./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0236.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e 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-0236.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 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 20:38:23,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 20:38:23,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 20:38:23,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 20:38:23,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 20:38:23,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 20:38:23,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 20:38:23,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 20:38:23,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 20:38:23,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 20:38:23,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 20:38:23,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 20:38:23,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 20:38:23,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 20:38:23,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 20:38:23,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 20:38:23,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 20:38:23,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 20:38:23,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 20:38:23,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 20:38:23,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 20:38:23,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 20:38:23,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 20:38:23,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 20:38:23,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 20:38:23,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 20:38:23,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 20:38:23,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 20:38:23,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 20:38:23,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 20:38:23,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 20:38:23,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 20:38:23,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 20:38:23,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 20:38:23,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 20:38:23,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 20:38:23,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 20:38:23,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 20:38:23,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 20:38:23,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 20:38:23,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 20:38:23,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 20:38:23,355 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 20:38:23,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 20:38:23,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 20:38:23,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 20:38:23,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 20:38:23,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 20:38:23,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 20:38:23,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 20:38:23,357 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 20:38:23,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 20:38:23,358 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 20:38:23,358 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 20:38:23,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 20:38:23,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 20:38:23,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 20:38:23,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:38:23,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 20:38:23,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 20:38:23,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 20:38:23,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 20:38:23,360 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 20:38:23,360 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 20:38:23,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 20:38:23,360 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 20:38:23,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 [2023-02-18 20:38:23,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 20:38:23,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 20:38:23,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 20:38:23,582 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 20:38:23,583 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 20:38:23,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0236.i [2023-02-18 20:38:24,584 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 20:38:24,857 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 20:38:24,861 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0236.i [2023-02-18 20:38:24,873 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/890090e5b/16fc87222be64c3bbafce67a7edbef41/FLAG5018f56ad [2023-02-18 20:38:24,887 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/890090e5b/16fc87222be64c3bbafce67a7edbef41 [2023-02-18 20:38:24,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 20:38:24,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 20:38:24,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 20:38:24,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 20:38:24,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 20:38:24,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:38:24" (1/1) ... [2023-02-18 20:38:24,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec56ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:24, skipping insertion in model container [2023-02-18 20:38:24,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:38:24" (1/1) ... [2023-02-18 20:38:24,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 20:38:24,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 20:38:25,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:38:25,229 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 20:38:25,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:38:25,305 INFO L208 MainTranslator]: Completed translation [2023-02-18 20:38:25,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25 WrapperNode [2023-02-18 20:38:25,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 20:38:25,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 20:38:25,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 20:38:25,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 20:38:25,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,364 INFO L138 Inliner]: procedures = 188, calls = 67, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 211 [2023-02-18 20:38:25,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 20:38:25,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 20:38:25,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 20:38:25,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 20:38:25,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,410 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 20:38:25,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 20:38:25,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 20:38:25,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 20:38:25,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (1/1) ... [2023-02-18 20:38:25,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:38:25,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:25,443 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) [2023-02-18 20:38:25,448 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 [2023-02-18 20:38:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 20:38:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 20:38:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 20:38:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 20:38:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-02-18 20:38:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-02-18 20:38:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 20:38:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 20:38:25,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 20:38:25,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 20:38:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 20:38:25,582 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 20:38:25,583 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 20:38:26,011 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 20:38:26,022 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 20:38:26,025 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2023-02-18 20:38:26,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:38:26 BoogieIcfgContainer [2023-02-18 20:38:26,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 20:38:26,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 20:38:26,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 20:38:26,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 20:38:26,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 08:38:24" (1/3) ... [2023-02-18 20:38:26,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da47522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:38:26, skipping insertion in model container [2023-02-18 20:38:26,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:38:25" (2/3) ... [2023-02-18 20:38:26,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da47522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:38:26, skipping insertion in model container [2023-02-18 20:38:26,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:38:26" (3/3) ... [2023-02-18 20:38:26,034 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0236.i [2023-02-18 20:38:26,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 20:38:26,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2023-02-18 20:38:26,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 20:38:26,117 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;@58e09912, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 20:38:26,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2023-02-18 20:38:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 116 states have (on average 1.956896551724138) internal successors, (227), 205 states have internal predecessors, (227), 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) [2023-02-18 20:38:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-18 20:38:26,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:26,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-18 20:38:26,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:26,132 INFO L85 PathProgramCache]: Analyzing trace with hash 930822, now seen corresponding path program 1 times [2023-02-18 20:38:26,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:26,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433595621] [2023-02-18 20:38:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:26,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:26,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:26,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433595621] [2023-02-18 20:38:26,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433595621] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:26,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:26,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:38:26,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38975989] [2023-02-18 20:38:26,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:26,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 20:38:26,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:26,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 20:38:26,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 20:38:26,279 INFO L87 Difference]: Start difference. First operand has 213 states, 116 states have (on average 1.956896551724138) internal successors, (227), 205 states have internal predecessors, (227), 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) [2023-02-18 20:38:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:26,320 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2023-02-18 20:38:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 20:38:26,324 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 [2023-02-18 20:38:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:26,336 INFO L225 Difference]: With dead ends: 213 [2023-02-18 20:38:26,337 INFO L226 Difference]: Without dead ends: 211 [2023-02-18 20:38:26,338 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 [2023-02-18 20:38:26,341 INFO L413 NwaCegarLoop]: 228 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, 228 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 [2023-02-18 20:38:26,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:38:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-18 20:38:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-02-18 20:38:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 115 states have (on average 1.8608695652173912) internal successors, (214), 203 states have internal predecessors, (214), 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) [2023-02-18 20:38:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 226 transitions. [2023-02-18 20:38:26,380 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 226 transitions. Word has length 4 [2023-02-18 20:38:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:26,380 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 226 transitions. [2023-02-18 20:38:26,381 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) [2023-02-18 20:38:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 226 transitions. [2023-02-18 20:38:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 20:38:26,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:26,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 20:38:26,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 20:38:26,382 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:26,382 INFO L85 PathProgramCache]: Analyzing trace with hash 889864464, now seen