./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0235-3.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 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:55:57,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:55:57,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:55:57,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:55:57,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:55:57,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:55:57,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:55:57,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:55:57,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:55:57,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:55:57,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:55:57,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:55:57,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:55:57,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:55:57,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:55:57,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:55:57,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:55:57,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:55:57,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:55:57,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:55:57,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:55:57,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:55:57,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:55:57,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:55:57,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:55:57,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:55:57,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:55:57,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:55:57,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:55:57,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:55:57,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:55:57,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:55:57,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:55:57,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:55:57,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:55:57,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:55:57,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:55:57,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:55:57,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:55:57,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:55:57,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:55:57,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 12:55:57,915 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:55:57,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:55:57,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:55:57,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:55:57,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:55:57,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:55:57,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:55:57,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:55:57,917 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:55:57,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:55:57,923 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:55:57,923 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 12:55:57,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:55:57,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:55:57,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:55:57,924 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 12:55:57,924 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 12:55:57,924 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 12:55:57,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:55:57,924 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 12:55:57,924 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:55:57,924 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:55:57,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:55:57,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:55:57,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:55:57,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:55:57,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:55:57,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:55:57,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:55:57,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:55:57,926 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:55:57,926 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:55:57,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:55:57,927 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:55:57,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2023-02-15 12:55:58,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:55:58,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:55:58,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:55:58,130 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:55:58,130 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:55:58,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-3.i [2023-02-15 12:55:59,168 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:55:59,355 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:55:59,355 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-3.i [2023-02-15 12:55:59,374 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/856b4e40d/0768aba08ec04f70a45885904357098b/FLAGc7b0cc174 [2023-02-15 12:55:59,383 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/856b4e40d/0768aba08ec04f70a45885904357098b [2023-02-15 12:55:59,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:55:59,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:55:59,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:55:59,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:55:59,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:55:59,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af79579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59, skipping insertion in model container [2023-02-15 12:55:59,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:55:59,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:55:59,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:55:59,688 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:55:59,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:55:59,763 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:55:59,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59 WrapperNode [2023-02-15 12:55:59,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:55:59,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:55:59,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:55:59,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:55:59,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,828 INFO L138 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 240 [2023-02-15 12:55:59,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:55:59,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:55:59,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:55:59,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:55:59,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,879 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:55:59,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:55:59,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:55:59,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:55:59,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (1/1) ... [2023-02-15 12:55:59,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:55:59,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:55:59,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 12:55:59,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 12:55:59,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 12:55:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:55:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 12:55:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 12:55:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-02-15 12:55:59,936 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-02-15 12:55:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 12:55:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 12:55:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-02-15 12:55:59,937 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-02-15 12:55:59,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:55:59,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:55:59,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:56:00,054 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:56:00,055 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:56:00,489 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:56:00,494 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:56:00,494 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2023-02-15 12:56:00,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:56:00 BoogieIcfgContainer [2023-02-15 