./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 17:50:51,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 17:50:51,262 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 17:50:51,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 17:50:51,268 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 17:50:51,295 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 17:50:51,297 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 17:50:51,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 17:50:51,298 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 17:50:51,299 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 17:50:51,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 17:50:51,299 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 17:50:51,299 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 17:50:51,301 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 17:50:51,301 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 17:50:51,302 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 17:50:51,302 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 17:50:51,302 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 17:50:51,302 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 17:50:51,302 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 17:50:51,303 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 17:50:51,303 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 17:50:51,303 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 17:50:51,303 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 17:50:51,304 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 17:50:51,304 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 17:50:51,304 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 17:50:51,307 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 17:50:51,308 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 17:50:51,308 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 17:50:51,308 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 17:50:51,308 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 17:50:51,308 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 17:50:51,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:50:51,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 17:50:51,308 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 17:50:51,309 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 17:50:51,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 17:50:51,309 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 17:50:51,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 17:50:51,309 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 17:50:51,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 17:50:51,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2024-10-14 17:50:51,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 17:50:51,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 17:50:51,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 17:50:51,518 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 17:50:51,519 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 17:50:51,520 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-10-14 17:50:52,689 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 17:50:52,838 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 17:50:52,838 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-10-14 17:50:52,843 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047353b0a/b62427ac050c4687996e4be5294c2da8/FLAG8be0412c7 [2024-10-14 17:50:52,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047353b0a/b62427ac050c4687996e4be5294c2da8 [2024-10-14 17:50:52,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 17:50:52,856 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 17:50:52,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 17:50:52,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 17:50:52,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 17:50:52,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:50:52" (1/1) ... [2024-10-14 17:50:52,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a78a13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:52, skipping insertion in model container [2024-10-14 17:50:52,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:50:52" (1/1) ... [2024-10-14 17:50:52,878 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 17:50:53,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:50:53,015 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 17:50:53,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:50:53,059 INFO L204 MainTranslator]: Completed translation [2024-10-14 17:50:53,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53 WrapperNode [2024-10-14 17:50:53,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 17:50:53,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 17:50:53,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 17:50:53,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 17:50:53,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,079 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,104 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2024-10-14 17:50:53,105 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 17:50:53,106 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 17:50:53,106 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 17:50:53,106 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 17:50:53,114 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,120 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,143 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-10-14 17:50:53,144 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,144 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,152 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,155 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,156 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,157 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,159 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 17:50:53,159 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 17:50:53,159 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 17:50:53,160 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 17:50:53,160 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (1/1) ... [2024-10-14 17:50:53,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:50:53,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:50:53,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 17:50:53,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 17:50:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 17:50:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-14 17:50:53,252 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-14 17:50:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 17:50:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 17:50:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-10-14 17:50:53,253 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-10-14 17:50:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 17:50:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 17:50:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 17:50:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-10-14 17:50:53,253 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-10-14 17:50:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 17:50:53,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 17:50:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 17:50:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 17:50:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-10-14 17:50:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-10-14 17:50:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 17:50:53,346 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 17:50:53,348 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 17:50:53,626 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-10-14 17:50:53,626 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 17:50:53,669 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 17:50:53,669 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 17:50:53,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:50:53 BoogieIcfgContainer [2024-10-14 17:50:53,669 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 17:50:53,671 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 17:50:53,671 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 17:50:53,674 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 17:50:53,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:50:52" (1/3) ... [2024-10-14 17:50:53,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bab5a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:50:53, skipping insertion in model container [2024-10-14 17:50:53,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:50:53" (2/3) ... [2024-10-14 17:50:53,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bab5a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:50:53, skipping insertion in model container [2024-10-14 17:50:53,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:50:53" (3/3) ... [2024-10-14 17:50:53,677 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2024-10-14 17:50:53,691 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 17:50:53,692 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-10-14 17:50:53,727 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 17:50:53,732 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;@7d9b9a8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 17:50:53,732 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-10-14 17:50:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 79 states have internal predecessors, (89), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 17:50:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 17:50:53,741 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:50:53,741 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:50:53,741 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:50:53,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:50:53,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1534891119, now seen corresponding path program 1 times [2024-10-14 17:50:53,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:50:53,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710137506] [2024-10-14 17:50:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:53,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:50:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:53,885 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:50:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:53,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 17:50:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:53,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 17:50:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:53,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 17:50:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 17:50:53,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:50:53,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710137506] [2024-10-14 17:50:53,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710137506] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:50:53,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:50:53,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:50:53,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942309316] [2024-10-14 17:50:53,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:50:53,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:50:53,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:50:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:50:53,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:50:53,970 INFO L87 Difference]: Start difference. First operand has 94 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 79 states have internal predecessors, (89), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 17:50:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:50:54,076 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2024-10-14 17:50:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:50:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2024-10-14 17:50:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:50:54,088 INFO L225 Difference]: With dead ends: 103 [2024-10-14 17:50:54,088 INFO L226 Difference]: Without dead ends: 102 [2024-10-14 17:50:54,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:50:54,092 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 26 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:50:54,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:50:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-14 17:50:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2024-10-14 17:50:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 78 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 17:50:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-10-14 17:50:54,130 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 25 [2024-10-14 17:50:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:50:54,130 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-10-14 17:50:54,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 17:50:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-10-14 17:50:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 17:50:54,133 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:50:54,133 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:50:54,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 17:50:54,134 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:50:54,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:50:54,135 INFO L85 PathProgramCache]: Analyzing trace with hash 742628587, now seen corresponding path program 1 times [2024-10-14 17:50:54,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:50:54,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850012664] [2024-10-14 17:50:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:54,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:50:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:54,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:50:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:54,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 17:50:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:54,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 