corresponding path program 1 times [2023-02-18 20:38:26,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:26,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521355339] [2023-02-18 20:38:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:26,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:26,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:26,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125013557] [2023-02-18 20:38:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:26,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:26,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:26,406 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) [2023-02-18 20:38:26,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 20:38:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:26,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 20:38:26,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:26,523 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 [2023-02-18 20:38:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:26,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 20:38:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:26,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521355339] [2023-02-18 20:38:26,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:26,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125013557] [2023-02-18 20:38:26,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125013557] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:26,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:26,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:38:26,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730008898] [2023-02-18 20:38:26,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:26,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:38:26,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:38:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:38:26,537 INFO L87 Difference]: Start difference. First operand 211 states and 226 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) [2023-02-18 20:38:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:26,661 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2023-02-18 20:38:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:38:26,661 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 [2023-02-18 20:38:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:26,662 INFO L225 Difference]: With dead ends: 210 [2023-02-18 20:38:26,662 INFO L226 Difference]: Without dead ends: 210 [2023-02-18 20:38:26,663 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 [2023-02-18 20:38:26,663 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 9 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:26,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 346 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-18 20:38:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2023-02-18 20:38:26,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 115 states have (on average 1.8521739130434782) internal successors, (213), 202 states have internal predecessors, (213), 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) [2023-02-18 20:38:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 225 transitions. [2023-02-18 20:38:26,672 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 225 transitions. Word has length 6 [2023-02-18 20:38:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:26,672 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 225 transitions. [2023-02-18 20:38:26,672 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) [2023-02-18 20:38:26,672 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 225 transitions. [2023-02-18 20:38:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 20:38:26,673 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:26,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:38:26,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:26,878 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 [2023-02-18 20:38:26,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1815994960, now seen corresponding path program 1 times [2023-02-18 20:38:26,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:26,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328290361] [2023-02-18 20:38:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:26,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:26,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:26,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025751031] [2023-02-18 20:38:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:26,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:26,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:26,892 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) [2023-02-18 20:38:26,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 20:38:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:26,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 20:38:26,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:26,969 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 [2023-02-18 20:38:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:38:26,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 20:38:26,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:26,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328290361] [2023-02-18 20:38:26,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:26,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025751031] [2023-02-18 20:38:26,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025751031] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:26,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:26,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:38:26,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746271977] [2023-02-18 20:38:26,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:26,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:38:26,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:26,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:38:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:38:26,982 INFO L87 Difference]: Start difference. First operand 210 states and 225 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) [2023-02-18 20:38:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:27,097 INFO L93 Difference]: Finished difference Result 219 states and 234 transitions. [2023-02-18 20:38:27,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:38:27,097 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 [2023-02-18 20:38:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:27,098 INFO L225 Difference]: With dead ends: 219 [2023-02-18 20:38:27,098 INFO L226 Difference]: Without dead ends: 219 [2023-02-18 20:38:27,099 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 [2023-02-18 20:38:27,099 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 16 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:27,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 571 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-02-18 20:38:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-02-18 20:38:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 123 states have (on average 1.8048780487804879) internal successors, (222), 210 states have internal predecessors, (222), 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) [2023-02-18 20:38:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 234 transitions. [2023-02-18 20:38:27,108 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 234 transitions. Word has length 7 [2023-02-18 20:38:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:27,108 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 234 transitions. [2023-02-18 20:38:27,108 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) [2023-02-18 20:38:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 234 transitions. [2023-02-18 20:38:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-18 20:38:27,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:27,110 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] [2023-02-18 20:38:27,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:27,317 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 [2023-02-18 20:38:27,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:27,319 INFO L85 PathProgramCache]: Analyzing trace with hash 973450151, now seen corresponding path program 1 times [2023-02-18 20:38:27,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:27,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220233920] [2023-02-18 20:38:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:27,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:27,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:27,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661314702] [2023-02-18 20:38:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:27,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:27,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:27,343 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) [2023-02-18 20:38:27,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 20:38:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:27,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 20:38:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:27,587 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 [2023-02-18 20:38:27,653 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 19 treesize of output 15 [2023-02-18 20:38:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-18 20:38:29,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 20:38:29,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:29,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220233920] [2023-02-18 20:38:29,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:29,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661314702] [2023-02-18 20:38:29,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661314702] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:29,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:29,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:38:29,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639951165] [2023-02-18 20:38:29,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:29,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:38:29,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:29,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:38:29,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=12, Unknown=1, NotChecked=0, Total=20 [2023-02-18 20:38:29,776 INFO L87 Difference]: Start difference. First operand 219 states and 234 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 20:38:32,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:38:34,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:38:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:34,605 INFO L93 Difference]: Finished difference Result 231 states and 246 transitions. [2023-02-18 20:38:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:38:34,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2023-02-18 20:38:34,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:34,607 INFO L225 Difference]: With dead ends: 231 [2023-02-18 20:38:34,607 INFO L226 Difference]: Without dead ends: 221 [2023-02-18 20:38:34,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2023-02-18 20:38:34,608 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 19 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:34,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 759 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-02-18 20:38:34,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-18 20:38:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-02-18 20:38:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 125 states have (on average 1.792) internal successors, (224), 212 states have internal predecessors, (224), 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) [2023-02-18 20:38:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 236 transitions. [2023-02-18 20:38:34,613 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 236 transitions. Word has length 66 [2023-02-18 20:38:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:34,613 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 236 transitions. [2023-02-18 20:38:34,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 20:38:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 236 transitions. [2023-02-18 20:38:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 20:38:34,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:34,614 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] [2023-02-18 20:38:34,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:34,820 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 [2023-02-18 20:38:34,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1160552703, now seen corresponding path program 1 times [2023-02-18 20:38:34,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:34,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839704007] [2023-02-18 20:38:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:34,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:34,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:34,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819399891] [2023-02-18 20:38:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:34,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:34,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:34,862 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) [2023-02-18 20:38:34,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 20:38:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:35,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 20:38:35,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:35,076 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 [2023-02-18 20:38:35,082 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 [2023-02-18 20:38:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-18 20:38:35,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-02-18 20:38:35,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:35,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839704007] [2023-02-18 