12:56:00,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:56:00,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:56:00,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:56:00,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:56:00,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:55:59" (1/3) ... [2023-02-15 12:56:00,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779914d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:56:00, skipping insertion in model container [2023-02-15 12:56:00,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:55:59" (2/3) ... [2023-02-15 12:56:00,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779914d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:56:00, skipping insertion in model container [2023-02-15 12:56:00,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:56:00" (3/3) ... [2023-02-15 12:56:00,509 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2023-02-15 12:56:00,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:56:00,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2023-02-15 12:56:00,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:56:00,556 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;@1d4919b3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:56:00,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2023-02-15 12:56:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:56:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-15 12:56:00,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:00,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-15 12:56:00,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:56:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2023-02-15 12:56:00,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:00,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908236819] [2023-02-15 12:56:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:00,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:56:00,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:00,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908236819] [2023-02-15 12:56:00,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908236819] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:56:00,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:56:00,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:56:00,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397187573] [2023-02-15 12:56:00,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:56:00,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 12:56:00,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:00,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 12:56:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:56:00,694 INFO L87 Difference]: Start difference. First operand has 243 states, 138 states have (on average 1.8768115942028984) internal successors, (259), 227 states have internal predecessors, (259), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:56:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:00,719 INFO L93 Difference]: Finished difference Result 243 states and 274 transitions. [2023-02-15 12:56:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 12:56:00,720 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-15 12:56:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:00,726 INFO L225 Difference]: With dead ends: 243 [2023-02-15 12:56:00,727 INFO L226 Difference]: Without dead ends: 241 [2023-02-15 12:56:00,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:56:00,731 INFO L413 NwaCegarLoop]: 274 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, 274 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:00,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:56:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-02-15 12:56:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-02-15 12:56:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 137 states have (on average 1.7956204379562044) internal successors, (246), 225 states have internal predecessors, (246), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:56:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2023-02-15 12:56:00,764 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 4 [2023-02-15 12:56:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:00,765 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2023-02-15 12:56:00,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:56:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2023-02-15 12:56:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 12:56:00,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:00,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 12:56:00,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:56:00,766 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:56:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash 889942911, now seen corresponding path program 1 times [2023-02-15 12:56:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:00,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585397578] [2023-02-15 12:56:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:00,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:00,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:00,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682138464] [2023-02-15 12:56:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:00,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:00,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:00,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:00,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:56:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:00,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 12:56:00,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:00,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:56:00,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:56:00,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:00,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585397578] [2023-02-15 12:56:00,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:00,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682138464] [2023-02-15 12:56:00,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682138464] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:56:00,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:56:00,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:56:00,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416653014] [2023-02-15 12:56:00,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:56:00,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 12:56:00,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 12:56:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:56:00,912 INFO L87 Difference]: Start difference. First operand 241 states and 272 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:56:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:01,042 INFO L93 Difference]: Finished difference Result 240 states and 271 transitions. [2023-02-15 12:56:01,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 12:56:01,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 12:56:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:01,047 INFO L225 Difference]: With dead ends: 240 [2023-02-15 12:56:01,047 INFO L226 Difference]: Without dead ends: 240 [2023-02-15 12:56:01,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:56:01,050 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 9 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:01,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 438 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:56:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-15 12:56:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2023-02-15 12:56:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 137 states have (on average 1.7883211678832116) internal successors, (245), 224 states have internal predecessors, (245), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:56:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2023-02-15 12:56:01,064 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 6 [2023-02-15 12:56:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:01,068 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2023-02-15 12:56:01,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:56:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2023-02-15 12:56:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 12:56:01,069 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:01,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:56:01,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:01,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:56:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1818426896, now seen corresponding path program 1 times [2023-02-15 12:56:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:01,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586721614] [2023-02-15 12:56:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:01,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:01,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:01,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071182787] [2023-02-15 