17:50:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:54,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 17:50:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 17:50:54,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:50:54,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850012664] [2024-10-14 17:50:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850012664] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:50:54,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:50:54,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:50:54,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574055988] [2024-10-14 17:50:54,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:50:54,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:50:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:50:54,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:50:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:50:54,425 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 17:50:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:50:54,574 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2024-10-14 17:50:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:50:54,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-10-14 17:50:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:50:54,576 INFO L225 Difference]: With dead ends: 99 [2024-10-14 17:50:54,576 INFO L226 Difference]: Without dead ends: 99 [2024-10-14 17:50:54,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:50:54,577 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 49 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:50:54,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 201 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:50:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-14 17:50:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2024-10-14 17:50:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 75 states have internal predecessors, (80), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 17:50:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2024-10-14 17:50:54,584 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 25 [2024-10-14 17:50:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:50:54,585 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2024-10-14 17:50:54,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 17:50:54,586 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2024-10-14 17:50:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 17:50:54,586 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:50:54,586 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:50:54,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 17:50:54,587 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:50:54,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:50:54,589 INFO L85 PathProgramCache]: Analyzing trace with hash 742628588, now seen corresponding path program 1 times [2024-10-14 17:50:54,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:50:54,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031165580] [2024-10-14 17:50:54,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:54,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:50:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:50:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 17:50:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 17:50:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 17:50:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 17:50:55,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:50:55,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031165580] [2024-10-14 17:50:55,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031165580] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:50:55,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:50:55,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-14 17:50:55,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613035551] [2024-10-14 17:50:55,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:50:55,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 17:50:55,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:50:55,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 17:50:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-14 17:50:55,111 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 17:50:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:50:55,371 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2024-10-14 17:50:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 17:50:55,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2024-10-14 17:50:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:50:55,373 INFO L225 Difference]: With dead ends: 105 [2024-10-14 17:50:55,375 INFO L226 Difference]: Without dead ends: 105 [2024-10-14 17:50:55,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:50:55,376 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 97 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:50:55,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 485 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:50:55,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-14 17:50:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2024-10-14 17:50:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 77 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 17:50:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2024-10-14 17:50:55,388 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 25 [2024-10-14 17:50:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:50:55,388 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2024-10-14 17:50:55,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 17:50:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2024-10-14 17:50:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 17:50:55,389 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:50:55,389 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:50:55,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 17:50:55,390 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:50:55,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:50:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1546649782, now seen corresponding path program 1 times [2024-10-14 17:50:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:50:55,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637348823] [2024-10-14 17:50:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:50:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:50:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 17:50:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 17:50:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 17:50:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 17:50:55,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:50:55,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637348823] [2024-10-14 17:50:55,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637348823] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:50:55,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:50:55,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 17:50:55,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696049770] [2024-10-14 17:50:55,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:50:55,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 17:50:55,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:50:55,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 17:50:55,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-14 17:50:55,661 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 17:50:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:50:55,925 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2024-10-14 17:50:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 17:50:55,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2024-10-14 17:50:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:50:55,926 INFO L225 Difference]: With dead ends: 102 [2024-10-14 17:50:55,926 INFO L226 Difference]: Without dead ends: 102 [2024-10-14 17:50:55,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-14 17:50:55,927 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 28 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:50:55,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 354 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:50:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-14 17:50:55,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2024-10-14 17:50:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 78 states have internal predecessors, (85), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 17:50:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2024-10-14 17:50:55,938 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 26 [2024-10-14 17:50:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:50:55,938 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2024-10-14 17:50:55,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 17:50:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2024-10-14 17:50:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 17:50:55,939 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:50:55,939 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:50:55,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 17:50:55,940 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:50:55,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:50:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1546649781, now seen corresponding path program 1 times [2024-10-14 17:50:55,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:50:55,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410596069] [2024-10-14 17:50:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:55,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:50:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,972 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:50:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 17:50:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,978 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 17:50:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 17:50:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 17:50:55,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:50:55,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410596069] [2024-10-14 17:50:55,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410596069] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:50:55,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:50:55,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:50:55,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350251965] [2024-10-14 17:50:55,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:50:55,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:50:55,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:50:55,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:50:55,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:50:55,988 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 17:50:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:50:56,073 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2024-10-14 17:50:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:50:56,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-10-14 17:50:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:50:56,077 INFO L225 Difference]: With dead ends: 101 [2024-10-14 17:50:56,077 INFO L226 Difference]: Without dead ends: 101 [2024-10-14 17:50:56,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:50:56,077 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 49 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:50:56,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 211 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:50:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-14 17:50:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2024-10-14 17:50:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 77 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 17:50:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2024-10-14 17:50:56,087 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 26 [2024-10-14 17:50:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:50:56,088 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2024-10-14 17:50:56,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 17:50:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2024-10-14 17:50:56,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 17:50:56,088 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:50:56,088 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:50:56,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 17:50:56,089 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:50:56,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:50:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash 272355240, now seen corresponding path program 1 times [2024-10-14 17:50:56,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:50:56,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199542494] [2024-10-14 17:50:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:56,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:50:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:50:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 17:50:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 17:50:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 17:50:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 17:50:56,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:50:56,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199542494] [2024-10-14 17:50:56,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199542494] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:50:56,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:50:56,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-14 17:50:56,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337014067] [2024-10-14 17:50:56,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:50:56,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 17:50:56,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:50:56,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 17:50:56,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-14 17:50:56,295 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 17:50:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:50:56,445 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-10-14 