20:38:35,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:35,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819399891] [2023-02-18 20:38:35,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819399891] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:38:35,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 20:38:35,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-02-18 20:38:35,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056252740] [2023-02-18 20:38:35,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:35,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 20:38:35,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:35,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 20:38:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-18 20:38:35,229 INFO L87 Difference]: Start difference. First operand 221 states and 236 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 20:38:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:35,425 INFO L93 Difference]: Finished difference Result 247 states and 264 transitions. [2023-02-18 20:38:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:38:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-02-18 20:38:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:35,427 INFO L225 Difference]: With dead ends: 247 [2023-02-18 20:38:35,427 INFO L226 Difference]: Without dead ends: 227 [2023-02-18 20:38:35,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-02-18 20:38:35,428 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 38 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:35,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1184 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 20:38:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-02-18 20:38:35,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-02-18 20:38:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 131 states have (on average 1.7557251908396947) internal successors, (230), 218 states have internal predecessors, (230), 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) [2023-02-18 20:38:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 242 transitions. [2023-02-18 20:38:35,432 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 242 transitions. Word has length 71 [2023-02-18 20:38:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:35,432 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 242 transitions. [2023-02-18 20:38:35,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 20:38:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 242 transitions. [2023-02-18 20:38:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-18 20:38:35,434 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:35,434 INFO L195 NwaCegarLoop]: trace histogram [20, 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] [2023-02-18 20:38:35,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:35,640 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 [2023-02-18 20:38:35,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:35,641 INFO L85 PathProgramCache]: Analyzing trace with hash -809109081, now seen corresponding path program 2 times [2023-02-18 20:38:35,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:35,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245543128] [2023-02-18 20:38:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:35,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:35,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:35,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17826413] [2023-02-18 20:38:35,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:38:35,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:35,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:35,665 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) [2023-02-18 20:38:35,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 20:38:36,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:38:36,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:38:36,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 20:38:36,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:36,074 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 [2023-02-18 20:38:36,086 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 [2023-02-18 20:38:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 255 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-18 20:38:36,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 79 proven. 74 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-18 20:38:36,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:36,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245543128] [2023-02-18 20:38:36,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:36,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17826413] [2023-02-18 20:38:36,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17826413] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:38:36,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 20:38:36,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-02-18 20:38:36,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365443345] [2023-02-18 20:38:36,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:36,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 20:38:36,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 20:38:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-02-18 20:38:36,280 INFO L87 Difference]: Start difference. First operand 227 states and 242 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 20:38:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:36,889 INFO L93 Difference]: Finished difference Result 259 states and 282 transitions. [2023-02-18 20:38:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 20:38:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2023-02-18 20:38:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:36,890 INFO L225 Difference]: With dead ends: 259 [2023-02-18 20:38:36,890 INFO L226 Difference]: Without dead ends: 239 [2023-02-18 20:38:36,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2023-02-18 20:38:36,891 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 37 mSDsluCounter, 2368 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:36,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2581 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 20:38:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-02-18 20:38:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2023-02-18 20:38:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 143 states have (on average 1.6923076923076923) internal successors, (242), 230 states have internal predecessors, (242), 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) [2023-02-18 20:38:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 254 transitions. [2023-02-18 20:38:36,895 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 254 transitions. Word has length 86 [2023-02-18 20:38:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:36,895 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 254 transitions. [2023-02-18 20:38:36,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 20:38:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 254 transitions. [2023-02-18 20:38:36,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-18 20:38:36,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:36,896 INFO L195 NwaCegarLoop]: trace histogram [50, 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] [2023-02-18 20:38:36,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:37,108 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 [2023-02-18 20:38:37,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1800245593, now seen corresponding path program 3 times [2023-02-18 20:38:37,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:37,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293843559] [2023-02-18 20:38:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:37,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:37,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903658202] [2023-02-18 20:38:37,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:38:37,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:37,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:37,193 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) [2023-02-18 20:38:37,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 20:38:37,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 20:38:37,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:38:37,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 20:38:37,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:37,353 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 [2023-02-18 20:38:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2023-02-18 20:38:37,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 20:38:37,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293843559] [2023-02-18 20:38:37,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903658202] [2023-02-18 20:38:37,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903658202] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:37,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:37,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:38:37,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836116393] [2023-02-18 20:38:37,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:37,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:38:37,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:37,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:38:37,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:38:37,362 INFO L87 Difference]: Start difference. First operand 239 states and 254 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) [2023-02-18 20:38:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:37,486 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2023-02-18 20:38:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:38:37,487 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 116 [2023-02-18 20:38:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:37,488 INFO L225 Difference]: With dead ends: 238 [2023-02-18 20:38:37,488 INFO L226 Difference]: Without dead ends: 238 [2023-02-18 20:38:37,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:38:37,489 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 16 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:37,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 590 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:38:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-02-18 20:38:37,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-02-18 20:38:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 143 states have (on average 1.6853146853146854) internal successors, (241), 229 states have internal predecessors, (241), 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) [2023-02-18 20:38:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 253 transitions. [2023-02-18 20:38:37,492 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 253 transitions. Word has length 116 [2023-02-18 20:38:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:37,493 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 253 transitions. [2023-02-18 20:38:37,493 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) [2023-02-18 20:38:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 253 transitions. [2023-02-18 20:38:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-18 20:38:37,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:37,494 INFO L195 NwaCegarLoop]: trace histogram [60, 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] [2023-02-18 20:38:37,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:37,699 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 [2023-02-18 20:38:37,699 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash 924129770, now seen corresponding path program 1 times [2023-02-18 20:38:37,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:37,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010479611] [2023-02-18 20:38:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:37,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:37,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:37,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894521868] [2023-02-18 20:38:37,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:37,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:37,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:37,777 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) [2023-02-18 20:38:37,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 20:38:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:38,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 20:38:38,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:38,187 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1761 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1761))) is different from true [2023-02-18 20:38:38,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:38,241 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 28 [2023-02-18 20:38:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 1029 proven. 127 refuted. 0 times theorem prover too weak. 1108 trivial. 1 not checked. [2023-02-18 20:38:38,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:38,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:38,315 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 16 [2023-02-18 20:38:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 1029 proven. 