49 [2024-11-20 14:41:53,703 INFO L349 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2024-11-20 14:41:53,703 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 20 treesize of output 22 [2024-11-20 14:41:54,332 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:41:54,367 INFO L349 Elim1Store]: treesize reduction 117, result has 28.7 percent of original size [2024-11-20 14:41:54,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 68 [2024-11-20 14:41:54,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 58 [2024-11-20 14:41:54,393 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-20 14:41:54,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 31 treesize of output 21 [2024-11-20 14:41:54,411 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 [2024-11-20 14:41:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:41:54,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:41:54,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:41:54,923 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-20 14:41:54,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2024-11-20 14:41:54,934 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-20 14:41:54,934 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 4 case distinctions, treesize of input 99 treesize of output 54 [2024-11-20 14:41:54,957 INFO L349 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2024-11-20 14:41:54,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 52 [2024-11-20 14:41:54,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:41:54,974 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 [2024-11-20 14:41:55,398 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2024-11-20 14:41:55,399 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 4 case distinctions, treesize of input 37 treesize of output 35 [2024-11-20 14:41:55,441 INFO L349 Elim1Store]: treesize reduction 68, result has 46.9 percent of original size [2024-11-20 14:41:55,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 69 [2024-11-20 14:41:55,457 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-20 14:41:55,458 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 3 case distinctions, treesize of input 96 treesize of output 59 [2024-11-20 14:41:56,583 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 241 treesize of output 196