./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f6ffaa15235a1424658c74c69505398b6d7973f6f82933a9f22a2b097e3c0057 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 18:09:10,128 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 18:09:10,213 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-10-11 18:09:10,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 18:09:10,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 18:09:10,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 18:09:10,254 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 18:09:10,255 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 18:09:10,256 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 18:09:10,256 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 18:09:10,256 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 18:09:10,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 18:09:10,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 18:09:10,261 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 18:09:10,262 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 18:09:10,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 18:09:10,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 18:09:10,263 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 18:09:10,264 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 18:09:10,264 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 18:09:10,264 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 18:09:10,268 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 18:09:10,269 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 18:09:10,269 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 18:09:10,269 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 18:09:10,269 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 18:09:10,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 18:09:10,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 18:09:10,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 18:09:10,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 18:09:10,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 18:09:10,274 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 18:09:10,274 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 18:09:10,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 18:09:10,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 18:09:10,275 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 18:09:10,275 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 18:09:10,275 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 18:09:10,275 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 18:09:10,276 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6ffaa15235a1424658c74c69505398b6d7973f6f82933a9f22a2b097e3c0057 [2024-10-11 18:09:10,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 18:09:10,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 18:09:10,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 18:09:10,629 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 18:09:10,630 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 18:09:10,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i [2024-10-11 18:09:12,332 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 18:09:12,664 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 18:09:12,665 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i [2024-10-11 18:09:12,691 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/0a6d077a1/c04a50c393bd43fe8300abbdd0c66807/FLAG5589245b1 [2024-10-11 18:09:12,707 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/0a6d077a1/c04a50c393bd43fe8300abbdd0c66807 [2024-10-11 18:09:12,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 18:09:12,712 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 18:09:12,713 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 18:09:12,714 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 18:09:12,721 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 18:09:12,721 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:09:12" (1/1) ... [2024-10-11 18:09:12,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e19e782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:12, skipping insertion in model container [2024-10-11 18:09:12,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:09:12" (1/1) ... [2024-10-11 18:09:12,790 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 18:09:13,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 18:09:13,182 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 18:09:13,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 18:09:13,292 INFO L204 MainTranslator]: Completed translation [2024-10-11 18:09:13,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13 WrapperNode [2024-10-11 18:09:13,294 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 18:09:13,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 18:09:13,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 18:09:13,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 18:09:13,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,323 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,353 INFO L138 Inliner]: procedures = 122, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 81 [2024-10-11 18:09:13,354 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 18:09:13,355 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 18:09:13,355 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 18:09:13,355 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 18:09:13,368 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,369 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,373 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,416 INFO L175 MemorySlicer]: Split 22 memory accesses to 1 slices as follows [22]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 10 writes are split as follows [10]. [2024-10-11 18:09:13,416 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,417 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,429 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,436 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,442 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,444 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,450 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 18:09:13,455 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 18:09:13,455 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 18:09:13,455 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 18:09:13,456 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (1/1) ... [2024-10-11 18:09:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 18:09:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:09:13,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 18:09:13,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 18:09:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure loop_internal [2024-10-11 18:09:13,570 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_internal [2024-10-11 18:09:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2024-10-11 18:09:13,570 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2024-10-11 18:09:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure create_internal [2024-10-11 18:09:13,571 INFO L138 BoogieDeclarations]: Found implementation of procedure create_internal [2024-10-11 18:09:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-10-11 18:09:13,572 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-10-11 18:09:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 18:09:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-11 18:09:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_internal [2024-10-11 18:09:13,572 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_internal [2024-10-11 18:09:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-11 18:09:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 18:09:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 18:09:13,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 18:09:13,698 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 18:09:13,701 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 18:09:14,152 INFO L? ?]: Removed 126 outVars from TransFormulas that were not future-live. [2024-10-11 18:09:14,152 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 18:09:14,199 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 18:09:14,199 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-11 18:09:14,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:09:14 BoogieIcfgContainer [2024-10-11 18:09:14,200 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 18:09:14,202 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 18:09:14,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 18:09:14,206 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 18:09:14,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 06:09:12" (1/3) ... [2024-10-11 18:09:14,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4424cc79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:09:14, skipping insertion in model container [2024-10-11 18:09:14,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:09:13" (2/3) ... [2024-10-11 18:09:14,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4424cc79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:09:14, skipping insertion in model container [2024-10-11 18:09:14,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:09:14" (3/3) ... [2024-10-11 18:09:14,210 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll-twice.i [2024-10-11 18:09:14,230 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 18:09:14,232 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 51 error locations. [2024-10-11 18:09:14,294 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 18:09:14,304 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;@6c223d49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 