./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext2/length_test03-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext2/length_test03-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 07:46:39,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:46:39,690 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 07:46:39,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:46:39,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:46:39,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:46:39,722 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:46:39,722 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:46:39,723 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 07:46:39,724 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 07:46:39,725 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:46:39,725 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:46:39,725 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 07:46:39,727 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 07:46:39,727 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 07:46:39,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:46:39,727 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:46:39,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:46:39,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:46:39,728 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:46:39,728 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 07:46:39,729 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 07:46:39,729 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 07:46:39,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:46:39,731 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 07:46:39,731 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:46:39,731 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 07:46:39,731 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:46:39,732 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:46:39,732 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:46:39,732 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 07:46:39,732 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:46:39,732 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:46:39,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 07:46:39,732 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:46:39,733 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:46:39,733 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 07:46:39,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:46:39,734 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:46:39,734 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 07:46:39,734 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 07:46:39,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:46:39,735 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a [2024-11-09 07:46:39,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:46:39,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:46:39,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:46:39,976 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:46:39,976 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:46:39,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2024-11-09 07:46:41,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:46:41,374 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:46:41,374 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2024-11-09 07:46:41,382 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5651501e7/3f1a3d9155694a628477c146220642b1/FLAG5acb325a4 [2024-11-09 07:46:41,394 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5651501e7/3f1a3d9155694a628477c146220642b1 [2024-11-09 07:46:41,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:46:41,396 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:46:41,397 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:46:41,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:46:41,403 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:46:41,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,406 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@de09a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41, skipping insertion in model container [2024-11-09 07:46:41,406 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,434 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:46:41,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:46:41,683 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:46:41,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:46:41,747 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:46:41,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41 WrapperNode [2024-11-09 07:46:41,747 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:46:41,748 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:46:41,748 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:46:41,749 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:46:41,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,765 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,782 INFO L138 Inliner]: procedures = 123, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 101 [2024-11-09 07:46:41,782 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:46:41,783 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:46:41,783 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:46:41,783 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:46:41,794 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,802 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,821 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]. [2024-11-09 07:46:41,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,828 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,831 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,832 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:46:41,835 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:46:41,835 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:46:41,835 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:46:41,836 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (1/1) ... [2024-11-09 07:46:41,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 07:46:41,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:46:41,860 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) [2024-11-09 07:46:41,862 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 [2024-11-09 07:46:41,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 07:46:41,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 07:46:41,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 07:46:41,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 07:46:41,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 07:46:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:46:41,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:46:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure append [2024-11-09 07:46:41,903 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2024-11-09 07:46:42,042 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:46:42,044 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:46:42,311 INFO L? ?]: Removed 127 outVars from TransFormulas that were not future-live. [2024-11-09 07:46:42,311 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:46:42,323 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:46:42,323 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 07:46:42,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:46:42 BoogieIcfgContainer [2024-11-09 07:46:42,324 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:46:42,325 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:46:42,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:46:42,327 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:46:42,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:46:41" (1/3) ... [2024-11-09 07:46:42,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786f730e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:46:42, skipping insertion in model container [2024-11-09 07:46:42,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:46:41" (2/3) ... [2024-11-09 07:46:42,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786f730e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:46:42, skipping insertion in model container [2024-11-09 07:46:42,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:46:42" (3/3) ... [2024-11-09 07:46:42,329 INFO L112 eAbstractionObserver]: Analyzing ICFG length_test03-2.i [2024-11-09 07:46:42,341 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:46:42,341 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2024-11-09 07:46:42,373 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:46:42,378 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;@360b2725, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:46:42,378 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-09 07:46:42,381 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) [2024-11-09 07:46:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-09 07:46:42,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:42,385 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-09 07:46:42,385 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)] === [2024-11-09 07:46:42,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:42,390 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2024-11-09 07:46:42,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:42,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024120075] [2024-11-09 07:46:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:42,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024120075] [2024-11-09 07:46:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024120075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:42,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:42,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:46:42,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134508714] [2024-11-09 07:46:42,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:42,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:46:42,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:46:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:46:42,584 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) [2024-11-09 07:46:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:42,724 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2024-11-09 07:46:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:46:42,726 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 [2024-11-09 07:46:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:42,734 INFO L225 Difference]: With dead ends: 167 [2024-11-09 07:46:42,734 INFO L226 Difference]: Without dead ends: 165 [2024-11-09 07:46:42,736 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 [2024-11-09 07:46:42,738 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 [2024-11-09 07:46:42,739 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] [2024-11-09 07:46:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-09 07:46:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2024-11-09 07:46:42,777 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) [2024-11-09 07:46:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2024-11-09 07:46:42,781 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 3 [2024-11-09 07:46:42,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:42,781 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2024-11-09 07:46:42,782 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) [2024-11-09 07:46:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2024-11-09 07:46:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-09 07:46:42,783 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:42,783 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-09 07:46:42,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:46:42,783 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)] === [2024-11-09 07:46:42,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:42,785 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-11-09 07:46:42,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:42,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796670065] [2024-11-09 07:46:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:42,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:42,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:42,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796670065] [2024-11-09 07:46:42,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796670065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:42,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:42,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:46:42,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420794001] [2024-11-09 07:46:42,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:42,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:46:42,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:42,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:46:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:46:42,865 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) [2024-11-09 07:46:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:42,956 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2024-11-09 07:46:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:46:42,959 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 [2024-11-09 07:46:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:42,963 INFO L225 Difference]: With dead ends: 126 [2024-11-09 07:46:42,963 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 07:46:42,963 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 [2024-11-09 07:46:42,964 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:46:42,964 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] [2024-11-09 07:46:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 07:46:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2024-11-09 07:46:42,969 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) [2024-11-09 07:46:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2024-11-09 07:46:42,971 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 3 [2024-11-09 07:46:42,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:42,971 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2024-11-09 07:46:42,971 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) [2024-11-09 07:46:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2024-11-09 07:46:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 07:46:42,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:42,972 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 07:46:42,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:46:42,972 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)] === [2024-11-09 07:46:42,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash 889446152, now seen corresponding path program 1 times [2024-11-09 07:46:42,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:42,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241484453] [2024-11-09 07:46:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:43,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:43,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241484453] [2024-11-09 07:46:43,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241484453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:43,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:43,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:46:43,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342019916] [2024-11-09 07:46:43,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:43,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:46:43,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:43,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:46:43,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:46:43,044 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) [2024-11-09 07:46:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:43,124 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2024-11-09 07:46:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:46:43,127 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 [2024-11-09 07:46:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:43,128 INFO L225 Difference]: With dead ends: 140 [2024-11-09 07:46:43,128 INFO L226 Difference]: Without dead ends: 140 [2024-11-09 07:46:43,128 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 [2024-11-09 07:46:43,129 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 [2024-11-09 07:46:43,129 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] [2024-11-09 07:46:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-09 07:46:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 127. [2024-11-09 07:46:43,140 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) [2024-11-09 07:46:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2024-11-09 07:46:43,141 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 6 [2024-11-09 07:46:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:43,141 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2024-11-09 07:46:43,142 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) [2024-11-09 07:46:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2024-11-09 07:46:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 07:46:43,143 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:43,144 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 07:46:43,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 07:46:43,144 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)] === [2024-11-09 07:46:43,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:43,145 INFO L85 PathProgramCache]: Analyzing trace with hash 889446153, now seen corresponding path program 1 times [2024-11-09 07:46:43,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:43,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34932358] [2024-11-09 07:46:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:43,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:43,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:43,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34932358] [2024-11-09 07:46:43,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34932358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:43,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:43,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:46:43,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824029485] [2024-11-09 07:46:43,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:43,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:46:43,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:46:43,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:46:43,235 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) [2024-11-09 07:46:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:43,297 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2024-11-09 07:46:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:46:43,297 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 [2024-11-09 07:46:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:43,298 INFO L225 Difference]: With dead