12:56:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:01,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:01,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:01,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:01,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:56:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 12:56:01,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:01,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-15 12:56:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:56:01,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:56:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:01,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586721614] [2023-02-15 12:56:01,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071182787] [2023-02-15 12:56:01,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071182787] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:56:01,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:56:01,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:56:01,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149123220] [2023-02-15 12:56:01,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:56:01,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:56:01,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:01,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:56:01,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:56:01,424 INFO L87 Difference]: Start difference. First operand 240 states and 271 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:56:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:01,548 INFO L93 Difference]: Finished difference Result 249 states and 280 transitions. [2023-02-15 12:56:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:56:01,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 12:56:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:01,550 INFO L225 Difference]: With dead ends: 249 [2023-02-15 12:56:01,550 INFO L226 Difference]: Without dead ends: 249 [2023-02-15 12:56:01,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:56:01,551 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 16 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:01,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 709 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:56:01,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-02-15 12:56:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2023-02-15 12:56:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 145 states have (on average 1.7517241379310344) internal successors, (254), 232 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:56:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 280 transitions. [2023-02-15 12:56:01,561 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 280 transitions. Word has length 7 [2023-02-15 12:56:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:01,561 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 280 transitions. [2023-02-15 12:56:01,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:56:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 280 transitions. [2023-02-15 12:56:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 12:56:01,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:01,563 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:56:01,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:01,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 12:56:01,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:56:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:01,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1283052409, now seen corresponding path program 1 times [2023-02-15 12:56:01,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:01,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498569376] [2023-02-15 12:56:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:01,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:01,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:01,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108446317] [2023-02-15 12:56:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:01,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:01,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:01,805 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:01,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:56:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:01,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 12:56:01,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:01,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:02,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 12:56:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-15 12:56:02,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:56:02,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:02,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498569376] [2023-02-15 12:56:02,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:02,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108446317] [2023-02-15 12:56:02,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108446317] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:56:02,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:56:02,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:56:02,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269011732] [2023-02-15 12:56:02,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:56:02,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:56:02,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:02,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:56:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:56:02,251 INFO L87 Difference]: Start difference. First operand 249 states and 280 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 12:56:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:05,938 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2023-02-15 12:56:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:56:05,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2023-02-15 12:56:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:05,939 INFO L225 Difference]: With dead ends: 261 [2023-02-15 12:56:05,939 INFO L226 Difference]: Without dead ends: 251 [2023-02-15 12:56:05,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:56:05,940 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 19 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:05,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 943 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-15 12:56:05,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-02-15 12:56:05,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2023-02-15 12:56:05,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 147 states have (on average 1.7414965986394557) internal successors, (256), 234 states have internal predecessors, (256), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:56:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 282 transitions. [2023-02-15 12:56:05,947 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 282 transitions. Word has length 66 [2023-02-15 12:56:05,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:05,947 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 282 transitions. [2023-02-15 12:56:05,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 12:56:05,948 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 282 transitions. [2023-02-15 12:56:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 12:56:05,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:05,949 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:56:05,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:06,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:06,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:56:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash 370417648, now seen corresponding path program 1 times [2023-02-15 12:56:06,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:06,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951700939] [2023-02-15 12:56:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:06,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:06,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:06,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681151890] [2023-02-15 12:56:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:06,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:06,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:06,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:06,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:56:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:06,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 12:56:06,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:06,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:06,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 12:56:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 12:56:06,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-02-15 12:56:06,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951700939] [2023-02-15 12:56:06,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681151890] [2023-02-15 