17:50:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 17:50:56,445 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-10-14 17:50:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:50:56,446 INFO L225 Difference]: With dead ends: 103 [2024-10-14 17:50:56,446 INFO L226 Difference]: Without dead ends: 103 [2024-10-14 17:50:56,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-14 17:50:56,447 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 58 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:50:56,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 507 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:50:56,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-14 17:50:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2024-10-14 17:50:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 77 states have internal predecessors, (82), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 17:50:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-10-14 17:50:56,453 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 28 [2024-10-14 17:50:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:50:56,453 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-10-14 17:50:56,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 17:50:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-10-14 17:50:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 17:50:56,454 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:50:56,454 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:50:56,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 17:50:56,455 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:50:56,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:50:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash 271845459, now seen corresponding path program 1 times [2024-10-14 17:50:56,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:50:56,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579526858] [2024-10-14 17:50:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:56,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:50:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:50:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 17:50:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-14 17:50:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 17:50:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 17:50:56,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:50:56,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579526858] [2024-10-14 17:50:56,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579526858] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:50:56,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737509185] [2024-10-14 17:50:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:56,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:50:56,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:50:56,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:50:56,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 17:50:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:56,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 17:50:56,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:50:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 17:50:56,774 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:50:56,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737509185] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:50:56,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:50:56,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2024-10-14 17:50:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992574228] [2024-10-14 17:50:56,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:50:56,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:50:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:50:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:50:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:50:56,777 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 17:50:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:50:56,848 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2024-10-14 17:50:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 17:50:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-10-14 17:50:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:50:56,849 INFO L225 Difference]: With dead ends: 95 [2024-10-14 17:50:56,850 INFO L226 Difference]: Without dead ends: 93 [2024-10-14 17:50:56,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:50:56,853 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 14 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:50:56,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 370 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:50:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-14 17:50:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-10-14 17:50:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 78 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 17:50:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-10-14 17:50:56,859 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 28 [2024-10-14 17:50:56,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:50:56,860 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-10-14 17:50:56,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 17:50:56,860 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-10-14 17:50:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-14 17:50:56,861 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:50:56,861 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:50:56,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 17:50:57,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:50:57,062 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:50:57,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:50:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2110535227, now seen corresponding path program 1 times [2024-10-14 17:50:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:50:57,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103178466] [2024-10-14 17:50:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:57,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:50:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:57,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:50:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:57,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:50:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:57,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:50:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:57,480 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:50:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 17:50:57,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:50:57,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103178466] [2024-10-14 17:50:57,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103178466] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:50:57,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299402955] [2024-10-14 17:50:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:57,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:50:57,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:50:57,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:50:57,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 17:50:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:57,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 17:50:57,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:50:57,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 17:50:57,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-14 17:50:57,774 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 17:50:57,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 17:50:57,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 17:50:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:50:58,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:50:58,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299402955] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:50:58,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 17:50:58,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2024-10-14 17:50:58,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198989953] [2024-10-14 17:50:58,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 17:50:58,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 17:50:58,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:50:58,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 17:50:58,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:50:58,395 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 17:50:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:50:59,121 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2024-10-14 17:50:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 17:50:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 29 [2024-10-14 17:50:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:50:59,122 INFO L225 Difference]: With dead ends: 107 [2024-10-14 17:50:59,123 INFO L226 Difference]: Without dead ends: 107 [2024-10-14 17:50:59,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2024-10-14 17:50:59,124 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 228 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:50:59,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 352 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:50:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-14 17:50:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2024-10-14 17:50:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 80 states have internal predecessors, (85), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 17:50:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2024-10-14 17:50:59,131 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 29 [2024-10-14 17:50:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:50:59,131 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2024-10-14 17:50:59,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 17:50:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2024-10-14 17:50:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-14 17:50:59,131 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:50:59,131 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] [2024-10-14 17:50:59,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 17:50:59,332 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,SelfDestructingSolverStorable7 [2024-10-14 17:50:59,332 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:50:59,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:50:59,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1002082631, now seen corresponding path program 1 times [2024-10-14 17:50:59,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:50:59,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062776609] [2024-10-14 17:50:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:59,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:50:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:59,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:50:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:59,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:50:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:59,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:50:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:59,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:50:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:50:59,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:50:59,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062776609] [2024-10-14 17:50:59,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062776609] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:50:59,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096492624] [2024-10-14 17:50:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:50:59,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:50:59,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:50:59,550 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:50:59,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 17:50:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:50:59,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 17:50:59,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:50:59,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-14 17:50:59,709 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-14 17:50:59,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-10-14 17:51:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:51:00,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:51:00,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096492624] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:51:00,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 17:51:00,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-10-14 17:51:00,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965623396] [2024-10-14 17:51:00,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 17:51:00,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 17:51:00,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:51:00,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 17:51:00,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-10-14 17:51:00,247 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 17:51:01,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:51:01,012 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2024-10-14 17:51:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 17:51:01,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2024-10-14 17:51:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:51:01,014 INFO L225 Difference]: With dead ends: 103 [2024-10-14 17:51:01,014 INFO L226 Difference]: Without dead ends: 103 [2024-10-14 17:51:01,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-10-14 17:51:01,014 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 121 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:51:01,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 453 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:51:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-14 17:51:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2024-10-14 17:51:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 51 states have (on average 1.6470588235294117) internal successors, (84), 79 states have internal