./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0234-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0234-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --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 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:55:50,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:55:50,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:55:50,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:55:50,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:55:50,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:55:50,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:55:50,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:55:50,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:55:50,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:55:50,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:55:50,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:55:50,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:55:50,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:55:50,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:55:50,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:55:50,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:55:50,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:55:50,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:55:50,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:55:50,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:55:50,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:55:50,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:55:50,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:55:50,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:55:50,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:55:50,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:55:50,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:55:50,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:55:50,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:55:50,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:55:50,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:55:50,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:55:50,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:55:50,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:55:50,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:55:50,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:55:50,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:55:50,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:55:50,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:55:50,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:55:50,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 12:55:50,343 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:55:50,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:55:50,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:55:50,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:55:50,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:55:50,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:55:50,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:55:50,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:55:50,348 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:55:50,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:55:50,349 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:55:50,349 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 12:55:50,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:55:50,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:55:50,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:55:50,349 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 12:55:50,350 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 12:55:50,350 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 12:55:50,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:55:50,350 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 12:55:50,350 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:55:50,350 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:55:50,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:55:50,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:55:50,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:55:50,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:55:50,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:55:50,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:55:50,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:55:50,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:55:50,352 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:55:50,352 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:55:50,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:55:50,353 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:55:50,353 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2023-02-15 12:55:50,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:55:50,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:55:50,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:55:50,585 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:55:50,585 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:55:50,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0234-2.i [2023-02-15 12:55:51,786 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:55:52,023 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:55:52,023 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0234-2.i [2023-02-15 12:55:52,044 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f49ac8ba/63c8bd4340da400d892f356c00231d96/FLAG127a6febc [2023-02-15 12:55:52,057 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f49ac8ba/63c8bd4340da400d892f356c00231d96 [2023-02-15 12:55:52,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:55:52,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:55:52,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:55:52,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:55:52,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:55:52,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df3cadc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52, skipping insertion in model container [2023-02-15 12:55:52,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:55:52,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:55:52,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:55:52,436 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:55:52,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:55:52,519 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:55:52,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52 WrapperNode [2023-02-15 12:55:52,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:55:52,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:55:52,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:55:52,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:55:52,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,596 INFO L138 Inliner]: procedures = 188, calls = 58, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 197 [2023-02-15 12:55:52,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:55:52,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:55:52,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:55:52,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:55:52,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,647 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:55:52,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:55:52,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:55:52,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:55:52,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (1/1) ... [2023-02-15 12:55:52,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:55:52,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:55:52,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 12:55:52,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 12:55:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 12:55:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:55:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 12:55:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 12:55:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-02-15 12:55:52,721 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-02-15 12:55:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 12:55:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 12:55:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:55:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:55:52,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:55:52,894 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:55:52,896 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:55:53,355 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:55:53,361 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:55:53,362 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2023-02-15 12:55:53,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:55:53 BoogieIcfgContainer [2023-02-15 12:55:53,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:55:53,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:55:53,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:55:53,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:55:53,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:55:52" (1/3) ... [2023-02-15 12:55:53,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80b0a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:55:53, skipping insertion in model container [2023-02-15 12:55:53,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:52" (2/3) ... [2023-02-15 12:55:53,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80b0a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:55:53, skipping