18:09:14,305 INFO L334 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2024-10-11 18:09:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 105 states have internal predecessors, (117), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 18:09:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-11 18:09:14,319 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:14,320 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-11 18:09:14,320 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:14,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash 8271905, now seen corresponding path program 1 times [2024-10-11 18:09:14,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:14,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977638161] [2024-10-11 18:09:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:14,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:09:14,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:14,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977638161] [2024-10-11 18:09:14,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977638161] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:09:14,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:09:14,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 18:09:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608187389] [2024-10-11 18:09:14,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:09:14,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 18:09:14,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 18:09:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:09:14,663 INFO L87 Difference]: Start difference. First operand has 123 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 105 states have internal predecessors, (117), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:09:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:14,864 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2024-10-11 18:09:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 18:09:14,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-11 18:09:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:14,878 INFO L225 Difference]: With dead ends: 120 [2024-10-11 18:09:14,879 INFO L226 Difference]: Without dead ends: 119 [2024-10-11 18:09:14,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:09:14,885 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:14,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 186 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 18:09:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-11 18:09:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-10-11 18:09:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 101 states have internal predecessors, (107), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 18:09:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2024-10-11 18:09:14,947 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 4 [2024-10-11 18:09:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:14,948 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2024-10-11 18:09:14,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:09:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2024-10-11 18:09:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-11 18:09:14,949 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:14,949 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-11 18:09:14,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 18:09:14,950 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:14,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:14,952 INFO L85 PathProgramCache]: Analyzing trace with hash 8271906, now seen corresponding path program 1 times [2024-10-11 18:09:14,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:14,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958917562] [2024-10-11 18:09:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:14,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:09:15,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:15,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958917562] [2024-10-11 18:09:15,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958917562] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:09:15,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:09:15,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 18:09:15,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555895654] [2024-10-11 18:09:15,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:09:15,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 18:09:15,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:15,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 18:09:15,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:09:15,109 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:09:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:15,238 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2024-10-11 18:09:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 18:09:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-11 18:09:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:15,240 INFO L225 Difference]: With dead ends: 116 [2024-10-11 18:09:15,243 INFO L226 Difference]: Without dead ends: 116 [2024-10-11 18:09:15,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:09:15,245 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:15,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 191 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:09:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-11 18:09:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-10-11 18:09:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 98 states have internal predecessors, (104), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 18:09:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2024-10-11 18:09:15,272 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 4 [2024-10-11 18:09:15,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:15,273 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2024-10-11 18:09:15,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:09:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2024-10-11 18:09:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 18:09:15,274 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:15,274 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:15,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 18:09:15,275 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:15,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1691344441, now seen corresponding path program 1 times [2024-10-11 18:09:15,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:15,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110555824] [2024-10-11 18:09:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:15,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:15,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:09:15,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:15,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110555824] [2024-10-11 18:09:15,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110555824] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:09:15,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:09:15,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 18:09:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021986426] [2024-10-11 18:09:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:09:15,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 18:09:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:15,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 18:09:15,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:09:15,453 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:09:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:15,716 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2024-10-11 18:09:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:09:15,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-11 18:09:15,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:15,722 INFO L225 Difference]: With dead ends: 127 [2024-10-11 18:09:15,725 INFO L226 Difference]: Without dead ends: 127 [2024-10-11 18:09:15,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:09:15,727 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 19 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:15,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 175 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 18:09:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-11 18:09:15,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2024-10-11 18:09:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 97 states have internal predecessors, (103), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 18:09:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2024-10-11 18:09:15,751 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 12 [2024-10-11 18:09:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:15,751 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2024-10-11 18:09:15,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:09:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2024-10-11 18:09:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 18:09:15,752 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:15,752 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:15,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 18:09:15,753 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:15,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:15,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1691344442, now seen corresponding path program 1 times [2024-10-11 18:09:15,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:15,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521622802] [2024-10-11 