128 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2023-02-18 20:38:38,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:38,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010479611] [2023-02-18 20:38:38,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:38,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894521868] [2023-02-18 20:38:38,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894521868] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:38:38,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 20:38:38,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-02-18 20:38:38,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448449841] [2023-02-18 20:38:38,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:38,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 20:38:38,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:38,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 20:38:38,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-02-18 20:38:38,324 INFO L87 Difference]: Start difference. First operand 238 states and 253 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) [2023-02-18 20:38:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:38,716 INFO L93 Difference]: Finished difference Result 273 states and 292 transitions. [2023-02-18 20:38:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 20:38:38,716 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 133 [2023-02-18 20:38:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:38,717 INFO L225 Difference]: With dead ends: 273 [2023-02-18 20:38:38,718 INFO L226 Difference]: Without dead ends: 273 [2023-02-18 20:38:38,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 249 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2023-02-18 20:38:38,718 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 145 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:38,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1173 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 824 Invalid, 0 Unknown, 261 Unchecked, 0.3s Time] [2023-02-18 20:38:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-02-18 20:38:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 234. [2023-02-18 20:38:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 143 states have (on average 1.6573426573426573) internal successors, (237), 225 states have internal predecessors, (237), 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) [2023-02-18 20:38:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 249 transitions. [2023-02-18 20:38:38,722 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 249 transitions. Word has length 133 [2023-02-18 20:38:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:38,723 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 249 transitions. [2023-02-18 20:38:38,723 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) [2023-02-18 20:38:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 249 transitions. [2023-02-18 20:38:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-18 20:38:38,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:38,724 INFO L195 NwaCegarLoop]: trace histogram [60, 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] [2023-02-18 20:38:38,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:38,932 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 [2023-02-18 20:38:38,932 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:38,934 INFO L85 PathProgramCache]: Analyzing trace with hash 924129771, now seen corresponding path program 1 times [2023-02-18 20:38:38,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:38,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662916277] [2023-02-18 20:38:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:38,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:38,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:38,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451434328] [2023-02-18 20:38:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:38,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:38,994 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) [2023-02-18 20:38:38,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 20:38:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:41,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 20:38:41,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:41,929 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2509 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2509)))) is different from true [2023-02-18 20:38:41,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:38:41,942 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 12 treesize of output 14 [2023-02-18 20:38:41,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:38:41,944 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 15 [2023-02-18 20:38:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 1029 proven. 0 refuted. 0 times theorem prover too weak. 1108 trivial. 128 not checked. [2023-02-18 20:38:41,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:41,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:41,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662916277] [2023-02-18 20:38:41,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:41,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451434328] [2023-02-18 20:38:41,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451434328] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:38:41,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:38:41,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 20:38:41,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685920033] [2023-02-18 20:38:41,984 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:41,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 20:38:41,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 20:38:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=153, Unknown=1, NotChecked=24, Total=210 [2023-02-18 20:38:41,985 INFO L87 Difference]: Start difference. First operand 234 states and 249 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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) [2023-02-18 20:38:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:42,622 INFO L93 Difference]: Finished difference Result 275 states and 297 transitions. [2023-02-18 20:38:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 20:38:42,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 133 [2023-02-18 20:38:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:42,624 INFO L225 Difference]: With dead ends: 275 [2023-02-18 20:38:42,625 INFO L226 Difference]: Without dead ends: 275 [2023-02-18 20:38:42,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=273, Unknown=1, NotChecked=34, Total=380 [2023-02-18 20:38:42,625 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 241 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:42,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 888 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1145 Invalid, 0 Unknown, 259 Unchecked, 0.6s Time] [2023-02-18 20:38:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-02-18 20:38:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 230. [2023-02-18 20:38:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.6293706293706294) internal successors, (233), 221 states have internal predecessors, (233), 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) [2023-02-18 20:38:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 245 transitions. [2023-02-18 20:38:42,631 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 245 transitions. Word has length 133 [2023-02-18 20:38:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:42,631 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 245 transitions. [2023-02-18 20:38:42,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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) [2023-02-18 20:38:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 245 transitions. [2023-02-18 20:38:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-02-18 20:38:42,632 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:42,633 INFO L195 NwaCegarLoop]: trace histogram [60, 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] [2023-02-18 20:38:42,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:42,833 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 [2023-02-18 20:38:42,833 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash 9617696, now seen corresponding path program 1 times [2023-02-18 20:38:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:42,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852098855] [2023-02-18 20:38:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:42,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:42,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:42,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792241110] [2023-02-18 20:38:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:42,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:42,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:42,925 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) [2023-02-18 20:38:42,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 20:38:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:43,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1458 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 20:38:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:43,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-18 20:38:43,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-18 20:38:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 640 proven. 0 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2023-02-18 20:38:43,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 20:38:43,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:43,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852098855] [2023-02-18 20:38:43,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792241110] [2023-02-18 20:38:43,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792241110] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:38:43,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:38:43,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 20:38:43,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155335285] [2023-02-18 20:38:43,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:38:43,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 20:38:43,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 20:38:43,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-18 20:38:43,311 INFO L87 Difference]: Start difference. First operand 230 states and 245 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 20:38:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:38:43,609 INFO L93 Difference]: Finished difference Result 230 states and 245 transitions. [2023-02-18 20:38:43,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 20:38:43,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2023-02-18 20:38:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:38:43,611 INFO L225 Difference]: With dead ends: 230 [2023-02-18 20:38:43,611 INFO L226 Difference]: Without dead ends: 230 [2023-02-18 20:38:43,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-18 20:38:43,612 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 35 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:38:43,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1237 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 20:38:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-02-18 20:38:43,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2023-02-18 20:38:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 143 states have (on average 1.6223776223776223) internal successors, (232), 220 states have internal predecessors, (232), 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) [2023-02-18 20:38:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 244 transitions. [2023-02-18 20:38:43,615 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 244 transitions. Word has length 136 [2023-02-18 20:38:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:38:43,615 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 244 transitions. [2023-02-18 20:38:43,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 20:38:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 244 transitions. [2023-02-18 20:38:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-02-18 20:38:43,616 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:38:43,616 INFO L195 NwaCegarLoop]: trace histogram [60, 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] [2023-02-18 20:38:43,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 20:38:43,824 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 [2023-02-18 20:38:43,825 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:38:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:38:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash 9617697, now seen corresponding path program 1 times [2023-02-18 20:38:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:38:43,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930999938] [2023-02-18 20:38:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:43,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:38:43,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:38:43,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116042438] [2023-02-18 20:38:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:38:43,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:38:43,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:38:43,862 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) [2023-02-18 20:38:43,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 20:38:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:38:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1458 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 20:38:44,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:38:44,361 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 [2023-02-18 20:38:54,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-18 20:38:54,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-18 20:38:54,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-18 20:38:54,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-18 20:38:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 560 proven. 538 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2023-02-18 20:38:54,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:38:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 658 proven. 36 refuted. 0 times theorem prover too weak. 1571 trivial. 