insertion in model container [2023-02-15 12:55:53,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:55:53" (3/3) ... [2023-02-15 12:55:53,374 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2023-02-15 12:55:53,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:55:53,387 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2023-02-15 12:55:53,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:55:53,430 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@64b74a43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:55:53,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2023-02-15 12:55:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 104 states have (on average 1.8846153846153846) internal successors, (196), 174 states have internal predecessors, (196), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:55:53,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 12:55:53,439 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:55:53,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 12:55:53,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:55:53,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:55:53,445 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2023-02-15 12:55:53,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:55:53,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353338856] [2023-02-15 12:55:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:53,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:55:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:55:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:55:53,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:55:53,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353338856] [2023-02-15 12:55:53,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353338856] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:55:53,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:55:53,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:55:53,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324607222] [2023-02-15 12:55:53,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:55:53,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 12:55:53,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:55:53,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 12:55:53,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:55:53,638 INFO L87 Difference]: Start difference. First operand has 182 states, 104 states have (on average 1.8846153846153846) internal successors, (196), 174 states have internal predecessors, (196), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-02-15 12:55:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:55:53,664 INFO L93 Difference]: Finished difference Result 182 states and 197 transitions. [2023-02-15 12:55:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 12:55:53,666 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2023-02-15 12:55:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:55:53,672 INFO L225 Difference]: With dead ends: 182 [2023-02-15 12:55:53,672 INFO L226 Difference]: Without dead ends: 180 [2023-02-15 12:55:53,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:55:53,677 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:55:53,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:55:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-02-15 12:55:53,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-02-15 12:55:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 103 states have (on average 1.7766990291262137) internal successors, (183), 172 states have internal predecessors, (183), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:55:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2023-02-15 12:55:53,719 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 4 [2023-02-15 12:55:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:55:53,719 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2023-02-15 12:55:53,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-02-15 12:55:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2023-02-15 12:55:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 12:55:53,720 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:55:53,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 12:55:53,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:55:53,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:55:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:55:53,722 INFO L85 PathProgramCache]: Analyzing trace with hash 889833681, now seen corresponding path program 1 times [2023-02-15 12:55:53,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:55:53,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363523916] [2023-02-15 12:55:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:53,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:55:53,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:55:53,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55390796] [2023-02-15 12:55:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:53,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:55:53,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:55:53,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:55:53,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:55:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:55:53,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 12:55:53,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:55:53,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:55:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:55:53,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:55:53,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:55:53,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363523916] [2023-02-15 12:55:53,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:55:53,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55390796] [2023-02-15 12:55:53,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55390796] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:55:53,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:55:53,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:55:53,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439179395] [2023-02-15 12:55:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:55:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 12:55:53,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:55:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 12:55:53,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:55:53,921 INFO L87 Difference]: Start difference. First operand 180 states and 195 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:55:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:55:54,072 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2023-02-15 12:55:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 12:55:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 12:55:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:55:54,082 INFO L225 Difference]: With dead ends: 179 [2023-02-15 12:55:54,082 INFO L226 Difference]: Without dead ends: 179 [2023-02-15 12:55:54,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:55:54,084 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 9 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:55:54,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 302 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:55:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-15 12:55:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-02-15 12:55:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 103 states have (on average 1.766990291262136) internal successors, (182), 171 states have internal predecessors, (182), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:55:54,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2023-02-15 12:55:54,097 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 6 [2023-02-15 12:55:54,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:55:54,097 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2023-02-15 12:55:54,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:55:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2023-02-15 12:55:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 12:55:54,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:55:54,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:55:54,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 12:55:54,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:55:54,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:55:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:55:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1815040656, now seen corresponding path program 1 times [2023-02-15 12:55:54,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:55:54,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176315760] [2023-02-15 12:55:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:54,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:55:54,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:55:54,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44840170] [2023-02-15 12:55:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:54,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:55:54,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:55:54,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:55:54,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:55:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:55:54,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 12:55:54,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:55:54,455 INFO L350 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 7 [2023-02-15 