ends: 127 [2024-11-09 07:46:43,298 INFO L226 Difference]: Without dead ends: 127 [2024-11-09 07:46:43,298 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 [2024-11-09 07:46:43,299 INFO L432 NwaCegarLoop]: 124 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-11-09 07:46:43,300 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] [2024-11-09 07:46:43,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-09 07:46:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-11-09 07:46:43,305 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) [2024-11-09 07:46:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2024-11-09 07:46:43,306 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 6 [2024-11-09 07:46:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:43,306 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2024-11-09 07:46:43,306 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) [2024-11-09 07:46:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2024-11-09 07:46:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 07:46:43,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:43,307 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:46:43,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 07:46:43,307 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:43,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:43,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1036552302, now seen corresponding path program 1 times [2024-11-09 07:46:43,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:43,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698541712] [2024-11-09 07:46:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:43,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:43,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:43,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698541712] [2024-11-09 07:46:43,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698541712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:43,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:43,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:46:43,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118603985] [2024-11-09 07:46:43,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:43,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:46:43,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:43,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:46:43,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:46:43,400 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) [2024-11-09 07:46:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:43,461 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2024-11-09 07:46:43,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:46:43,462 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 [2024-11-09 07:46:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:43,463 INFO L225 Difference]: With dead ends: 120 [2024-11-09 07:46:43,463 INFO L226 Difference]: Without dead ends: 120 [2024-11-09 07:46:43,463 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 [2024-11-09 07:46:43,464 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 35 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-11-09 07:46:43,464 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] [2024-11-09 07:46:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-09 07:46:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-09 07:46:43,467 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) [2024-11-09 07:46:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2024-11-09 07:46:43,468 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 12 [2024-11-09 07:46:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:43,469 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2024-11-09 07:46:43,469 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) [2024-11-09 07:46:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2024-11-09 07:46:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 07:46:43,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:43,469 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:46:43,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 07:46:43,470 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:43,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:43,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1036552303, now seen corresponding path program 1 times [2024-11-09 07:46:43,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:43,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461644380] [2024-11-09 07:46:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:43,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:43,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:43,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461644380] [2024-11-09 07:46:43,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461644380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:43,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:43,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:46:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936129966] [2024-11-09 07:46:43,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:43,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:46:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:46:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:46:43,573 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) [2024-11-09 07:46:43,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:43,620 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2024-11-09 07:46:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:46:43,623 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 [2024-11-09 07:46:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:43,623 INFO L225 Difference]: With dead ends: 115 [2024-11-09 07:46:43,623 INFO L226 Difference]: Without dead ends: 115 [2024-11-09 07:46:43,624 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 [2024-11-09 07:46:43,624 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 [2024-11-09 07:46:43,624 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] [2024-11-09 07:46:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-09 07:46:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2024-11-09 07:46:43,631 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) [2024-11-09 07:46:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2024-11-09 07:46:43,631 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 12 [2024-11-09 07:46:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:43,631 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2024-11-09 07:46:43,632 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) [2024-11-09 07:46:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2024-11-09 07:46:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 07:46:43,632 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:43,632 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:46:43,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 07:46:43,632 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:43,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2068350391, now seen corresponding path program 1 times [2024-11-09 07:46:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:43,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235847298] [2024-11-09 07:46:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:43,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:43,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:43,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235847298] [2024-11-09 07:46:43,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235847298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:43,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:43,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:46:43,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158796667] [2024-11-09 07:46:43,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:43,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:46:43,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:43,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:46:43,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:46:43,830 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) [2024-11-09 07:46:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:44,020 INFO L93 Difference]: Finished difference Result 221 states and 242 transitions. [2024-11-09 07:46:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:46:44,020 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 [2024-11-09 07:46:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:44,021 INFO L225 Difference]: With dead ends: 221 [2024-11-09 07:46:44,021 INFO L226 Difference]: Without dead ends: 221 [2024-11-09 07:46:44,022 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 [2024-11-09 07:46:44,022 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 [2024-11-09 07:46:44,023 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] [2024-11-09 07:46:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-09 07:46:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 149. [2024-11-09 07:46:44,027 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) [2024-11-09 07:46:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 182 transitions. [2024-11-09 07:46:44,028 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 182 transitions. Word has length 13 [2024-11-09 07:46:44,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:44,028 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 182 transitions. [2024-11-09 07:46:44,029 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) [2024-11-09 07:46:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 182 transitions. [2024-11-09 07:46:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 07:46:44,029 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:44,029 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:46:44,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 07:46:44,030 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:44,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:44,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2068350392, now seen corresponding path program 1 times [2024-11-09 07:46:44,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:44,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353808066] [2024-11-09 07:46:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:44,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:44,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:44,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353808066] [2024-11-09 07:46:44,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353808066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:44,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:44,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:46:44,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785195207] [2024-11-09 07:46:44,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:44,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:46:44,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:44,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:46:44,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:46:44,210 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) [2024-11-09 07:46:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:44,361 INFO L93 Difference]: Finished difference Result 171 states and 207 transitions. [2024-11-09 07:46:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:46:44,362 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 [2024-11-09 07:46:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:44,363 INFO L225 Difference]: With dead ends: 171 [2024-11-09 07:46:44,363 INFO L226 Difference]: Without dead ends: 171 [2024-11-09 07:46:44,363 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 [2024-11-09 07:46:44,363 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 [2024-11-09 07:46:44,363 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] [2024-11-09 07:46:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-09 07:46:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-11-09 07:46:44,373 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) [2024-11-09 07:46:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 207 transitions. [2024-11-09 07:46:44,374 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 207 transitions. Word has length 13 [2024-11-09 07:46:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:44,374 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 207 transitions. [2024-11-09 07:46:44,374 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) [2024-11-09 07:46:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 207 transitions. [2024-11-09 07:46:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 07:46:44,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:44,375 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] [2024-11-09 07:46:44,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 07:46:44,375 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:44,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:44,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1480883050, now seen corresponding path program 1 times [2024-11-09 07:46:44,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:44,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748130072] [2024-11-09 07:46:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:44,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:44,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748130072] [2024-11-09 07:46:44,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748130072] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:44,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:44,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 07:46:44,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968754485] [2024-11-09 07:46:44,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:44,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:46:44,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:44,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:46:44,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:46:44,748 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) [2024-11-09 07:46:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:44,922 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2024-11-09 07:46:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:46:44,923 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 [2024-11-09 07:46:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:44,924 INFO L225 Difference]: With dead ends: 171 [2024-11-09 07:46:44,924 INFO L226 Difference]: Without dead ends: 171 [2024-11-09 07:46:44,924 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 [2024-11-09 07:46:44,924 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 [2024-11-09 07:46:44,925 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] [2024-11-09 07:46:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-09 07:46:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-11-09 07:46:44,930 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) [2024-11-09 07:46:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 206 transitions. [2024-11-09 07:46:44,931 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 206 transitions. Word has length 22 [2024-11-09 07:46:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:44,931 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 206 transitions. [2024-11-09 07:46:44,931 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) [2024-11-09 07:46:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 206 transitions. [2024-11-09 07:46:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 07:46:44,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:44,932 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] [2024-11-09 07:46:44,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 07:46:44,933 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:44,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash -439263795, now seen corresponding path program 1 times [2024-11-09 07:46:44,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:44,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564821119] [2024-11-09 07:46:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:44,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:45,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:45,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564821119] [2024-11-09 07:46:45,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564821119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:45,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:45,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-09 07:46:45,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546614214] [2024-11-09 07:46:45,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:45,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:46:45,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:46:45,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:46:45,249 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) [2024-11-09 07:46:45,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:45,480 INFO L93 Difference]: Finished difference Result 196 states and 231 transitions. [2024-11-09 07:46:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:46:45,480 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 [2024-11-09 07:46:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:45,481 INFO L225 Difference]: With dead ends: 196 [2024-11-09 07:46:45,481 INFO L226 Difference]: Without dead ends: 196 [2024-11-09 07:46:45,482 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 [2024-11-09 07:46:45,482 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 [2024-11-09 07:46:45,483 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] [2024-11-09 07:46:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-09 07:46:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 160. [2024-11-09 07:46:45,486 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) [2024-11-09 07:46:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 193 transitions. [2024-11-09 07:46:45,486 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 193 transitions. Word has length 24 [2024-11-09 07:46:45,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:45,486 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 193 transitions. [2024-11-09 07:46:45,486 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) [2024-11-09 07:46:45,486 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 193 transitions. [2024-11-09 07:46:45,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 07:46:45,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:45,487 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] [2024-11-09 07:46:45,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 07:46:45,489 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)] === [2024-11-09 07:46:45,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:45,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1442887251, now seen corresponding path program 1 times [2024-11-09 