0 not checked. [2023-02-18 20:38:57,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:38:57,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930999938] [2023-02-18 20:38:57,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:38:57,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116042438] [2023-02-18 20:38:57,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116042438] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:38:57,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 20:38:57,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 43 [2023-02-18 20:38:57,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487864848] [2023-02-18 20:38:57,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 20:38:57,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 20:38:57,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:38:57,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 20:38:57,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1674, Unknown=4, NotChecked=0, Total=1892 [2023-02-18 20:38:57,968 INFO L87 Difference]: Start difference. First operand 229 states and 244 transitions. Second operand has 44 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-18 20:39:00,268 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] [2023-02-18 20:39:02,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:06,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:08,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:10,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:39:16,382 INFO L93 Difference]: Finished difference Result 228 states and 243 transitions. [2023-02-18 20:39:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 20:39:16,382 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 136 [2023-02-18 20:39:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:39:16,383 INFO L225 Difference]: With dead ends: 228 [2023-02-18 20:39:16,383 INFO L226 Difference]: Without dead ends: 228 [2023-02-18 20:39:16,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=383, Invalid=2582, Unknown=5, NotChecked=0, Total=2970 [2023-02-18 20:39:16,384 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 48 mSDsluCounter, 4497 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4702 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:39:16,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4702 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1858 Invalid, 5 Unknown, 0 Unchecked, 12.3s Time] [2023-02-18 20:39:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-18 20:39:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2023-02-18 20:39:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 143 states have (on average 1.6153846153846154) internal successors, (231), 219 states have internal predecessors, (231), 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) [2023-02-18 20:39:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 243 transitions. [2023-02-18 20:39:16,388 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 243 transitions. Word has length 136 [2023-02-18 20:39:16,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:39:16,388 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 243 transitions. [2023-02-18 20:39:16,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-18 20:39:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 243 transitions. [2023-02-18 20:39:16,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-02-18 20:39:16,394 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:39:16,394 INFO L195 NwaCegarLoop]: trace histogram [60, 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] [2023-02-18 20:39:16,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 20:39:16,595 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 [2023-02-18 20:39:16,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:39:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:39:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1242013359, now seen corresponding path program 1 times [2023-02-18 20:39:16,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:39:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089044959] [2023-02-18 20:39:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:39:16,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:39:16,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:39:16,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089181043] [2023-02-18 20:39:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:39:16,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:39:16,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:39:16,667 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) [2023-02-18 20:39:16,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 20:39:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:39:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 20:39:17,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:39:17,172 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4815 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4815)))) is different from true [2023-02-18 20:39:17,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:39:17,193 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 39 [2023-02-18 20:39:17,202 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4816 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4816))) is different from true [2023-02-18 20:39:17,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:39:17,231 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 28 [2023-02-18 20:39:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 1160 proven. 127 refuted. 0 times theorem prover too weak. 721 trivial. 257 not checked. [2023-02-18 20:39:17,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:39:17,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:39:17,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089044959] [2023-02-18 20:39:17,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:39:17,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089181043] [2023-02-18 20:39:17,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089181043] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:39:17,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:39:17,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-18 20:39:17,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867766549] [2023-02-18 20:39:17,341 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:39:17,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 20:39:17,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:39:17,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 20:39:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=179, Unknown=2, NotChecked=54, Total=272 [2023-02-18 20:39:17,342 INFO L87 Difference]: Start difference. First operand 228 states and 243 transitions. Second operand has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 20:39:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:39:17,939 INFO L93 Difference]: Finished difference Result 263 states and 282 transitions. [2023-02-18 20:39:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 20:39:17,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 139 [2023-02-18 20:39:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:39:17,940 INFO L225 Difference]: With dead ends: 263 [2023-02-18 20:39:17,940 INFO L226 Difference]: Without dead ends: 263 [2023-02-18 20:39:17,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=411, Unknown=2, NotChecked=86, Total=600 [2023-02-18 20:39:17,941 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 247 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 24 mSolverCounterUnsat, 42 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 42 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:39:17,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 1286 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 918 Invalid, 42 Unknown, 444 Unchecked, 0.5s Time] [2023-02-18 20:39:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-02-18 20:39:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 224. [2023-02-18 20:39:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 143 states have (on average 1.5874125874125875) internal successors, (227), 215 states have internal predecessors, (227), 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) [2023-02-18 20:39:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 239 transitions. [2023-02-18 20:39:17,952 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 239 transitions. Word has length 139 [2023-02-18 20:39:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:39:17,953 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 239 transitions. [2023-02-18 20:39:17,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 20:39:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 239 transitions. [2023-02-18 20:39:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-02-18 20:39:17,954 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:39:17,954 INFO L195 NwaCegarLoop]: trace histogram [60, 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] [2023-02-18 20:39:17,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 20:39:18,162 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 [2023-02-18 20:39:18,163 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:39:18,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:39:18,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1242013358, now seen corresponding path program 1 times [2023-02-18 20:39:18,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:39:18,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336964222] [2023-02-18 20:39:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:39:18,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:39:18,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:39:18,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703247805] [2023-02-18 20:39:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:39:18,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:39:18,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:39:18,208 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) [2023-02-18 20:39:18,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 20:39:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:39:18,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-18 20:39:18,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:39:18,705 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 [2023-02-18 20:39:31,533 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5605 Int) (v_ArrVal_5604 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_5604)) (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5605)))) is different from true [2023-02-18 20:39:31,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:39:31,594 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 39 [2023-02-18 20:39:31,598 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 [2023-02-18 20:39:32,092 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5606 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5606)))) is different from true [2023-02-18 20:39:32,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:39:32,173 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 [2023-02-18 20:39:32,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:39:32,175 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 15 [2023-02-18 20:39:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 904 proven. 362 refuted. 0 times theorem prover too weak. 439 trivial. 560 not checked. [2023-02-18 20:39:32,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:39:32,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:39:32,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336964222] [2023-02-18 20:39:32,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:39:32,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703247805] [2023-02-18 20:39:32,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703247805] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:39:32,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:39:32,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-18 20:39:32,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120466390] [2023-02-18 20:39:32,874 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:39:32,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 20:39:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:39:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 20:39:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=907, Unknown=7, NotChecked=122, Total=1122 [2023-02-18 20:39:32,875 INFO L87 Difference]: Start difference. First operand 224 states and 239 transitions. Second operand has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 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) [2023-02-18 20:39:34,913 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] [2023-02-18 20:39:36,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:38,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:44,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:49,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:51,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:53,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:55,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:57,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:39:59,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:01,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:40:13,016 INFO L93 Difference]: Finished difference Result 259 states and 278 transitions. [2023-02-18 20:40:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 20:40:13,017 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 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 139 [2023-02-18 20:40:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:40:13,018 INFO L225 Difference]: With dead ends: 259 [2023-02-18 20:40:13,018 INFO L226 Difference]: Without dead ends: 259 [2023-02-18 20:40:13,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=219, Invalid=2130, Unknown=11, NotChecked=190, Total=2550 [2023-02-18 20:40:13,019 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 464 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 21 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time [2023-02-18 20:40:13,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 2298 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2559 Invalid, 11 Unknown, 430 Unchecked, 28.7s Time] [2023-02-18 20:40:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-18 