12:55:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:55:54,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:55:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:55:54,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176315760] [2023-02-15 12:55:54,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:55:54,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44840170] [2023-02-15 12:55:54,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44840170] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:55:54,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:55:54,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:55:54,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784515914] [2023-02-15 12:55:54,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:55:54,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:55:54,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:55:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:55:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:55:54,480 INFO L87 Difference]: Start difference. First operand 179 states and 194 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:55:54,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:55:54,618 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2023-02-15 12:55:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:55:54,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 12:55:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:55:54,619 INFO L225 Difference]: With dead ends: 188 [2023-02-15 12:55:54,620 INFO L226 Difference]: Without dead ends: 188 [2023-02-15 12:55:54,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:55:54,621 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 16 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:55:54,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 494 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:55:54,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-02-15 12:55:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-02-15 12:55:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 111 states have (on average 1.7207207207207207) internal successors, (191), 179 states have internal predecessors, (191), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:55:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2023-02-15 12:55:54,633 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 7 [2023-02-15 12:55:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:55:54,633 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2023-02-15 12:55:54,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:55:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2023-02-15 12:55:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 12:55:54,636 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:55:54,636 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:55:54,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 12:55:54,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 12:55:54,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:55:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:55:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1566187321, now seen corresponding path program 1 times [2023-02-15 12:55:54,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:55:54,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262359325] [2023-02-15 12:55:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:54,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:55:54,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:55:54,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788805086] [2023-02-15 12:55:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:54,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:55:54,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:55:54,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:55:54,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:55:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:55:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 12:55:55,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:55:55,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:55:55,199 INFO L350 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 15 treesize of output 11 [2023-02-15 12:55:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 12:55:55,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:55:55,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:55:55,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262359325] [2023-02-15 12:55:55,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:55:55,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788805086] [2023-02-15 12:55:55,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788805086] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:55:55,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:55:55,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:55:55,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492338179] [2023-02-15 12:55:55,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:55:55,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:55:55,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:55:55,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:55:55,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:55:55,391 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 12:55:57,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:55:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:55:58,787 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2023-02-15 12:55:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:55:58,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2023-02-15 12:55:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:55:58,789 INFO L225 Difference]: With dead ends: 200 [2023-02-15 12:55:58,789 INFO L226 Difference]: Without dead ends: 190 [2023-02-15 12:55:58,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:55:58,790 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 19 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:55:58,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 651 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-02-15 12:55:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-15 12:55:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-02-15 12:55:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 113 states have (on average 1.7079646017699115) internal successors, (193), 181 states have internal predecessors, (193), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:55:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 205 transitions. [2023-02-15 12:55:58,799 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 205 transitions. Word has length 66 [2023-02-15 12:55:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:55:58,799 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 205 transitions. [2023-02-15 12:55:58,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 12:55:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 205 transitions. [2023-02-15 12:55:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 12:55:58,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:55:58,802 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:55:58,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 12:55:59,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:55:59,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:55:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:55:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1361872350, now seen corresponding path program 1 times [2023-02-15 12:55:59,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:55:59,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535624497] [2023-02-15 12:55:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:59,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:55:59,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:55:59,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638568892] [2023-02-15 12:55:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:59,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:55:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:55:59,043 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:55:59,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:55:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:55:59,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 12:55:59,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:55:59,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:55:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-02-15 12:55:59,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:55:59,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:55:59,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535624497] [2023-02-15 12:55:59,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:55:59,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638568892] [2023-02-15 12:55:59,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638568892] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:55:59,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:55:59,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:55:59,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219950412] [2023-02-15 12:55:59,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:55:59,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:55:59,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:55:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:55:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:55:59,344 INFO L87 Difference]: Start difference. First operand 190 states and 205 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 12:55:59,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:55:59,444 INFO L93 