18:09:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:15,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:15,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:09:15,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:15,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521622802] [2024-10-11 18:09:15,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521622802] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:09:15,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:09:15,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 18:09:15,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562076464] [2024-10-11 18:09:15,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:09:15,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 18:09:15,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 18:09:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:09:15,924 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:09:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:16,125 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2024-10-11 18:09:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:09:16,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-11 18:09:16,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:16,128 INFO L225 Difference]: With dead ends: 126 [2024-10-11 18:09:16,129 INFO L226 Difference]: Without dead ends: 126 [2024-10-11 18:09:16,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:09:16,131 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 19 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:16,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 178 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 18:09:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-11 18:09:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2024-10-11 18:09:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 96 states have internal predecessors, (102), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 18:09:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2024-10-11 18:09:16,144 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 12 [2024-10-11 18:09:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:16,144 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2024-10-11 18:09:16,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:09:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2024-10-11 18:09:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 18:09:16,145 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:16,145 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:16,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 18:09:16,146 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:16,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2072795497, now seen corresponding path program 1 times [2024-10-11 18:09:16,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:16,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844499118] [2024-10-11 18:09:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:16,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:16,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 18:09:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:16,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:09:16,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:16,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844499118] [2024-10-11 18:09:16,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844499118] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:09:16,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:09:16,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 18:09:16,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419894850] [2024-10-11 18:09:16,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:09:16,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 18:09:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 18:09:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:09:16,769 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:09:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:17,316 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2024-10-11 18:09:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 18:09:17,316 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2024-10-11 18:09:17,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:17,319 INFO L225 Difference]: With dead ends: 145 [2024-10-11 18:09:17,319 INFO L226 Difference]: Without dead ends: 145 [2024-10-11 18:09:17,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-10-11 18:09:17,320 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 64 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:17,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 285 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 18:09:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-10-11 18:09:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 127. [2024-10-11 18:09:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 66 states have (on average 1.878787878787879) internal successors, (124), 104 states have internal predecessors, (124), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (17), 17 states have call predecessors, (17), 13 states have call successors, (17) [2024-10-11 18:09:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 154 transitions. [2024-10-11 18:09:17,343 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 154 transitions. Word has length 19 [2024-10-11 18:09:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:17,343 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 154 transitions. [2024-10-11 18:09:17,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:09:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 154 transitions. [2024-10-11 18:09:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 18:09:17,344 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:17,344 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:17,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 18:09:17,345 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:17,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2072795496, now seen corresponding path program 1 times [2024-10-11 18:09:17,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:17,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697848136] [2024-10-11 18:09:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:17,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:17,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:17,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 18:09:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:17,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:09:17,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:17,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697848136] [2024-10-11 18:09:17,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697848136] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:09:17,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:09:17,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-11 18:09:17,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091675146] [2024-10-11 18:09:17,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:09:17,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 18:09:17,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:17,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 18:09:17,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-11 18:09:17,935 INFO L87 Difference]: Start difference. First operand 127 states and 154 transitions. Second operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:09:18,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:18,557 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2024-10-11 18:09:18,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:09:18,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2024-10-11 18:09:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:18,559 INFO L225 Difference]: With dead ends: 158 [2024-10-11 18:09:18,559 INFO L226 Difference]: Without dead ends: 158 [2024-10-11 18:09:18,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-11 18:09:18,560 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 46 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:18,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 333 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 18:09:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-11 18:09:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 140. [2024-10-11 18:09:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 113 states have internal predecessors, (137), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (24), 21 states have call predecessors, (24), 17 states have call successors, (24) [2024-10-11 18:09:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2024-10-11 18:09:18,582 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 19 [2024-10-11 18:09:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:18,583 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2024-10-11 18:09:18,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:09:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2024-10-11 18:09:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-11 18:09:18,584 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:18,584 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:18,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 18:09:18,584 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:18,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash 947437139, now seen corresponding path program 1 times [2024-10-11 18:09:18,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:18,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70251030] [2024-10-11 18:09:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:18,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:18,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:09:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:18,779 