./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/array-examples/standard_strcpy_original-1.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-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 32bit --witnessprinter.graph.data.programhash 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 17:44:53,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 17:44:53,148 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 17:44:53,155 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 17:44:53,155 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 17:44:53,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 17:44:53,185 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 17:44:53,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 17:44:53,186 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 17:44:53,187 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 17:44:53,187 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 17:44:53,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 17:44:53,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 17:44:53,189 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 17:44:53,189 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 17:44:53,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 17:44:53,190 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 17:44:53,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 17:44:53,190 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 17:44:53,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 17:44:53,191 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 17:44:53,191 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 17:44:53,192 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 17:44:53,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 17:44:53,192 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 17:44:53,193 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 17:44:53,193 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 17:44:53,193 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 17:44:53,193 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 17:44:53,194 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 17:44:53,194 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 17:44:53,194 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 17:44:53,195 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 17:44:53,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:44:53,195 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 17:44:53,196 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 17:44:53,196 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 17:44:53,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 17:44:53,196 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 17:44:53,196 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 17:44:53,197 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 17:44:53,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 17:44:53,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2024-10-11 17:44:53,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 17:44:53,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 17:44:53,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 17:44:53,481 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 17:44:53,481 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 17:44:53,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2024-10-11 17:44:54,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 17:44:55,067 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 17:44:55,068 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2024-10-11 17:44:55,076 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4b643509a/710673a41db643bca8121d59b569ed54/FLAGaa05f514c [2024-10-11 17:44:55,095 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4b643509a/710673a41db643bca8121d59b569ed54 [2024-10-11 17:44:55,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 17:44:55,100 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 17:44:55,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 17:44:55,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 17:44:55,107 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 17:44:55,108 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,109 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@279cf49e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55, skipping insertion in model container [2024-10-11 17:44:55,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,133 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 17:44:55,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:44:55,344 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 17:44:55,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:44:55,372 INFO L204 MainTranslator]: Completed translation [2024-10-11 17:44:55,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55 WrapperNode [2024-10-11 17:44:55,373 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 17:44:55,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 17:44:55,374 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 17:44:55,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 17:44:55,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,409 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2024-10-11 17:44:55,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 17:44:55,410 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 17:44:55,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 17:44:55,414 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 17:44:55,422 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,424 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,437 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 2, 5]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-11 17:44:55,437 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,437 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,448 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,449 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,452 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 17:44:55,453 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 17:44:55,453 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 17:44:55,453 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 17:44:55,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (1/1) ... [2024-10-11 17:44:55,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:44:55,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:44:55,485 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 17:44:55,487 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 17:44:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 17:44:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 17:44:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 17:44:55,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 17:44:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 17:44:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 17:44:55,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 17:44:55,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 17:44:55,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 17:44:55,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 17:44:55,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 17:44:55,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 17:44:55,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 17:44:55,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 17:44:55,604 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 17:44:55,606 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 17:44:55,786 INFO L? ?]: Removed 40 outVars from TransFormulas that were not future-live. [2024-10-11 17:44:55,787 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 17:44:55,832 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 17:44:55,833 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 17:44:55,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:44:55 BoogieIcfgContainer [2024-10-11 17:44:55,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 17:44:55,834 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 17:44:55,835 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 17:44:55,838 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 17:44:55,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 05:44:55" (1/3) ... [2024-10-11 17:44:55,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a304ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:44:55, skipping insertion in model container [2024-10-11 17:44:55,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:44:55" (2/3) ... [2024-10-11 17:44:55,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a304ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:44:55, skipping insertion in model container [2024-10-11 17:44:55,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:44:55" (3/3) ... [2024-10-11 17:44:55,841 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2024-10-11 17:44:55,858 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 17:44:55,859 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-10-11 17:44:55,906 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 17:44:55,911 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;@40414a30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 17:44:55,911 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-10-11 17:44:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 20 states have (on average 2.2) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-11 17:44:55,920 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:44:55,921 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-11 17:44:55,921 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:44:55,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:44:55,925 INFO L85 PathProgramCache]: Analyzing trace with hash 116603, now seen corresponding path program 1 times [2024-10-11 17:44:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:44:55,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851681670] [2024-10-11 17:44:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:44:55,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:44:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:44:56,252 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 17:44:56,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:44:56,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851681670] [2024-10-11 17:44:56,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851681670] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:44:56,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:44:56,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 