predecessors, (84), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 17:51:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2024-10-14 17:51:01,023 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 30 [2024-10-14 17:51:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:51:01,023 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2024-10-14 17:51:01,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 17:51:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2024-10-14 17:51:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-14 17:51:01,024 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:51:01,024 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:51:01,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 17:51:01,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:51:01,225 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:51:01,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:51:01,225 INFO L85 PathProgramCache]: Analyzing trace with hash 928823460, now seen corresponding path program 2 times [2024-10-14 17:51:01,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:51:01,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033213059] [2024-10-14 17:51:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:51:01,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:51:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:01,371 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:51:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:01,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:51:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:01,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:51:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:01,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:51:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 17:51:01,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:51:01,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033213059] [2024-10-14 17:51:01,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033213059] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:51:01,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134999109] [2024-10-14 17:51:01,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:51:01,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:51:01,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:51:01,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:51:01,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 17:51:01,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:51:01,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:51:01,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-14 17:51:01,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:51:01,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 17:51:01,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-14 17:51:01,652 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 17:51:01,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 17:51:01,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 17:51:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:51:01,903 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:51:02,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134999109] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:51:02,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 17:51:02,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2024-10-14 17:51:02,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121075132] [2024-10-14 17:51:02,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 17:51:02,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 17:51:02,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:51:02,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 17:51:02,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:51:02,140 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 17:51:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:51:03,115 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2024-10-14 17:51:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-14 17:51:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 32 [2024-10-14 17:51:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:51:03,116 INFO L225 Difference]: With dead ends: 126 [2024-10-14 17:51:03,116 INFO L226 Difference]: Without dead ends: 126 [2024-10-14 17:51:03,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2024-10-14 17:51:03,118 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 240 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:51:03,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 489 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:51:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-14 17:51:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2024-10-14 17:51:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 94 states have internal predecessors, (101), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-14 17:51:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2024-10-14 17:51:03,121 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 32 [2024-10-14 17:51:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:51:03,122 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2024-10-14 17:51:03,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 17:51:03,122 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2024-10-14 17:51:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 17:51:03,122 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:51:03,123 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:51:03,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 17:51:03,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:51:03,323 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:51:03,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:51:03,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1893959440, now seen corresponding path program 1 times [2024-10-14 17:51:03,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:51:03,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115320061] [2024-10-14 17:51:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:51:03,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:51:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:03,519 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:51:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:03,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:51:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:03,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:51:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:03,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:51:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:51:03,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:51:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115320061] [2024-10-14 17:51:03,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115320061] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:51:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729246963] [2024-10-14 17:51:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:51:03,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:51:03,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:51:03,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:51:03,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 17:51:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:03,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 17:51:03,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:51:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:51:03,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:51:04,130 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 71 treesize of output 65 [2024-10-14 17:51:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:51:04,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729246963] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:51:04,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:51:04,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-10-14 17:51:04,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349434546] [2024-10-14 17:51:04,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:51:04,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-14 17:51:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:51:04,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-14 17:51:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:51:04,352 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 36 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 17:51:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:51:05,254 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2024-10-14 17:51:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 17:51:05,254 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2024-10-14 17:51:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:51:05,256 INFO L225 Difference]: With dead ends: 171 [2024-10-14 17:51:05,256 INFO L226 Difference]: Without dead ends: 171 [2024-10-14 17:51:05,257 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=2564, Unknown=0, NotChecked=0, Total=2970 [2024-10-14 17:51:05,258 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 207 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:51:05,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1005 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:51:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-10-14 17:51:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2024-10-14 17:51:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.617283950617284) internal successors, (131), 108 states have internal predecessors, (131), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-14 17:51:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2024-10-14 17:51:05,262 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 35 [2024-10-14 17:51:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:51:05,262 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2024-10-14 17:51:05,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 17:51:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2024-10-14 17:51:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 17:51:05,263 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:51:05,263 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:51:05,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 17:51:05,469 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,SelfDestructingSolverStorable10 [2024-10-14 17:51:05,470 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting upsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:51:05,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:51:05,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1893959441, now seen corresponding path program 1 times [2024-10-14 17:51:05,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:51:05,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712514044] [2024-10-14 17:51:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:51:05,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:51:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:51:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:51:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:51:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:51:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:51:05,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:51:05,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712514044] [2024-10-14 17:51:05,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712514044] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:51:05,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:51:05,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:51:05,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002295057] [2024-10-14 17:51:05,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:51:05,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:51:05,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:51:05,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:51:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:51:05,520 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 17:51:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:51:05,641 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2024-10-14 17:51:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:51:05,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2024-10-14 17:51:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:51:05,642 INFO L225 Difference]: With dead ends: 140 [2024-10-14 17:51:05,642 INFO L226 Difference]: Without dead ends: 140 [2024-10-14 17:51:05,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-14 17:51:05,643 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 62 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:51:05,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 215 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:51:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-14 17:51:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2024-10-14 17:51:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 105 states have internal predecessors, (120), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-14 17:51:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 156 transitions. [2024-10-14 17:51:05,646 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 156 transitions. Word has length 35 [2024-10-14 17:51:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:51:05,646 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 156 transitions. [2024-10-14 17:51:05,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 17:51:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 156 transitions. [2024-10-14 17:51:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-14 17:51:05,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:51:05,647 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] [2024-10-14 17:51:05,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-14 17:51:05,647 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:51:05,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:51:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1416799493, now seen corresponding path program 1 times [2024-10-14 17:51:05,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:51:05,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249998126] [2024-10-14 17:51:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:51:05,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:51:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:51:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:51:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,839 