12:56:06,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681151890] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:06,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:06,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-02-15 12:56:06,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408936276] [2023-02-15 12:56:06,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:06,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:56:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:56:06,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:56:06,708 INFO L87 Difference]: Start difference. First operand 251 states and 282 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) [2023-02-15 12:56:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:06,973 INFO L93 Difference]: Finished difference Result 277 states and 310 transitions. [2023-02-15 12:56:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 12:56:06,973 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 [2023-02-15 12:56:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:06,974 INFO L225 Difference]: With dead ends: 277 [2023-02-15 12:56:06,974 INFO L226 Difference]: Without dead ends: 257 [2023-02-15 12:56:06,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-02-15 12:56:06,975 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 28 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:06,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1889 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:56:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-15 12:56:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2023-02-15 12:56:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 153 states have (on average 1.7124183006535947) internal successors, (262), 240 states have internal predecessors, (262), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:56:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2023-02-15 12:56:06,981 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 71 [2023-02-15 12:56:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:06,981 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2023-02-15 12:56:06,982 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) [2023-02-15 12:56:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2023-02-15 12:56:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-15 12:56:06,983 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:06,983 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] [2023-02-15 12:56:06,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 12:56:07,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:07,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:56:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:07,190 INFO L85 PathProgramCache]: Analyzing trace with hash 955905991, now seen corresponding path program 2 times [2023-02-15 12:56:07,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:07,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898166685] [2023-02-15 12:56:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:07,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:07,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:07,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846885638] [2023-02-15 12:56:07,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:56:07,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:07,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:07,245 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:07,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:56:07,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:56:07,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:56:07,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 12:56:07,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:07,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:07,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 12:56:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 220 proven. 36 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-02-15 12:56:07,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 47 proven. 106 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-15 12:56:08,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:08,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898166685] [2023-02-15 12:56:08,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:08,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846885638] [2023-02-15 12:56:08,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846885638] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:08,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:08,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-02-15 12:56:08,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433287476] [2023-02-15 12:56:08,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:08,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 12:56:08,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:08,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 12:56:08,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-02-15 12:56:08,160 INFO L87 Difference]: Start difference. First operand 257 states and 288 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, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 12:56:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:08,586 INFO L93 Difference]: Finished difference Result 285 states and 320 transitions. [2023-02-15 12:56:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 12:56:08,586 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, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2023-02-15 12:56:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:08,587 INFO L225 Difference]: With dead ends: 285 [2023-02-15 12:56:08,587 INFO L226 Difference]: Without dead ends: 265 [2023-02-15 12:56:08,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2023-02-15 12:56:08,588 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 33 mSDsluCounter, 2665 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2924 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:08,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2924 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:56:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-02-15 12:56:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2023-02-15 12:56:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 161 states have (on average 1.6770186335403727) internal successors, (270), 248 states have internal predecessors, (270), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:56:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 296 transitions. [2023-02-15 12:56:08,605 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 296 transitions. Word has length 86 [2023-02-15 12:56:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:08,607 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 296 transitions. [2023-02-15 12:56:08,607 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, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 12:56:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 296 transitions. [2023-02-15 12:56:08,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-15 12:56:08,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:08,612 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] [2023-02-15 12:56:08,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:08,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:08,821 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:56:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1008033017, now seen corresponding path program 3 times [2023-02-15 12:56:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:08,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370794782] [2023-02-15 12:56:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:08,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:08,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:08,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840901065] [2023-02-15 12:56:08,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:56:08,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:08,866 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:08,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:56:09,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 12:56:09,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:56:09,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 12:56:09,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:09,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2023-02-15 12:56:09,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:56:09,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:09,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370794782] [2023-02-15 12:56:09,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:09,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840901065] [2023-02-15 12:56:09,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840901065] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:56:09,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:56:09,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:56:09,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816605016] [2023-02-15 