Difference]: Finished difference Result 189 states and 204 transitions. [2023-02-15 12:55:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:55:59,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 71 [2023-02-15 12:55:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:55:59,447 INFO L225 Difference]: With dead ends: 189 [2023-02-15 12:55:59,447 INFO L226 Difference]: Without dead ends: 189 [2023-02-15 12:55:59,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:55:59,449 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 16 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:55:59,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 513 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:55:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-15 12:55:59,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-02-15 12:55:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 113 states have (on average 1.6991150442477876) internal successors, (192), 180 states have internal predecessors, (192), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:55:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 204 transitions. [2023-02-15 12:55:59,472 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 204 transitions. Word has length 71 [2023-02-15 12:55:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:55:59,473 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 204 transitions. [2023-02-15 12:55:59,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 12:55:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 204 transitions. [2023-02-15 12:55:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-15 12:55:59,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:55:59,475 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:55:59,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:55:59,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:55:59,683 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:55:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:55:59,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1029907146, now seen corresponding path program 1 times [2023-02-15 12:55:59,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:55:59,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050804530] [2023-02-15 12:55:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:59,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:55:59,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:55:59,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481940576] [2023-02-15 12:55:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:55:59,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:55:59,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:55:59,717 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:55:59,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:55:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:55:59,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 12:55:59,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:00,005 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_217 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_217))) is different from true [2023-02-15 12:56:00,097 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 12:56:00,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 12:56:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 1 not checked. [2023-02-15 12:56:00,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:00,332 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 12:56:00,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 12:56:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 11 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-15 12:56:00,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:00,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050804530] [2023-02-15 12:56:00,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:00,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481940576] [2023-02-15 12:56:00,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481940576] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:00,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:00,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-02-15 12:56:00,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422476980] [2023-02-15 12:56:00,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:00,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 12:56:00,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 12:56:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-02-15 12:56:00,353 INFO L87 Difference]: Start difference. First operand 189 states and 204 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 12:56:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:00,906 INFO L93 Difference]: Finished difference Result 227 states and 246 transitions. [2023-02-15 12:56:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 12:56:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2023-02-15 12:56:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:00,909 INFO L225 Difference]: With dead ends: 227 [2023-02-15 12:56:00,909 INFO L226 Difference]: Without dead ends: 227 [2023-02-15 12:56:00,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2023-02-15 12:56:00,910 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 126 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:00,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 1185 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 760 Invalid, 0 Unknown, 233 Unchecked, 0.4s Time] [2023-02-15 12:56:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-02-15 12:56:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 187. [2023-02-15 12:56:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 113 states have (on average 1.6814159292035398) internal successors, (190), 178 states have internal predecessors, (190), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:56:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 202 transitions. [2023-02-15 12:56:00,915 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 202 transitions. Word has length 79 [2023-02-15 12:56:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:00,915 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 202 transitions. [2023-02-15 12:56:00,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 12:56:00,916 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 202 transitions. [2023-02-15 12:56:00,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-15 12:56:00,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:00,917 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:56:00,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:01,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:01,118 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:56:01,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:01,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1029907147, now seen corresponding path program 1 times [2023-02-15 12:56:01,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:01,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31458721] [2023-02-15 12:56:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:01,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:01,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:01,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260722608] [2023-02-15 12:56:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:01,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:01,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:01,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:01,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:56:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 12:56:01,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:01,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:01,607 INFO L350 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 15 treesize of output 11 [2023-02-15 12:56:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 54 proven. 11 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-15 12:56:02,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-02-15 12:56:03,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:03,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31458721] [2023-02-15 12:56:03,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:03,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260722608] [2023-02-15 12:56:03,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260722608] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:03,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:03,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-02-15 12:56:03,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034115275] [2023-02-15 12:56:03,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:03,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:56:03,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:03,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:56:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:56:03,032 INFO L87 Difference]: Start difference. First operand 187 states and 202 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-15 12:56:06,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:06,276 INFO L93 Difference]: Finished difference Result 206 states and 222 transitions. [2023-02-15 12:56:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 12:56:06,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 79 [2023-02-15 12:56:06,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:06,278 INFO L225 Difference]: With dead ends: 206 [2023-02-15 12:56:06,278 INFO L226 Difference]: Without dead ends: 191 [2023-02-15 12:56:06,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2023-02-15 12:56:06,279 