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:51:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:51:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:51:05,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:51:05,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249998126] [2024-10-14 17:51:05,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249998126] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:51:05,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170624946] [2024-10-14 17:51:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:51:05,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:51:05,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:51:05,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:51:05,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 17:51:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:05,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 17:51:05,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:51:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:51:06,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:51:06,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-10-14 17:51:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:51:06,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170624946] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:51:06,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:51:06,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-10-14 17:51:06,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688729238] [2024-10-14 17:51:06,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:51:06,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 17:51:06,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:51:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 17:51:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 17:51:06,280 INFO L87 Difference]: Start difference. First operand 130 states and 156 transitions. Second operand has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 17:51:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:51:06,747 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2024-10-14 17:51:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 17:51:06,748 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2024-10-14 17:51:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:51:06,750 INFO L225 Difference]: With dead ends: 151 [2024-10-14 17:51:06,750 INFO L226 Difference]: Without dead ends: 151 [2024-10-14 17:51:06,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-10-14 17:51:06,751 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 100 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:51:06,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 732 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:51:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-10-14 17:51:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 125. [2024-10-14 17:51:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 101 states have internal predecessors, (112), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-14 17:51:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2024-10-14 17:51:06,756 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 36 [2024-10-14 17:51:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:51:06,756 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2024-10-14 17:51:06,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 17:51:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2024-10-14 17:51:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-14 17:51:06,757 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:51:06,757 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:51:06,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-14 17:51:06,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:51:06,957 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:51:06,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:51:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash 38534880, now seen corresponding path program 1 times [2024-10-14 17:51:06,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:51:06,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211606293] [2024-10-14 17:51:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:51:06,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:51:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:07,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:51:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:07,035 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:51:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:07,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:51:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:07,045 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:51:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:51:07,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:51:07,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211606293] [2024-10-14 17:51:07,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211606293] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:51:07,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567248361] [2024-10-14 17:51:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:51:07,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:51:07,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:51:07,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:51:07,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 17:51:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:07,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 17:51:07,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:51:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:51:07,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:51:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:51:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567248361] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:51:07,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:51:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-10-14 17:51:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125419882] [2024-10-14 17:51:07,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:51:07,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 17:51:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:51:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 17:51:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-10-14 17:51:07,270 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 17:51:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:51:07,449 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2024-10-14 17:51:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 17:51:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-10-14 17:51:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:51:07,451 INFO L225 Difference]: With dead ends: 146 [2024-10-14 17:51:07,451 INFO L226 Difference]: Without dead ends: 146 [2024-10-14 17:51:07,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-10-14 17:51:07,451 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 41 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:51:07,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 605 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:51:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-14 17:51:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2024-10-14 17:51:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 107 states have internal predecessors, (117), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-14 17:51:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2024-10-14 17:51:07,458 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 38 [2024-10-14 17:51:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:51:07,458 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2024-10-14 17:51:07,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 17:51:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2024-10-14 17:51:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-14 17:51:07,458 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:51:07,459 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:51:07,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 17:51:07,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:51:07,659 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:51:07,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:51:07,660 INFO L85 PathProgramCache]: Analyzing trace with hash -546271565, now seen corresponding path program 3 times [2024-10-14 17:51:07,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:51:07,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123330729] [2024-10-14 17:51:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:51:07,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:51:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:08,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:51:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:08,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-14 17:51:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:08,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-14 17:51:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:08,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-14 17:51:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:51:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 17:51:08,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:51:08,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123330729] [2024-10-14 17:51:08,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123330729] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:51:08,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922798926] [2024-10-14 17:51:08,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:51:08,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:51:08,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:51:08,155 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:51:08,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 17:51:08,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 17:51:08,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:51:08,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-14 17:51:08,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:51:08,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 17:51:08,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 17:51:08,360 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 17:51:08,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 17:51:08,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 17:51:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-14 17:51:12,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:51:13,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922798926] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:51:13,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 17:51:13,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 27 [2024-10-14 17:51:13,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974670218] [2024-10-14 17:51:13,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 17:51:13,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-14 17:51:13,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:51:13,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-14 17:51:13,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=943, Unknown=1, NotChecked=0, Total=1122 [2024-10-14 17:51:13,295 INFO L87 Difference]: Start difference. First operand 132 states and 153 transitions. Second operand has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 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) [2024-10-14 17:51:28,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:51:32,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:51:36,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:51:40,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:51:45,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:51:49,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:51:53,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:51:57,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:52:01,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:52:05,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:52:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:52:05,435 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2024-10-14 17:52:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 17:52:05,435 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 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) Word has length 36 [2024-10-14 17:52:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:52:05,437 INFO L225 Difference]: With dead ends: 142 [2024-10-14 17:52:05,437 INFO L226 Difference]: Without dead ends: 142 [2024-10-14 17:52:05,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=455, Invalid=2094, Unknown=1, NotChecked=0, Total=2550 [2024-10-14 17:52:05,438 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 166 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 50 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:52:05,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 379 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 845 Invalid, 10 Unknown, 0 Unchecked, 41.0s Time] [2024-10-14 17:52:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-10-14 17:52:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2024-10-14 17:52:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 83 states have (on average 1.3855421686746987) internal successors, (115), 105 states have internal predecessors, (115), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-14 17:52:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2024-10-14 17:52:05,445 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 36 [2024-10-14 17:52:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:52:05,445 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2024-10-14 17:52:05,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 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) [2024-10-14 17:52:05,445 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2024-10-14 17:52:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 17:52:05,445 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:52:05,445 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] [2024-10-14 