12:56:09,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:56:09,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:56:09,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:09,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:56:09,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:56:09,061 INFO L87 Difference]: Start difference. First operand 265 states and 296 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 12:56:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:09,147 INFO L93 Difference]: Finished difference Result 264 states and 295 transitions. [2023-02-15 12:56:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:56:09,148 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 [2023-02-15 12:56:09,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:09,149 INFO L225 Difference]: With dead ends: 264 [2023-02-15 12:56:09,149 INFO L226 Difference]: Without dead ends: 264 [2023-02-15 12:56:09,150 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 [2023-02-15 12:56:09,150 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 16 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:09,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 728 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:56:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-15 12:56:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2023-02-15 12:56:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 161 states have (on average 1.670807453416149) internal successors, (269), 247 states have internal predecessors, (269), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:56:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 295 transitions. [2023-02-15 12:56:09,157 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 295 transitions. Word has length 106 [2023-02-15 12:56:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:09,159 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 295 transitions. [2023-02-15 12:56:09,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 12:56:09,160 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 295 transitions. [2023-02-15 12:56:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-15 12:56:09,167 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:09,167 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] [2023-02-15 12:56:09,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:09,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:09,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:56:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:09,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1842595626, now seen corresponding path program 1 times [2023-02-15 12:56:09,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:09,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615208309] [2023-02-15 12:56:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:09,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:09,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:09,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199140587] [2023-02-15 12:56:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:09,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:09,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:09,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:09,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:56:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 12:56:09,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:09,753 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1495 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_1495))) is different from true [2023-02-15 12:56:09,851 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 12:56:09,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 12:56:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 87 refuted. 0 times theorem prover too weak. 754 trivial. 1 not checked. [2023-02-15 12:56:09,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:10,026 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 12:56:10,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 12:56:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 709 proven. 88 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2023-02-15 12:56:10,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:10,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615208309] [2023-02-15 12:56:10,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:10,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199140587] [2023-02-15 12:56:10,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199140587] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:56:10,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:56:10,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2023-02-15 12:56:10,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529372973] [2023-02-15 12:56:10,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:10,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 12:56:10,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:10,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 12:56:10,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2023-02-15 12:56:10,044 INFO L87 Difference]: Start difference. First operand 264 states and 295 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 12:56:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:56:10,709 INFO L93 Difference]: Finished difference Result 422 states and 490 transitions. [2023-02-15 12:56:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 12:56:10,710 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 [2023-02-15 12:56:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:56:10,712 INFO L225 Difference]: With dead ends: 422 [2023-02-15 12:56:10,713 INFO L226 Difference]: Without dead ends: 422 [2023-02-15 12:56:10,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 226 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=261, Unknown=1, NotChecked=34, Total=380 [2023-02-15 12:56:10,713 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 359 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:56:10,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1814 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1233 Invalid, 0 Unknown, 449 Unchecked, 0.5s Time] [2023-02-15 12:56:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-02-15 12:56:10,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 262. [2023-02-15 12:56:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 161 states have (on average 1.6583850931677018) internal successors, (267), 245 states have internal predecessors, (267), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:56:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 293 transitions. [2023-02-15 12:56:10,722 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 293 transitions. Word has length 121 [2023-02-15 12:56:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:56:10,723 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 293 transitions. [2023-02-15 12:56:10,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 12:56:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 293 transitions. [2023-02-15 12:56:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-15 12:56:10,725 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:56:10,725 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] [2023-02-15 12:56:10,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 12:56:10,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:10,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:56:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:56:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1842595627, now seen corresponding path program 1 times [2023-02-15 12:56:10,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:56:10,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599960162] [2023-02-15 12:56:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:10,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:56:10,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:56:10,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288651428] [2023-02-15 12:56:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:56:10,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:56:10,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:56:10,977 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:56:10,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 12:56:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:56:18,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-15 12:56:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:56:18,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:56:26,050 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2100 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2100)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-15 12:56:26,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:56:26,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 12:56:26,248 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 12:56:26,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 12:56:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 590 proven. 