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 42 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:06,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1117 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-02-15 12:56:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-02-15 12:56:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-02-15 12:56:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 117 states have (on average 1.6581196581196582) internal successors, (194), 182 states have internal predecessors, (194), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:56:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2023-02-15 12:56:06,283 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 79 [2023-02-15 12:56:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:06,284 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2023-02-15 12:56:06,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-15 12:56:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2023-02-15 12:56:06,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 12:56:06,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:06,285 INFO L195 NwaCegarLoop]: trace histogram [14, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:56:06,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:06,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:06,486 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:56:06,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:06,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1077320971, now seen corresponding path program 2 times [2023-02-15 12:56:06,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:06,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328648879] [2023-02-15 12:56:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:06,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:06,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:06,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170642753] [2023-02-15 12:56:06,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:56:06,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:06,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:06,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:06,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:56:06,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:56:06,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:56:06,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 12:56:06,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:06,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:07,007 INFO L350 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 13 treesize of output 9 [2023-02-15 12:56:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-15 12:56:07,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-15 12:56:07,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:07,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328648879] [2023-02-15 12:56:07,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:07,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170642753] [2023-02-15 12:56:07,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170642753] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:07,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:07,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-15 12:56:07,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267569573] [2023-02-15 12:56:07,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:07,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 12:56:07,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:07,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 12:56:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:56:07,386 INFO L87 Difference]: Start difference. First operand 191 states and 206 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-15 12:56:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:08,217 INFO L93 Difference]: Finished difference Result 225 states and 244 transitions. [2023-02-15 12:56:08,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 12:56:08,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 87 [2023-02-15 12:56:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:08,218 INFO L225 Difference]: With dead ends: 225 [2023-02-15 12:56:08,218 INFO L226 Difference]: Without dead ends: 200 [2023-02-15 12:56:08,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 12:56:08,219 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 91 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:08,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1376 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:56:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-15 12:56:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-02-15 12:56:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 126 states have (on average 1.6111111111111112) internal successors, (203), 191 states have internal predecessors, (203), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:56:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 215 transitions. [2023-02-15 12:56:08,226 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 215 transitions. Word has length 87 [2023-02-15 12:56:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:08,226 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 215 transitions. [2023-02-15 12:56:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-15 12:56:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 215 transitions. [2023-02-15 12:56:08,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-15 12:56:08,233 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:08,233 INFO L195 NwaCegarLoop]: trace histogram [35, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:56:08,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:08,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:08,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:56:08,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:08,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2075783508, now seen corresponding path program 3 times [2023-02-15 12:56:08,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:08,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628616150] [2023-02-15 12:56:08,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:08,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:08,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:08,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951459024] [2023-02-15 12:56:08,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:56:08,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:08,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:08,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:08,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 12:56:10,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 12:56:10,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:56:10,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 12:56:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:10,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:10,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:10,239 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_961 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_961) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-15 12:56:10,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:56:10,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 12:56:10,319 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 12:56:10,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 12:56:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 73 not checked. [2023-02-15 12:56:10,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:16,507 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:56:16,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:16,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628616150] [2023-02-15 12:56:16,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:16,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951459024] [2023-02-15 12:56:16,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951459024] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:56:16,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:56:16,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-15 12:56:16,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343393867] [2023-02-15 12:56:16,509 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:16,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 12:56:16,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 12:56:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=130, Unknown=1, NotChecked=22, Total=182 [2023-02-15 12:56:16,510 INFO L87 Difference]: Start difference. First operand 200 states and 215 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:56:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:17,273 INFO L93 Difference]: Finished difference Result 244 states and 266 transitions. [2023-02-15 12:56:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 12:56:17,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 108 [2023-02-15 12:56:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:17,277 INFO L225 Difference]: With dead ends: 244 [2023-02-15 12:56:17,277 INFO L226 Difference]: Without dead ends: 244 [2023-02-15 12:56:17,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=64, Invalid=245, Unknown=1, NotChecked=32, Total=342 [2023-02-15 12:56:17,278 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 208 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:17,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 823 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 985 Invalid, 0 Unknown, 233 Unchecked, 0.6s Time] [2023-02-15 