17:52:05,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 17:52:05,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 17:52:05,646 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:52:05,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:52:05,647 INFO L85 PathProgramCache]: Analyzing trace with hash -95867863, now seen corresponding path program 1 times [2024-10-14 17:52:05,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:52:05,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144688787] [2024-10-14 17:52:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:05,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:52:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:05,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:52:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:05,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:52:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:05,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:52:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:05,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:52:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:05,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 17:52:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:05,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:52:05,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144688787] [2024-10-14 17:52:05,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144688787] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:52:05,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:52:05,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:52:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575055194] [2024-10-14 17:52:05,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:52:05,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:52:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:52:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:52:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:52:05,718 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 17:52:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:52:05,849 INFO L93 Difference]: Finished difference Result 135 states and 157 transitions. [2024-10-14 17:52:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:52:05,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-10-14 17:52:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:52:05,851 INFO L225 Difference]: With dead ends: 135 [2024-10-14 17:52:05,851 INFO L226 Difference]: Without dead ends: 135 [2024-10-14 17:52:05,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-14 17:52:05,851 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 58 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:52:05,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 194 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:52:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-14 17:52:05,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2024-10-14 17:52:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 100 states have internal predecessors, (110), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-14 17:52:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2024-10-14 17:52:05,855 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 42 [2024-10-14 17:52:05,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:52:05,855 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2024-10-14 17:52:05,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 17:52:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2024-10-14 17:52:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 17:52:05,858 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:52:05,858 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] [2024-10-14 17:52:05,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-14 17:52:05,859 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:52:05,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:52:05,859 INFO L85 PathProgramCache]: Analyzing trace with hash -95867862, now seen corresponding path program 1 times [2024-10-14 17:52:05,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:52:05,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991639780] [2024-10-14 17:52:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:05,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:52:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:06,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:52:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:06,021 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:52:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:06,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:52:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:06,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:52:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:06,035 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 17:52:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:06,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:52:06,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991639780] [2024-10-14 17:52:06,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991639780] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:52:06,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215567289] [2024-10-14 17:52:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:06,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:06,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:52:06,110 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:52:06,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 17:52:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:06,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 17:52:06,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:52:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:06,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:52:06,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-10-14 17:52:06,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:52:06,504 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 21 treesize of output 25 [2024-10-14 17:52:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:06,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215567289] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:52:06,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:52:06,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2024-10-14 17:52:06,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139677554] [2024-10-14 17:52:06,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:52:06,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 17:52:06,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:52:06,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 17:52:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 17:52:06,629 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 29 states have internal predecessors, (64), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-10-14 17:52:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:52:07,417 INFO L93 Difference]: Finished difference Result 167 states and 197 transitions. [2024-10-14 17:52:07,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-14 17:52:07,417 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 29 states have internal predecessors, (64), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 42 [2024-10-14 17:52:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:52:07,418 INFO L225 Difference]: With dead ends: 167 [2024-10-14 17:52:07,418 INFO L226 Difference]: Without dead ends: 167 [2024-10-14 17:52:07,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2024-10-14 17:52:07,419 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 114 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 17:52:07,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 814 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 17:52:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-14 17:52:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 147. [2024-10-14 17:52:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.306930693069307) internal successors, (132), 116 states have internal predecessors, (132), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-14 17:52:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 176 transitions. [2024-10-14 17:52:07,426 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 176 transitions. Word has length 42 [2024-10-14 17:52:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:52:07,426 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 176 transitions. [2024-10-14 17:52:07,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 29 states have internal predecessors, (64), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-10-14 17:52:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 176 transitions. [2024-10-14 17:52:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 17:52:07,426 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:52:07,426 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:52:07,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 17:52:07,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 17:52:07,631 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:52:07,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:52:07,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1624978001, now seen corresponding path program 2 times [2024-10-14 17:52:07,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:52:07,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648696554] [2024-10-14 17:52:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:07,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:52:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:07,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:52:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:07,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-14 17:52:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:07,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-14 17:52:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:07,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-14 17:52:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:07,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:52:07,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648696554] [2024-10-14 17:52:07,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648696554] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:52:07,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773137920] [2024-10-14 17:52:07,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:52:07,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:07,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:52:07,760 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:52:07,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 17:52:07,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:52:07,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:52:07,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 17:52:07,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:52:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:07,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:52:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:08,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773137920] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:52:08,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:52:08,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 12] total 26 [2024-10-14 17:52:08,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449428599] [2024-10-14 17:52:08,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:52:08,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 17:52:08,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:52:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 17:52:08,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2024-10-14 17:52:08,153 INFO L87 Difference]: Start difference. First operand 147 states and 176 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-14 17:52:08,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:52:08,548 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2024-10-14 17:52:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 17:52:08,549 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 42 [2024-10-14 17:52:08,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:52:08,550 INFO L225 Difference]: With dead ends: 169 [2024-10-14 17:52:08,550 INFO L226 Difference]: Without dead ends: 169 [2024-10-14 17:52:08,550 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:52:08,550 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 67 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:52:08,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 748 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:52:08,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-14 17:52:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 156. [2024-10-14 17:52:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 110 states have (on average 1.290909090909091) internal successors, (142), 125 states have internal predecessors, (142), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-14 17:52:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 186 transitions. [2024-10-14 17:52:08,554 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 186 transitions. Word has length 42 [2024-10-14 17:52:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:52:08,554 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 186 transitions. [2024-10-14 17:52:08,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-14 17:52:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 186 transitions. [2024-10-14 17:52:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-14 17:52:08,555 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:52:08,555 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] [2024-10-14 17:52:08,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 17:52:08,755 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,SelfDestructingSolverStorable17 [2024-10-14 17:52:08,755 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:52:08,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:52:08,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1934539336, now seen corresponding path program 1 times [2024-10-14 17:52:08,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:52:08,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939875534] [2024-10-14 