316 refuted. 0 times theorem prover too weak. 494 trivial. 151 not checked. [2023-02-15 12:56:26,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:56:30,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:56:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599960162] [2023-02-15 12:56:30,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:56:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288651428] [2023-02-15 12:56:30,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288651428] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:56:30,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:56:30,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-15 12:56:30,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853980247] [2023-02-15 12:56:30,963 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:56:30,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 12:56:30,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:56:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 12:56:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=738, Unknown=2, NotChecked=54, Total=870 [2023-02-15 12:56:30,966 INFO L87 Difference]: Start difference. First operand 262 states and 293 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) [2023-02-15 12:56:33,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:35,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:37,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:39,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:43,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:47,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:49,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:53,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:55,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:56:57,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:20,116 WARN L233 SmtUtils]: Spent 8.72s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:57:30,978 WARN L233 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:57:37,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:40,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:42,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:57:43,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:57:43,072 INFO L93 Difference]: Finished difference Result 418 states and 488 transitions. [2023-02-15 12:57:43,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 12:57:43,073 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 [2023-02-15 12:57:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:57:43,074 INFO L225 Difference]: With dead ends: 418 [2023-02-15 12:57:43,074 INFO L226 Difference]: Without dead ends: 418 [2023-02-15 12:57:43,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 50.3s TimeCoverageRelationStatistics Valid=187, Invalid=1615, Unknown=8, NotChecked=82, Total=1892 [2023-02-15 12:57:43,075 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 383 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 5426 mSolverCounterSat, 44 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 5905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5426 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2023-02-15 12:57:43,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 1547 Invalid, 5905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5426 Invalid, 13 Unknown, 422 Unchecked, 32.9s Time] [2023-02-15 12:57:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-02-15 12:57:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 260. [2023-02-15 12:57:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 161 states have (on average 1.6459627329192548) internal successors, (265), 243 states have internal predecessors, (265), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:57:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 291 transitions. [2023-02-15 12:57:43,082 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 291 transitions. Word has length 121 [2023-02-15 12:57:43,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:57:43,082 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 291 transitions. [2023-02-15 12:57:43,083 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) [2023-02-15 12:57:43,083 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 291 transitions. [2023-02-15 12:57:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-15 12:57:43,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:57:43,084 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] [2023-02-15 12:57:43,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 12:57:43,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 12:57:43,297 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:57:43,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:57:43,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1207870859, now seen corresponding path program 1 times [2023-02-15 12:57:43,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:57:43,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770135251] [2023-02-15 12:57:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:57:43,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:57:43,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:57:43,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163761178] [2023-02-15 12:57:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:57:43,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:57:43,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:57:43,343 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:57:43,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 12:57:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:57:43,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 12:57:43,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:57:43,736 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2716 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2716))) is different from true [2023-02-15 12:57:43,804 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 12:57:43,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 12:57:43,822 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2717 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_2717))) is different from true [2023-02-15 12:57:43,890 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 12:57:43,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 12:57:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 174 refuted. 0 times theorem prover too weak. 574 trivial. 3 not checked. [2023-02-15 12:57:43,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:57:44,212 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 12:57:44,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 12:57:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 800 proven. 176 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2023-02-15 12:57:44,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:57:44,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770135251] [2023-02-15 12:57:44,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:57:44,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163761178] [2023-02-15 12:57:44,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163761178] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:57:44,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:57:44,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2023-02-15 12:57:44,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839768480] [2023-02-15 12:57:44,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:57:44,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 12:57:44,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:57:44,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 12:57:44,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=154, Unknown=2, NotChecked=50, Total=240 [2023-02-15 12:57:44,225 INFO L87 Difference]: Start difference. First operand 260 states and 291 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 12:57:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:57:44,978 INFO L93 Difference]: Finished difference Result 417 states and 485 transitions. [2023-02-15 12:57:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 12:57:44,979 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 [2023-02-15 12:57:44,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:57:44,980 INFO L225 Difference]: With dead ends: 417 [2023-02-15 12:57:44,980 INFO L226 Difference]: Without dead ends: 417 [2023-02-15 12:57:44,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 224 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=372, Unknown=2, NotChecked=82, Total=552 [2023-02-15 12:57:44,981 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 579 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 916 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 12:57:44,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1867 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1336 Invalid, 0 Unknown, 916 Unchecked, 0.6s Time] [2023-02-15 12:57:44,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2023-02-15 12:57:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 