17:44:56,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747881330] [2024-10-11 17:44:56,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:44:56,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:44:56,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:44:56,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:44:56,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:44:56,285 INFO L87 Difference]: Start difference. First operand has 37 states, 20 states have (on average 2.2) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:44:56,347 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2024-10-11 17:44:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:44:56,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-10-11 17:44:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:44:56,356 INFO L225 Difference]: With dead ends: 31 [2024-10-11 17:44:56,357 INFO L226 Difference]: Without dead ends: 30 [2024-10-11 17:44:56,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 17:44:56,362 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:44:56,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:44:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-11 17:44:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-11 17:44:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-10-11 17:44:56,392 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 3 [2024-10-11 17:44:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:44:56,392 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-10-11 17:44:56,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-10-11 17:44:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-11 17:44:56,393 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:44:56,394 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-11 17:44:56,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 17:44:56,394 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:44:56,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:44:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash 116604, now seen corresponding path program 1 times [2024-10-11 17:44:56,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:44:56,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753947205] [2024-10-11 17:44:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:44:56,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:44:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:44:56,696 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 17:44:56,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:44:56,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753947205] [2024-10-11 17:44:56,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753947205] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:44:56,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:44:56,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 17:44:56,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986272779] [2024-10-11 17:44:56,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:44:56,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:44:56,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:44:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:44:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:44:56,703 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:44:56,760 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-10-11 17:44:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:44:56,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-10-11 17:44:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:44:56,762 INFO L225 Difference]: With dead ends: 32 [2024-10-11 17:44:56,763 INFO L226 Difference]: Without dead ends: 32 [2024-10-11 17:44:56,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 17:44:56,766 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:44:56,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:44:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-11 17:44:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-11 17:44:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.619047619047619) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-10-11 17:44:56,773 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 3 [2024-10-11 17:44:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:44:56,774 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-10-11 17:44:56,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-10-11 17:44:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 17:44:56,775 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:44:56,775 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-10-11 17:44:56,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 17:44:56,775 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:44:56,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:44:56,778 INFO L85 PathProgramCache]: Analyzing trace with hash 112134608, now seen corresponding path program 1 times [2024-10-11 17:44:56,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:44:56,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316827682] [2024-10-11 17:44:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:44:56,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:44:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:44:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:56,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:44:56,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316827682] [2024-10-11 17:44:56,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316827682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:44:56,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852902900] [2024-10-11 17:44:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:44:56,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:44:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:44:56,948 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 17:44:56,949 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 17:44:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:44:57,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 17:44:57,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:44:57,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:44:57,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:44:57,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-10-11 17:44:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:57,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:44:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852902900] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:44:57,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:44:57,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-11 17:44:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577221140] [2024-10-11 17:44:57,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:44:57,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 17:44:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:44:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 17:44:57,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-11 17:44:57,242 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:44:57,357 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2024-10-11 17:44:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:44:57,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-11 17:44:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:44:57,358 INFO L225 Difference]: With dead ends: 36 [2024-10-11 17:44:57,359 INFO L226 Difference]: Without dead ends: 36 [2024-10-11 17:44:57,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-10-11 17:44:57,360 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:44:57,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:44:57,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-11 17:44:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-11 17:44:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-10-11 17:44:57,365 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 5 [2024-10-11 17:44:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:44:57,365 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-10-11 17:44:57,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-10-11 17:44:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 17:44:57,366 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:44:57,366 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-11 17:44:57,384 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 17:44:57,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:44:57,567 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:44:57,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:44:57,568 INFO L85 PathProgramCache]: Analyzing trace with hash -880027954, now seen corresponding path program 1 times [2024-10-11 17:44:57,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:44:57,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3934715] [2024-10-11 17:44:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:44:57,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:44:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:44:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:44:57,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:44:57,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3934715] [2024-10-11 17:44:57,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3934715] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:44:57,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924375994] [2024-10-11 17:44:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:44:57,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:44:57,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:44:57,684 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 17:44:57,686 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 17:44:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:44:57,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 17:44:57,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:44:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:57,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:44:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:57,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924375994] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:44:57,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:44:57,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2024-10-11 17:44:57,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64904982] [2024-10-11 17:44:57,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:44:57,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 