07:46:45,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:45,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301589904] [2024-11-09 07:46:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:45,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:45,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:46:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:45,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:45,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301589904] [2024-11-09 07:46:45,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301589904] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:46:45,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:46:45,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:46:45,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873243607] [2024-11-09 07:46:45,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:46:45,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:46:45,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:45,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:46:45,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:46:45,568 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) [2024-11-09 07:46:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:45,638 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2024-11-09 07:46:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:46:45,639 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 [2024-11-09 07:46:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:45,639 INFO L225 Difference]: With dead ends: 153 [2024-11-09 07:46:45,640 INFO L226 Difference]: Without dead ends: 153 [2024-11-09 07:46:45,640 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 [2024-11-09 07:46:45,640 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 [2024-11-09 07:46:45,641 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] [2024-11-09 07:46:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-09 07:46:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2024-11-09 07:46:45,644 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) [2024-11-09 07:46:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 156 transitions. [2024-11-09 07:46:45,645 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 156 transitions. Word has length 30 [2024-11-09 07:46:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:45,645 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 156 transitions. [2024-11-09 07:46:45,645 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) [2024-11-09 07:46:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 156 transitions. [2024-11-09 07:46:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 07:46:45,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:45,646 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] [2024-11-09 07:46:45,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 07:46:45,647 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:45,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash -610198618, now seen corresponding path program 1 times [2024-11-09 07:46:45,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:45,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875317730] [2024-11-09 07:46:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:45,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:45,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:46:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:46,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:46,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875317730] [2024-11-09 07:46:46,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875317730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:46,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169430002] [2024-11-09 07:46:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:46,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:46:46,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:46:46,010 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) [2024-11-09 07:46:46,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:46:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:46,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 07:46:46,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:46:46,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:46:46,352 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 [2024-11-09 07:46:46,364 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:46:46,365 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 [2024-11-09 07:46:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:46,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:46:46,618 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 [2024-11-09 07:46:46,637 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-09 07:46:46,638 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 [2024-11-09 07:46:46,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:46:46,761 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 [2024-11-09 07:46:46,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:46:46,858 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 [2024-11-09 07:46:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:46,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169430002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:46:46,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:46:46,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-09 07:46:46,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705540174] [2024-11-09 07:46:46,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:46:46,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 07:46:46,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:46,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 07:46:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-09 07:46:46,939 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) [2024-11-09 07:46:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:47,503 INFO L93 Difference]: Finished difference Result 173 states and 184 transitions. [2024-11-09 07:46:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 07:46:47,504 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 [2024-11-09 07:46:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:47,505 INFO L225 Difference]: With dead ends: 173 [2024-11-09 07:46:47,505 INFO L226 Difference]: Without dead ends: 173 [2024-11-09 07:46:47,505 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 [2024-11-09 07:46:47,506 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 [2024-11-09 07:46:47,506 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] [2024-11-09 07:46:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-09 07:46:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2024-11-09 07:46:47,509 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) [2024-11-09 07:46:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2024-11-09 07:46:47,509 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 32 [2024-11-09 07:46:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:47,509 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2024-11-09 07:46:47,510 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) [2024-11-09 07:46:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2024-11-09 07:46:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:46:47,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:47,510 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:46:47,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:46:47,711 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 [2024-11-09 07:46:47,711 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:47,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:47,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1027331565, now seen corresponding path program 1 times [2024-11-09 07:46:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:47,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261356245] [2024-11-09 07:46:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:47,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:47,863 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:46:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:47,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:47,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261356245] [2024-11-09 07:46:47,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261356245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:47,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499975602] [2024-11-09 07:46:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:47,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:46:47,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:46:47,934 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) [2024-11-09 07:46:47,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:46:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:48,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 07:46:48,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:46:48,039 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 [2024-11-09 07:46:48,057 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 [2024-11-09 07:46:48,105 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 07:46:48,105 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 [2024-11-09 07:46:48,122 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 07:46:48,122 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 [2024-11-09 07:46:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-09 07:46:48,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:46:48,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499975602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:48,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:46:48,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2024-11-09 07:46:48,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268798186] [2024-11-09 07:46:48,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:46:48,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:46:48,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:48,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:46:48,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2024-11-09 07:46:48,176 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) [2024-11-09 07:46:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:48,471 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2024-11-09 07:46:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:46:48,471 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 [2024-11-09 07:46:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:48,472 INFO L225 Difference]: With dead ends: 168 [2024-11-09 07:46:48,472 INFO L226 Difference]: Without dead ends: 168 [2024-11-09 07:46:48,473 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 [2024-11-09 07:46:48,473 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 [2024-11-09 07:46:48,473 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] [2024-11-09 07:46:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-09 07:46:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 141. [2024-11-09 07:46:48,476 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) [2024-11-09 07:46:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2024-11-09 07:46:48,477 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 33 [2024-11-09 07:46:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:48,477 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2024-11-09 07:46:48,477 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) [2024-11-09 07:46:48,477 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2024-11-09 07:46:48,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:46:48,478 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:48,478 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] [2024-11-09 07:46:48,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 07:46:48,681 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 [2024-11-09 07:46:48,682 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:48,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1027331566, now seen corresponding path program 1 times [2024-11-09 07:46:48,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:48,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655117492] [2024-11-09 07:46:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:48,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:48,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:46:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:48,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:48,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655117492] [2024-11-09 07:46:48,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655117492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:48,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191003857] [2024-11-09 07:46:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:48,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:46:48,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:46:48,961 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) [2024-11-09 07:46:48,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:46:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:49,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 07:46:49,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:46:49,080 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 [2024-11-09 07:46:49,083 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 [2024-11-09 07:46:49,128 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 [2024-11-09 07:46:49,226 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-09 07:46:49,227 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 [2024-11-09 07:46:49,231 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 [2024-11-09 07:46:49,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:46:49,352 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 [2024-11-09 07:46:49,362 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-09 07:46:49,363 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 [2024-11-09 07:46:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-09 07:46:49,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:46:49,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191003857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:49,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:46:49,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-11-09 07:46:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750509229] [2024-11-09 07:46:49,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:46:49,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 07:46:49,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 07:46:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=256, Unknown=1, NotChecked=32, Total=342 [2024-11-09 07:46:49,605 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) [2024-11-09 07:46:50,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:50,507 INFO L93 Difference]: Finished difference Result 305 states and 340 transitions. [2024-11-09 07:46:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:46:50,508 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 [2024-11-09 07:46:50,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:50,509 INFO L225 Difference]: With dead ends: 305 [2024-11-09 07:46:50,509 INFO L226 Difference]: Without dead ends: 305 [2024-11-09 07:46:50,509 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=764, Unknown=2, NotChecked=58, Total=992 [2024-11-09 07:46:50,510 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 [2024-11-09 07:46:50,510 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] [2024-11-09 07:46:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-09 07:46:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 217. [2024-11-09 07:46:50,515 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) [2024-11-09 07:46:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 262 transitions. [2024-11-09 07:46:50,516 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 262 transitions. Word has length 33 [2024-11-09 07:46:50,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:50,516 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 262 transitions. [2024-11-09 07:46:50,516 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) [2024-11-09 07:46:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 262 transitions. [2024-11-09 07:46:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:46:50,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:50,519 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] [2024-11-09 07:46:50,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:46:50,723 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 [2024-11-09 07:46:50,724 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:50,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1240813252, now seen corresponding path program 1 times [2024-11-09 07:46:50,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:50,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957813271] [2024-11-09 07:46:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:50,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:51,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:46:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:51,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:51,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957813271] [2024-11-09 07:46:51,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957813271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:51,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578579808] [2024-11-09 07:46:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:51,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:46:51,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:46:51,707 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) [2024-11-09 07:46:51,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:46:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:51,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 07:46:51,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:46:51,839 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 [2024-11-09 07:46:51,847 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 [2024-11-09 07:46:51,941 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 [2024-11-09 07:46:51,945 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 [2024-11-09 07:46:52,024 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-09 07:46:52,024 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 [2024-11-09 07:46:52,033 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 [2024-11-09 07:46:52,076 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 [2024-11-09 07:46:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:52,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:46:52,379 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 [2024-11-09 07:46:52,382 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 [2024-11-09 07:46:52,405 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 [2024-11-09 