257. [2023-02-15 12:57:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 161 states have (on average 1.6273291925465838) internal successors, (262), 240 states have internal predecessors, (262), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:57:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2023-02-15 12:57:44,987 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 123 [2023-02-15 12:57:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:57:44,988 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2023-02-15 12:57:44,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 12:57:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2023-02-15 12:57:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-15 12:57:44,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:57:44,989 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] [2023-02-15 12:57:44,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 12:57:45,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 12:57:45,196 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:57:45,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:57:45,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1207870860, now seen corresponding path program 1 times [2023-02-15 12:57:45,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:57:45,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400196394] [2023-02-15 12:57:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:57:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:57:45,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:57:45,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692905200] [2023-02-15 12:57:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:57:45,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:57:45,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:57:45,228 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:57:45,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 12:57:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:57:46,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-15 12:57:46,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:57:46,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:57:56,257 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3337 Int) (v_ArrVal_3338 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3337) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3338)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-15 12:57:56,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:57:56,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 12:57:56,522 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 12:57:56,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 12:57:56,570 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3339 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3339) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-15 12:57:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:57:56,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 12:57:56,670 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 12:57:56,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 12:57:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 722 proven. 125 refuted. 0 times theorem prover too weak. 386 trivial. 318 not checked. [2023-02-15 12:57:57,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:57:57,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:57:57,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400196394] [2023-02-15 12:57:57,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:57:57,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692905200] [2023-02-15 12:57:57,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692905200] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:57:57,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:57:57,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-15 12:57:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959833573] [2023-02-15 12:57:57,746 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:57:57,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 12:57:57,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:57:57,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 12:57:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=410, Unknown=4, NotChecked=82, Total=552 [2023-02-15 12:57:57,747 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:57:59,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:01,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:06,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:10,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:14,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:58:26,755 WARN L233 SmtUtils]: Spent 8.67s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:58:43,167 WARN L233 SmtUtils]: Spent 15.44s on a formula simplification. DAG size of input: 62 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:59:05,874 WARN L233 SmtUtils]: Spent 21.85s on a formula simplification. DAG size of input: 71 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:59:11,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:59:11,385 INFO L93 Difference]: Finished difference Result 406 states and 473 transitions. [2023-02-15 12:59:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 12:59:11,385 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2023-02-15 12:59:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:59:11,387 INFO L225 Difference]: With dead ends: 406 [2023-02-15 12:59:11,387 INFO L226 Difference]: Without dead ends: 406 [2023-02-15 12:59:11,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 68.8s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=8, NotChecked=130, Total=1260 [2023-02-15 12:59:11,387 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 484 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 3507 mSolverCounterSat, 61 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 4183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3507 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 610 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:59:11,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 861 Invalid, 4183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3507 Invalid, 5 Unknown, 610 Unchecked, 14.3s Time] [2023-02-15 12:59:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-02-15 12:59:11,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 255. [2023-02-15 12:59:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 161 states have (on average 1.6149068322981366) internal successors, (260), 238 states have internal predecessors, (260), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:59:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2023-02-15 12:59:11,393 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 286 transitions. Word has length 123 [2023-02-15 12:59:11,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:59:11,394 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 286 transitions. [2023-02-15 12:59:11,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 12:59:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 286 transitions. [2023-02-15 12:59:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-15 12:59:11,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:59:11,395 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] [2023-02-15 12:59:11,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 12:59:11,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 12:59:11,601 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:59:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:59:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1175835145, now seen corresponding path program 1 times [2023-02-15 12:59:11,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:59:11,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692737575] [2023-02-15 12:59:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:59:11,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:59:11,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:59:11,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248830578] [2023-02-15 12:59:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:59:11,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:59:11,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:59:11,635 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:59:11,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 12:59:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:59:12,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 12:59:12,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:59:12,094 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3979 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3979)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-02-15 12:59:12,150 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 12:59:12,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 12:59:12,162 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_3980))) is different from true [2023-02-15 12:59:12,190 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_3980))) is different from true [2023-02-15 12:59:12,193 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_3980))) is different from true [2023-02-15 12:59:12,195 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3980 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_3980))) is different from true [2023-02-15 12:59:12,205 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 12:59:12,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-02-15 12:59:12,248 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3981 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3981))) is different from true [2023-02-15 12:59:12,328 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 12:59:12,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-15 12:59:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 713 proven. 