20:40:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 221. [2023-02-18 20:40:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 143 states have (on average 1.5664335664335665) internal successors, (224), 212 states have internal predecessors, (224), 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) [2023-02-18 20:40:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 236 transitions. [2023-02-18 20:40:13,022 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 236 transitions. Word has length 139 [2023-02-18 20:40:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:40:13,022 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 236 transitions. [2023-02-18 20:40:13,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 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) [2023-02-18 20:40:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 236 transitions. [2023-02-18 20:40:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-02-18 20:40:13,023 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:40:13,023 INFO L195 NwaCegarLoop]: trace histogram [60, 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, 1, 1, 1, 1] [2023-02-18 20:40:13,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 20:40:13,223 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 [2023-02-18 20:40:13,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:40:13,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:40:13,224 INFO L85 PathProgramCache]: Analyzing trace with hash -728969266, now seen corresponding path program 1 times [2023-02-18 20:40:13,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:40:13,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424236997] [2023-02-18 20:40:13,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:40:13,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:40:13,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:40:13,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481258890] [2023-02-18 20:40:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:40:13,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:40:13,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:40:13,263 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) [2023-02-18 20:40:13,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 20:40:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:40:16,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1537 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-18 20:40:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:40:16,967 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 [2023-02-18 20:40:35,578 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6415 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6415)))) is different from true [2023-02-18 20:40:35,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:40:35,608 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 [2023-02-18 20:40:35,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:40:35,611 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 15 [2023-02-18 20:40:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 819 proven. 540 refuted. 0 times theorem prover too weak. 668 trivial. 238 not checked. [2023-02-18 20:40:35,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:40:35,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:40:35,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424236997] [2023-02-18 20:40:35,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:40:35,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481258890] [2023-02-18 20:40:35,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481258890] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:40:35,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:40:35,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-02-18 20:40:35,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793658740] [2023-02-18 20:40:35,731 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:40:35,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 20:40:35,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:40:35,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 20:40:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1091, Unknown=9, NotChecked=66, Total=1260 [2023-02-18 20:40:35,732 INFO L87 Difference]: Start difference. First operand 221 states and 236 transitions. Second operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 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) [2023-02-18 20:40:37,748 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] [2023-02-18 20:40:39,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:41,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:48,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:52,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:55,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:40:59,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:01,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:05,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:09,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:13,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:15,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:19,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:22,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:24,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:26,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:28,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:41:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:41:29,972 INFO L93 Difference]: Finished difference Result 236 states and 258 transitions. [2023-02-18 20:41:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 20:41:29,972 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 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 146 [2023-02-18 20:41:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:41:29,975 INFO L225 Difference]: With dead ends: 236 [2023-02-18 20:41:29,976 INFO L226 Difference]: Without dead ends: 233 [2023-02-18 20:41:29,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=237, Invalid=2401, Unknown=18, NotChecked=100, Total=2756 [2023-02-18 20:41:29,978 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 50 mSDsluCounter, 2966 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 6 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3164 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 37.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:41:29,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 3164 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1428 Invalid, 17 Unknown, 208 Unchecked, 37.3s Time] [2023-02-18 20:41:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-18 20:41:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 227. [2023-02-18 20:41:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 148 states have (on average 1.554054054054054) internal successors, (230), 218 states have internal predecessors, (230), 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) [2023-02-18 20:41:29,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 246 transitions. [2023-02-18 20:41:29,986 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 246 transitions. Word has length 146 [2023-02-18 20:41:29,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:41:29,986 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 246 transitions. [2023-02-18 20:41:29,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 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) [2023-02-18 20:41:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 246 transitions. [2023-02-18 20:41:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-02-18 20:41:29,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:41:29,987 INFO L195 NwaCegarLoop]: trace histogram [61, 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, 1, 1, 1, 1] [2023-02-18 20:41:30,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 20:41:30,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 20:41:30,201 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:41:30,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:41:30,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2095759298, now seen corresponding path program 2 times [2023-02-18 20:41:30,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:41:30,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700417375] [2023-02-18 20:41:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:41:30,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:41:30,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:41:30,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218382979] [2023-02-18 20:41:30,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:41:30,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:41:30,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:41:30,238 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:41:30,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 20:41:33,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:41:33,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:41:33,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1552 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-18 20:41:33,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:41:33,242 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 [2023-02-18 20:41:55,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:41:55,981 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 32 [2023-02-18 20:41:55,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:41:55,987 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 15 [2023-02-18 20:41:56,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-18 20:41:56,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2023-02-18 20:41:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2331 backedges. 1073 proven. 205 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2023-02-18 20:41:56,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:41:56,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:41:56,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700417375] [2023-02-18 20:41:56,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:41:56,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218382979] [2023-02-18 20:41:56,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218382979] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:41:56,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:41:56,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-18 20:41:56,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864970434] [2023-02-18 20:41:56,600 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:41:56,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 20:41:56,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:41:56,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 20:41:56,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=787, Unknown=11, NotChecked=0, Total=870 [2023-02-18 20:41:56,601 INFO L87 Difference]: Start difference. First operand 227 states and 246 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 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) [2023-02-18 20:41:58,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:00,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:05,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:09,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:13,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:17,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:19,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:23,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:28,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:32,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:36,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:40,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:44,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:48,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:55,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:42:59,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:01,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:03,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:07,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:10,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:14,338 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] [2023-02-18 20:43:16,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:43:16,127 INFO L93 Difference]: Finished difference Result 248 states and 276 transitions. [2023-02-18 20:43:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 20:43:16,128 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 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 147 [2023-02-18 20:43:16,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:43:16,129 INFO L225 Difference]: With dead ends: 248 [2023-02-18 20:43:16,129 INFO L226 Difference]: Without dead ends: 245 [2023-02-18 20:43:16,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 56.8s TimeCoverageRelationStatistics Valid=336, Invalid=2607, Unknown=27, NotChecked=0, Total=2970 [2023-02-18 20:43:16,129 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 102 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 7 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.9s IncrementalHoareTripleChecker+Time [2023-02-18 20:43:16,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1972 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2227 Invalid, 21 Unknown, 0 Unchecked, 45.9s Time] [2023-02-18 20:43:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-02-18 20:43:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 228. [2023-02-18 20:43:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 149 states have (on average 1.5570469798657718) internal successors, (232), 219 states have internal predecessors, (232), 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) [2023-02-18 20:43:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 248 transitions. [2023-02-18 20:43:16,136 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 248 transitions. Word has length 147 [2023-02-18 20:43:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:43:16,136 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 248 