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 18:09:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:09:18,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:18,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70251030] [2024-10-11 18:09:18,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70251030] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:18,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259482003] [2024-10-11 18:09:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:18,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:18,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:09:18,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:09:18,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 18:09:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:18,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 18:09:18,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:09:19,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 18:09:19,099 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-10-11 18:09:19,135 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 18:09:19,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-11 18:09:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-10-11 18:09:19,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:09:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:09:19,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259482003] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:09:19,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:09:19,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2024-10-11 18:09:19,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889841821] [2024-10-11 18:09:19,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:09:19,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 18:09:19,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 18:09:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2024-10-11 18:09:19,321 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 18:09:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:19,880 INFO L93 Difference]: Finished difference Result 153 states and 195 transitions. [2024-10-11 18:09:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:09:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 21 [2024-10-11 18:09:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:19,882 INFO L225 Difference]: With dead ends: 153 [2024-10-11 18:09:19,882 INFO L226 Difference]: Without dead ends: 153 [2024-10-11 18:09:19,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=188, Unknown=1, NotChecked=28, Total=272 [2024-10-11 18:09:19,883 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 68 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:19,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 380 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 558 Invalid, 0 Unknown, 148 Unchecked, 0.4s Time] [2024-10-11 18:09:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-11 18:09:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2024-10-11 18:09:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 76 states have (on average 1.8157894736842106) internal successors, (138), 113 states have internal predecessors, (138), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2024-10-11 18:09:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2024-10-11 18:09:19,899 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 21 [2024-10-11 18:09:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:19,900 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2024-10-11 18:09:19,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 18:09:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2024-10-11 18:09:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-11 18:09:19,901 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:19,901 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:19,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 18:09:20,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:20,103 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:20,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash 947437140, now seen corresponding path program 1 times [2024-10-11 18:09:20,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:20,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033757991] [2024-10-11 18:09:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:20,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:20,321 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:20,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:09:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:20,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 18:09:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:09:20,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:20,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033757991] [2024-10-11 18:09:20,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033757991] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:20,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334106122] [2024-10-11 18:09:20,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:20,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:20,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:09:20,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:09:20,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 18:09:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:20,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 18:09:20,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:09:20,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 18:09:20,660 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base 8) |c_#length|)) is different from true [2024-10-11 18:09:20,681 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 18:09:20,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-11 18:09:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-10-11 18:09:20,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:09:20,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334106122] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:20,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:09:20,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2024-10-11 18:09:20,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559149321] [2024-10-11 18:09:20,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:09:20,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 18:09:20,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:20,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 18:09:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=172, Unknown=1, NotChecked=26, Total=240 [2024-10-11 18:09:20,787 INFO L87 Difference]: Start difference. First operand 141 states and 181 transitions. Second operand has 14 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-11 18:09:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:21,343 INFO L93 Difference]: Finished difference Result 154 states and 195 transitions. [2024-10-11 18:09:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 18:09:21,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 21 [2024-10-11 18:09:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:21,345 INFO L225 Difference]: With dead ends: 154 [2024-10-11 18:09:21,345 INFO L226 Difference]: Without dead ends: 154 [2024-10-11 18:09:21,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=282, Unknown=1, NotChecked=34, Total=380 [2024-10-11 18:09:21,350 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 77 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:21,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 351 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 552 Invalid, 0 Unknown, 148 Unchecked, 0.4s Time] [2024-10-11 18:09:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-10-11 18:09:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 142. [2024-10-11 18:09:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 114 states have internal predecessors, (138), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2024-10-11 18:09:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 181 transitions. [2024-10-11 18:09:21,363 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 181 transitions. Word has length 21 [2024-10-11 18:09:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:21,364 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 181 transitions. [2024-10-11 18:09:21,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-11 18:09:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 181 transitions. [2024-10-11 18:09:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-11 18:09:21,366 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:21,366 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:21,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 18:09:21,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:21,568 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:21,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1631406481, now seen corresponding path program 1 times [2024-10-11 18:09:21,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:21,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24168813] [2024-10-11 18:09:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:21,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:21,757 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:21,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 18:09:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:22,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:22,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 18:09:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 18:09:22,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:22,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24168813] [2024-10-11 