87 refuted. 0 times theorem prover too weak. 310 trivial. 441 not checked. [2023-02-15 12:59:12,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:59:12,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:59:12,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692737575] [2023-02-15 12:59:12,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:59:12,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248830578] [2023-02-15 12:59:12,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248830578] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:59:12,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:59:12,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-15 12:59:12,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337091655] [2023-02-15 12:59:12,888 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:59:12,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 12:59:12,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:59:12,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 12:59:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=484, Unknown=6, NotChecked=294, Total=870 [2023-02-15 12:59:12,890 INFO L87 Difference]: Start difference. First operand 255 states and 286 transitions. Second operand has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 12:59:13,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:59:13,895 INFO L93 Difference]: Finished difference Result 440 states and 517 transitions. [2023-02-15 12:59:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 12:59:13,896 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 130 [2023-02-15 12:59:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:59:13,898 INFO L225 Difference]: With dead ends: 440 [2023-02-15 12:59:13,898 INFO L226 Difference]: Without dead ends: 440 [2023-02-15 12:59:13,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=779, Unknown=6, NotChecked=378, Total=1332 [2023-02-15 12:59:13,899 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 567 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 68 mSolverCounterUnsat, 39 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 3407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 39 IncrementalHoareTripleChecker+Unknown, 1894 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 12:59:13,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 1969 Invalid, 3407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1406 Invalid, 39 Unknown, 1894 Unchecked, 0.8s Time] [2023-02-15 12:59:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-02-15 12:59:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 332. [2023-02-15 12:59:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 233 states have (on average 1.6566523605150214) internal successors, (386), 308 states have internal predecessors, (386), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2023-02-15 12:59:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 443 transitions. [2023-02-15 12:59:13,910 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 443 transitions. Word has length 130 [2023-02-15 12:59:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:59:13,910 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 443 transitions. [2023-02-15 12:59:13,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 17 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 12:59:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 443 transitions. [2023-02-15 12:59:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-15 12:59:13,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:59:13,912 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] [2023-02-15 12:59:13,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 12:59:14,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 12:59:14,122 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-02-15 12:59:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:59:14,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1175835146, now seen corresponding path program 1 times [2023-02-15 12:59:14,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:59:14,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148662957] [2023-02-15 12:59:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:59:14,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:59:14,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:59:14,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479009966] [2023-02-15 12:59:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:59:14,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:59:14,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:59:14,162 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:59:14,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 12:59:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:59:19,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 142 conjunts are in the unsatisfiable core [2023-02-15 12:59:19,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:59:19,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 12:59:27,985 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 12:59:27,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-15 12:59:28,155 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 12:59:28,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 12:59:31,254 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-15 12:59:31,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 12:59:31,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 12:59:33,127 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_4631 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|))) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4631) |c_#length|) (<= (mod .cse0 4294967296) v_ArrVal_4631) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| .cse0)))) is different from true [2023-02-15 12:59:35,108 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (v_ArrVal_4631 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_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|) 4294967296))) (and (< 7 .cse0) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_4631) |c_#length|) (<= .cse0 v_ArrVal_4631)))) is different from true [2023-02-15 12:59:35,687 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 12:59:35,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-15 12:59:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 475 proven. 875 refuted. 0 times theorem prover too weak. 138 trivial. 63 not checked. [2023-02-15 12:59:37,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:59:41,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:59:41,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148662957] [2023-02-15 12:59:41,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:59:41,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479009966] [2023-02-15 12:59:41,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479009966] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:59:41,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:59:41,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2023-02-15 12:59:41,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605813124] [2023-02-15 12:59:41,258 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:59:41,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 12:59:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:59:41,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 12:59:41,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2484, Unknown=20, NotChecked=202, Total=2862 [2023-02-15 12:59:41,260 INFO L87 Difference]: Start difference. First operand 332 states and 443 transitions. Second operand has 52 states, 49 states have (on average 1.816326530612245) internal successors, (89), 47 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 12:59:43,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:59:45,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:59:49,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:59:53,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 12:59:57,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:01,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:04,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:08,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:12,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 13:00:16,568 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]