07:46:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:52,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578579808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:46:52,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:46:52,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 25 [2024-11-09 07:46:52,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103584208] [2024-11-09 07:46:52,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:46:52,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:46:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:46:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-11-09 07:46:52,622 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) [2024-11-09 07:46:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:53,235 INFO L93 Difference]: Finished difference Result 267 states and 322 transitions. [2024-11-09 07:46:53,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 07:46:53,236 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 [2024-11-09 07:46:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:53,237 INFO L225 Difference]: With dead ends: 267 [2024-11-09 07:46:53,237 INFO L226 Difference]: Without dead ends: 267 [2024-11-09 07:46:53,237 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 [2024-11-09 07:46:53,238 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 285 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2024-11-09 07:46:53,238 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] [2024-11-09 07:46:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-09 07:46:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 223. [2024-11-09 07:46:53,241 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) [2024-11-09 07:46:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2024-11-09 07:46:53,242 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 41 [2024-11-09 07:46:53,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:53,242 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2024-11-09 07:46:53,242 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) [2024-11-09 07:46:53,242 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2024-11-09 07:46:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:46:53,243 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:53,243 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] [2024-11-09 07:46:53,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 07:46:53,443 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 [2024-11-09 07:46:53,444 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:53,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1240813253, now seen corresponding path program 1 times [2024-11-09 07:46:53,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:53,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443799557] [2024-11-09 07:46:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:53,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:53,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:46:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:53,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:53,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443799557] [2024-11-09 07:46:53,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443799557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:53,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168976516] [2024-11-09 07:46:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:53,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:46:53,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:46:53,870 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) [2024-11-09 07:46:53,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:46:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:53,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 07:46:53,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:46:53,999 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 [2024-11-09 07:46:54,046 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 [2024-11-09 07:46:54,089 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-09 07:46:54,090 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 [2024-11-09 07:46:54,114 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 [2024-11-09 07:46:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:54,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:46:54,229 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 [2024-11-09 07:46:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:54,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168976516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:46:54,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:46:54,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 19 [2024-11-09 07:46:54,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392977453] [2024-11-09 07:46:54,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:46:54,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 07:46:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 07:46:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-09 07:46:54,546 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) [2024-11-09 07:46:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:54,981 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2024-11-09 07:46:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:46:54,983 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 [2024-11-09 07:46:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:54,983 INFO L225 Difference]: With dead ends: 225 [2024-11-09 07:46:54,983 INFO L226 Difference]: Without dead ends: 225 [2024-11-09 07:46:54,984 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-11-09 07:46:54,984 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 [2024-11-09 07:46:54,984 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] [2024-11-09 07:46:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-09 07:46:54,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2024-11-09 07:46:54,988 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) [2024-11-09 07:46:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 265 transitions. [2024-11-09 07:46:54,988 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 265 transitions. Word has length 41 [2024-11-09 07:46:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:54,989 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 265 transitions. [2024-11-09 07:46:54,989 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) [2024-11-09 07:46:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 265 transitions. [2024-11-09 07:46:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 07:46:54,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:54,989 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] [2024-11-09 07:46:55,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 07:46:55,193 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 [2024-11-09 07:46:55,194 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:55,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1836513292, now seen corresponding path program 1 times [2024-11-09 07:46:55,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:55,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453243151] [2024-11-09 07:46:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:55,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:55,589 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:46:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:55,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:55,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453243151] [2024-11-09 07:46:55,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453243151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:55,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623684244] [2024-11-09 07:46:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:55,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:46:55,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:46:55,731 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) [2024-11-09 07:46:55,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:46:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:55,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 07:46:55,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:46:55,869 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 [2024-11-09 07:46:55,877 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:46:55,877 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 [2024-11-09 07:46:55,881 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 [2024-11-09 07:46:55,884 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 [2024-11-09 07:46:55,891 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 [2024-11-09 07:46:55,894 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 [2024-11-09 07:46:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:56,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:46:56,194 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1486 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_1486) |c_ULTIMATE.start_main_~list2~0#1.base|) |c_ULTIMATE.start_main_~list2~0#1.offset|) 0)) (forall ((v_ArrVal_1487 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_1487) |c_ULTIMATE.start_main_~list2~0#1.base|) |c_ULTIMATE.start_main_~list2~0#1.offset|) 0))) is different from false [2024-11-09 07:46:56,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623684244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:56,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:46:56,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 19 [2024-11-09 07:46:56,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441527337] [2024-11-09 07:46:56,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:46:56,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 07:46:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:56,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 07:46:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=292, Unknown=1, NotChecked=34, Total=380 [2024-11-09 07:46:56,197 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) [2024-11-09 07:46:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:56,630 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2024-11-09 07:46:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 07:46:56,630 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 [2024-11-09 07:46:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:56,632 INFO L225 Difference]: With dead ends: 304 [2024-11-09 07:46:56,632 INFO L226 Difference]: Without dead ends: 304 [2024-11-09 07:46:56,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=580, Unknown=1, NotChecked=50, Total=756 [2024-11-09 07:46:56,632 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 [2024-11-09 07:46:56,632 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] [2024-11-09 07:46:56,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-09 07:46:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 235. [2024-11-09 07:46:56,637 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) [2024-11-09 07:46:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 279 transitions. [2024-11-09 07:46:56,638 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 279 transitions. Word has length 42 [2024-11-09 07:46:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:56,639 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 279 transitions. [2024-11-09 07:46:56,639 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) [2024-11-09 07:46:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 279 transitions. [2024-11-09 07:46:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 07:46:56,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:56,640 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] [2024-11-09 07:46:56,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:46:56,844 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 [2024-11-09 07:46:56,845 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:46:56,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1591414825, now seen corresponding path program 1 times [2024-11-09 07:46:56,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:56,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462748490] [2024-11-09 07:46:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:56,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:57,472 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:46:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:57,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:57,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462748490] [2024-11-09 07:46:57,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462748490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:57,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110966873] [2024-11-09 07:46:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:57,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:46:57,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:46:57,616 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) [2024-11-09 07:46:57,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:46:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:57,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 07:46:57,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:46:57,758 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 [2024-11-09 07:46:57,775 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:46:57,776 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 [2024-11-09 07:46:57,789 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 [2024-11-09 07:46:57,793 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 [2024-11-09 07:46:58,013 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 9 treesize of output 3 [2024-11-09 07:46:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:46:58,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:46:58,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110966873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:58,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:46:58,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2024-11-09 07:46:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726094904] [2024-11-09 07:46:58,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:46:58,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 07:46:58,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 07:46:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=613, Unknown=10, NotChecked=0, Total=702 [2024-11-09 07:46:58,907 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) [2024-11-09 07:46:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:59,439 INFO L93 Difference]: Finished difference Result 287 states and 341 transitions. [2024-11-09 07:46:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:46:59,439 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 [2024-11-09 07:46:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:59,440 INFO L225 Difference]: With dead ends: 287 [2024-11-09 07:46:59,440 INFO L226 Difference]: Without dead ends: 287 [2024-11-09 07:46:59,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=173, Invalid=1077, Unknown=10, NotChecked=0, Total=1260 [2024-11-09 07:46:59,441 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 [2024-11-09 07:46:59,441 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] [2024-11-09 07:46:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-09 07:46:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 227. [2024-11-09 07:46:59,447 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) [2024-11-09 07:46:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 264 transitions. [2024-11-09 07:46:59,448 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 264 transitions. Word has length 44 [2024-11-09 07:46:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:59,448 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 264 transitions. [2024-11-09 07:46:59,448 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) [2024-11-09 07:46:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 264 transitions. [2024-11-09 07:46:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 07:46:59,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:59,449 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] [2024-11-09 07:46:59,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 07:46:59,653 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 [2024-11-09 07:46:59,654 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)] === [2024-11-09 07:46:59,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:59,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1452710056, now seen corresponding path program 1 times [2024-11-09 07:46:59,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:59,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455946616] [2024-11-09 07:46:59,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:59,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:59,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:46:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:59,728 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:46:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 07:46:59,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455946616] [2024-11-09 07:46:59,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455946616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:59,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141629702] [2024-11-09 07:46:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:59,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:46:59,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:46:59,757 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) [2024-11-09 07:46:59,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:46:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:59,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:46:59,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:46:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 07:46:59,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:46:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 07:46:59,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141629702] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:46:59,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:46:59,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2024-11-09 07:46:59,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321243830] [2024-11-09 07:46:59,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:46:59,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:46:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:46:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-09 07:46:59,957 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) [2024-11-09 07:47:00,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:00,043 INFO L93 Difference]: Finished difference Result 273 states and 314 transitions. [2024-11-09 07:47:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:47:00,044 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 [2024-11-09 07:47:00,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:00,045 INFO L225 Difference]: With dead ends: 273 [2024-11-09 07:47:00,045 INFO L226 Difference]: Without dead ends: 273 [2024-11-09 07:47:00,045 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 [2024-11-09 07:47:00,046 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 [2024-11-09 07:47:00,046 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] [2024-11-09 07:47:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-11-09 07:47:00,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 263. [2024-11-09 07:47:00,055 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) [2024-11-09 07:47:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 314 transitions. [2024-11-09 07:47:00,056 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 314 transitions. Word has length 48 [2024-11-09 07:47:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:00,056 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 314 transitions. [2024-11-09 07:47:00,056 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) [2024-11-09 07:47:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 314 transitions. [2024-11-09 07:47:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 07:47:00,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:00,057 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] [2024-11-09 07:47:00,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:47:00,257 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 [2024-11-09 07:47:00,258 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:47:00,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:00,258 INFO L85 PathProgramCache]: Analyzing trace with hash 948068346, now seen corresponding path program 1 times [2024-11-09 07:47:00,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:00,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822796956] [2024-11-09 07:47:00,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:00,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:00,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:47:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:47:00,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:00,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822796956] [2024-11-09 07:47:00,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822796956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:00,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929054957] [2024-11-09 07:47:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:00,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:00,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:01,000 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) [2024-11-09 07:47:01,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:47:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:01,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 07:47:01,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:01,192 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 [2024-11-09 07:47:01,195 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 [2024-11-09 07:47:01,275 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 [2024-11-09 07:47:01,279 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 [2024-11-09 07:47:01,358 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-09 07:47:01,358 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 [2024-11-09 07:47:01,360 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 [2024-11-09 07:47:01,399 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 [2024-11-09 07:47:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:47:01,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:47:01,704 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 [2024-11-09 07:47:01,714 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 [2024-11-09 07:47:01,716 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 [2024-11-09 07:47:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:47:01,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929054957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:47:01,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:47:01,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 24 [2024-11-09 07:47:01,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494635684] [2024-11-09 07:47:01,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:47:01,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 07:47:01,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 07:47:01,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-11-09 07:47:01,912 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) [2024-11-09 07:47:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:02,660 INFO L93 Difference]: Finished difference Result 312 states and 358 transitions. [2024-11-09 07:47:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 07:47:02,660 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 [2024-11-09 07:47:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:02,661 INFO L225 Difference]: With dead ends: 312 [2024-11-09 07:47:02,661 INFO L226 Difference]: Without dead ends: 312 [2024-11-09 07:47:02,662 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 [2024-11-09 07:47:02,662 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 [2024-11-09 07:47:02,662 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] [2024-11-09 07:47:02,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-11-09 07:47:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 274. [2024-11-09 07:47:02,666 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) [2024-11-09 07:47:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 322 transitions. [2024-11-09 07:47:02,667 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 322 transitions. Word has length 60 [2024-11-09 07:47:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:02,667 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 322 transitions. [2024-11-09 07:47:02,667 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) [2024-11-09 07:47:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 322 transitions. [2024-11-09 07:47:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 07:47:02,668 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:02,668 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] [2024-11-09 07:47:02,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 07:47:02,868 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 [2024-11-09 07:47:02,869 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:47:02,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:02,869 INFO L85 PathProgramCache]: Analyzing trace with hash 948068345, now seen corresponding path program 1 times [2024-11-09 07:47:02,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:02,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913623826] [2024-11-09 07:47:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:02,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:03,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:03,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:47:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:47:03,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:03,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913623826] [2024-11-09 07:47:03,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913623826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:03,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702976212] [2024-11-09 07:47:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:03,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:03,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:03,369 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) [2024-11-09 07:47:03,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:47:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:03,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 07:47:03,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:03,560 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 [2024-11-09 07:47:03,603 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 [2024-11-09 07:47:03,638 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-09 07:47:03,638 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 [2024-11-09 07:47:03,667 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 [2024-11-09 07:47:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:47:03,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:47:03,782 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 [2024-11-09 07:47:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:47:04,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702976212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:47:04,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:47:04,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 21 [2024-11-09 07:47:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380987929] [2024-11-09 07:47:04,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:47:04,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 07:47:04,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 07:47:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2024-11-09 07:47:04,082 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) [2024-11-09 07:47:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:04,562 INFO L93 Difference]: Finished difference Result 306 states and 356 transitions. [2024-11-09 07:47:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:47:04,562 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 [2024-11-09 07:47:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:04,563 INFO L225 Difference]: With dead ends: 306 [2024-11-09 07:47:04,563 INFO L226 Difference]: Without dead ends: 306 [2024-11-09 07:47:04,564 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 [2024-11-09 07:47:04,564 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 [2024-11-09 07:47:04,564 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] [2024-11-09 07:47:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-11-09 07:47:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 273. [2024-11-09 07:47:04,570 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) [2024-11-09 07:47:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 320 transitions. [2024-11-09 07:47:04,571 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 320 transitions. Word has length 60 [2024-11-09 07:47:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:04,572 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 320 transitions. [2024-11-09 07:47:04,572 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) [2024-11-09 07:47:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 320 transitions. [2024-11-09 07:47:04,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 07:47:04,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:04,573 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] [2024-11-09 07:47:04,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 07:47:04,773 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 [2024-11-09 07:47:04,773 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:47:04,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:04,774 INFO L85 PathProgramCache]: Analyzing trace with hash 104187406, now seen corresponding path program 1 times [2024-11-09 07:47:04,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:04,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747585426] [2024-11-09 07:47:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:04,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:04,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:04,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-09 07:47:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:04,843 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-09 07:47:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 07:47:04,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:04,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747585426] [2024-11-09 07:47:04,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747585426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:04,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099664244] [2024-11-09 07:47:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:04,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:04,854 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) [2024-11-09 07:47:04,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:47:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:05,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:47:05,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 07:47:05,045 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:47:05,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099664244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:47:05,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:47:05,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-11-09 07:47:05,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519623280] [2024-11-09 07:47:05,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:47:05,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:47:05,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:05,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:47:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:47:05,046 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) [2024-11-09 07:47:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:05,053 INFO L93 Difference]: Finished difference Result 267 states and 312 transitions. [2024-11-09 07:47:05,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:47:05,055 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 [2024-11-09 07:47:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:05,056 INFO L225 Difference]: With dead ends: 267 [2024-11-09 07:47:05,056 INFO L226 Difference]: Without dead ends: 267 [2024-11-09 07:47:05,056 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 [2024-11-09 07:47:05,057 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 [2024-11-09 07:47:05,057 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] [2024-11-09 07:47:05,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-09 07:47:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2024-11-09 07:47:05,064 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) [2024-11-09 07:47:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 312 transitions. [2024-11-09 07:47:05,065 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 312 transitions. Word has length 67 [2024-11-09 07:47:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:05,065 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 312 transitions. [2024-11-09 07:47:05,065 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) [2024-11-09 07:47:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 312 transitions. [2024-11-09 07:47:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 07:47:05,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:05,066 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] [2024-11-09 07:47:05,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 07:47:05,266 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 [2024-11-09 07:47:05,266 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:47:05,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:05,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1345239894, now seen corresponding path program 1 times [2024-11-09 07:47:05,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:05,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316869846] [2024-11-09 07:47:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:05,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:05,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:05,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-09 07:47:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:05,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-09 07:47:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 07:47:05,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:05,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316869846] [2024-11-09 07:47:05,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316869846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:05,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739793388] [2024-11-09 07:47:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:05,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:05,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:05,624 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) [2024-11-09 07:47:05,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:47:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:05,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 07:47:05,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:05,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:47:05,983 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 [2024-11-09 07:47:05,990 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:47:05,991 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 [2024-11-09 07:47:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 07:47:06,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:47:06,154 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 [2024-11-09 07:47:06,174 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-09 07:47:06,174 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 [2024-11-09 07:47:06,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:47:06,255 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 [2024-11-09 07:47:06,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:47:06,343 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 [2024-11-09 07:47:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 07:47:06,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739793388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:47:06,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:47:06,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-09 07:47:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211693329] [2024-11-09 07:47:06,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:47:06,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 07:47:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:06,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 07:47:06,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-09 07:47:06,448 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) [2024-11-09 07:47:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:06,892 INFO L93 Difference]: Finished difference Result 287 states and 329 transitions. [2024-11-09 07:47:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:47:06,893 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 [2024-11-09 07:47:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:06,894 INFO L225 Difference]: With dead ends: 287 [2024-11-09 07:47:06,894 INFO L226 Difference]: Without dead ends: 287 [2024-11-09 07:47:06,894 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 [2024-11-09 07:47:06,894 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, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:47:06,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 819 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:47:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-09 07:47:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 264. [2024-11-09 07:47:06,898 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) [2024-11-09 07:47:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 306 transitions. [2024-11-09 07:47:06,899 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 306 transitions. Word has length 72 [2024-11-09 07:47:06,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:06,899 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 306 transitions. [2024-11-09 07:47:06,899 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) [2024-11-09 07:47:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 306 transitions. [2024-11-09 07:47:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 07:47:06,900 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:06,900 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] [2024-11-09 07:47:06,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 07:47:07,103 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 [2024-11-09 07:47:07,104 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:47:07,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2134387814, now seen corresponding path program 1 times [2024-11-09 07:47:07,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:07,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90652420] [2024-11-09 07:47:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:07,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:07,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:07,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-09 07:47:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:07,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-09 07:47:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:47:07,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:07,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90652420] [2024-11-09 07:47:07,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90652420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:07,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110138638] [2024-11-09 07:47:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:07,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:07,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:07,653 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) [2024-11-09 07:47:07,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 07:47:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:07,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 07:47:07,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:07,957 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 [2024-11-09 07:47:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:47:08,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:47:08,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2024-11-09 07:47:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:47:08,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110138638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:47:08,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:47:08,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 23 [2024-11-09 07:47:08,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317843870] [2024-11-09 07:47:08,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:47:08,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 07:47:08,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 07:47:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-09 07:47:08,244 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) [2024-11-09 07:47:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:08,671 INFO L93 Difference]: Finished difference Result 279 states and 326 transitions. [2024-11-09 07:47:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 07:47:08,671 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 [2024-11-09 07:47:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:08,672 INFO L225 Difference]: With dead ends: 279 [2024-11-09 07:47:08,672 INFO L226 Difference]: Without dead ends: 279 [2024-11-09 07:47:08,673 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 07:47:08,673 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 [2024-11-09 07:47:08,673 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] [2024-11-09 07:47:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-11-09 07:47:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 255. [2024-11-09 07:47:08,677 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) [2024-11-09 07:47:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 294 transitions. [2024-11-09 07:47:08,678 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 294 transitions. Word has length 73 [2024-11-09 07:47:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:08,678 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 294 transitions. [2024-11-09 07:47:08,678 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) [2024-11-09 07:47:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 294 transitions. [2024-11-09 07:47:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 07:47:08,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:08,679 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] [2024-11-09 07:47:08,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 07:47:08,879 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 [2024-11-09 07:47:08,879 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:47:08,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:08,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1959490770, now seen corresponding path program 2 times [2024-11-09 07:47:08,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:08,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678946123] [2024-11-09 07:47:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:08,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:09,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:09,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-09 07:47:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:09,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-09 07:47:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 07:47:09,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:09,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678946123] [2024-11-09 07:47:09,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678946123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:09,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378166787] [2024-11-09 07:47:09,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 07:47:09,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:09,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:09,486 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) [2024-11-09 07:47:09,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 07:47:09,735 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 07:47:09,736 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:47:09,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-09 07:47:09,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:09,759 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 [2024-11-09 07:47:09,763 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 [2024-11-09 07:47:09,905 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 [2024-11-09 07:47:09,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:47:09,974 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 [2024-11-09 07:47:09,988 INFO L349 Elim1Store]: treesize reduction 38, result has 29.6 percent of original size [2024-11-09 07:47:09,989 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 37 treesize of output 22 [2024-11-09 07:47:10,215 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:47:10,216 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 30 treesize of output 20 [2024-11-09 07:47:10,225 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-09 07:47:10,225 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 [2024-11-09 07:47:10,231 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 [2024-11-09 07:47:10,405 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 8 treesize of output 4 [2024-11-09 07:47:10,412 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 07:47:10,412 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 [2024-11-09 07:47:10,488 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-09 07:47:10,489 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 [2024-11-09 07:47:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:47:10,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:47:10,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378166787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:10,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:47:10,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19] total 27 [2024-11-09 07:47:10,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658670129] [2024-11-09 07:47:10,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:47:10,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 07:47:10,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:10,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 07:47:10,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2024-11-09 07:47:10,786 INFO L87 Difference]: Start difference. First operand 255 states and 294 transitions. Second operand has 28 states, 27 states have (on average 4.185185185185185) internal successors, (113), 21 states have internal predecessors, (113), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 07:47:14,847 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] [2024-11-09 07:47:18,944 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] [2024-11-09 07:47:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:19,831 INFO L93 Difference]: Finished difference Result 292 states and 335 transitions. [2024-11-09 07:47:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 07:47:19,831 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.185185185185185) internal successors, (113), 21 states have internal predecessors, (113), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 75 [2024-11-09 07:47:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:19,832 INFO L225 Difference]: With dead ends: 292 [2024-11-09 07:47:19,832 INFO L226 Difference]: Without dead ends: 292 [2024-11-09 07:47:19,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=2238, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 07:47:19,833 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 341 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:47:19,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 796 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 963 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2024-11-09 07:47:19,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-11-09 07:47:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 168. [2024-11-09 07:47:19,836 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) [2024-11-09 07:47:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 186 transitions. [2024-11-09 07:47:19,837 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 186 transitions. Word has length 75 [2024-11-09 07:47:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:19,837 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 186 transitions. [2024-11-09 07:47:19,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.185185185185185) internal successors, (113), 21 states have internal predecessors, (113), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 07:47:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 186 transitions. [2024-11-09 07:47:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 07:47:19,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:19,838 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] [2024-11-09 07:47:19,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 07:47:20,038 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 [2024-11-09 07:47:20,039 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)] === [2024-11-09 07:47:20,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash -850577046, now seen corresponding path program 2 times [2024-11-09 07:47:20,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:20,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709776449] [2024-11-09 07:47:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:20,302 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:20,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:47:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:20,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:47:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:20,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-09 07:47:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:20,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-09 07:47:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 44 proven. 65 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-09 07:47:20,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709776449] [2024-11-09 07:47:20,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709776449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907987774] [2024-11-09 07:47:20,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 07:47:20,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:20,487 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) [2024-11-09 07:47:20,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 07:47:20,912 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 07:47:20,912 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:47:20,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:47:20,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-09 07:47:20,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:47:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-09 07:47:21,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907987774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:47:21,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:47:21,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 19 [2024-11-09 07:47:21,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475437605] [2024-11-09 07:47:21,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:47:21,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 07:47:21,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 07:47:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-09 07:47:21,043 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) [2024-11-09 07:47:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:21,422 INFO L93 Difference]: Finished difference Result 203 states and 211 transitions. [2024-11-09 07:47:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 07:47:21,422 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 [2024-11-09 07:47:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:21,423 INFO L225 Difference]: With dead ends: 203 [2024-11-09 07:47:21,423 INFO L226 Difference]: Without dead ends: 203 [2024-11-09 07:47:21,423 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 [2024-11-09 07:47:21,424 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 270 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:47:21,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 812 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:47:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-09 07:47:21,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 183. [2024-11-09 07:47:21,427 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) [2024-11-09 07:47:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 211 transitions. [2024-11-09 07:47:21,427 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 211 transitions. Word has length 102 [2024-11-09 07:47:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:21,427 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 211 transitions. [2024-11-09 07:47:21,428 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) [2024-11-09 07:47:21,428 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 211 transitions. [2024-11-09 07:47:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-09 07:47:21,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:21,429 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] [2024-11-09 07:47:21,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 07:47:21,630 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 [2024-11-09 07:47:21,630 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)] === [2024-11-09 07:47:21,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1160568942, now seen corresponding path program 1 times [2024-11-09 07:47:21,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:21,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862505978] [2024-11-09 07:47:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:21,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:22,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:22,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:47:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:22,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:47:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:22,482 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-09 07:47:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:22,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-09 07:47:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:22,551 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-11-09 07:47:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:22,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-09 07:47:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2024-11-09 07:47:22,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:22,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862505978] [2024-11-09 07:47:22,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862505978] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:22,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691996246] [2024-11-09 07:47:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:22,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:22,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:22,618 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) [2024-11-09 07:47:22,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 07:47:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:22,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-09 07:47:22,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:23,054 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 [2024-11-09 07:47:23,077 INFO L349 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2024-11-09 07:47:23,078 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 [2024-11-09 07:47:23,205 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 [2024-11-09 07:47:23,217 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 [2024-11-09 07:47:23,234 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2024-11-09 07:47:23,234 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 [2024-11-09 07:47:23,318 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 [2024-11-09 07:47:23,347 INFO L349 Elim1Store]: treesize reduction 48, result has 39.2 percent of original size [2024-11-09 07:47:23,348 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 31 treesize of output 37 [2024-11-09 07:47:23,578 INFO L349 Elim1Store]: treesize reduction 48, result has 44.8 percent of original size [2024-11-09 07:47:23,578 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 [2024-11-09 07:47:23,585 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 63 treesize of output 26 [2024-11-09 07:47:23,794 INFO L349 Elim1Store]: treesize reduction 48, result has 44.8 percent of original size [2024-11-09 07:47:23,795 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 [2024-11-09 07:47:23,798 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 [2024-11-09 07:47:23,992 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 [2024-11-09 07:47:24,011 INFO L349 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2024-11-09 07:47:24,011 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 [2024-11-09 07:47:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 69 proven. 190 refuted. 0 times theorem prover too weak. 37 trivial. 24 not checked. [2024-11-09 07:47:24,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:47:24,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691996246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:24,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:47:24,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25] total 29 [2024-11-09 07:47:24,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220671325] [2024-11-09 07:47:24,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:47:24,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 07:47:24,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:24,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 07:47:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=766, Unknown=1, NotChecked=56, Total=930 [2024-11-09 07:47:24,155 INFO L87 Difference]: Start difference. First operand 183 states and 211 transitions. Second operand has 30 states, 29 states have (on average 5.068965517241379) internal successors, (147), 27 states have internal predecessors, (147), 5 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-09 07:47:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:24,885 INFO L93 Difference]: Finished difference Result 208 states and 236 transitions. [2024-11-09 07:47:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:47:24,886 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.068965517241379) internal successors, (147), 27 states have internal predecessors, (147), 5 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 148 [2024-11-09 07:47:24,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:24,887 INFO L225 Difference]: With dead ends: 208 [2024-11-09 07:47:24,888 INFO L226 Difference]: Without dead ends: 208 [2024-11-09 07:47:24,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=291, Invalid=1604, Unknown=1, NotChecked=84, Total=1980 [2024-11-09 07:47:24,888 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 136 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:47:24,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 811 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 797 Invalid, 0 Unknown, 138 Unchecked, 0.4s Time] [2024-11-09 07:47:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-09 07:47:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 182. [2024-11-09 07:47:24,902 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) [2024-11-09 07:47:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 210 transitions. [2024-11-09 07:47:24,902 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 210 transitions. Word has length 148 [2024-11-09 07:47:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:24,903 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 210 transitions. [2024-11-09 07:47:24,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.068965517241379) internal successors, (147), 27 states have internal predecessors, (147), 5 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-09 07:47:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 210 transitions. [2024-11-09 07:47:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-09 07:47:24,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:24,904 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] [2024-11-09 07:47:24,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 07:47:25,104 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 [2024-11-09 07:47:25,104 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)] === [2024-11-09 07:47:25,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1160568941, now seen corresponding path program 1 times [2024-11-09 07:47:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:25,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439557705] [2024-11-09 07:47:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:25,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:26,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:47:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:26,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:47:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:26,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-09 07:47:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:26,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-09 07:47:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:26,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-11-09 07:47:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:26,321 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-09 07:47:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-09 07:47:26,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:26,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439557705] [2024-11-09 07:47:26,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439557705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:26,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68057944] [2024-11-09 07:47:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:26,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:26,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:26,395 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) [2024-11-09 07:47:26,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 07:47:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:26,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-11-09 07:47:26,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:26,939 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 [2024-11-09 07:47:26,975 INFO L349 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2024-11-09 07:47:26,975 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 [2024-11-09 07:47:26,981 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 [2024-11-09 07:47:27,229 INFO L349 Elim1Store]: treesize reduction 78, result has 35.5 percent of original size [2024-11-09 07:47:27,229 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 [2024-11-09 07:47:27,233 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 [2024-11-09 07:47:27,241 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 [2024-11-09 07:47:27,626 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2024-11-09 07:47:27,626 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 [2024-11-09 07:47:27,666 INFO L349 Elim1Store]: treesize reduction 143, result has 24.7 percent of original size [2024-11-09 07:47:27,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 59 [2024-11-09 07:47:27,673 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 67 treesize of output 24 [2024-11-09 07:47:28,105 INFO L349 Elim1Store]: treesize reduction 78, result has 17.0 percent of original size [2024-11-09 07:47:28,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2024-11-09 07:47:28,110 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 61 treesize of output 18 [2024-11-09 07:47:28,135 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2024-11-09 07:47:28,135 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 [2024-11-09 07:47:28,424 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 [2024-11-09 07:47:28,448 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 [2024-11-09 07:47:28,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:47:28,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:47:28,456 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-09 07:47:28,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2024-11-09 07:47:28,484 INFO L349 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2024-11-09 07:47:28,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 31 treesize of output 39 [2024-11-09 07:47:28,643 INFO L349 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2024-11-09 07:47:28,643 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 [2024-11-09 07:47:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 39 proven. 248 refuted. 0 times theorem prover too weak. 9 trivial. 24 not checked. [2024-11-09 07:47:28,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:47:28,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68057944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:28,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:47:28,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 33] total 45 [2024-11-09 07:47:28,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510467833] [2024-11-09 07:47:28,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:47:28,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 07:47:28,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:28,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 07:47:28,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1909, Unknown=1, NotChecked=90, Total=2256 [2024-11-09 07:47:28,781 INFO L87 Difference]: Start difference. First operand 182 states and 210 transitions. Second operand has 46 states, 45 states have (on average 4.555555555555555) internal successors, (205), 42 states have internal predecessors, (205), 8 states have call successors, (10), 5 states have call predecessors, (10), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-09 07:47:32,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:47:36,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:47:40,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:47:42,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:42,067 INFO L93 Difference]: Finished difference Result 219 states and 247 transitions. [2024-11-09 07:47:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 07:47:42,067 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.555555555555555) internal successors, (205), 42 states have internal predecessors, (205), 8 states have call successors, (10), 5 states have call predecessors, (10), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 148 [2024-11-09 07:47:42,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:42,068 INFO L225 Difference]: With dead ends: 219 [2024-11-09 07:47:42,068 INFO L226 Difference]: Without dead ends: 219 [2024-11-09 07:47:42,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=716, Invalid=4254, Unknown=4, NotChecked=138, Total=5112 [2024-11-09 07:47:42,070 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 396 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:47:42,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 829 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 888 Invalid, 3 Unknown, 156 Unchecked, 12.6s Time] [2024-11-09 07:47:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-09 07:47:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 181. [2024-11-09 07:47:42,073 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) [2024-11-09 07:47:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 209 transitions. [2024-11-09 07:47:42,073 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 209 transitions. Word has length 148 [2024-11-09 07:47:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:42,074 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 209 transitions. [2024-11-09 07:47:42,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.555555555555555) internal successors, (205), 42 states have internal predecessors, (205), 8 states have call successors, (10), 5 states have call predecessors, (10), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-09 07:47:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 209 transitions. [2024-11-09 07:47:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-09 07:47:42,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:42,075 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] [2024-11-09 07:47:42,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 07:47:42,275 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 [2024-11-09 07:47:42,276 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)] === [2024-11-09 07:47:42,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1384744403, now seen corresponding path program 1 times [2024-11-09 07:47:42,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:42,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550011772] [2024-11-09 07:47:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:42,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:43,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:43,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:47:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:43,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:47:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:43,972 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-09 07:47:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:44,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-09 07:47:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:44,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-11-09 07:47:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:44,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-09 07:47:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-09 07:47:44,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:44,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550011772] [2024-11-09 07:47:44,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550011772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:44,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644868478] [2024-11-09 07:47:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:44,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:44,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:44,202 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) [2024-11-09 07:47:44,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 07:47:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:44,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-11-09 07:47:44,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:44,627 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 6 treesize of output 5 [2024-11-09 07:47:44,634 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:47:44,635 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 [2024-11-09 07:47:44,643 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 [2024-11-09 07:47:44,676 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 [2024-11-09 07:47:44,683 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 [2024-11-09 07:47:44,859 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 [2024-11-09 07:47:44,902 INFO L349 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2024-11-09 07:47:44,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2024-11-09 07:47:44,905 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 45 treesize of output 34 [2024-11-09 07:47:45,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:47:45,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2024-11-09 07:47:45,166 INFO L349 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2024-11-09 07:47:45,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 35 [2024-11-09 07:47:45,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:47:45,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2024-11-09 07:47:45,352 INFO L349 Elim1Store]: treesize reduction 60, result has 48.7 percent of original size [2024-11-09 07:47:45,352 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 47 treesize of output 73 [2024-11-09 07:47:45,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:47:45,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2024-11-09 07:47:45,523 INFO L349 Elim1Store]: treesize reduction 60, result has 48.7 percent of original size [2024-11-09 07:47:45,523 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 47 treesize of output 73 [2024-11-09 07:47:45,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:47:45,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2024-11-09 07:47:45,692 INFO L349 Elim1Store]: treesize reduction 56, result has 47.7 percent of original size [2024-11-09 07:47:45,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 65 [2024-11-09 07:47:45,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 41 [2024-11-09 07:47:45,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-11-09 07:47:45,970 INFO L349 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2024-11-09 07:47:45,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 54 [2024-11-09 07:47:46,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:47:46,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 39 [2024-11-09 07:47:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 30 proven. 