18:09:22,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24168813] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:22,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365609893] [2024-10-11 18:09:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:22,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:22,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:09:22,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:09:22,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 18:09:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:22,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 18:09:22,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:09:22,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 18:09:22,441 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-10-11 18:09:22,492 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-10-11 18:09:22,742 INFO L349 Elim1Store]: treesize reduction 104, result has 34.2 percent of original size [2024-10-11 18:09:22,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 40 treesize of output 104 [2024-10-11 18:09:23,311 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 12 treesize of output 9 [2024-10-11 18:09:23,372 INFO L349 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2024-10-11 18:09:23,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 33 [2024-10-11 18:09:23,393 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-10-11 18:09:23,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 14 [2024-10-11 18:09:23,421 INFO L349 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2024-10-11 18:09:23,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 16 [2024-10-11 18:09:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-10-11 18:09:23,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:09:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365609893] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:23,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:09:23,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2024-10-11 18:09:23,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098718248] [2024-10-11 18:09:23,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:09:23,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 18:09:23,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 18:09:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=166, Unknown=2, NotChecked=54, Total=272 [2024-10-11 18:09:23,569 INFO L87 Difference]: Start difference. First operand 142 states and 181 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-11 18:09:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:24,432 INFO L93 Difference]: Finished difference Result 170 states and 223 transitions. [2024-10-11 18:09:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:09:24,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 27 [2024-10-11 18:09:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:24,435 INFO L225 Difference]: With dead ends: 170 [2024-10-11 18:09:24,435 INFO L226 Difference]: Without dead ends: 170 [2024-10-11 18:09:24,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=212, Unknown=2, NotChecked=62, Total=342 [2024-10-11 18:09:24,438 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 55 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 31 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:24,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 403 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 866 Invalid, 3 Unknown, 356 Unchecked, 0.8s Time] [2024-10-11 18:09:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-11 18:09:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 147. [2024-10-11 18:09:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.7777777777777777) internal successors, (144), 118 states have internal predecessors, (144), 18 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (32), 23 states have call predecessors, (32), 18 states have call successors, (32) [2024-10-11 18:09:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 194 transitions. [2024-10-11 18:09:24,453 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 194 transitions. Word has length 27 [2024-10-11 18:09:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:24,453 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 194 transitions. [2024-10-11 18:09:24,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-11 18:09:24,454 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 194 transitions. [2024-10-11 18:09:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-11 18:09:24,454 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:24,454 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:24,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 18:09:24,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:24,655 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:24,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1631406480, now seen corresponding path program 1 times [2024-10-11 18:09:24,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:24,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477138674] [2024-10-11 18:09:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:24,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:24,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:25,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 18:09:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:25,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:25,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 18:09:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:09:25,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:25,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477138674] [2024-10-11 18:09:25,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477138674] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:25,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254540028] [2024-10-11 18:09:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:25,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:25,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:09:25,563 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:09:25,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 18:09:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:25,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-11 18:09:25,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:09:25,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 18:09:25,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 18:09:26,004 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-10-11 18:09:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:09:26,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:09:26,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2024-10-11 18:09:26,151 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-10-11 18:09:26,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-10-11 18:09:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-11 18:09:26,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:09:26,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254540028] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:26,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:09:26,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2024-10-11 18:09:26,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208225692] [2024-10-11 18:09:26,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:09:26,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 18:09:26,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:26,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 18:09:26,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=647, Unknown=1, NotChecked=52, Total=812 [2024-10-11 18:09:26,405 INFO L87 Difference]: Start difference. First operand 147 states and 194 transitions. Second operand has 27 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-11 18:09:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:27,507 INFO L93 Difference]: Finished difference Result 187 states and 247 transitions. [2024-10-11 18:09:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 18:09:27,508 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 27 [2024-10-11 18:09:27,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:27,509 INFO L225 Difference]: With dead ends: 187 [2024-10-11 18:09:27,509 INFO L226 Difference]: Without dead ends: 187 [2024-10-11 18:09:27,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=742, Unknown=1, NotChecked=56, Total=930 [2024-10-11 18:09:27,512 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 173 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:27,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 413 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1223 Invalid, 0 Unknown, 198 Unchecked, 0.9s Time] [2024-10-11 18:09:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-10-11 18:09:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 144. [2024-10-11 18:09:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 79 states have (on average 1.7848101265822784) internal successors, (141), 116 states have internal predecessors, (141), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2024-10-11 18:09:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 184 transitions. [2024-10-11 18:09:27,527 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 184 transitions. Word has length 27 [2024-10-11 18:09:27,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:27,527 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 184 transitions. [2024-10-11 18:09:27,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-11 18:09:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 184 transitions. [2024-10-11 18:09:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 18:09:27,529 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:27,530 