12:56:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-15 12:56:17,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 198. [2023-02-15 12:56:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 126 states have (on average 1.5952380952380953) internal successors, (201), 189 states have internal predecessors, (201), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:56:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2023-02-15 12:56:17,283 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 108 [2023-02-15 12:56:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:17,284 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2023-02-15 12:56:17,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:56:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2023-02-15 12:56:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-15 12:56:17,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:17,286 INFO L195 NwaCegarLoop]: trace histogram [35, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:56:17,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:17,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 12:56:17,494 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:56:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:17,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1963125108, now seen corresponding path program 1 times [2023-02-15 12:56:17,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:17,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162623149] [2023-02-15 12:56:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:17,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:17,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:17,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356256595] [2023-02-15 12:56:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:17,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:17,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:17,539 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:17,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 12:56:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:17,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 12:56:17,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:17,899 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1421 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1421))) is different from true [2023-02-15 12:56:17,971 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 12:56:17,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 12:56:17,990 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1422 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1422))) is different from true [2023-02-15 12:56:18,085 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 12:56:18,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 12:56:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 485 proven. 114 refuted. 0 times theorem prover too weak. 338 trivial. 3 not checked. [2023-02-15 12:56:18,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:18,471 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 12:56:18,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 12:56:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 485 proven. 116 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2023-02-15 12:56:18,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:18,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162623149] [2023-02-15 12:56:18,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:18,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356256595] [2023-02-15 12:56:18,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356256595] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:18,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:18,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2023-02-15 12:56:18,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192785602] [2023-02-15 12:56:18,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:18,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 12:56:18,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:18,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 12:56:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=154, Unknown=2, NotChecked=50, Total=240 [2023-02-15 12:56:18,487 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 12:56:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:19,085 INFO L93 Difference]: Finished difference Result 235 states and 254 transitions. [2023-02-15 12:56:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 12:56:19,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2023-02-15 12:56:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:19,086 INFO L225 Difference]: With dead ends: 235 [2023-02-15 12:56:19,086 INFO L226 Difference]: Without dead ends: 235 [2023-02-15 12:56:19,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 198 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=372, Unknown=2, NotChecked=82, Total=552 [2023-02-15 12:56:19,087 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 223 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:19,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 1187 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 825 Invalid, 0 Unknown, 456 Unchecked, 0.4s Time] [2023-02-15 12:56:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-02-15 12:56:19,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 195. [2023-02-15 12:56:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 126 states have (on average 1.5714285714285714) internal successors, (198), 186 states have internal predecessors, (198), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:56:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 210 transitions. [2023-02-15 12:56:19,093 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 210 transitions. Word has length 110 [2023-02-15 12:56:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:19,093 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 210 transitions. [2023-02-15 12:56:19,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 12:56:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 210 transitions. [2023-02-15 12:56:19,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-15 12:56:19,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:19,095 INFO L195 NwaCegarLoop]: trace histogram [35, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:56:19,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:19,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 12:56:19,303 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:56:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1963125109, now seen corresponding path program 1 times [2023-02-15 12:56:19,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:19,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175212617] [2023-02-15 12:56:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:19,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:19,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:19,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293715702] [2023-02-15 12:56:19,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:19,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:19,338 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:19,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 12:56:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:19,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-15 12:56:19,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:19,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:34,620 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1886 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1886) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|)))) is different from true [2023-02-15 12:56:34,870 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1886 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1886) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-15 12:56:34,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:56:34,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 12:56:34,931 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 12:56:34,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 12:56:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 394 proven. 221 refuted. 0 times theorem prover too weak. 233 trivial. 