transitions. [2023-02-18 20:43:16,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 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) [2023-02-18 20:43:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 248 transitions. [2023-02-18 20:43:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-02-18 20:43:16,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:43:16,137 INFO L195 NwaCegarLoop]: trace histogram [62, 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, 1, 1, 1, 1] [2023-02-18 20:43:16,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 20:43:16,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:43:16,343 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:43:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:43:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash -531968434, now seen corresponding path program 3 times [2023-02-18 20:43:16,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:43:16,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460191407] [2023-02-18 20:43:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:43:16,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:43:16,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:43:16,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277933862] [2023-02-18 20:43:16,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:43:16,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:43:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:43:16,397 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:43:16,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 20:43:18,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 20:43:18,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:43:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-18 20:43:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:43:18,650 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 [2023-02-18 20:43:18,655 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 [2023-02-18 20:43:18,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:43:18,773 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 12 treesize of output 14 [2023-02-18 20:43:18,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:43:18,776 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 22 treesize of output 42 [2023-02-18 20:43:18,798 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| Int)) (and (exists ((v_ArrVal_8074 Int)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_8074))) (= 0 (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|)))) is different from true [2023-02-18 20:43:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:43:18,811 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 12 treesize of output 14 [2023-02-18 20:43:18,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:43:18,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 75 [2023-02-18 20:43:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 1226 proven. 150 refuted. 0 times theorem prover too weak. 744 trivial. 278 not checked. [2023-02-18 20:43:18,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:43:18,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:43:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460191407] [2023-02-18 20:43:18,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:43:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277933862] [2023-02-18 20:43:18,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277933862] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:43:18,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:43:18,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-18 20:43:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430930946] [2023-02-18 20:43:18,868 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:43:18,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 20:43:18,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:43:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 20:43:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=204, Unknown=1, NotChecked=28, Total=272 [2023-02-18 20:43:18,869 INFO L87 Difference]: Start difference. First operand 228 states and 248 transitions. Second operand has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 20:43:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:43:19,783 INFO L93 Difference]: Finished difference Result 264 states and 291 transitions. [2023-02-18 20:43:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 20:43:19,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 148 [2023-02-18 20:43:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:43:19,785 INFO L225 Difference]: With dead ends: 264 [2023-02-18 20:43:19,785 INFO L226 Difference]: Without dead ends: 264 [2023-02-18 20:43:19,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=339, Unknown=1, NotChecked=38, Total=462 [2023-02-18 20:43:19,786 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 229 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 20:43:19,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1073 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1376 Invalid, 0 Unknown, 238 Unchecked, 0.8s Time] [2023-02-18 20:43:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-18 20:43:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 227. [2023-02-18 20:43:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 149 states have (on average 1.5503355704697988) internal successors, (231), 218 states have internal predecessors, (231), 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) [2023-02-18 20:43:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 247 transitions. [2023-02-18 20:43:19,795 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 247 transitions. Word has length 148 [2023-02-18 20:43:19,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:43:19,795 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 247 transitions. [2023-02-18 20:43:19,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 20:43:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 247 transitions. [2023-02-18 20:43:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-18 20:43:19,797 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:43:19,797 INFO L195 NwaCegarLoop]: trace histogram [62, 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, 1, 1, 1, 1, 1] [2023-02-18 20:43:19,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 20:43:20,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 20:43:20,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:43:20,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:43:20,007 INFO L85 PathProgramCache]: Analyzing trace with hash 688847742, now seen corresponding path program 1 times [2023-02-18 20:43:20,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:43:20,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504303629] [2023-02-18 20:43:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:43:20,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:43:20,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:43:20,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239320577] [2023-02-18 20:43:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:43:20,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:43:20,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:43:20,050 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:43:20,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 20:43:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:43:20,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 20:43:20,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:43:20,704 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8918 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_8918)))) is different from true [2023-02-18 20:43:20,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:43:20,730 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 39 [2023-02-18 20:43:20,740 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8919 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_8919)))) is different from true [2023-02-18 20:43:20,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:43:20,748 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 39 [2023-02-18 20:43:20,756 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8920 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_8920))) is different from true [2023-02-18 20:43:20,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:43:20,782 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 28 [2023-02-18 20:43:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 1077 proven. 127 refuted. 0 times theorem prover too weak. 487 trivial. 707 not checked. [2023-02-18 20:43:20,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:43:20,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:43:20,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504303629] [2023-02-18 20:43:20,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:43:20,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239320577] [2023-02-18 20:43:20,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239320577] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:43:20,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:43:20,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-18 20:43:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594494394] [2023-02-18 20:43:20,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:43:20,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 20:43:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:43:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 20:43:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=180, Unknown=3, NotChecked=84, Total=306 [2023-02-18 20:43:20,872 INFO L87 Difference]: Start difference. First operand 227 states and 247 transitions. Second operand has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 20:43:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:43:21,488 INFO L93 Difference]: Finished difference Result 259 states and 285 transitions. [2023-02-18 20:43:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 20:43:21,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 149 [2023-02-18 20:43:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:43:21,490 INFO L225 Difference]: With dead ends: 259 [2023-02-18 20:43:21,490 INFO L226 Difference]: Without dead ends: 259 [2023-02-18 20:43:21,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 166 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=412, Unknown=3, NotChecked=132, Total=650 [2023-02-18 20:43:21,491 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 221 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 22 mSolverCounterUnsat, 38 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 38 IncrementalHoareTripleChecker+Unknown, 671 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:43:21,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1217 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 879 Invalid, 38 Unknown, 671 Unchecked, 0.5s Time] [2023-02-18 20:43:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-18 20:43:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 223. [2023-02-18 20:43:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 149 states have (on average 1.523489932885906) internal successors, (227), 214 states have internal predecessors, (227), 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) [2023-02-18 20:43:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 243 transitions. [2023-02-18 20:43:21,495 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 243 transitions. Word has length 149 [2023-02-18 20:43:21,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:43:21,495 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 243 transitions. [2023-02-18 20:43:21,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 20:43:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 243 transitions. [2023-02-18 20:43:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-18 20:43:21,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:43:21,496 INFO L195 NwaCegarLoop]: trace histogram [62, 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, 1, 1, 1, 1, 1] [2023-02-18 20:43:21,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 20:43:21,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 20:43:21,697 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:43:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:43:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash 688847743, now seen corresponding path program 1 times [2023-02-18 20:43:21,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:43:21,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083927815] [2023-02-18 20:43:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:43:21,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:43:21,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:43:21,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878412370] [2023-02-18 20:43:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:43:21,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:43:21,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:43:21,754 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:43:21,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 20:43:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:43:26,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 123 conjunts are in the unsatisfiable core [2023-02-18 20:43:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:43:26,778 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 [2023-02-18 20:43:44,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:43:44,824 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 [2023-02-18 20:43:44,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:43:44,827 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 39 [2023-02-18 20:43:44,907 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9770 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= 0 (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_9770)))) is different from true [2023-02-18 20:43:44,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 20:43:44,921 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 [2023-02-18 20:43:44,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:43:44,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 75 [2023-02-18 20:43:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 896 proven. 