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:27,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 18:09:27,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 18:09:27,731 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:27,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash -79480789, now seen corresponding path program 1 times [2024-10-11 18:09:27,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:27,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363535362] [2024-10-11 18:09:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:27,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:27,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:27,896 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:09:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:27,901 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 18:09:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:27,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-11 18:09:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 18:09:27,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:27,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363535362] [2024-10-11 18:09:27,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363535362] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:27,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866143304] [2024-10-11 18:09:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:27,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:27,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:09:27,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:09:27,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 18:09:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:28,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 18:09:28,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:09:28,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 18:09:28,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 18:09:28,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 18:09:28,154 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-10-11 18:09:28,169 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 18:09:28,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-11 18:09:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-11 18:09:28,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:09:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:09:28,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866143304] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:09:28,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:09:28,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 12 [2024-10-11 18:09:28,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844535616] [2024-10-11 18:09:28,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:09:28,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 18:09:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:28,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 18:09:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=104, Unknown=1, NotChecked=20, Total=156 [2024-10-11 18:09:28,278 INFO L87 Difference]: Start difference. First operand 144 states and 184 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 18:09:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:28,837 INFO L93 Difference]: Finished difference Result 157 states and 205 transitions. [2024-10-11 18:09:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 18:09:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 29 [2024-10-11 18:09:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:28,839 INFO L225 Difference]: With dead ends: 157 [2024-10-11 18:09:28,839 INFO L226 Difference]: Without dead ends: 157 [2024-10-11 18:09:28,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=246, Unknown=1, NotChecked=32, Total=342 [2024-10-11 18:09:28,840 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 84 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:28,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 386 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 582 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2024-10-11 18:09:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-10-11 18:09:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2024-10-11 18:09:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 79 states have (on average 1.7721518987341771) internal successors, (140), 115 states have internal predecessors, (140), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2024-10-11 18:09:28,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 183 transitions. [2024-10-11 18:09:28,851 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 183 transitions. Word has length 29 [2024-10-11 18:09:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:28,852 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 183 transitions. [2024-10-11 18:09:28,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 18:09:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 183 transitions. [2024-10-11 18:09:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 18:09:28,854 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:28,854 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:28,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 18:09:29,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 18:09:29,056 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:29,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash -79480788, now seen corresponding path program 1 times [2024-10-11 18:09:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:29,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381198038] [2024-10-11 18:09:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:29,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:29,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:29,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:09:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:29,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 18:09:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:29,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-11 18:09:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 18:09:29,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:29,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381198038] [2024-10-11 18:09:29,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381198038] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:29,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963648468] [2024-10-11 18:09:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:29,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:29,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:09:29,476 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:09:29,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 18:09:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:29,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 18:09:29,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:09:29,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 18:09:29,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 18:09:29,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 18:09:29,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 18:09:29,736 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base 8) |c_#length|)) is different from true [2024-10-11 18:09:29,750 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 18:09:29,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-11 18:09:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-11 18:09:29,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:09:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:09:30,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963648468] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:09:30,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:09:30,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-10-11 18:09:30,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675013604] [2024-10-11 18:09:30,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:09:30,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 18:09:30,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:30,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 18:09:30,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=403, Unknown=1, NotChecked=40, Total=506 [2024-10-11 18:09:30,030 INFO L87 Difference]: Start difference. First operand 143 states and 183 transitions. Second operand has 23 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-11 18:09:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:31,457 INFO L93 Difference]: Finished difference Result 155 states and 203 transitions. [2024-10-11 18:09:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 18:09:31,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 29 [2024-10-11 18:09:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:31,461 INFO L225 Difference]: With dead ends: 155 [2024-10-11 18:09:31,461 INFO L226 Difference]: Without dead ends: 155 [2024-10-11 18:09:31,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=747, Unknown=1, NotChecked=56, Total=930 [2024-10-11 18:09:31,463 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 113 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:31,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 725 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1173 Invalid, 0 Unknown, 145 Unchecked, 1.1s Time] [2024-10-11 18:09:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-10-11 18:09:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2024-10-11 18:09:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 113 states have internal predecessors, (138), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2024-10-11 18:09:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2024-10-11 18:09:31,473 