92 not checked. [2023-02-15 12:56:34,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:35,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:35,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175212617] [2023-02-15 12:56:35,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:35,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293715702] [2023-02-15 12:56:35,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293715702] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:56:35,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:56:35,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-15 12:56:35,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049711852] [2023-02-15 12:56:35,982 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:35,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 12:56:35,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 12:56:35,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=844, Unknown=11, NotChecked=118, Total=1056 [2023-02-15 12:56:35,984 INFO L87 Difference]: Start difference. First operand 195 states and 210 transitions. Second operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:56:38,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:40,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:42,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:48,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:52,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:54,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:58,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:01,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:03,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:05,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:10,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:16,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:24,533 WARN L233 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:57:26,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:36,918 WARN L233 SmtUtils]: Spent 10.32s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:57:38,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:40,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:42,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:57:42,261 INFO L93 Difference]: Finished difference Result 204 states and 224 transitions. [2023-02-15 12:57:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 12:57:42,261 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 110 [2023-02-15 12:57:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:57:42,262 INFO L225 Difference]: With dead ends: 204 [2023-02-15 12:57:42,263 INFO L226 Difference]: Without dead ends: 201 [2023-02-15 12:57:42,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=196, Invalid=1603, Unknown=15, NotChecked=166, Total=1980 [2023-02-15 12:57:42,264 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 45 mSDsluCounter, 3005 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 6 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 32.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:57:42,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3182 Invalid, 2534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2128 Invalid, 15 Unknown, 385 Unchecked, 32.1s Time] [2023-02-15 12:57:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-15 12:57:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-02-15 12:57:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 131 states have (on average 1.5572519083969465) internal successors, (204), 192 states have internal predecessors, (204), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-15 12:57:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 220 transitions. [2023-02-15 12:57:42,271 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 220 transitions. Word has length 110 [2023-02-15 12:57:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:57:42,272 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 220 transitions. [2023-02-15 12:57:42,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:57:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 220 transitions. [2023-02-15 12:57:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-15 12:57:42,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:57:42,273 INFO L195 NwaCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:57:42,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 12:57:42,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 12:57:42,481 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:57:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:57:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash -675336400, now seen corresponding path program 2 times [2023-02-15 12:57:42,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:57:42,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218437307] [2023-02-15 12:57:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:57:42,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:57:42,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:57:42,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524249138] [2023-02-15 12:57:42,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:57:42,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:57:42,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:57:42,523 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:57:42,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 12:57:42,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:57:42,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:57:42,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-15 12:57:42,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:57:42,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:57:54,825 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2360 Int) (v_ArrVal_2359 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2360)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2359) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-15 12:57:54,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:57:54,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 12:57:54,980 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 12:57:54,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 12:57:55,083 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2361 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2361) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-15 12:57:55,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:57:55,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 12:57:55,203 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 12:57:55,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 12:57:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 411 proven. 97 refuted. 0 times theorem prover too weak. 195 trivial. 278 not checked. [2023-02-15 12:57:55,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:57:56,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:57:56,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218437307] [2023-02-15 12:57:56,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:57:56,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524249138] [2023-02-15 12:57:56,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524249138] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:57:56,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:57:56,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-15 12:57:56,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176994256] [2023-02-15 12:57:56,055 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:57:56,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 12:57:56,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:57:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 12:57:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=492, Unknown=6, NotChecked=90, Total=650 [2023-02-15 12:57:56,056 INFO L87 Difference]: Start difference. First operand 201 states and 220 transitions. Second operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:57:58,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:00,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:02,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:06,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:10,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:12,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:14,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:44,847 WARN L233 SmtUtils]: Spent 14.87s on a formula simplification. DAG size of input: 62 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:59:05,463 WARN L233 SmtUtils]: Spent 19.66s on a formula simplification. DAG size of input: 71 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:59:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:59:10,384 INFO L93 Difference]: Finished difference Result 238 states and 265 transitions. [2023-02-15 12:59:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 12:59:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 111 [2023-02-15 12:59:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:59:10,386 INFO L225 Difference]: With dead ends: 238 [2023-02-15 12:59:10,386 INFO L226 Difference]: Without dead ends: 238 [2023-02-15 12:59:10,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 67.2s TimeCoverageRelationStatistics Valid=163, Invalid=1167, Unknown=10, NotChecked=142, Total=1482 [2023-02-15 12:59:10,387 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 417 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 20 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2023-02-15 12:59:10,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 1696 Invalid, 2194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1784 Invalid, 7 Unknown, 383 Unchecked, 18.8s Time] [2023-02-15 12:59:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-02-15 12:59:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 199. [2023-02-15 12:59:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 131 states have (on average 1.5419847328244274) internal successors, (202), 190 states have internal predecessors, (202), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-15 12:59:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 218 transitions. [2023-02-15 12:59:10,394 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 218 transitions. Word has length 111 [2023-02-15 12:59:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:59:10,394 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 218 transitions. [2023-02-15 12:59:10,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:59:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 218 transitions. [2023-02-15 12:59:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-15 12:59:10,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:59:10,396 INFO L195 NwaCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:59:10,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 12:59:10,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 12:59:10,604 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:59:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:59:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1952847899, now