17:44:57,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:44:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 17:44:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-10-11 17:44:57,818 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:44:58,070 INFO L93 Difference]: Finished difference Result 153 states and 184 transitions. [2024-10-11 17:44:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 17:44:58,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 17:44:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:44:58,073 INFO L225 Difference]: With dead ends: 153 [2024-10-11 17:44:58,074 INFO L226 Difference]: Without dead ends: 153 [2024-10-11 17:44:58,074 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2024-10-11 17:44:58,075 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 280 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:44:58,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 94 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:44:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-11 17:44:58,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 41. [2024-10-11 17:44:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.375) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:58,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-10-11 17:44:58,096 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 8 [2024-10-11 17:44:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:44:58,096 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-10-11 17:44:58,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-10-11 17:44:58,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 17:44:58,097 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:44:58,097 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2024-10-11 17:44:58,114 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 17:44:58,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:44:58,302 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:44:58,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:44:58,303 INFO L85 PathProgramCache]: Analyzing trace with hash -307219764, now seen corresponding path program 2 times [2024-10-11 17:44:58,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:44:58,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125785404] [2024-10-11 17:44:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:44:58,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:44:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:44:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:58,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:44:58,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125785404] [2024-10-11 17:44:58,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125785404] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:44:58,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417528551] [2024-10-11 17:44:58,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:44:58,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:44:58,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:44:58,533 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 17:44:58,534 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 17:44:58,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:44:58,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:44:58,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 17:44:58,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:44:58,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:44:58,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:44:58,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-10-11 17:44:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:58,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:44:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:58,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417528551] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:44:58,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:44:58,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-10-11 17:44:58,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290413286] [2024-10-11 17:44:58,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:44:58,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 17:44:58,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:44:58,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 17:44:58,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2024-10-11 17:44:58,886 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:59,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:44:59,101 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2024-10-11 17:44:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 17:44:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-11 17:44:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:44:59,107 INFO L225 Difference]: With dead ends: 50 [2024-10-11 17:44:59,107 INFO L226 Difference]: Without dead ends: 50 [2024-10-11 17:44:59,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2024-10-11 17:44:59,108 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:44:59,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 68 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:44:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-11 17:44:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-11 17:44:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2024-10-11 17:44:59,113 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 11 [2024-10-11 17:44:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:44:59,113 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2024-10-11 17:44:59,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2024-10-11 17:44:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 17:44:59,114 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:44:59,114 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:44:59,140 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 17:44:59,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:44:59,324 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:44:59,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:44:59,325 INFO L85 PathProgramCache]: Analyzing trace with hash 900709704, now seen corresponding path program 1 times [2024-10-11 17:44:59,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:44:59,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408863698] [2024-10-11 17:44:59,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:44:59,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:44:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:44:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-11 17:44:59,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:44:59,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408863698] [2024-10-11 17:44:59,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408863698] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:44:59,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:44:59,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 17:44:59,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538895457] [2024-10-11 17:44:59,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:44:59,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:44:59,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:44:59,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:44:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:44:59,377 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:44:59,401 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2024-10-11 17:44:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:44:59,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-11 17:44:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:44:59,403 INFO L225 Difference]: With dead ends: 48 [2024-10-11 17:44:59,403 INFO L226 Difference]: Without dead ends: 48 [2024-10-11 17:44:59,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 17:44:59,404 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:44:59,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:44:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-11 17:44:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-11 17:44:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2024-10-11 17:44:59,408 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 19 [2024-10-11 17:44:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:44:59,408 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2024-10-11 17:44:59,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:44:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2024-10-11 17:44:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 17:44:59,409 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:44:59,409 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:44:59,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 17:44:59,410 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:44:59,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:44:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash 900709705, now seen corresponding path program 1 times [2024-10-11 17:44:59,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:44:59,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112085475] [2024-10-11 17:44:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:44:59,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:44:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:44:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:59,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:44:59,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112085475] [2024-10-11 17:44:59,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112085475] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:44:59,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21986172] [2024-10-11 17:44:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:44:59,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:44:59,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:44:59,517 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 17:44:59,518 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 17:44:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:44:59,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 17:44:59,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:44:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:59,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:44:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:44:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21986172] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:44:59,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:44:59,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-10-11 