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 29 [2024-10-11 18:09:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:31,473 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2024-10-11 18:09:31,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-11 18:09:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2024-10-11 18:09:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 18:09:31,478 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:31,478 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] [2024-10-11 18:09:31,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 18:09:31,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 18:09:31,680 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:31,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:31,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1913750456, now seen corresponding path program 1 times [2024-10-11 18:09:31,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:31,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920930194] [2024-10-11 18:09:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:31,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:31,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:31,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 18:09:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:31,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:31,779 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 18:09:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:31,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:09:31,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:31,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920930194] [2024-10-11 18:09:31,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920930194] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:09:31,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:09:31,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 18:09:31,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456711920] [2024-10-11 18:09:31,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:09:31,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 18:09:31,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:31,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 18:09:31,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 18:09:31,801 INFO L87 Difference]: Start difference. First operand 141 states and 181 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-11 18:09:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:32,082 INFO L93 Difference]: Finished difference Result 174 states and 234 transitions. [2024-10-11 18:09:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:09:32,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2024-10-11 18:09:32,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:32,086 INFO L225 Difference]: With dead ends: 174 [2024-10-11 18:09:32,086 INFO L226 Difference]: Without dead ends: 174 [2024-10-11 18:09:32,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:09:32,087 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 40 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:32,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 210 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 18:09:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-10-11 18:09:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2024-10-11 18:09:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 93 states have (on average 1.8064516129032258) internal successors, (168), 123 states have internal predecessors, (168), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (29), 26 states have call predecessors, (29), 20 states have call successors, (29) [2024-10-11 18:09:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 217 transitions. [2024-10-11 18:09:32,098 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 217 transitions. Word has length 35 [2024-10-11 18:09:32,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:32,098 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 217 transitions. [2024-10-11 18:09:32,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-11 18:09:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 217 transitions. [2024-10-11 18:09:32,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 18:09:32,101 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:32,101 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] [2024-10-11 18:09:32,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 18:09:32,101 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:32,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:32,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1913750455, now seen corresponding path program 1 times [2024-10-11 18:09:32,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:32,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089337234] [2024-10-11 18:09:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,256 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 18:09:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,320 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 18:09:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:09:32,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:32,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089337234] [2024-10-11 18:09:32,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089337234] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:09:32,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:09:32,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 18:09:32,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950451621] [2024-10-11 18:09:32,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:09:32,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 18:09:32,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:32,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 18:09:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:09:32,339 INFO L87 Difference]: Start difference. First operand 155 states and 217 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-11 18:09:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:32,677 INFO L93 Difference]: Finished difference Result 180 states and 243 transitions. [2024-10-11 18:09:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 18:09:32,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2024-10-11 18:09:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:32,679 INFO L225 Difference]: With dead ends: 180 [2024-10-11 18:09:32,679 INFO L226 Difference]: Without dead ends: 180 [2024-10-11 18:09:32,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:09:32,680 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 37 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:32,680 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 402 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 18:09:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-10-11 18:09:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 164. [2024-10-11 18:09:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 100 states have (on average 1.76) internal successors, (176), 130 states have internal predecessors, (176), 22 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (31), 28 states have call predecessors, (31), 22 states have call successors, (31) [2024-10-11 18:09:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 229 transitions. [2024-10-11 18:09:32,687 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 229 transitions. Word has length 35 [2024-10-11 18:09:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:32,687 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 229 transitions. [2024-10-11 18:09:32,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-11 18:09:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 229 transitions. [2024-10-11 18:09:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 18:09:32,688 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:32,688 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] [2024-10-11 18:09:32,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 18:09:32,689 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:32,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:32,689 INFO L85 PathProgramCache]: Analyzing trace with hash -868225860, now seen corresponding path program 1 times [2024-10-11 18:09:32,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:32,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022985529] [2024-10-11 18:09:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:32,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,820 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 18:09:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 18:09:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,870 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:09:32,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:32,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022985529] [2024-10-11 18:09:32,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022985529] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:09:32,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:09:32,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 18:09:32,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126197131] [2024-10-11 18:09:32,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:09:32,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 18:09:32,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:32,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 18:09:32,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:09:32,890 INFO L87 Difference]: Start difference. First operand 164 states and 229 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-11 18:09:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:33,161 INFO L93 Difference]: Finished difference Result 184 states and 255 