17:52:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:08,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:52:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:08,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:52:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:08,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:52:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:08,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:52:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:08,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:52:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:08,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 17:52:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:08,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:52:08,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939875534] [2024-10-14 17:52:08,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939875534] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:52:08,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327329441] [2024-10-14 17:52:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:08,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:08,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:52:08,985 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:52:08,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 17:52:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:09,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 17:52:09,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:52:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:09,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:52:09,288 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 29 treesize of output 25 [2024-10-14 17:52:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:09,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327329441] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:52:09,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:52:09,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2024-10-14 17:52:09,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045544809] [2024-10-14 17:52:09,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:52:09,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-14 17:52:09,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:52:09,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-14 17:52:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-10-14 17:52:09,735 INFO L87 Difference]: Start difference. First operand 156 states and 186 transitions. Second operand has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 27 states have internal predecessors, (68), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-14 17:52:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:52:10,421 INFO L93 Difference]: Finished difference Result 205 states and 250 transitions. [2024-10-14 17:52:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 17:52:10,422 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 27 states have internal predecessors, (68), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 44 [2024-10-14 17:52:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:52:10,423 INFO L225 Difference]: With dead ends: 205 [2024-10-14 17:52:10,423 INFO L226 Difference]: Without dead ends: 205 [2024-10-14 17:52:10,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2024-10-14 17:52:10,424 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 132 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 17:52:10,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 697 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 17:52:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-10-14 17:52:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2024-10-14 17:52:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 119 states have (on average 1.2521008403361344) internal successors, (149), 133 states have internal predecessors, (149), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-14 17:52:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 197 transitions. [2024-10-14 17:52:10,437 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 197 transitions. Word has length 44 [2024-10-14 17:52:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:52:10,437 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 197 transitions. [2024-10-14 17:52:10,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 27 states have internal predecessors, (68), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-14 17:52:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 197 transitions. [2024-10-14 17:52:10,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 17:52:10,438 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:52:10,438 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:52:10,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 17:52:10,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:10,638 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:52:10,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:52:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -92820120, now seen corresponding path program 3 times [2024-10-14 17:52:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:52:10,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872711373] [2024-10-14 17:52:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:10,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:52:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:10,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:52:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:10,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-14 17:52:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:10,981 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-14 17:52:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:10,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-14 17:52:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:10,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:52:10,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872711373] [2024-10-14 17:52:10,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872711373] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:52:10,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680769218] [2024-10-14 17:52:10,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:52:10,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:10,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:52:10,987 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:52:10,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 17:52:11,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 17:52:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:52:11,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 17:52:11,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:52:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-14 17:52:11,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:52:12,198 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 50 treesize of output 46 [2024-10-14 17:52:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-14 17:52:12,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680769218] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:52:12,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:52:12,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 47 [2024-10-14 17:52:12,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985339979] [2024-10-14 17:52:12,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:52:12,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-14 17:52:12,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:52:12,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-14 17:52:12,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2024-10-14 17:52:12,462 INFO L87 Difference]: Start difference. First operand 167 states and 197 transitions. Second operand has 48 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 15 states have call successors, (16), 8 states have call predecessors, (16), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-10-14 17:52:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:52:14,573 INFO L93 Difference]: Finished difference Result 195 states and 228 transitions. [2024-10-14 17:52:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-14 17:52:14,574 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 15 states have call successors, (16), 8 states have call predecessors, (16), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 45 [2024-10-14 17:52:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:52:14,575 INFO L225 Difference]: With dead ends: 195 [2024-10-14 17:52:14,575 INFO L226 Difference]: Without dead ends: 195 [2024-10-14 17:52:14,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=667, Invalid=5653, Unknown=0, NotChecked=0, Total=6320 [2024-10-14 17:52:14,577 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 126 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-14 17:52:14,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 944 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-14 17:52:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-10-14 17:52:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2024-10-14 17:52:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 125 states have (on average 1.256) internal successors, (157), 139 states have internal predecessors, (157), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-14 17:52:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 209 transitions. [2024-10-14 17:52:14,581 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 209 transitions. Word has length 45 [2024-10-14 17:52:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:52:14,581 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 209 transitions. [2024-10-14 17:52:14,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 15 states have call successors, (16), 8 states have call predecessors, (16), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-10-14 17:52:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 209 transitions. [2024-10-14 17:52:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-14 17:52:14,582 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:52:14,582 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:52:14,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-14 17:52:14,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:14,782 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:52:14,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:52:14,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1417543565, now seen corresponding path program 1 times [2024-10-14 17:52:14,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:52:14,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379954807] [2024-10-14 17:52:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:14,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:52:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:15,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:52:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:15,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-14 17:52:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:15,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-14 17:52:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:15,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-14 17:52:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:15,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:52:15,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379954807] [2024-10-14 17:52:15,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379954807] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:52:15,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599231951] [2024-10-14 17:52:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:15,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:15,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:52:15,152 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:52:15,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 17:52:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:15,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-14 17:52:15,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:52:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:15,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:52:15,984 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 79 treesize of output 73 [2024-10-14 17:52:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:16,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599231951] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:52:16,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:52:16,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 15] total 48 [2024-10-14 17:52:16,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884145245] [2024-10-14 17:52:16,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:52:16,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-14 17:52:16,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:52:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-14 17:52:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2024-10-14 17:52:16,393 INFO L87 Difference]: Start difference. First operand 176 states and 209 transitions. Second operand has 49 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 42 states have internal predecessors, (81), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-14 17:52:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:52:19,149 INFO L93 Difference]: Finished difference Result 275 states and 324 transitions. [2024-10-14 17:52:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-10-14 17:52:19,150 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 42 states have internal predecessors, (81), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 46 [2024-10-14 17:52:19,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:52:19,151 INFO L225 Difference]: With dead ends: 275 [2024-10-14 17:52:19,151 INFO L226 Difference]: Without dead ends: 275 [2024-10-14 17:52:19,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1172, Invalid=11484, Unknown=0, NotChecked=0, Total=12656 [2024-10-14 17:52:19,154 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 305 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-14 17:52:19,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1001 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-14 