17:44:59,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223463588] [2024-10-11 17:44:59,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:44:59,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 17:44:59,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:44:59,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 17:44:59,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:44:59,723 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:00,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:00,029 INFO L93 Difference]: Finished difference Result 291 states and 364 transitions. [2024-10-11 17:45:00,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 17:45:00,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-11 17:45:00,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:00,031 INFO L225 Difference]: With dead ends: 291 [2024-10-11 17:45:00,031 INFO L226 Difference]: Without dead ends: 291 [2024-10-11 17:45:00,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:45:00,032 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 647 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:00,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 138 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:45:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-10-11 17:45:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 55. [2024-10-11 17:45:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.25) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-10-11 17:45:00,050 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 19 [2024-10-11 17:45:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:00,050 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-10-11 17:45:00,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-10-11 17:45:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-11 17:45:00,051 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:00,051 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 1, 1] [2024-10-11 17:45:00,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 17:45:00,252 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,SelfDestructingSolverStorable6 [2024-10-11 17:45:00,253 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:45:00,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:00,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1957347900, now seen corresponding path program 3 times [2024-10-11 17:45:00,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:00,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286016202] [2024-10-11 17:45:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:00,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:00,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:00,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286016202] [2024-10-11 17:45:00,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286016202] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:00,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352310219] [2024-10-11 17:45:00,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:45:00,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:00,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:00,646 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 17:45:00,648 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 17:45:00,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 17:45:00,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:00,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 17:45:00,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:00,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:45:00,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:45:00,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-10-11 17:45:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-11 17:45:00,881 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:45:00,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352310219] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:00,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:45:00,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 14 [2024-10-11 17:45:00,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723525136] [2024-10-11 17:45:00,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:00,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:45:00,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:00,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:45:00,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-10-11 17:45:00,884 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:00,926 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2024-10-11 17:45:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:45:00,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-11 17:45:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:00,928 INFO L225 Difference]: With dead ends: 54 [2024-10-11 17:45:00,928 INFO L226 Difference]: Without dead ends: 54 [2024-10-11 17:45:00,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-10-11 17:45:00,929 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:00,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-11 17:45:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-11 17:45:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2024-10-11 17:45:00,936 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 23 [2024-10-11 17:45:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:00,936 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2024-10-11 17:45:00,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2024-10-11 17:45:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 17:45:00,937 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:00,938 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:00,956 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 17:45:01,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:01,139 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:45:01,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash -13433879, now seen corresponding path program 2 times [2024-10-11 17:45:01,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:01,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249108994] [2024-10-11 17:45:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:01,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:01,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249108994] [2024-10-11 17:45:01,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249108994] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:01,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342003738] [2024-10-11 17:45:01,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:45:01,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:01,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:01,467 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 17:45:01,469 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 17:45:01,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 17:45:01,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:01,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 17:45:01,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:01,549 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 17:45:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-10-11 17:45:01,690 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:45:01,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342003738] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:01,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:45:01,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [16] total 18 [2024-10-11 17:45:01,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695296667] [2024-10-11 17:45:01,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:01,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:45:01,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:45:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2024-10-11 17:45:01,693 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:01,732 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-10-11 17:45:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:45:01,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-11 17:45:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:01,733 INFO L225 Difference]: With dead ends: 67 [2024-10-11 17:45:01,733 INFO L226 Difference]: Without dead ends: 67 [2024-10-11 17:45:01,734 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2024-10-11 17:45:01,735 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:01,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-11 17:45:01,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2024-10-11 17:45:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2024-10-11 17:45:01,740 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 35 [2024-10-11 17:45:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:01,741 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2024-10-11 17:45:01,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2024-10-11 17:45:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-11 17:45:01,741 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:01,742 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:01,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 17:45:01,942 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,SelfDestructingSolverStorable8 [2024-10-11 17:45:01,942 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:45:01,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:01,943 INFO L85 PathProgramCache]: Analyzing trace with hash -416448548, now seen corresponding path program 1 times [2024-10-11 17:45:01,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:01,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710535333] [2024-10-11 17:45:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:01,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:45:02,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:02,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710535333] [2024-10-11 17:45:02,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710535333] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:02,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856192138] [2024-10-11 17:45:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:02,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:02,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:02,289 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 17:45:02,290 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 17:45:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:02,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 17:45:02,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:45:02,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:45:02,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856192138] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:02,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:02,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-10-11 17:45:02,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080989386] [2024-10-11 17:45:02,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:02,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 17:45:02,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:02,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 17:45:02,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 17:45:02,812 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:03,487 INFO L93 Difference]: Finished difference Result 594 states and 742 transitions. [2024-10-11 17:45:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-11 17:45:03,487 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-11 17:45:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:03,492 INFO L225 Difference]: With dead ends: 594 [2024-10-11 17:45:03,493 INFO L226 Difference]: Without dead ends: 594 [2024-10-11 17:45:03,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 17:45:03,494 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 1277 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:03,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 291 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:45:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2024-10-11 17:45:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 91. [2024-10-11 17:45:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 90 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2024-10-11 17:45:03,509 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 36 [2024-10-11 17:45:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:03,509 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2024-10-11 17:45:03,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2024-10-11 17:45:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-11 17:45:03,511 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:03,511 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:03,528 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 17:45:03,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:03,712 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:45:03,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1231313564, now seen corresponding path program 2 times [2024-10-11 17:45:03,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:03,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67553798] [2024-10-11 17:45:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:03,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:45:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:04,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67553798] [2024-10-11 17:45:04,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67553798] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:04,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124547075] [2024-10-11 17:45:04,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:45:04,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:04,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:04,697 INFO L229 MonitoredProcess]: Starting monitored process 9 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 17:45:04,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 17:45:04,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:45:04,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:04,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-11 17:45:04,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:45:04,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:45:06,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124547075] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:06,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:06,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2024-10-11 17:45:06,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769885994] [2024-10-11 17:45:06,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:06,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-10-11 17:45:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:06,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-10-11 17:45:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-10-11 17:45:06,212 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:08,384 INFO L93 Difference]: Finished difference Result 1202 states and 1510 transitions. [2024-10-11 17:45:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-11 17:45:08,385 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-10-11 17:45:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:08,388 INFO L225 Difference]: With dead ends: 1202 [2024-10-11 17:45:08,388 INFO L226 Difference]: Without dead ends: 1202 [2024-10-11 17:45:08,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-10-11 17:45:08,390 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 3257 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3257 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:08,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3257 Valid, 570 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-11 17:45:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2024-10-11 17:45:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 155. [2024-10-11 17:45:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 149 states have (on average 1.0671140939597314) internal successors, (159), 154 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2024-10-11 17:45:08,400 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 68 [2024-10-11 17:45:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:08,400 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2024-10-11 17:45:08,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2024-10-11 17:45:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-10-11 17:45:08,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:08,402 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:08,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 17:45:08,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 17:45:08,603 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:45:08,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:08,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2038501404, now seen corresponding path program 3 times [2024-10-11 17:45:08,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:08,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969811364] [2024-10-11 17:45:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:08,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:45:11,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969811364] [2024-10-11 17:45:11,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969811364] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709956739] [2024-10-11 17:45:11,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:45:11,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:11,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:11,894 INFO L229 MonitoredProcess]: Starting monitored process 10 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 17:45:11,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 17:45:12,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 17:45:12,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:12,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 17:45:12,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2024-10-11 17:45:12,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:12,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:45:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2024-10-11 17:45:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709956739] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:12,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:12,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 5, 5] total 74 [2024-10-11 17:45:12,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457755052] [2024-10-11 17:45:12,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:12,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-10-11 17:45:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-10-11 17:45:12,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2314, Invalid=3236, Unknown=0, NotChecked=0, Total=5550 [2024-10-11 17:45:12,688 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:18,171 INFO L93 Difference]: Finished difference Result 1243 states and 1438 transitions. [2024-10-11 17:45:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-10-11 17:45:18,171 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2024-10-11 17:45:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:18,176 INFO L225 Difference]: With dead ends: 1243 [2024-10-11 17:45:18,176 INFO L226 Difference]: Without dead ends: 1243 [2024-10-11 17:45:18,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2855 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6986, Invalid=12196, Unknown=0, NotChecked=0, Total=19182 [2024-10-11 17:45:18,181 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 9144 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 1429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9144 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 2235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1429 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:18,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9144 Valid, 549 Invalid, 2235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1429 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-11 17:45:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2024-10-11 17:45:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 792. [2024-10-11 17:45:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 786 states have (on average 1.4147582697201018) internal successors, (1112), 791 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1112 transitions. [2024-10-11 17:45:18,202 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1112 transitions. Word has length 132 [2024-10-11 17:45:18,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:18,203 INFO L471 AbstractCegarLoop]: Abstraction has 792 states and 1112 transitions. [2024-10-11 17:45:18,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:18,203 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1112 transitions. [2024-10-11 17:45:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-10-11 17:45:18,205 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:18,205 INFO L215 NwaCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:18,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 17:45:18,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:18,406 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:45:18,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1276638244, now seen corresponding path program 1 times [2024-10-11 17:45:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:18,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975391232] [2024-10-11 17:45:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:21,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:21,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975391232] [2024-10-11 17:45:21,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975391232] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:21,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984488196] [2024-10-11 17:45:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:21,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:21,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:21,175 INFO L229 MonitoredProcess]: Starting monitored process 11 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 17:45:21,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 17:45:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:21,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-11 17:45:21,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:21,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:25,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984488196] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:25,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:25,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2024-10-11 17:45:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040550397] [2024-10-11 17:45:25,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:25,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-10-11 17:45:25,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-10-11 17:45:25,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2024-10-11 17:45:25,608 INFO L87 Difference]: Start difference. First operand 792 states and 1112 transitions. Second operand has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:42,652 INFO L93 Difference]: Finished difference Result 2456 states and 2966 transitions. [2024-10-11 17:45:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2024-10-11 17:45:42,653 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2024-10-11 17:45:42,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:42,659 INFO L225 Difference]: With dead ends: 2456 [2024-10-11 17:45:42,659 INFO L226 Difference]: Without dead ends: 2456 [2024-10-11 17:45:42,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2024-10-11 17:45:42,663 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8732 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 2190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8732 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 3519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2190 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:42,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8732 Valid, 1173 Invalid, 3519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2190 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-10-11 17:45:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2024-10-11 17:45:42,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 922. [2024-10-11 17:45:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 916 states have (on average 1.3558951965065502) internal successors, (1242), 921 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1242 transitions. [2024-10-11 17:45:42,683 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1242 transitions. Word has length 136 [2024-10-11 17:45:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:42,683 INFO L471 AbstractCegarLoop]: Abstraction has 922 states and 1242 transitions. [2024-10-11 17:45:42,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1242 transitions. [2024-10-11 17:45:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2024-10-11 17:45:42,687 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:42,687 INFO L215 NwaCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:42,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 17:45:42,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 17:45:42,888 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:45:42,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1338668792, now seen corresponding path program 2 times [2024-10-11 17:45:42,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:42,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865566277] [2024-10-11 17:45:42,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:42,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:52,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:52,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865566277] [2024-10-11 17:45:52,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865566277] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:52,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819981853] [2024-10-11 17:45:52,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:45:52,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:52,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:52,504 INFO L229 MonitoredProcess]: Starting monitored process 12 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 17:45:52,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 17:45:52,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 17:45:52,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:52,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 17:45:52,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:54,150 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_31| Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_18| Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_31| 1) |v_ULTIMATE.start_main_~#dst~0#1.base_18|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_31| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_18| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_31|) 0))) is different from true [2024-10-11 17:45:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16384 trivial. 0 not checked. [2024-10-11 17:45:54,155 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:45:54,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819981853] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:54,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:45:54,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [130] total 132 [2024-10-11 17:45:54,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329577281] [2024-10-11 17:45:54,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:54,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:45:54,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:54,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:45:54,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8519, Invalid=8776, Unknown=1, NotChecked=260, Total=17556 [2024-10-11 17:45:54,158 INFO L87 Difference]: Start difference. First operand 922 states and 1242 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:54,191 INFO L93 Difference]: Finished difference Result 921 states and 1241 transitions. [2024-10-11 17:45:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:45:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2024-10-11 17:45:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:54,194 INFO L225 Difference]: With dead ends: 921 [2024-10-11 17:45:54,194 INFO L226 Difference]: Without dead ends: 919 [2024-10-11 17:45:54,196 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8519, Invalid=8776, Unknown=1, NotChecked=260, Total=17556 [2024-10-11 17:45:54,197 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:54,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 12 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2024-10-11 17:45:54,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2024-10-11 17:45:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2024-10-11 17:45:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 914 states have (on average 1.285557986870897) internal successors, (1175), 918 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1175 transitions. [2024-10-11 17:45:54,211 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1175 transitions. Word has length 266 [2024-10-11 17:45:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:54,212 INFO L471 AbstractCegarLoop]: Abstraction has 919 states and 1175 transitions. [2024-10-11 17:45:54,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1175 transitions. [2024-10-11 17:45:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2024-10-11 17:45:54,215 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:54,215 INFO L215 NwaCegarLoop]: trace histogram [128, 128, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 17:45:54,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 17:45:54,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 17:45:54,417 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-11 17:45:54,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1315561837, now seen corresponding path program 1 times [2024-10-11 17:45:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:54,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68514068] [2024-10-11 17:45:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:54,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16388 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:46:03,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:03,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68514068] [2024-10-11 17:46:03,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68514068] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:03,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873762732] [2024-10-11 17:46:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:03,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:03,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:03,657 INFO L229 MonitoredProcess]: Starting monitored process 13 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 17:46:03,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 17:46:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:04,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-10-11 17:46:04,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16388 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:46:04,271 INFO L311 TraceCheckSpWp]: Computing backward predicates...