777 refuted. 0 times theorem prover too weak. 337 trivial. 388 not checked. [2023-02-18 20:43:45,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:43:45,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:43:45,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083927815] [2023-02-18 20:43:45,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:43:45,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878412370] [2023-02-18 20:43:45,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878412370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:43:45,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:43:45,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2023-02-18 20:43:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603769985] [2023-02-18 20:43:45,104 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:43:45,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 20:43:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:43:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 20:43:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2200, Unknown=9, NotChecked=94, Total=2450 [2023-02-18 20:43:45,105 INFO L87 Difference]: Start difference. First operand 223 states and 243 transitions. Second operand has 48 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 46 states have internal predecessors, (94), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 20:43:47,144 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] [2023-02-18 20:43:49,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:53,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:43:57,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:01,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:05,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:07,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:11,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:16,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:20,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:24,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:28,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:32,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:36,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:40,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:44,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:47,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:49,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:51,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:44:54,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:44:54,369 INFO L93 Difference]: Finished difference Result 255 states and 283 transitions. [2023-02-18 20:44:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 20:44:54,370 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 46 states have internal predecessors, (94), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 149 [2023-02-18 20:44:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:44:54,372 INFO L225 Difference]: With dead ends: 255 [2023-02-18 20:44:54,372 INFO L226 Difference]: Without dead ends: 234 [2023-02-18 20:44:54,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 109 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=318, Invalid=3825, Unknown=21, NotChecked=126, Total=4290 [2023-02-18 20:44:54,373 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 89 mSDsluCounter, 4022 mSDsCounter, 0 mSdLazyCounter, 3252 mSolverCounterSat, 10 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 4208 SdHoareTripleChecker+Invalid, 3488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3252 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 42.4s IncrementalHoareTripleChecker+Time [2023-02-18 20:44:54,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 4208 Invalid, 3488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3252 Invalid, 20 Unknown, 206 Unchecked, 42.4s Time] [2023-02-18 20:44:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-18 20:44:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2023-02-18 20:44:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 153 states have (on average 1.5098039215686274) internal successors, (231), 219 states have internal predecessors, (231), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2023-02-18 20:44:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 250 transitions. [2023-02-18 20:44:54,378 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 250 transitions. Word has length 149 [2023-02-18 20:44:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:44:54,378 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 250 transitions. [2023-02-18 20:44:54,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 46 states have internal predecessors, (94), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 20:44:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 250 transitions. [2023-02-18 20:44:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-18 20:44:54,379 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:44:54,379 INFO L195 NwaCegarLoop]: trace histogram [63, 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, 1, 1, 1, 1, 1] [2023-02-18 20:44:54,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 20:44:54,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 20:44:54,597 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:44:54,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:44:54,597 INFO L85 PathProgramCache]: Analyzing trace with hash 540188121, now seen corresponding path program 2 times [2023-02-18 20:44:54,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:44:54,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494071436] [2023-02-18 20:44:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:44:54,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:44:54,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:44:54,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105721148] [2023-02-18 20:44:54,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:44:54,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:44:54,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:44:54,648 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:44:54,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 20:44:56,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:44:56,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:44:56,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 133 conjunts are in the unsatisfiable core [2023-02-18 20:44:56,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:44:56,412 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 [2023-02-18 20:45:10,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:45:10,023 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 32 [2023-02-18 20:45:10,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:45:10,029 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 39 [2023-02-18 20:45:10,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:45:10,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 72 [2023-02-18 20:45:10,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 20:45:10,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2023-02-18 20:45:11,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-18 20:45:11,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 97 [2023-02-18 20:45:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 1259 proven. 589 refuted. 7 times theorem prover too weak. 611 trivial. 0 not checked. [2023-02-18 20:45:12,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:45:12,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:45:12,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494071436] [2023-02-18 20:45:12,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 20:45:12,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105721148] [2023-02-18 20:45:12,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105721148] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:45:12,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 20:45:12,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2023-02-18 20:45:12,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956501629] [2023-02-18 20:45:12,239 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 20:45:12,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 20:45:12,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:45:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 20:45:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2383, Unknown=10, NotChecked=0, Total=2550 [2023-02-18 20:45:12,241 INFO L87 Difference]: Start difference. First operand 228 states and 250 transitions. Second operand has 49 states, 48 states have (on average 1.75) internal successors, (84), 45 states have internal predecessors, (84), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 20:45:14,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:16,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:18,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:23,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:25,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:30,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:32,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:36,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:38,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:42,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:46,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:48,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:53,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:55,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:45:57,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:02,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:05,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:07,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:09,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:11,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:16,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:18,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:21,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:24,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:26,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:33,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-18 20:46:35,590 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] [2023-02-18 20:46:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:46:41,241 INFO L93 Difference]: Finished difference Result 272 states and 308 transitions. [2023-02-18 20:46:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 20:46:41,242 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.75) internal successors, (84), 45 states have internal predecessors, (84), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 150 [2023-02-18 20:46:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:46:41,243 INFO L225 Difference]: With dead ends: 272 [2023-02-18 20:46:41,243 INFO L226 Difference]: Without dead ends: 252 [2023-02-18 20:46:41,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=571, Invalid=6216, Unknown=19, NotChecked=0, Total=6806 [2023-02-18 20:46:41,244 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 172 mSDsluCounter, 2866 mSDsCounter, 0 mSdLazyCounter, 4309 mSolverCounterSat, 15 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 3061 SdHoareTripleChecker+Invalid, 4350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4309 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.2s IncrementalHoareTripleChecker+Time [2023-02-18 20:46:41,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 3061 Invalid, 4350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4309 Invalid, 26 Unknown, 0 Unchecked, 64.2s Time] [2023-02-18 20:46:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-02-18 20:46:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 223. [2023-02-18 20:46:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 149 states have (on average 1.523489932885906) internal successors, (227), 214 states have internal predecessors, (227), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-02-18 20:46:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 242 transitions. [2023-02-18 20:46:41,248 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 242 transitions. Word has length 150 [2023-02-18 20:46:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:46:41,257 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 242 transitions. [2023-02-18 20:46:41,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.75) internal successors, (84), 45 states have internal predecessors, (84), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 20:46:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 242 transitions. [2023-02-18 20:46:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-02-18 20:46:41,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:46:41,258 INFO L195 NwaCegarLoop]: trace histogram [64, 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, 1, 1, 1, 1, 1] [2023-02-18 20:46:41,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-18 20:46:41,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:46:41,466 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-18 20:46:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:46:41,466 INFO L85 PathProgramCache]: Analyzing trace with hash 226707135, now seen corresponding path program 3 times [2023-02-18 20:46:41,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:46:41,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862547285] [2023-02-18 20:46:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:46:41,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:46:41,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 20:46:41,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741883113] [2023-02-18 20:46:41,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:46:41,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:46:41,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:46:41,530 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:46:41,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process