17:52:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-10-14 17:52:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 233. [2024-10-14 17:52:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 178 states have internal predecessors, (205), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-10-14 17:52:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 283 transitions. [2024-10-14 17:52:19,160 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 283 transitions. Word has length 46 [2024-10-14 17:52:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:52:19,160 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 283 transitions. [2024-10-14 17:52:19,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 42 states have internal predecessors, (81), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-14 17:52:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 283 transitions. [2024-10-14 17:52:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-14 17:52:19,161 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:52:19,161 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:52:19,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-14 17:52:19,361 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,SelfDestructingSolverStorable20 [2024-10-14 17:52:19,362 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:52:19,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:52:19,362 INFO L85 PathProgramCache]: Analyzing trace with hash 753588072, now seen corresponding path program 4 times [2024-10-14 17:52:19,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:52:19,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940204744] [2024-10-14 17:52:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:19,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:52:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:19,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:52:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:19,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-14 17:52:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:19,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-14 17:52:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:19,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-14 17:52:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:19,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:52:19,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940204744] [2024-10-14 17:52:19,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940204744] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:52:19,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233587736] [2024-10-14 17:52:19,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:52:19,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:19,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:52:19,538 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:52:19,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 17:52:19,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:52:19,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:52:19,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 17:52:19,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:52:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:19,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:52:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:20,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233587736] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:52:20,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:52:20,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2024-10-14 17:52:20,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396213990] [2024-10-14 17:52:20,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:52:20,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-14 17:52:20,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:52:20,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-14 17:52:20,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2024-10-14 17:52:20,079 INFO L87 Difference]: Start difference. First operand 233 states and 283 transitions. Second operand has 32 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 8 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 17:52:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:52:20,716 INFO L93 Difference]: Finished difference Result 276 states and 324 transitions. [2024-10-14 17:52:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-14 17:52:20,717 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 8 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2024-10-14 17:52:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:52:20,718 INFO L225 Difference]: With dead ends: 276 [2024-10-14 17:52:20,718 INFO L226 Difference]: Without dead ends: 276 [2024-10-14 17:52:20,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2024-10-14 17:52:20,719 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 87 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:52:20,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 534 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:52:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-10-14 17:52:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2024-10-14 17:52:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 156 states have (on average 1.2435897435897436) internal successors, (194), 171 states have internal predecessors, (194), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2024-10-14 17:52:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 260 transitions. [2024-10-14 17:52:20,724 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 260 transitions. Word has length 48 [2024-10-14 17:52:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:52:20,724 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 260 transitions. [2024-10-14 17:52:20,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 8 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 17:52:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 260 transitions. [2024-10-14 17:52:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-14 17:52:20,724 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:52:20,725 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:52:20,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-14 17:52:20,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:20,926 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:52:20,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:52:20,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1616791872, now seen corresponding path program 1 times [2024-10-14 17:52:20,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:52:20,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998172257] [2024-10-14 17:52:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:20,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:52:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:21,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:52:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:21,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 17:52:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:21,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 17:52:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:21,066 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 17:52:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:21,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 17:52:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:21,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:52:21,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998172257] [2024-10-14 17:52:21,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998172257] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:52:21,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154652939] [2024-10-14 17:52:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:21,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:21,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:52:21,075 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:52:21,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 17:52:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:21,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 17:52:21,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:52:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:21,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:52:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:21,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154652939] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:52:21,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:52:21,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-10-14 17:52:21,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497753204] [2024-10-14 17:52:21,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:52:21,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 17:52:21,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:52:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 17:52:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2024-10-14 17:52:21,439 INFO L87 Difference]: Start difference. First operand 219 states and 260 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-10-14 17:52:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:52:21,710 INFO L93 Difference]: Finished difference Result 253 states and 297 transitions. [2024-10-14 17:52:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 17:52:21,711 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 50 [2024-10-14 17:52:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:52:21,712 INFO L225 Difference]: With dead ends: 253 [2024-10-14 17:52:21,712 INFO L226 Difference]: Without dead ends: 253 [2024-10-14 17:52:21,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 17:52:21,724 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:52:21,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 891 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:52:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-10-14 17:52:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 230. [2024-10-14 17:52:21,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 165 states have (on average 1.2303030303030302) internal successors, (203), 180 states have internal predecessors, (203), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2024-10-14 17:52:21,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 271 transitions. [2024-10-14 17:52:21,732 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 271 transitions. Word has length 50 [2024-10-14 17:52:21,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:52:21,733 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 271 transitions. [2024-10-14 17:52:21,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-10-14 17:52:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 271 transitions. [2024-10-14 17:52:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-14 17:52:21,734 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:52:21,734 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:52:21,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-14 17:52:21,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:21,936 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-14 17:52:21,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:52:21,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1867937572, now seen corresponding path program 1 times [2024-10-14 17:52:21,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:52:21,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463058527] [2024-10-14 17:52:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:21,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:52:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:22,349 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 17:52:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:22,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-14 17:52:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:22,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-14 17:52:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:22,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-14 17:52:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:22,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 17:52:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:22,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:52:22,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463058527] [2024-10-14 17:52:22,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463058527] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:52:22,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978990015] [2024-10-14 17:52:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:52:22,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:52:22,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:52:22,468 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:52:22,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 17:52:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:52:22,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-14 17:52:22,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:52:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 17:52:23,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:52:24,159 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 256 treesize of output 246 [2024-10-14 17:52:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:52:25,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978990015] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:52:25,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:52:25,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 16] total 55 [2024-10-14 17:52:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082594374] [2024-10-14 17:52:25,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:52:25,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-14 17:52:25,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:52:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-14 17:52:25,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2800, Unknown=0, NotChecked=0, Total=3080 [2024-10-14 17:52:25,136 INFO L87 Difference]: Start difference. First operand 230 states and 271 transitions. Second operand has 56 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 48 states have internal predecessors, (93), 15 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12)