seen corresponding path program 1 times [2023-02-15 12:59:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:59:10,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618693512] [2023-02-15 12:59:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:59:10,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:59:10,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:59:10,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724241593] [2023-02-15 12:59:10,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:59:10,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:59:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:59:10,636 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:59:10,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 12:59:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:59:11,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 12:59:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:59:11,103 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_2857 Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2857)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-15 12:59:11,170 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 12:59:11,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 12:59:11,182 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2858 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_2858))) is different from true [2023-02-15 12:59:11,199 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2858 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_2858))) is different from true [2023-02-15 12:59:11,203 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2858 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_2858))) is different from true [2023-02-15 12:59:11,207 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2858 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_2858))) is different from true [2023-02-15 12:59:11,219 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 12:59:11,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-02-15 12:59:11,255 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2859 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2859))) is different from true [2023-02-15 12:59:11,350 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 12:59:11,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-15 12:59:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 425 proven. 72 refuted. 0 times theorem prover too weak. 185 trivial. 299 not checked. [2023-02-15 12:59:11,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:59:12,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:59:12,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618693512] [2023-02-15 12:59:12,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:59:12,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724241593] [2023-02-15 12:59:12,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724241593] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:59:12,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:59:12,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-15 12:59:12,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260492587] [2023-02-15 12:59:12,020 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:59:12,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 12:59:12,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:59:12,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 12:59:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=484, Unknown=6, NotChecked=294, Total=870 [2023-02-15 12:59:12,022 INFO L87 Difference]: Start difference. First operand 199 states and 218 transitions. Second operand has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 12:59:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:59:12,760 INFO L93 Difference]: Finished difference Result 233 states and 258 transitions. [2023-02-15 12:59:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 12:59:12,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 118 [2023-02-15 12:59:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:59:12,762 INFO L225 Difference]: With dead ends: 233 [2023-02-15 12:59:12,763 INFO L226 Difference]: Without dead ends: 233 [2023-02-15 12:59:12,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=779, Unknown=6, NotChecked=378, Total=1332 [2023-02-15 12:59:12,764 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 294 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 30 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 1145 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 12:59:12,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1199 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 809 Invalid, 28 Unknown, 1145 Unchecked, 0.6s Time] [2023-02-15 12:59:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-15 12:59:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 196. [2023-02-15 12:59:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 131 states have (on average 1.5190839694656488) internal successors, (199), 187 states have internal predecessors, (199), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-15 12:59:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 215 transitions. [2023-02-15 12:59:12,770 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 215 transitions. Word has length 118 [2023-02-15 12:59:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:59:12,770 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 215 transitions. [2023-02-15 12:59:12,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 12:59:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 215 transitions. [2023-02-15 12:59:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-15 12:59:12,771 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:59:12,772 INFO L195 NwaCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:59:12,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-15 12:59:12,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 12:59:12,979 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-02-15 12:59:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:59:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1952847898, now seen corresponding path program 1 times [2023-02-15 12:59:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:59:12,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449122186] [2023-02-15 12:59:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:59:12,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:59:13,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:59:13,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222852966] [2023-02-15 12:59:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:59:13,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:59:13,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:59:13,041 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:59:13,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 12:59:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:59:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-15 12:59:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:59:14,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-02-15 12:59:21,624 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_3362 Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3362)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-15 12:59:21,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:59:21,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 12:59:21,890 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 12:59:21,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 12:59:40,278 INFO L350 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 17 treesize of output 13 [2023-02-15 12:59:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 493 proven. 78 refuted. 0 times theorem prover too weak. 338 trivial. 72 not checked. [2023-02-15 12:59:48,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:59:48,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:59:48,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449122186] [2023-02-15 12:59:48,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:59:48,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222852966] [2023-02-15 12:59:48,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222852966] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:59:48,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:59:48,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-15 12:59:48,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83540550] [2023-02-15 12:59:48,754 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:59:48,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 12:59:48,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:59:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 12:59:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=728, Unknown=19, NotChecked=54, Total=870 [2023-02-15 12:59:48,756 INFO L87 Difference]: Start difference. First operand 196 states and 215 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:59:50,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:59:52,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:59:54,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:59:56,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:01,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:03,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:07,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:09,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:11,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:15,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:17,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:19,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]