141 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-11-09 07:47:46,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:47:50,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644868478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:50,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:47:50,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25] total 35 [2024-11-09 07:47:50,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425096486] [2024-11-09 07:47:50,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:47:50,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 07:47:50,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 07:47:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1200, Unknown=10, NotChecked=0, Total=1332 [2024-11-09 07:47:50,202 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) [2024-11-09 07:47:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:47:51,568 INFO L93 Difference]: Finished difference Result 274 states and 307 transitions. [2024-11-09 07:47:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 07:47:51,569 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 [2024-11-09 07:47:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:47:51,570 INFO L225 Difference]: With dead ends: 274 [2024-11-09 07:47:51,570 INFO L226 Difference]: Without dead ends: 274 [2024-11-09 07:47:51,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=455, Invalid=3441, Unknown=10, NotChecked=0, Total=3906 [2024-11-09 07:47:51,571 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 384 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:47:51,571 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 988 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 07:47:51,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-09 07:47:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 179. [2024-11-09 07:47:51,574 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) [2024-11-09 07:47:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 203 transitions. [2024-11-09 07:47:51,575 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 203 transitions. Word has length 150 [2024-11-09 07:47:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:47:51,575 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 203 transitions. [2024-11-09 07:47:51,575 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) [2024-11-09 07:47:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 203 transitions. [2024-11-09 07:47:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-09 07:47:51,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:47:51,576 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] [2024-11-09 07:47:51,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 07:47:51,776 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 [2024-11-09 07:47:51,777 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)] === [2024-11-09 07:47:51,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:47:51,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1384744404, now seen corresponding path program 1 times [2024-11-09 07:47:51,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:47:51,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544015052] [2024-11-09 07:47:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:51,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:47:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:53,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:47:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:53,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:47:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:53,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:47:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:54,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-09 07:47:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:54,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-09 07:47:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:54,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-11-09 07:47:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:54,376 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-09 07:47:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 07:47:54,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:47:54,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544015052] [2024-11-09 07:47:54,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544015052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:54,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876259254] [2024-11-09 07:47:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:47:54,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:47:54,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:47:54,514 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) [2024-11-09 07:47:54,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 07:47:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:47:54,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 196 conjuncts are in the unsatisfiable core [2024-11-09 07:47:54,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:47:54,944 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 [2024-11-09 07:47:54,951 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:47:54,951 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 [2024-11-09 07:47:54,959 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 [2024-11-09 07:47:54,962 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 [2024-11-09 07:47:55,016 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 [2024-11-09 07:47:55,022 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 [2024-11-09 07:47:55,055 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 36 treesize of output 27 [2024-11-09 07:47:55,062 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 21 treesize of output 20 [2024-11-09 07:47:55,403 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 [2024-11-09 07:47:55,460 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 25 treesize of output 18 [2024-11-09 07:47:55,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:47:55,465 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 30 treesize of output 13 [2024-11-09 07:47:55,476 INFO L349 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2024-11-09 07:47:55,476 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 33 treesize of output 41 [2024-11-09 07:47:55,479 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 54 treesize of output 41 [2024-11-09 07:47:55,789 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 25 treesize of output 18 [2024-11-09 07:47:55,795 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 65 treesize of output 48 [2024-11-09 07:47:55,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2024-11-09 07:47:55,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:47:55,803 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 18 treesize of output 13 [2024-11-09 07:47:55,813 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-09 07:47:55,813 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 20 treesize of output 22 [2024-11-09 07:47:56,056 INFO L349 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2024-11-09 07:47:56,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2024-11-09 07:47:56,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:47:56,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 35 [2024-11-09 07:47:56,067 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 25 treesize of output 18 [2024-11-09 07:47:56,146 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 [2024-11-09 07:47:56,380 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 25 treesize of output 18 [2024-11-09 07:47:56,409 INFO L349 Elim1Store]: treesize reduction 68, result has 50.4 percent of original size [2024-11-09 07:47:56,409 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 41 treesize of output 75 [2024-11-09 07:47:56,414 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 101 treesize of output 58 [2024-11-09 07:47:56,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:47:56,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2024-11-09 07:47:56,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:47:56,794 INFO L349 Elim1Store]: treesize reduction 51, result has 31.1 percent of original size [2024-11-09 07:47:56,794 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 41 treesize of output 41 [2024-11-09 07:47:56,801 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 78 treesize of output 45 [2024-11-09 07:47:56,807 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-09 07:47:56,807 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 [2024-11-09 07:47:57,264 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 74 treesize of output 57 [2024-11-09 07:47:57,268 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 47 treesize of output 35 [2024-11-09 07:47:57,291 INFO L349 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2024-11-09 07:47:57,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 53 [2024-11-09 07:47:57,295 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 47 treesize of output 36 [2024-11-09 07:47:57,298 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 19 treesize of output 11 [2024-11-09 07:47:57,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 30 treesize of output 12 [2024-11-09 07:47:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 52 proven. 262 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:47:57,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:47:57,869 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_main_~list2~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~list2~0#1.base|) .cse3)) (.cse1 (+ 9 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~list2~0#1.base|) .cse3)))) (and (or (forall ((v_ArrVal_7546 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~list2~0#1.base| v_ArrVal_7546) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 5))) (forall ((v_append_~node~0.base_147 Int) (v_ArrVal_7545 Int)) (or (< (select (store |c_#length| v_append_~node~0.base_147 v_ArrVal_7545) .cse0) .cse1) (< v_ArrVal_7545 9)))) (forall ((v_ArrVal_7545 Int)) (or (forall ((v_append_~node~0.base_147 Int)) (let ((.cse2 (store |c_#length| v_append_~node~0.base_147 v_ArrVal_7545))) (or (< (select .cse2 .cse0) .cse1) (forall ((v_ArrVal_7547 (Array Int Int)) (v_ArrVal_7546 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~list2~0#1.base| v_ArrVal_7546) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 9) (select .cse2 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~list2~0#1.base| v_ArrVal_7547) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|))))))) (< v_ArrVal_7545 9)))))) is different from false [2024-11-09 07:47:57,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876259254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:47:57,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:47:57,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 37] total 56 [2024-11-09 07:47:57,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269665978] [2024-11-09 07:47:57,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:47:57,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-09 07:47:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:47:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-09 07:47:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3280, Unknown=1, NotChecked=116, Total=3660 [2024-11-09 07:47:57,874 INFO L87 Difference]: Start difference. First operand 179 states and 203 transitions. Second operand has 57 states, 56 states have (on average 3.875) internal successors, (217), 54 states have internal predecessors, (217), 10 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-09 07:48:02,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:48:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:48:04,608 INFO L93 Difference]: Finished difference Result 333 states and 383 transitions. [2024-11-09 07:48:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 07:48:04,609 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.875) internal successors, (217), 54 states have internal predecessors, (217), 10 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) Word has length 150 [2024-11-09 07:48:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:48:04,610 INFO L225 Difference]: With dead ends: 333 [2024-11-09 07:48:04,610 INFO L226 Difference]: Without dead ends: 333 [2024-11-09 07:48:04,612 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2388 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=799, Invalid=7036, Unknown=1, NotChecked=174, Total=8010 [2024-11-09 07:48:04,612 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 722 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:48:04,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1231 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-11-09 07:48:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-11-09 07:48:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 180. [2024-11-09 07:48:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 152 states have (on average 1.230263157894737) internal successors, (187), 168 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) [2024-11-09 07:48:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 203 transitions. [2024-11-09 07:48:04,616 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 203 transitions. Word has length 150 [2024-11-09 07:48:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:48:04,616 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 203 transitions. [2024-11-09 07:48:04,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.875) internal successors, (217), 54 states have internal predecessors, (217), 10 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-09 07:48:04,617 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 203 transitions. [2024-11-09 07:48:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-09 07:48:04,617 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:48:04,617 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, 1, 1, 1, 1, 1] [2024-11-09 07:48:04,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 07:48:04,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:48:04,818 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:48:04,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:48:04,818 INFO L85 PathProgramCache]: Analyzing trace with hash 959334360, now seen corresponding path program 1 times [2024-11-09 07:48:04,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:48:04,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506205247] [2024-11-09 07:48:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:48:04,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:48:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:05,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:48:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:05,321 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:48:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:05,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:48:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:05,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-09 07:48:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:05,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-09 07:48:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:05,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-11-09 07:48:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:05,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-09 07:48:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2024-11-09 07:48:05,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:48:05,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506205247] [2024-11-09 07:48:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506205247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:48:05,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:48:05,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:48:05,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873568278] [2024-11-09 07:48:05,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:48:05,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:48:05,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:48:05,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:48:05,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:48:05,433 INFO L87 Difference]: Start difference. First operand 180 states and 203 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 07:48:05,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:48:05,515 INFO L93 Difference]: Finished difference Result 179 states and 201 transitions. [2024-11-09 07:48:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:48:05,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 155 [2024-11-09 07:48:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:48:05,516 INFO L225 Difference]: With dead ends: 179 [2024-11-09 07:48:05,516 INFO L226 Difference]: Without dead ends: 179 [2024-11-09 07:48:05,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-09 07:48:05,517 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 84 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:48:05,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 122 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:48:05,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-09 07:48:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2024-11-09 07:48:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 167 states have internal predecessors, (185), 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) [2024-11-09 07:48:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2024-11-09 07:48:05,519 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 155 [2024-11-09 07:48:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:48:05,520 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2024-11-09 07:48:05,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 07:48:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2024-11-09 07:48:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-09 07:48:05,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:48:05,521 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, 1, 1, 1, 1, 1, 1] [2024-11-09 07:48:05,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-09 07:48:05,521 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-09 07:48:05,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:48:05,521 INFO L85 PathProgramCache]: Analyzing trace with hash -323958977, now seen corresponding path program 1 times [2024-11-09 07:48:05,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:48:05,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789438877] [2024-11-09 07:48:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:48:05,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:48:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:06,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-09 07:48:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:06,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:48:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:06,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:48:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:06,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-09 07:48:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:06,519 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-09 07:48:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:06,552 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-11-09 07:48:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:06,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-11-09 07:48:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-09 07:48:06,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:48:06,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789438877] [2024-11-09 07:48:06,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789438877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:48:06,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704326472] [2024-11-09 07:48:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:48:06,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:48:06,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:48:06,618 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:48:06,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 07:48:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:48:07,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-09 07:48:07,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:48:07,044 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 [2024-11-09 07:48:07,050 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:48:07,051 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 [2024-11-09 07:48:07,086 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 15 treesize of output 1 [2024-11-09 07:48:07,105 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 33 treesize of output 17 [2024-11-09 07:48:07,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:48:07,165 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 25 treesize of output 9