transitions. [2024-10-11 18:09:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 18:09:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2024-10-11 18:09:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:33,163 INFO L225 Difference]: With dead ends: 184 [2024-10-11 18:09:33,163 INFO L226 Difference]: Without dead ends: 184 [2024-10-11 18:09:33,163 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:09:33,164 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 46 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:33,164 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 431 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 18:09:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-10-11 18:09:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 165. [2024-10-11 18:09:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 101 states have (on average 1.7326732673267327) internal successors, (175), 131 states have internal predecessors, (175), 22 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (31), 28 states have call predecessors, (31), 22 states have call successors, (31) [2024-10-11 18:09:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 228 transitions. [2024-10-11 18:09:33,177 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 228 transitions. Word has length 37 [2024-10-11 18:09:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:33,177 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 228 transitions. [2024-10-11 18:09:33,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-11 18:09:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 228 transitions. [2024-10-11 18:09:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 18:09:33,178 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:33,179 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:33,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 18:09:33,179 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:33,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash 374369863, now seen corresponding path program 2 times [2024-10-11 18:09:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:33,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241242658] [2024-10-11 18:09:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:33,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:33,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 18:09:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:34,107 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:34,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 18:09:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:34,376 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 18:09:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 18:09:34,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:09:34,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241242658] [2024-10-11 18:09:34,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241242658] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:34,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275338457] [2024-10-11 18:09:34,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:09:34,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:34,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:09:34,947 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:09:34,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 18:09:35,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 18:09:35,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:09:35,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-11 18:09:35,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:09:35,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 18:09:35,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 18:09:35,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-10-11 18:09:35,355 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-10-11 18:09:35,375 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((v_create_internal_~now~0.base_28 Int) (v_DerPreprocessor_8 Int)) (let ((.cse0 (store |c_old(#valid)| v_create_internal_~now~0.base_28 1))) (and (= (select (store .cse0 c_create_internal_~now~0.base v_DerPreprocessor_8) v_create_internal_~now~0.base_28) 1) (= |c_#valid| (store .cse0 c_create_internal_~now~0.base 1))))) (exists ((v_create_internal_~now~0.base_28 Int) (alloc_and_zero_internal_~pi~1.base Int)) (let ((.cse1 (store (store |c_old(#valid)| v_create_internal_~now~0.base_28 1) c_create_internal_~now~0.base (select |c_#valid| c_create_internal_~now~0.base)))) (and (= (select .cse1 v_create_internal_~now~0.base_28) 1) (= |c_#valid| (store .cse1 alloc_and_zero_internal_~pi~1.base 1)) (not (= alloc_and_zero_internal_~pi~1.base c_create_internal_~now~0.base)))))) is different from true [2024-10-11 18:09:35,598 INFO L349 Elim1Store]: treesize reduction 137, result has 16.0 percent of original size [2024-10-11 18:09:35,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 92 [2024-10-11 18:09:35,627 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 18:09:35,628 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 18:09:35,629 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 18:09:35,630 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 18:09:35,647 INFO L349 Elim1Store]: treesize reduction 189, result has 0.5 percent of original size [2024-10-11 18:09:35,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 10 [2024-10-11 18:09:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 5 not checked. [2024-10-11 18:09:35,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:09:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275338457] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:09:36,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:09:36,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2024-10-11 18:09:36,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424207692] [2024-10-11 18:09:36,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:09:36,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-11 18:09:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:09:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-11 18:09:36,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=645, Unknown=6, NotChecked=110, Total=930 [2024-10-11 18:09:36,033 INFO L87 Difference]: Start difference. First operand 165 states and 228 transitions. Second operand has 28 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-11 18:09:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:09:38,561 INFO L93 Difference]: Finished difference Result 209 states and 307 transitions. [2024-10-11 18:09:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 18:09:38,562 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 35 [2024-10-11 18:09:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:09:38,564 INFO L225 Difference]: With dead ends: 209 [2024-10-11 18:09:38,564 INFO L226 Difference]: Without dead ends: 209 [2024-10-11 18:09:38,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=321, Invalid=1087, Unknown=6, NotChecked=146, Total=1560 [2024-10-11 18:09:38,565 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 103 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-11 18:09:38,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 543 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1278 Invalid, 0 Unknown, 393 Unchecked, 1.6s Time] [2024-10-11 18:09:38,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-10-11 18:09:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 173. [2024-10-11 18:09:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 107 states have (on average 1.7102803738317758) internal successors, (183), 137 states have internal predecessors, (183), 23 states have call successors, (23), 5 states have call predecessors, (23), 7 states have return successors, (41), 30 states have call predecessors, (41), 23 states have call successors, (41) [2024-10-11 18:09:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 247 transitions. [2024-10-11 18:09:38,574 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 247 transitions. Word has length 35 [2024-10-11 18:09:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:09:38,574 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 247 transitions. [2024-10-11 18:09:38,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-11 18:09:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 247 transitions. [2024-10-11 18:09:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 18:09:38,575 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:09:38,576 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:09:38,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 18:09:38,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:09:38,777 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 18:09:38,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:09:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash 374369864, now seen corresponding path program 2 times [2024-10-11 18:09:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:09:38,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787487361] [2024-10-11 18:09:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:09:38,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:09:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:39,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:09:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:39,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 18:09:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:39,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-11 18:09:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:39,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 18:09:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:09:40,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 18:09:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat