./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-2.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-0235-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 08:19:19,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 08:19:19,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 08:19:19,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 08:19:19,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 08:19:19,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 08:19:19,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 08:19:19,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 08:19:19,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 08:19:19,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 08:19:19,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 08:19:19,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 08:19:19,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 08:19:19,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 08:19:19,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 08:19:19,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 08:19:19,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 08:19:19,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 08:19:19,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 08:19:19,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 08:19:19,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 08:19:20,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 08:19:20,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 08:19:20,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 08:19:20,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 08:19:20,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 08:19:20,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 08:19:20,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 08:19:20,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 08:19:20,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 08:19:20,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 08:19:20,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 08:19:20,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 08:19:20,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 08:19:20,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 08:19:20,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 08:19:20,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 08:19:20,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 08:19:20,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 08:19:20,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 08:19:20,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 08:19:20,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 08:19:20,047 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 08:19:20,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 08:19:20,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 08:19:20,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 08:19:20,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 08:19:20,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 08:19:20,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 08:19:20,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 08:19:20,050 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 08:19:20,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 08:19:20,051 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 08:19:20,051 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 08:19:20,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 08:19:20,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 08:19:20,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 08:19:20,052 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 08:19:20,052 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 08:19:20,052 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 08:19:20,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 08:19:20,053 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 08:19:20,053 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 08:19:20,053 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 08:19:20,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 08:19:20,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 08:19:20,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 08:19:20,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:19:20,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 08:19:20,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 08:19:20,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 08:19:20,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 08:19:20,055 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 08:19:20,055 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 08:19:20,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 08:19:20,056 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 08:19:20,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2023-02-17 08:19:20,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 08:19:20,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 08:19:20,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 08:19:20,323 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 08:19:20,324 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 08:19:20,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-2.i [2023-02-17 08:19:21,551 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 08:19:21,837 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 08:19:21,837 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i [2023-02-17 08:19:21,850 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd5019e69/1ae39f6f909c49f7a27bf03ba6f53400/FLAGda9076de4 [2023-02-17 08:19:21,863 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd5019e69/1ae39f6f909c49f7a27bf03ba6f53400 [2023-02-17 08:19:21,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 08:19:21,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 08:19:21,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 08:19:21,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 08:19:21,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 08:19:21,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:19:21" (1/1) ... [2023-02-17 08:19:21,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296f945f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:21, skipping insertion in model container [2023-02-17 08:19:21,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:19:21" (1/1) ... [2023-02-17 08:19:21,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 08:19:21,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 08:19:22,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:19:22,291 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 08:19:22,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:19:22,394 INFO L208 MainTranslator]: Completed translation [2023-02-17 08:19:22,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22 WrapperNode [2023-02-17 08:19:22,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 08:19:22,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 08:19:22,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 08:19:22,396 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 08:19:22,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,485 INFO L138 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 237 [2023-02-17 08:19:22,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 08:19:22,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 08:19:22,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 08:19:22,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 08:19:22,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,549 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 08:19:22,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 08:19:22,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 08:19:22,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 08:19:22,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (1/1) ... [2023-02-17 08:19:22,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:19:22,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:19:22,593 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) [2023-02-17 08:19:22,608 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 [2023-02-17 08:19:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 08:19:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 08:19:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 08:19:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 08:19:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-02-17 08:19:22,639 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-02-17 08:19:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 08:19:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 08:19:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-02-17 08:19:22,640 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-02-17 08:19:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 08:19:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 08:19:22,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 08:19:22,826 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 08:19:22,828 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 08:19:23,369 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 08:19:23,377 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 08:19:23,377 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2023-02-17 08:19:23,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:19:23 BoogieIcfgContainer [2023-02-17 08:19:23,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 08:19:23,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 08:19:23,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 08:19:23,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 08:19:23,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:19:21" (1/3) ... [2023-02-17 08:19:23,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc3c944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:19:23, skipping insertion in model container [2023-02-17 08:19:23,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:19:22" (2/3) ... [2023-02-17 08:19:23,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc3c944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:19:23, skipping insertion in model container [2023-02-17 08:19:23,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:19:23" (3/3) ... [2023-02-17 08:19:23,387 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2023-02-17 08:19:23,403 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 08:19:23,403 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2023-02-17 08:19:23,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 08:19:23,470 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;@650c0f82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 08:19:23,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2023-02-17 08:19:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:19:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 08:19:23,481 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:19:23,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 08:19:23,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:19:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:19:23,487 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2023-02-17 08:19:23,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:19:23,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729606115] [2023-02-17 08:19:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:19:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:19:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:19:23,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:19:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729606115] [2023-02-17 08:19:23,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729606115] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:19:23,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:19:23,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:19:23,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843435927] [2023-02-17 08:19:23,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:19:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 08:19:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:19:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 08:19:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 08:19:23,640 INFO L87 Difference]: Start difference. First operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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) [2023-02-17 08:19:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:19:23,675 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2023-02-17 08:19:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 08:19:23,680 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 [2023-02-17 08:19:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:19:23,688 INFO L225 Difference]: With dead ends: 238 [2023-02-17 08:19:23,689 INFO L226 Difference]: Without dead ends: 236 [2023-02-17 08:19:23,690 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 [2023-02-17 08:19:23,693 INFO L413 NwaCegarLoop]: 268 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, 268 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 [2023-02-17 08:19:23,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:19:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-02-17 08:19:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2023-02-17 08:19:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 1.7925925925925925) internal successors, (242), 221 states have internal predecessors, (242), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:19:23,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2023-02-17 08:19:23,738 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 4 [2023-02-17 08:19:23,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:19:23,738 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2023-02-17 08:19:23,739 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) [2023-02-17 08:19:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2023-02-17 08:19:23,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:19:23,739 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:19:23,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:19:23,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 08:19:23,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:19:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:19:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash 889937946, now seen corresponding path program 1 times [2023-02-17 08:19:23,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:19:23,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647352714] [2023-02-17 08:19:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:23,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:19:23,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:19:23,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053854265] [2023-02-17 08:19:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:23,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:19:23,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:19:23,760 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) [2023-02-17 08:19:23,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 08:19:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:19:23,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 08:19:23,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:19:23,903 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 [2023-02-17 08:19:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:19:23,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:19:23,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:19:23,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647352714] [2023-02-17 08:19:23,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:19:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053854265] [2023-02-17 08:19:23,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053854265] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:19:23,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:19:23,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:19:23,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562252084] [2023-02-17 08:19:23,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:19:23,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:19:23,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:19:23,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:19:23,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:19:23,916 INFO L87 Difference]: Start difference. First operand 236 states and 266 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) [2023-02-17 08:19:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:19:24,082 INFO L93 Difference]: Finished difference Result 235 states and 265 transitions. [2023-02-17 08:19:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:19:24,083 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 [2023-02-17 08:19:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:19:24,085 INFO L225 Difference]: With dead ends: 235 [2023-02-17 08:19:24,087 INFO L226 Difference]: Without dead ends: 235 [2023-02-17 08:19:24,087 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 [2023-02-17 08:19:24,088 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 9 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:19:24,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 428 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:19:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-02-17 08:19:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2023-02-17 08:19:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 135 states have (on average 1.7851851851851852) internal successors, (241), 220 states have internal predecessors, (241), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:19:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2023-02-17 08:19:24,112 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 6 [2023-02-17 08:19:24,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:19:24,112 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2023-02-17 08:19:24,112 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) [2023-02-17 08:19:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2023-02-17 08:19:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 08:19:24,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:19:24,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:19:24,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 08:19:24,320 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 [2023-02-17 08:19:24,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:19:24,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:19:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1818272976, now seen corresponding path program 1 times [2023-02-17 08:19:24,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:19:24,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668943956] [2023-02-17 08:19:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:24,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:19:24,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:19:24,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554759049] [2023-02-17 08:19:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:24,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:19:24,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:19:24,377 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) [2023-02-17 08:19:24,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 08:19:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:19:24,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-17 08:19:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:19:24,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-17 08:19:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:19:24,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:19:24,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:19:24,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668943956] [2023-02-17 08:19:24,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:19:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554759049] [2023-02-17 08:19:24,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554759049] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:19:24,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:19:24,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:19:24,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486403192] [2023-02-17 08:19:24,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:19:24,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:19:24,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:19:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:19:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:19:24,506 INFO L87 Difference]: Start difference. First operand 235 states and 265 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) [2023-02-17 08:19:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:19:24,649 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2023-02-17 08:19:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:19:24,649 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 [2023-02-17 08:19:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:19:24,651 INFO L225 Difference]: With dead ends: 244 [2023-02-17 08:19:24,651 INFO L226 Difference]: Without dead ends: 244 [2023-02-17 08:19:24,652 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 [2023-02-17 08:19:24,654 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 16 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:19:24,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 693 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:19:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-17 08:19:24,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2023-02-17 08:19:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 143 states have (on average 1.7482517482517483) internal successors, (250), 228 states have internal predecessors, (250), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:19:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2023-02-17 08:19:24,686 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 7 [2023-02-17 08:19:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:19:24,689 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2023-02-17 08:19:24,689 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) [2023-02-17 08:19:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2023-02-17 08:19:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-17 08:19:24,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:19:24,692 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] [2023-02-17 08:19:24,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 08:19:24,901 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 [2023-02-17 08:19:24,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:19:24,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:19:24,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1632464615, now seen corresponding path program 1 times [2023-02-17 08:19:24,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:19:24,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200825895] [2023-02-17 08:19:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:24,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:19:24,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:19:24,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23435023] [2023-02-17 08:19:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:24,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:19:24,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:19:24,969 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) [2023-02-17 08:19:24,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 08:19:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:19:25,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 08:19:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:19:25,188 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 [2023-02-17 08:19:25,244 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 [2023-02-17 08:19:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 08:19:25,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:19:25,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:19:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200825895] [2023-02-17 08:19:25,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:19:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23435023] [2023-02-17 08:19:25,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23435023] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:19:25,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:19:25,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:19:25,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433365855] [2023-02-17 08:19:25,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:19:25,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:19:25,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:19:25,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:19:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:19:25,466 INFO L87 Difference]: Start difference. First operand 244 states and 274 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) [2023-02-17 08:19:27,642 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] [2023-02-17 08:19:28,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:19:28,300 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2023-02-17 08:19:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:19:28,301 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 [2023-02-17 08:19:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:19:28,303 INFO L225 Difference]: With dead ends: 256 [2023-02-17 08:19:28,303 INFO L226 Difference]: Without dead ends: 246 [2023-02-17 08:19:28,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:19:28,304 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 19 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-17 08:19:28,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 921 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 127 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2023-02-17 08:19:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-17 08:19:28,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2023-02-17 08:19:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 145 states have (on average 1.7379310344827585) internal successors, (252), 230 states have internal predecessors, (252), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:19:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 276 transitions. [2023-02-17 08:19:28,314 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 276 transitions. Word has length 66 [2023-02-17 08:19:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:19:28,315 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 276 transitions. [2023-02-17 08:19:28,315 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) [2023-02-17 08:19:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 276 transitions. [2023-02-17 08:19:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-17 08:19:28,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:19:28,317 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] [2023-02-17 08:19:28,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 08:19:28,525 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 [2023-02-17 08:19:28,525 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:19:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:19:28,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1536774091, now seen corresponding path program 1 times [2023-02-17 08:19:28,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:19:28,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523736721] [2023-02-17 08:19:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:28,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:19:28,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:19:28,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677917496] [2023-02-17 08:19:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:28,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:19:28,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:19:28,551 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) [2023-02-17 08:19:28,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 08:19:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:19:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 08:19:28,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:19:28,801 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 [2023-02-17 08:19:28,811 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 [2023-02-17 08:19:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-17 08:19:28,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:19:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-02-17 08:19:28,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:19:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523736721] [2023-02-17 08:19:28,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:19:28,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677917496] [2023-02-17 08:19:28,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677917496] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:19:28,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:19:28,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-02-17 08:19:28,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498075329] [2023-02-17 08:19:28,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:19:28,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 08:19:28,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:19:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 08:19:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:19:28,995 INFO L87 Difference]: Start difference. First operand 246 states and 276 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) [2023-02-17 08:19:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:19:29,305 INFO L93 Difference]: Finished difference Result 272 states and 304 transitions. [2023-02-17 08:19:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:19:29,306 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 [2023-02-17 08:19:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:19:29,308 INFO L225 Difference]: With dead ends: 272 [2023-02-17 08:19:29,308 INFO L226 Difference]: Without dead ends: 252 [2023-02-17 08:19:29,308 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 [2023-02-17 08:19:29,309 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 38 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:19:29,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1183 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:19:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-02-17 08:19:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-02-17 08:19:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 236 states have internal predecessors, (258), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:19:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 282 transitions. [2023-02-17 08:19:29,317 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 282 transitions. Word has length 71 [2023-02-17 08:19:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:19:29,317 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 282 transitions. [2023-02-17 08:19:29,318 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) [2023-02-17 08:19:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 282 transitions. [2023-02-17 08:19:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-17 08:19:29,319 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:19:29,320 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] [2023-02-17 08:19:29,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 08:19:29,528 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 [2023-02-17 08:19:29,528 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:19:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:19:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1330470809, now seen corresponding path program 2 times [2023-02-17 08:19:29,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:19:29,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575044804] [2023-02-17 08:19:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:29,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:19:29,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:19:29,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937498163] [2023-02-17 08:19:29,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:19:29,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:19:29,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:19:29,563 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) [2023-02-17 08:19:29,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 08:19:30,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:19:30,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:19:30,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 08:19:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:19:30,417 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 [2023-02-17 08:19:32,454 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 [2023-02-17 08:19:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 255 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-17 08:19:33,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:19:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 79 proven. 74 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-17 08:19:33,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:19:33,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575044804] [2023-02-17 08:19:33,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:19:33,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937498163] [2023-02-17 08:19:33,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937498163] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:19:33,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:19:33,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-02-17 08:19:33,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23611189] [2023-02-17 08:19:33,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:19:33,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 08:19:33,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:19:33,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 08:19:33,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=295, Unknown=1, NotChecked=0, Total=380 [2023-02-17 08:19:33,864 INFO L87 Difference]: Start difference. First operand 252 states and 282 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) [2023-02-17 08:19:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:19:36,069 INFO L93 Difference]: Finished difference Result 280 states and 314 transitions. [2023-02-17 08:19:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 08:19:36,069 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 [2023-02-17 08:19:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:19:36,070 INFO L225 Difference]: With dead ends: 280 [2023-02-17 08:19:36,071 INFO L226 Difference]: Without dead ends: 260 [2023-02-17 08:19:36,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=203, Invalid=666, Unknown=1, NotChecked=0, Total=870 [2023-02-17 08:19:36,072 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 44 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:19:36,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2680 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-17 08:19:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-17 08:19:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-02-17 08:19:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 159 states have (on average 1.6729559748427674) internal successors, (266), 244 states have internal predecessors, (266), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:19:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 290 transitions. [2023-02-17 08:19:36,080 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 290 transitions. Word has length 86 [2023-02-17 08:19:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:19:36,081 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 290 transitions. [2023-02-17 08:19:36,082 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) [2023-02-17 08:19:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 290 transitions. [2023-02-17 08:19:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-17 08:19:36,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:19:36,089 INFO L195 NwaCegarLoop]: trace histogram [40, 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] [2023-02-17 08:19:36,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 08:19:36,297 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 [2023-02-17 08:19:36,298 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:19:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:19:36,298 INFO L85 PathProgramCache]: Analyzing trace with hash 239276519, now seen corresponding path program 3 times [2023-02-17 08:19:36,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:19:36,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280333005] [2023-02-17 08:19:36,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:36,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:19:36,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:19:36,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633415395] [2023-02-17 08:19:36,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 08:19:36,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:19:36,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:19:36,367 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) [2023-02-17 08:19:36,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 08:19:36,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 08:19:36,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:19:36,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 08:19:36,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:19:36,579 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 [2023-02-17 08:19:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2023-02-17 08:19:36,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:19:36,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:19:36,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280333005] [2023-02-17 08:19:36,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:19:36,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633415395] [2023-02-17 08:19:36,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633415395] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:19:36,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:19:36,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:19:36,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511540897] [2023-02-17 08:19:36,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:19:36,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:19:36,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:19:36,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:19:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:19:36,590 INFO L87 Difference]: Start difference. First operand 260 states and 290 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) [2023-02-17 08:19:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:19:36,733 INFO L93 Difference]: Finished difference Result 259 states and 289 transitions. [2023-02-17 08:19:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:19:36,734 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 106 [2023-02-17 08:19:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:19:36,735 INFO L225 Difference]: With dead ends: 259 [2023-02-17 08:19:36,735 INFO L226 Difference]: Without dead ends: 259 [2023-02-17 08:19:36,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:19:36,736 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 16 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:19:36,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 677 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:19:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-17 08:19:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-02-17 08:19:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 243 states have internal predecessors, (265), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:19:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 289 transitions. [2023-02-17 08:19:36,744 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 289 transitions. Word has length 106 [2023-02-17 08:19:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:19:36,745 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 289 transitions. [2023-02-17 08:19:36,745 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) [2023-02-17 08:19:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 289 transitions. [2023-02-17 08:19:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-17 08:19:36,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:19:36,747 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-02-17 08:19:36,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 08:19:36,953 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 [2023-02-17 08:19:36,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:19:36,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:19:36,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1881445206, now seen corresponding path program 1 times [2023-02-17 08:19:36,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:19:36,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031450000] [2023-02-17 08:19:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:36,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:19:37,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:19:37,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566178820] [2023-02-17 08:19:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:37,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:19:37,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:19:37,011 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) [2023-02-17 08:19:37,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 08:19:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:19:37,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 08:19:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:19:37,399 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1497 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1497))) is different from true [2023-02-17 08:19:37,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:19:37,442 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 [2023-02-17 08:19:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 87 refuted. 0 times theorem prover too weak. 754 trivial. 1 not checked. [2023-02-17 08:19:37,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:19:37,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:19:37,566 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 [2023-02-17 08:19:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 88 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2023-02-17 08:19:37,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:19:37,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031450000] [2023-02-17 08:19:37,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:19:37,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566178820] [2023-02-17 08:19:37,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566178820] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:19:37,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:19:37,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-02-17 08:19:37,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285860018] [2023-02-17 08:19:37,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:19:37,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 08:19:37,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:19:37,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 08:19:37,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-02-17 08:19:37,581 INFO L87 Difference]: Start difference. First operand 259 states and 289 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) [2023-02-17 08:19:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:19:38,520 INFO L93 Difference]: Finished difference Result 412 states and 476 transitions. [2023-02-17 08:19:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 08:19:38,521 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 121 [2023-02-17 08:19:38,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:19:38,524 INFO L225 Difference]: With dead ends: 412 [2023-02-17 08:19:38,524 INFO L226 Difference]: Without dead ends: 412 [2023-02-17 08:19:38,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2023-02-17 08:19:38,525 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 355 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 38 mSolverCounterUnsat, 41 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 41 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 08:19:38,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1926 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1206 Invalid, 41 Unknown, 309 Unchecked, 0.8s Time] [2023-02-17 08:19:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-17 08:19:38,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 257. [2023-02-17 08:19:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 159 states have (on average 1.6540880503144655) internal successors, (263), 241 states have internal predecessors, (263), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:19:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 287 transitions. [2023-02-17 08:19:38,535 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 287 transitions. Word has length 121 [2023-02-17 08:19:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:19:38,535 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 287 transitions. [2023-02-17 08:19:38,536 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) [2023-02-17 08:19:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 287 transitions. [2023-02-17 08:19:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-17 08:19:38,537 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:19:38,537 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-02-17 08:19:38,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 08:19:38,746 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 [2023-02-17 08:19:38,747 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:19:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:19:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1881445205, now seen corresponding path program 1 times [2023-02-17 08:19:38,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:19:38,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212207450] [2023-02-17 08:19:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:19:38,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:19:38,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730634625] [2023-02-17 08:19:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:19:38,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:19:38,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:19:38,789 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) [2023-02-17 08:19:38,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 08:19:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:19:42,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-17 08:19:42,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:19:42,343 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 [2023-02-17 08:19:52,942 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2102 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_2102)))) is different from true [2023-02-17 08:19:53,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:19:53,011 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 [2023-02-17 08:19:53,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:19:53,016 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 [2023-02-17 08:19:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 590 proven. 316 refuted. 0 times theorem prover too weak. 494 trivial. 151 not checked. [2023-02-17 08:19:53,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:19:53,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:19:53,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212207450] [2023-02-17 08:19:53,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:19:53,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730634625] [2023-02-17 08:19:53,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730634625] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:19:53,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:19:53,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-17 08:19:53,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203178841] [2023-02-17 08:19:53,835 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 08:19:53,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 08:19:53,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:19:53,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 08:19:53,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=735, Unknown=5, NotChecked=54, Total=870 [2023-02-17 08:19:53,836 INFO L87 Difference]: Start difference. First operand 257 states and 287 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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) [2023-02-17 08:19:55,864 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] [2023-02-17 08:19:57,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:19:59,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:02,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:04,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:06,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:08,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:12,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:14,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:18,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:20,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:33,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:35,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:37,329 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] [2023-02-17 08:20:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:20:38,028 INFO L93 Difference]: Finished difference Result 408 states and 474 transitions. [2023-02-17 08:20:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 08:20:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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 121 [2023-02-17 08:20:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:20:38,031 INFO L225 Difference]: With dead ends: 408 [2023-02-17 08:20:38,031 INFO L226 Difference]: Without dead ends: 408 [2023-02-17 08:20:38,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=187, Invalid=1614, Unknown=9, NotChecked=82, Total=1892 [2023-02-17 08:20:38,033 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 381 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 40 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 4583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 33.6s IncrementalHoareTripleChecker+Time [2023-02-17 08:20:38,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1187 Invalid, 4583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4215 Invalid, 14 Unknown, 314 Unchecked, 33.6s Time] [2023-02-17 08:20:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-02-17 08:20:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 255. [2023-02-17 08:20:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 159 states have (on average 1.6415094339622642) internal successors, (261), 239 states have internal predecessors, (261), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:20:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 285 transitions. [2023-02-17 08:20:38,042 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 285 transitions. Word has length 121 [2023-02-17 08:20:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:20:38,043 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 285 transitions. [2023-02-17 08:20:38,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 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) [2023-02-17 08:20:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 285 transitions. [2023-02-17 08:20:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-17 08:20:38,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:20:38,044 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:20:38,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 08:20:38,261 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 [2023-02-17 08:20:38,261 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:20:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:20:38,261 INFO L85 PathProgramCache]: Analyzing trace with hash 112388875, now seen corresponding path program 1 times [2023-02-17 08:20:38,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:20:38,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346187013] [2023-02-17 08:20:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:20:38,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:20:38,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:20:38,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055413667] [2023-02-17 08:20:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:20:38,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:20:38,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:20:38,307 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) [2023-02-17 08:20:38,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 08:20:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:20:38,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-17 08:20:38,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:20:38,724 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2718 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2718))) is different from true [2023-02-17 08:20:38,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:20:38,765 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 [2023-02-17 08:20:38,781 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2719 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2719))) is different from true [2023-02-17 08:20:38,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:20:38,847 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 [2023-02-17 08:20:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 174 refuted. 0 times theorem prover too weak. 574 trivial. 3 not checked. [2023-02-17 08:20:38,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:20:38,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:20:38,991 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 [2023-02-17 08:20:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 176 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2023-02-17 08:20:38,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:20:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346187013] [2023-02-17 08:20:38,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:20:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055413667] [2023-02-17 08:20:38,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055413667] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:20:38,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:20:38,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2023-02-17 08:20:38,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241855019] [2023-02-17 08:20:38,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:20:38,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 08:20:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:20:38,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 08:20:38,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=154, Unknown=2, NotChecked=50, Total=240 [2023-02-17 08:20:38,999 INFO L87 Difference]: Start difference. First operand 255 states and 285 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-17 08:20:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:20:39,758 INFO L93 Difference]: Finished difference Result 407 states and 471 transitions. [2023-02-17 08:20:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 08:20:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 123 [2023-02-17 08:20:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:20:39,760 INFO L225 Difference]: With dead ends: 407 [2023-02-17 08:20:39,761 INFO L226 Difference]: Without dead ends: 407 [2023-02-17 08:20:39,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 223 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=372, Unknown=2, NotChecked=82, Total=552 [2023-02-17 08:20:39,762 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 571 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 888 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:20:39,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1810 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1272 Invalid, 0 Unknown, 888 Unchecked, 0.7s Time] [2023-02-17 08:20:39,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-02-17 08:20:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 252. [2023-02-17 08:20:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 159 states have (on average 1.6226415094339623) internal successors, (258), 236 states have internal predecessors, (258), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:20:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 282 transitions. [2023-02-17 08:20:39,771 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 282 transitions. Word has length 123 [2023-02-17 08:20:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:20:39,771 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 282 transitions. [2023-02-17 08:20:39,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-17 08:20:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 282 transitions. [2023-02-17 08:20:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-17 08:20:39,772 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:20:39,773 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:20:39,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 08:20:39,987 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 [2023-02-17 08:20:39,987 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:20:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:20:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash 112388876, now seen corresponding path program 1 times [2023-02-17 08:20:39,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:20:39,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837928392] [2023-02-17 08:20:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:20:39,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:20:40,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:20:40,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359000395] [2023-02-17 08:20:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:20:40,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:20:40,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:20:40,050 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) [2023-02-17 08:20:40,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 08:20:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:20:40,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-17 08:20:40,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:20:40,505 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 [2023-02-17 08:20:44,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:20:44,990 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 [2023-02-17 08:20:44,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:20:44,995 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 [2023-02-17 08:20:45,544 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_3341 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_3341)))) is different from true [2023-02-17 08:20:45,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:20:45,611 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 [2023-02-17 08:20:45,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:20:45,618 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 [2023-02-17 08:20:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 696 proven. 284 refuted. 0 times theorem prover too weak. 359 trivial. 212 not checked. [2023-02-17 08:20:46,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:20:46,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:20:46,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837928392] [2023-02-17 08:20:46,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:20:46,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359000395] [2023-02-17 08:20:46,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359000395] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:20:46,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:20:46,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-02-17 08:20:46,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321071258] [2023-02-17 08:20:46,333 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 08:20:46,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 08:20:46,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:20:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 08:20:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=634, Unknown=2, NotChecked=50, Total=756 [2023-02-17 08:20:46,334 INFO L87 Difference]: Start difference. First operand 252 states and 282 transitions. Second operand has 26 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 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) [2023-02-17 08:20:48,365 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] [2023-02-17 08:20:50,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:54,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:20:58,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:21:00,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:21:01,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:21:05,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:21:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:21:18,535 INFO L93 Difference]: Finished difference Result 397 states and 461 transitions. [2023-02-17 08:21:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 08:21:18,535 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 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 123 [2023-02-17 08:21:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:21:18,537 INFO L225 Difference]: With dead ends: 397 [2023-02-17 08:21:18,537 INFO L226 Difference]: Without dead ends: 397 [2023-02-17 08:21:18,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=188, Invalid=1370, Unknown=6, NotChecked=76, Total=1640 [2023-02-17 08:21:18,539 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 562 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 4408 mSolverCounterSat, 68 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 4776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4408 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:21:18,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 1172 Invalid, 4776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 4408 Invalid, 6 Unknown, 294 Unchecked, 20.7s Time] [2023-02-17 08:21:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-02-17 08:21:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 250. [2023-02-17 08:21:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 159 states have (on average 1.610062893081761) internal successors, (256), 234 states have internal predecessors, (256), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:21:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 280 transitions. [2023-02-17 08:21:18,547 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 280 transitions. Word has length 123 [2023-02-17 08:21:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:21:18,548 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 280 transitions. [2023-02-17 08:21:18,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 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) [2023-02-17 08:21:18,548 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 280 transitions. [2023-02-17 08:21:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-17 08:21:18,549 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:21:18,549 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:21:18,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 08:21:18,760 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 [2023-02-17 08:21:18,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:21:18,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:21:18,761 INFO L85 PathProgramCache]: Analyzing trace with hash -158311287, now seen corresponding path program 1 times [2023-02-17 08:21:18,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:21:18,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025909138] [2023-02-17 08:21:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:21:18,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:21:18,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:21:18,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616047974] [2023-02-17 08:21:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:21:18,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:21:18,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:21:18,810 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) [2023-02-17 08:21:18,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 08:21:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:21:19,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 08:21:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:21:19,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:21:19,377 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 [2023-02-17 08:21:19,407 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3982 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_3982)))) is different from true [2023-02-17 08:21:19,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:21:19,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 45 treesize of output 137 [2023-02-17 08:21:22,840 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3983 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3983))) is different from true [2023-02-17 08:21:22,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:21:22,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 110 [2023-02-17 08:21:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 713 proven. 262 refuted. 0 times theorem prover too weak. 310 trivial. 266 not checked. [2023-02-17 08:21:23,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:21:23,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:21:23,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025909138] [2023-02-17 08:21:23,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:21:23,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616047974] [2023-02-17 08:21:23,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616047974] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:21:23,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:21:23,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-17 08:21:23,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652571040] [2023-02-17 08:21:23,405 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 08:21:23,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 08:21:23,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:21:23,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 08:21:23,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=262, Unknown=2, NotChecked=66, Total=380 [2023-02-17 08:21:23,406 INFO L87 Difference]: Start difference. First operand 250 states and 280 transitions. Second operand has 17 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 08:21:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:21:24,785 INFO L93 Difference]: Finished difference Result 400 states and 464 transitions. [2023-02-17 08:21:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 08:21:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 130 [2023-02-17 08:21:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:21:24,788 INFO L225 Difference]: With dead ends: 400 [2023-02-17 08:21:24,788 INFO L226 Difference]: Without dead ends: 400 [2023-02-17 08:21:24,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=122, Invalid=534, Unknown=2, NotChecked=98, Total=756 [2023-02-17 08:21:24,789 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 441 mSDsluCounter, 1986 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 54 mSolverCounterUnsat, 38 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 2509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 38 IncrementalHoareTripleChecker+Unknown, 856 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:21:24,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 2186 Invalid, 2509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1561 Invalid, 38 Unknown, 856 Unchecked, 1.2s Time] [2023-02-17 08:21:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-02-17 08:21:24,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 247. [2023-02-17 08:21:24,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 159 states have (on average 1.5911949685534592) internal successors, (253), 231 states have internal predecessors, (253), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:21:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 277 transitions. [2023-02-17 08:21:24,797 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 277 transitions. Word has length 130 [2023-02-17 08:21:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:21:24,798 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 277 transitions. [2023-02-17 08:21:24,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 08:21:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 277 transitions. [2023-02-17 08:21:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-17 08:21:24,799 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:21:24,799 INFO L195 NwaCegarLoop]: trace histogram [48, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:21:24,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-17 08:21:25,009 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 [2023-02-17 08:21:25,010 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:21:25,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:21:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash -158311286, now seen corresponding path program 1 times [2023-02-17 08:21:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:21:25,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675391114] [2023-02-17 08:21:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:21:25,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:21:25,050 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:21:25,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004081637] [2023-02-17 08:21:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:21:25,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:21:25,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:21:25,052 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) [2023-02-17 08:21:25,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 08:21:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:21:26,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 118 conjunts are in the unsatisfiable core [2023-02-17 08:21:26,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:21:26,497 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 [2023-02-17 08:21:35,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:21:35,623 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 [2023-02-17 08:21:35,750 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 [2023-02-17 08:21:36,325 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4629 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_4629)))) is different from true [2023-02-17 08:21:36,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:21:36,416 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 [2023-02-17 08:21:36,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:21:36,419 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 [2023-02-17 08:21:37,323 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_4630 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (and (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|)) (>= v_ArrVal_4630 (mod (* |zalloc_or_die_calloc_model_~size#1| |zalloc_or_die_calloc_model_~nmemb#1|) 4294967296)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4630)))) is different from true [2023-02-17 08:21:38,974 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_4630 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (mod (* |zalloc_or_die_calloc_model_~size#1| |zalloc_or_die_calloc_model_~nmemb#1|) 4294967296))) (and (< 7 .cse0) (>= v_ArrVal_4630 .cse0) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4630))))) is different from true [2023-02-17 08:21:39,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:21:39,104 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 [2023-02-17 08:21:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 475 proven. 564 refuted. 0 times theorem prover too weak. 138 trivial. 374 not checked. [2023-02-17 08:21:39,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:21:40,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:21:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675391114] [2023-02-17 08:21:40,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:21:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004081637] [2023-02-17 08:21:40,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004081637] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:21:40,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:21:40,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2023-02-17 08:21:40,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086112469] [2023-02-17 08:21:40,357 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 08:21:40,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-17 08:21:40,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:21:40,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-17 08:21:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1594, Unknown=20, NotChecked=246, Total=1980 [2023-02-17 08:21:40,359 INFO L87 Difference]: Start difference. First operand 247 states and 277 transitions. Second operand has 43 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:21:42,396 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] [2023-02-17 08:21:44,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:21:48,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:21:52,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:21:56,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:21:58,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:22:02,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:22:07,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:22:11,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:22:15,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:22:19,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:22:58,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:22:58,063 INFO L93 Difference]: Finished difference Result 388 states and 451 transitions. [2023-02-17 08:22:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 08:22:58,064 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 130 [2023-02-17 08:22:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:22:58,066 INFO L225 Difference]: With dead ends: 388 [2023-02-17 08:22:58,066 INFO L226 Difference]: Without dead ends: 388 [2023-02-17 08:22:58,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=273, Invalid=3012, Unknown=33, NotChecked=342, Total=3660 [2023-02-17 08:22:58,067 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 570 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 5971 mSolverCounterSat, 58 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 7239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 5971 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:22:58,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1549 Invalid, 7239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 5971 Invalid, 11 Unknown, 1199 Unchecked, 28.5s Time] [2023-02-17 08:22:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-02-17 08:22:58,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 244. [2023-02-17 08:22:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 159 states have (on average 1.5723270440251573) internal successors, (250), 228 states have internal predecessors, (250), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:22:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2023-02-17 08:22:58,075 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 130 [2023-02-17 08:22:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:22:58,076 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2023-02-17 08:22:58,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:22:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2023-02-17 08:22:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-17 08:22:58,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:22:58,077 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-02-17 08:22:58,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-17 08:22:58,293 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 [2023-02-17 08:22:58,293 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-02-17 08:22:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:22:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash -612682567, now seen corresponding path program 1 times [2023-02-17 08:22:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:22:58,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728962761] [2023-02-17 08:22:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:22:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:22:58,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 08:22:58,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037455648] [2023-02-17 08:22:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:22:58,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:22:58,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:22:58,329 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) [2023-02-17 08:22:58,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 08:23:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:23:00,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-17 08:23:00,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:23:00,332 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 [2023-02-17 08:23:14,835 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5272 Int) (v_ArrVal_5271 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_5271)) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5272)))) is different from true [2023-02-17 08:23:14,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:23:14,949 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 [2023-02-17 08:23:14,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:23:14,953 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 [2023-02-17 08:23:15,254 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5273 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_5273)))) is different from true [2023-02-17 08:23:15,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:23:15,300 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 [2023-02-17 08:23:15,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:23:15,304 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 [2023-02-17 08:23:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 618 proven. 253 refuted. 0 times theorem prover too weak. 290 trivial. 390 not checked. [2023-02-17 08:23:15,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:23:16,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:23:16,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728962761] [2023-02-17 08:23:16,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 08:23:16,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037455648] [2023-02-17 08:23:16,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037455648] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:23:16,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:23:16,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-17 08:23:16,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966082084] [2023-02-17 08:23:16,153 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 08:23:16,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 08:23:16,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:23:16,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 08:23:16,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=8, NotChecked=110, Total=930 [2023-02-17 08:23:16,154 INFO L87 Difference]: Start difference. First operand 244 states and 274 transitions. Second operand has 29 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 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) [2023-02-17 08:23:18,184 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] [2023-02-17 08:23:20,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:23:22,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:23:26,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:23:28,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:23:32,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:23:34,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:23:37,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-17 08:23:41,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]